China's "multiple composite rare earth tungsten electrodes and preparation technology" results recently passed expert appraisal. The study by Beijing Click here for more weather forecasts for cities of Beijing and the Beijing Industrial University of Mining and Metallurgy Research Institute Beijing Tungsten Molybdenum Material Factory co-developed multi-composite rare earth tungsten electrodes series of new products, manufacturing process and equipment, and industrial testing equipment, such as full technology, comprehensive performance is better than radioactive thorium tungsten electrode to solve China's relevant materials industry is a major technical problems.

Tungsten is a kind of widely used welding, plasma welding, spraying, cutting technology and metallurgical industry in the critical heat source material, tungsten electrodes used worldwide each year the total consumption over 1600 tons. But currently using tungsten electrodes that there is still more than 70% of radioactive contamination thoriated tungsten electrodes, seriously polluting the environment and endanger human health. "Multiple composite rare earth tungsten electrodes and preparation technology" project independently developed a diverse composite rare earth tungsten electrode material, not only integrated performance, but because they do not use radioactive elements thorium, to achieve a non-radioactive contamination in the field of green production and be used.

Chen Yunbo other three by the Academy of Sciences, 863 new materials technology special functional materials such as technical subject matter expert Chow head 13 experts appraisal committee believes that the project overall technology has reached the international advanced level. Project main features and innovations embodied in the establishment of a composite rare earth tungsten electrode burning model, explaining the electrodes wear mechanism reveals multiple composite rare synergy mechanism, proposed the use of rare earth complex synergistic composition design principles, invented the integrated welding performance is better than the existing multi-thoriated tungsten electrode composite rare earth tungsten electrodes; proven rare earth tungsten electrodes multivariate powder metallurgy and plastic processing and other preparation processes were investigated to develop a diversified preparation of rare earth doped tungsten electrodes directly APT complex, large temperature gradient reduction, low current vertical melt sintering technology, the formation of rare earth tungsten electrodes for industrial production processes; integrated innovation developed production line key equipment, to achieve efficient production and process quality control, industrial production yield than the current thorium Tungsten 5% higher than the class-leading levels of materials processing, and the establishment of domestic rare earth's first multi-composite tungsten electrode production lines with annual production capacity of 120 tons.


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June 29 , multi-composite and preparation of rare earth tungsten electrodes through the identification technology in Beijing , China Academy of Engineering left Tieyong , China Nonferrous Metals Industry Association vice president Niu due Jian, China Tungsten Industry Association president Zhou Juqiu other leaders and experts attended the appraisal. Tungsten is a kind of widely used welding, plasma welding, spraying, cutting technology and metallurgical industry in the critical heat source materials used annually worldwide total consumption of tungsten electrodes has reached 1,600 tons ( the highest melting point of tungsten metal fuel arc volatilization ) , development of market demand as the economy is still growing steadily.

However, currently used in over 70% of the tungsten electrode is still contaminated with radioactive thorium tungsten electrode , serious pollution of the environment and harm to human health , workers in countries around the world working to develop alternative materials , but has not been fully replace thoriated tungsten electrodes industrial products . The project bears the national " 973", " 863 " and other topics to explore in the long-term accumulation of Beijing University of Technology , based on research cooperation, independently developed a comprehensive multi -performance composite rare earth tungsten electrode material and preparation techniques , in Beijing General Research Institute of Mining and Metallurgy Beijing tungsten & Molybdenum material Factory achieve the industrialization of the product by the National welding Material quality supervision and Inspection Center and users prove than the current element thorium tungsten and rare earth tungsten electrodes superior performance to meet the industry standards and requirements . Project research breakthrough material composition , manufacturing process and equipment, and testing equipment and other core technologies , the formation of 15 patented technologies and production technology standard system. Currently , the new multi- rare earth tungsten electrode tungsten and molybdenum products in the Beijing plant material to achieve a stable mass production and large-scale industry in the global market , applied to industry, agriculture , national defense and other fields. Since 2004, the sales revenue of 130 million yuan has been obtained obvious economic and social benefits.

Thorium tungsten electrode with current technology compared to the composition of the product design , manufacturing process , technical performance and environmental impact , etc. are prominent innovations and significant progress , the overall technological level of similar products abroad have been better . The full range of products with independent intellectual property rights successfully replaced radioactive tungsten electrodes , truly low-emission in the field , the development of non-polluting , can be applied to the field of TIG and plasma technologies in a variety of steel and non-ferrous metals , aluminum, copper , titanium such as welding , cutting, painting , smelting , involving a wide range of civilian and military industries ; industrialization of the project after the Beijing material industry to solve a major technical problems, improve China tungsten processing industry 's international competitiveness , and promote the technological progress and industrial structure optimization and upgrading .


