The present invention discloses a method for preparing high density tungsten nickel-iron sintering process includes the following steps: 1) preparation: W content of tungsten powder> 99.95%; Ni content of nickel powder> 99.8%; Fe content iron of> 99.5% ; 2) Separator: Using a 200 mesh sieve, filtering the raw material powder; 3) with flour; 4) Die: The above mixed alloy powder filled in molded rubber bag; 5) cold isostatic pressing ; 6) Sintering: two-step sintering in hydrogen IF induction furnace sinter pass protection, divided into pre-sintered, solid-phase sintering, liquid phase sintering stages. Using the production process of the present invention, the processing of high-density tungsten nickel alloy has the following properties: tungsten nickel-iron alloy does not deform, even internal chemical composition and microstructure, relative density ≥99%; no internal cracks, bubbles and large crystals, machining excellent performance.


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The present invention discloses a method for preparing tungsten alloys of copper and zinc.

Specific process is: will micron pure tungsten powder and tungsten coated copper powder and micron copper, zinc powder by mixing, extrusion and cold isostatic liquid spark plasma sintering (SPS) and other methods to prepare a The relative density of 95% or more of tungsten copper-zinc alloy material. The advantages: by the production method according to the present invention can be prepared in more than 95% relative density, but also has high hardness and high strength composite tungsten, Cu and Zn. Brass with respect to pure copper has high strength and hardness, integrated tungsten high strength, high density and high conductivity brass, high thermal conductivity, high strength and hardness properties, prepare a suitable spark processing, electronic packaging and aerospace materials in the field of high temperature, corrosion of tungsten alloy of copper and zinc.


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The utility model relates to the technical field of timekeepers and specifically provides a tungsten steel hard alloy font nail.

The tungsten steel hard alloy font nail comprises a tungsten steel hard alloy font and nail feet connected on the lower surface of the tungsten steel hard alloy font. No matter how the air temperature or air humidity changes, the tungsten steel hard alloy font nail remains undeformed, wear-resistant, high-temperature-resistant and oxidation-resistant.

Therefore, a watch using the tungsten steel hard alloy font nail is also firm and durable and can maintain freshness and cleanliness for long. After being formed, the tungsten steel hard alloy font nail enables excellent glossiness and tenderness through polishing. Meanwhile, the tungsten steel hard alloy font nail has an attractive and elegant appearance. Electroplating and paint spraying operations during a conventional font nail processing procedure are no longer required. Environmental protection is achieved.

The labor cost is further reduced. After the upper surface is polished, the tungsten steel hard alloy font nail can have surface fineness reach more than 14 degrees and achieve ultra-precision mirror surface effects. The tungsten steel hard alloy font nail enables good surface light sensation effects.


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The present invention relates to a WC - Co or WC - Co - Cr thermal spray powder preparation method of the tungsten carbide powder and cobalt powder or tungsten carbide powder, cobalt powder and chromium powder are mixed in a certain ratio to prepare a slurry, spray granulation, the granulated powder is sieved and the degreasing treatment, in the vertical high-temperature sintering furnace rapid sintering the powder in free movement continuously and evenly by heating and cooling zones, and the completion of the sintering in the heated zone, the protection atmosphere: nitrogen, sintering temperature: 1000 ~ 1700 ℃, sintering time: 0.1 ~ 5s, and finally sintered powder required for grading and screening. The invention solves the spherical tungsten carbide matrix composites using thermal spray powder in the presence of long production cycle, low productivity and high energy consumption and other problems during the preparation of the traditional method; the use of the present invention, the process is simple, continuous production, energy saving and environmental protection, the resulting powder composition uniformity, high sphericity and good mobility, can be widely used in aerospace, machinery manufacturing, and petroleum and chemical industry.


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The invention relates to the technical field of compound preparation and in particular to a preparation method for tungsten disulfide.

The preparation method comprises the following steps: uniformly mixing tungstic acid with an ammonium trisulfide solution to obtain a mixture; putting the mixture into vulcanization equipment, vacuumizing, and heating in the vulcanization equipment at first stage for 50-70 minutes at the temperature of 650-750 DEG C; heating at second stage for 110-130 minutes at the temperature of 1350-1400 DEG C to obtain tungsten disulfide. According to the preparation method, the process is short, the used equipment is simple, and the environmental pollution is alleviated at the same time.


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The present invention belongs to the technical field of metallurgical smelting, more particularly to a method for preparing a melting tungsten electrode material.

