Tungsten & Sapphire Growth Furnace Price

Tungsten Carbide Straight Flute Tap Introduction

Details: Category: Tungsten Information; Published on Tuesday, 21 October 2014 17:37; Written by xjq; Hits: 490

The tungsten carbide straight flute tap is typically used in the thread machining of engine lathes, drilling machines and tapping machines, with a relatively low cutting speed.It performs well in the machining of high hardness materials and materials easier to cause tool damage, and powdery materials cutting.

The tungsten carbide straight flute tap has widest universality. It can process both non-ferrous metal and ferrous metal. However, this characteristic is also companied by the downside of being able to doing many things, but being not particularly good at something. It may possess two, four, or six teeth in the cutting part. Short taps are used in blind holes, while long taps in through holes. As long as the bottom hole is deep enough, longer tap should be applied as far as possible, because if there are more teeth to share cutting load, there will be longer tool life.

Tungsten Carbide Straight Flute Tap

Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com

Tel.: 86 592 5129696; Fax: 86 592 5129797

Email: sales@chinatungsten.com

Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com

Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com

Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Tungsten Carbide Spiral Pointed Tap Introduction

Details: Category: Tungsten Information; Published on Tuesday, 21 October 2014 17:34; Written by xjq; Hits: 519

Tungsten carbide spiral pointed tap is also known as EX-POT, mainly used in borehole and deep thread machining, and is of high intensity and cutting speed, long service life, stable dimension and clear threads (especially fine pitch threads). Generally, it has the same straight groove as the straight flute tap, and is a kind of its deformation. In the front part of tungsten carbide spiral pointed taps, there is a helical groove specially designed which can squeeze chip out of the hole with the help of rotation and at the same time avoid tap demage caused by cutting conjection. That is why tungsten carbide spiral pointed taps have higher cutting speed than straight flute taps in high precision threads processing.

Tungsten carbide spiral tap has larger core and higher intensity and thus can withstand higher cutting force. It performs well in non-ferrous metal, stainless steel and ferrous metal processing. In the borehole processing, spiral pointed tap should be applied with priority.

Tungsten Carbide Spiral Pointed Tap

Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com

Tel.: 86 592 5129696; Fax: 86 592 5129797

Email: sales@chinatungsten.com

Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com

Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com

Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

The Differences Between Real and Fake Gold 1

Details: Category: Tungsten Information; Published on Tuesday, 21 October 2014 08:56; Written by Sherry; Hits: 563

It's All About the Physics

All the ways to determine the authenticity of a coin or bar of precious metal are based on differences between physical properties of the valuable metal and the lesser metals used to swindle the buyer. Each metal is an element, meaning it can't be further broken down into another element (without very heavy equipment like a particle accelerator, which is not practical). An element has its own unique density, conductivity, reaction to acids, melting point, conductivity of sound through the metal, etc. A fake gold coin will necessarily have an exterior of gold to help fool the buyer, regardless of the contents of the interior and whether the coin is created from an alloy (mix of metals) or a slug of base metal with a cladding or plating of gold on the outside.

Visual Inspection

The easiest place to start is the visual appearance of each metal. Does the coin look gold in color? Gold has a dull golden shine. Once you've spent time handling gold, this is the first give away. Keep in mind that some coins are 99.99 percent pure gold. Others are designed for circulation and have some copper and silver alloyed with the gold. These coins have a reddish tint. Jewelers use these properties to make many different shades of gold for jewelry.

The color difference is exaggerated in these photos, but it gives an idea of the difference between 99.99% pure gold coins (left) and 90% pure gold coins with an alloy of copper and silver that make the coin harder and able to circulate (right).

Density

The physical characteristics of metals are immutable and this is the counterfeiter's first decision; which metal(s) to use for the fake. Each metal has characteristics like density, malleability, the speed of sound in the metal and so on.

gold

Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Tungsten News & Tungsten Prices, WML Version: http://m.chinatungsten.com

Tungsten Carbide Tap Advantages

Details: Category: Tungsten Information; Published on Tuesday, 21 October 2014 17:32; Written by xjq; Hits: 492

Tungsten carbide cutting tools have gradually replaced high-speed steel tools in turning machining, and so does the tungsten carbide tap. It has been used more and more often in threaded hole machining. Compared with the high-speed steel, the tungsten carbide is of higher hardness and but also higher brittleness, so when using tungsten carbide taps in tapping process, there exits a chip disposal problem. Despite all that, the tungsten carbide tap is still of high efficiency and long service life when used in processing cast iron and aluminium alloy materials. In car industry, the reducing of tap changing times is very competitive and crucial, which can be accomplished by using the tungsten carbide tap due to its long tool life. Using coated tungsten carbide taps with a samll helical angle to perform tapping machining on alumimium workpiece with a silicon content of about 1.5 % can obtain excellent machining effect. What is more, a tap made of submicron-grain tungsten carbide possesses higher toughness while maintains the same hardness, thus can work well in quenched steel, plastics and nickel base alloy cutting.

Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com

Tel.: 86 592 5129696; Fax: 86 592 5129797

Email: sales@chinatungsten.com

Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com

Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com

Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Choosing Brazed Tungsten Carbide Blade and Groove Shape

Details: Category: Tungsten Information; Published on Monday, 20 October 2014 17:46; Written by xjq; Hits: 493

There are five main types of brazed tungsten carbide blade in China currently:

A-type blade is used in 90° bullnose tools, facing tools, etc.

B-type blade is used in straight bullnose tools, facing tools, hole boring cutters, etc.

C-type blade is used in straight and bend bullnose hole boring cutters, glaives, etc.

D-type blade is used in cut-off tools, grooving tools, etc.

E-type blade is used in threading turning tools.

Brazed tungsten carbide blades will differ according to different blade groove shapes:

Open slot: It is simple for manufacture, smaller in welding area, suitable for C-type blade and sometimes D-type blade as well.

Semi-closed slot: It is relatively difficult for manufacture, but firm in blade welded. It is suitable for E-type blade.

Closed slot: It is difficult for manufacture, but firm in blade welded. It can increase welding area and is often used in threading cutters and suitable for E-type blade.

Undercut groove: It is used in cut-off tools and grooving tools of relatively smaller base area, thus increasing welding area and bond strength. It is complicated for manufacture and suitable for D-type blade.