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Multiple composite rare earth tungsten electrodes swaging string playing equipment and technology invention uses string playing devices relative position of each device is as follows : The first furnace 1 is the tube length of 1m molybdenum wire furnace, the first furnace and the first rotary swaging machine 2 the distance between 15cm ( 15cm i.e. the gap between the two ) , the first guide roller 3 and the first rotary forging machine 2 and the distance between the second heating furnace 4 are 10cm, the second furnace is tube length of 0.7m molybdenum wire tube furnace , and the second rotary forging machine 5 and the second distance between the heating furnace 4 15cm, and the second guide roller and the distance between 10cm.

B203 selected will pass the billet forging Φ6.5 boron oxide into two-string playing machine for processing, billet composition: percentage by weight , of rare earth oxide content of 0.44% lanthanum oxide , yttrium oxide, 1.32% , 0.44% cerium oxide , the balance being tungsten, the first of the first heating furnace 1, the second heating furnace 4 heated to 1450 ℃, the billet feed speed is controlled 3m/min, the first step of setting a first rotary hammer machine 2 and the second rotary hammer machine 5 with mold system as the Φ6.0, Φ5.6, the first guide roller 3 speed 2.9m/min, the second guide roller 6 speed is set to 3.4m/min, after the first processing procedures , will be placed with billet molding system as the Φ5.2, Φ4.8 string play equipment for the second processing procedures , the first and second heating furnace 4 furnace a temperature set at : 1400 ℃ the first guide roller 3 speed 2.9m/min, the second guide roller 6 speed is set to : 3.4m/min; billet into the match after molding system as : Φ4.4, Φ4.1 third said processing step , the first 1 and the second heating furnace 4 furnace temperature was set at 1400 ℃, the first guide roller 3 speed of 3.0m/min, the second guide roller 6 is set to speed : 3.4m/min ; three step is completed , began to enter the B201 stage in the B201 stage tungsten processed through two processes , the first process with mold system as : Φ3.9, Φ3.6, first and second heating furnace 1 furnace temperature to 4 : 1350 ℃ first guide roller 3 speed of 2.8m/min, the second guide roller 6 temperature to 3.2m/min. Second step with mold system as the Φ3.3, Φ3.0, first and second furnace furnace a temperature set at 4 : 1350 ℃ first guide roller 3 speed 3.0m/min, the second conductive material roller 6 speed is set to : 3.6m/min, a variety of specifications available Φ6-Φ3 rare earth tungsten electrode material .


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Today, rare earth market weakness steady, the market demand for light , few inquiries . Recently purchased less because some loose oxides and metal prices down in the short term is likely to continue downward.

Currently gadolinium products market , less turnover , inquiries are not active, Baotou manufacturers that now gadolinium oxide with ticket prices have been at 185,000 yuan / ton, gadolinium- iron with a ticket price of 195,000 yuan / ton, compared with 9 prices were already obvious downside , there are no signs of demand against warm , afternoon , or continue to shock .

Yttria market , prices were unchanged in recent days , traders quoted in the 7.5-7.8 yuan / ton or so , the price is slightly down slightly from last week . Recent yttrium oxide, samarium and other less attention , samarium oxide have less purchasing inquiries , insiders reflect recent orders basically no samarium oxide , have less purchasing, market price of about 22,000 yuan / ton.

Due to the recent light rare earth market , praseodymium neodymium , dysprosium or related products market weakness , the downstream magnetic scrap market was also affected, today part of the magnetic electric car scrap recyclers price continued to fall by 1 yuan / kg, according to a recycling factory disclosed, bad bad market quotations are not willing receiving strong magnetic late scrap prices may continue to fall.


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Hunan Institute of Rare Earth Materials borne high performance rare earth materials research and industrial projects recently passed Changsha organization's project acceptance.

The Group believes that the project effectively promote green lighting industry in Hunan Province , the electronics industry , paint industry and other aspects of development , is conducive to the province 's rare earth resources advantages into industrial advantages. The project team developed a high-performance rare earth materials make energy-saving lamp switch 50000 times does not appear blackheads, average life of 30,000 hours or more ; established the first domestic microwave synthesis phosphor prepared multicomponent model production lines, advanced microwave heating methods are used. The project implementation process to establish an annual output of 200 tons of light rare earth phosphor production lines to produce 50 million fluorescent lamps and high power LED lamp production lines, to achieve annual sales income of 164 million yuan .