Then vacuum electron beam melting temperature tungsten bulk mixture, solidification cooling; this method, tungsten powder and mixed rare earth oxide powder to obtain a mixed powder, then mixed the powder molding obtained by treating a mixture of tungsten block by pressing rare earth alloy ingot obtained tungsten; final rare earth tungsten alloy ingot is heat treated under vacuum, to obtain rare earth tungsten electrode material. The present invention provides an electron beam energy of a high-density tungsten smelting of rare earth materials, rare earth tungsten electrode material obtained after melting caused by high density, as compared with the hot pressing sintering, electron beam melting technology in the manufacture of refractory metals, with obvious advantage, the organization made better, improve the performance of the electrode materials by incorporating a certain amount of rare earth oxides, by analyzing the changes in microhardness, adding rare earth oxides can be judged on the hardness electrodes have improved to some extent.


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The invention provides a method for preparing a tungsten single crystal.

An electrochemical method is utilized to prepare the tungsten single crystal in a fused salt. The method takes fused Na2WO4 and WO3 as a fused salt medium and, takes a high-purity polycrystal tungsten plate as a counter electrode and taking common metal such as copper and steel, or nonmetal such as graphite as a substrate for growing the single crystal as well as a working electrode, and comprises the following steps of: applying a current under an air atmosphere at 700-1000 DEG C; and adjusting the current and the electroplating time, thereby obtaining the tungsten single crystal.

The method provided by the invention has the advantages of simple technological method, simple equipment demand, convenience in operation, low cost, and easiness in control of synthesizing conditions.


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The present invention relates to a method of annealing a metal plate, a metal plate of molybdenum, tungsten or molybdenum alloy plate tungsten alloy plate, a metal plate tungsten, molybdenum metal plate, an alloy of molybdenum-tungsten alloy plate or a ceramic plate board and industrial staggered fixture, placed in temperature of 700-1400 ° C in an annealing furnace from 0.5 to 10 hours incubation.

Advantages of the present invention is to ensure pure tungsten, machining procedures pure molybdenum, tungsten or molybdenum copper alloy copper alloy sheet after annealing both sides of the plate flatness and roughness, after simplification, improve work efficiency.


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The invention discloses an automation high-efficiency direct-current-controlled dynamic manufacturing device and method of tungsten needles.

In the device, an electrochemical reaction principle is adopted, a tungsten wire is driven by a linear motor to move up and down in NaOH corrosion liquid in a reciprocating manner so that a reaction is carried out between an anode tungsten wire and a cathode annular copper electrode, and the change of current in a circuit is monitored by utilizing a sampling resistor, a low-pass filter circuit, a voltage follower and a high-speed comparer; when the tungsten wire is corroded to be broken in an electrolyte solution, the sudden change of the current in the circuit causes an output signal of the comparer to change, a voltage applying circuit is switched off and a whole electrolytic corrosion process is finished; and furthermore, the conical degree and the tip radius of the tungsten needle can be adjusted by utilizing the change of motion speed of the linear motor.

The device and the method, disclosed by the invention, have the characteristics of high automation degree of tungsten needle preparation, good repeatability and high efficiency.


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The invention discloses a method for improving the heat conductivity of tungsten copper alloy.

The method comprises the following steps: step 1, the tungsten copper alloy is prepared through a powder metallurgy method, wherein the mass fraction of the tungsten is 80-85%, and the rest is copper; step 2, the tungsten copper alloy prepared through the powder metallurgy method is subjected to heat treatment under ultrahigh pressure, wherein the ultrahigh pressure is 3.0-5.0 GPa, the heating temperature under the ultrahigh pressure is 820-900 DEG C; the tungsten copper alloy is subjected to heat insulation for 20-30 min, and then is cooled naturally under the ultrahigh pressure until being cooled to the room temperature; step 3, the tungsten copper alloy subjected to the heat treatment under the ultrahigh pressure is placed in a nitrogen-protected normal-pressure resistance furnace to be heated to 450-550 DEG C; the time for aging treatment is 90-120 min; the tungsten copper alloy is cooled naturally until being cooled to the room temperature. According to the method, the problem that tungsten copper alloy prepared through the powder metallurgy method is not high in density and lower in heat conductivity is solved. The method mainly adopts the ultrahigh-pressure heat treatment technique, and has the advantages that the feasibility is high, the technique is simple, the quality of the tungsten copper alloy is stable, and the heat conductivity of the tungsten copper alloy can be improved greatly.


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