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Multiple composite rare earth tungsten electrodes swaging string playing equipment and technology invention uses string playing devices relative position of each device is as follows : The first furnace tube length of 1m molybdenum wire furnace, the first furnace and the first rotary swaging machine 2 the distance between 15cm ( 15cm i.e. the gap between the two ) , the first guide roller and the first rotary forging machine and the distance between the second furnace are 10cm, the second furnace to furnace tube length 0.7m molybdenum wire tube furnace , and the second rotary forging machine 5 and the distance between the second furnace 15cm, and the second guide roller and the distance between 10cm.

B203 selected will pass the billet forging Φ6.5 string into boron oxide playing machine for processing , the blank of the composition: percentage by weight , of rare earth oxide content of 0.44% lanthanum oxide , yttrium oxide, 1.32% , 0.44% oxide cerium , and the balance tungsten, first the first furnace , a second heating furnace 4 heated to 1470 ℃, the billet feed speed is controlled 2m/min, the first step of setting a first rotary hammer 2 and the the second rotary hammer machine 5 with mold system as the Φ6.0, Φ5.6, the first guide roller 3 speed 2.3m/min, the second guide roller 6 speed is set to 2.7m/min, after the first procedure after processing , the billet into the distribution system as the model Φ5.2, Φ4.8 string play equipment for the second processing procedures , the first and second heating furnace 4 furnace a temperature set at : 1430 ℃, the first a guide roller 3 speed 2.3m/min, the second guide roller 6 speed is set to : 2.7m/min; billet into the match after molding system as : Φ4.4, Φ4.1 the third step processing the first and second heating furnace 4 furnace temperature was set at 1430 ℃, the first guide roller 3 speed of 2.4m/min, the second guide roller 6 speed to : 2.7m/min; three after the process , began to enter the B201 stage in the B201 stage tungsten processed through two processes , the first process with mold system as : Φ3.9, Φ3.6, first one and the second furnace temperature furnace 4 as : 1430 ℃ first guide roller speed of 2.2m/min, the second guide roller temperature to 2.6m/min. Second step with mold system as the Φ3.3, Φ3.0, first and second furnace temperature furnace 1 as : 1370 ℃. The first guide roller 3 speed 2.4m/min, the second guide roller 6 speed is set to : 2.9m/min, a variety of specifications available Φ6-Φ3 rare earth tungsten electrode material .


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October 16 rare earth products price quotes

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Multiple composite rare earth tungsten electrodes swaging equipment and technology to fight the invention of string string playing devices using the relative position of each device is as follows : The first furnace tube length of 1m molybdenum wire furnace, the first furnace and the first rotary swaging machine 2 the distance between 15cm ( 15cm i.e. the gap between the two ) , the first guide roller and the first rotary forging machine and the distance between the second furnace are 10cm, length of the second furnace to furnace molybdenum wire is 0.7m tube furnace , rotary forging machine and the second distance between the second furnace 15cm, and the second guide roller and the distance between 10cm.

B203 selected will pass the billet forging Φ6.5 string into B202 playing machine for processing , the blank of the composition: percentage by weight , of rare earth oxide content of 0.44% lanthanum oxide , yttrium oxide, 1.32% , 0.44% CeO2, the balance being tungsten, the first of the first furnace , a second heating furnace 4 heated to 1500 ℃, the billet feed speed is controlled 3m/min, the first step of providing the first and second rotary rotary hammer machine hammer mold system as the machine is equipped Φ6.0, Φ5.6, the first guide roller speed 3.5m/min, the second guide roller speed is set to 4.0m/min, after processing through the first process , the billet placed with mold system as the Φ5.2, Φ4.8 string play equipment for the second processing procedures , the first and second furnace temperature furnace set at : 1450 ℃, the first guide roller speed is 3.5m / min, a second guide roller 6 speed is set to : 4.1m/min; billet into the match after molding system as : Φ4.4, Φ4.1 the third step in the processing of the first furnace and the second furnace temperature was set at 1450 ℃, the first guide roller speed 3.6m/min, the second guide roller speed is set to : 4.1m/min; three step is completed , began to enter the B201 stage in the B201 stage tungsten is processed through two processes , the first process with mold system as : Φ3.9, Φ3.6, first one and the second furnace temperature furnace set at : 1450 ℃ first guide roller speed is 3.3 m / min, the second guide roller temperature to 3.9m/min. Second step with mold system as the Φ3.3, Φ3.0, first and second furnace temperature furnace 1 as : 1400 ℃. The first guide roller speed 3.6m/min, the second guide roller speed is set to : 4.3m/min, a variety of specifications available Φ6-Φ3 rare earth tungsten electrode material .


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Multiple composite rare earth tungsten electrodes swaging process string playing devices invented by two of the same model is used , the same frequency and speed of rotary forging machine (B201-B201, B202- B202) consisting of string playing devices multiple composite rare earth tungsten electrode material B202, B201 stage processing , B203, B202, B201 as tungsten and molybdenum in the regular machining processes , typically used for segmentation swaging process , is the use of B-203, B-202, B-201 swaging the swaging machine for processing . B-203, B-202, B-201 rotary forging machine for the device model , B-203 rotary forging machine rotary hammer stroke max , suitable for processing large workpieces ; B-202 rotary forging machine rotary hammer stroke , followed by appropriate machining small parts ; B-203 rotary forging machine rotary hammer stroke minimum , generally used for processing smaller parts. Die change system Φ6 other means swaging touched minimum diameter of 6mm.

Multiple composite rare earth tungsten electrodes swaging process parameters string playing devices formulation is based on multiple composite rare earth tungsten electrode materials developed organizational variation , the process of deformation of the electrode material organizational changes, recovery temperature and the recrystallization temperature is also based on the degree of deformation change so as to avoid multiple composite rare earth tungsten electrode material embrittlement recrystallization , also need to change the processing temperature to keep the temperature in the reply above the recrystallization temperature. Therefore, the equipment and technology to match the technical parameters , and is limited to multi-composite production and processing of rare earth tungsten electrodes , the main advantages of this process are: ( 1 )A process through two rotary forging dies , the original B202 6 step process reduced to three , the B201 process in four steps to reduce the current two , the processing efficiency doubled. ( 2 )Use of string playing techniques , billet machine after the first one rotary hammer forged quickly after entering the next rotary hammer forging machine , to avoid heat loss , and thus economic energy .


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Multiple composite tungsten electrodes swaging process strings play equipment technical problems , multiple composite tungsten electrodes swaging equipment technology invented string playing the main purpose is to adapt to multiple composite rare earth tungsten electrodes mechanical properties of materials , the use of string playing techniques to achieve efficient processing of tungsten materials , multiple composite tungsten electrodes swaging string playing equipment technology invented by two of the same model using the same frequency, the same speed rotary forging machine (B201-B201, B202-B202) string playing devices consisting of multiple composite rare earth tungsten electrode material B202 , B201 stages of processing , wherein :

( 1 ) First, the first heating furnace 1, the second heating furnace 4 heated to 1450 ~ 1500 ℃, and after the swaging through B203 diameter Φ6.5 polyhydric composite rare earth tungsten electrode material to rate 2 ~ 3m/min fed rotary hammer device starts playing string processing ;

( 2 ) In the B202 stage three times to go through processing , process systems as :

First: the first rotary hammer machine 2 optional Φ6.0 mold ; second rotary hammer machine 5 matching Φ5.6 mold ; first furnace, the second furnace temperature is set to : 1450 ~ 1500 ℃;

Second: the first rotary hammer machine matching Φ5.2 mold ; second rotary hammer machine matching Φ4.8 mold ; first furnace, the second furnace temperature is set : 1400 ~ 1450 ℃;

The third way: the first rotary hammer machine matching Φ4.4 mold ; second rotary hammer machine 5 matching Φ4.1 mold ; first furnace, the second furnace temperature is set to : 1400 ~ 1450 ℃;

( 3 ) In the B201 through two sub- processing stage , the process system is :

First: the first rotary hammer machine matching Φ3.9 mold ; second rotary hammer machine matching Φ3.6 mold ; first furnace, the second furnace temperature is set : 1400 ~ 1450 ℃;

Second: the first rotary hammer machine 2 optional Φ3.3 mold ; second rotary hammer machine 5 matching Φ3.0 mold ; first furnace, the second furnace temperature is set to : 1350 ~ 1400 ℃; through the above processing can get Φ6-Φ3 diverse composite rare earth tungsten electrode material .


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