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Carbide Inserts Compressive Strength

Carbide Inserts Compressive strength

Carbide mechanical properties

Carbide as an industrial tooth, is one or more refractory metal carbide (WC, TiC, etc.) as a hard phase, with transition metal (Co, etc.) as a binder phase, the use of powder metallurgy technology to produce production Such as WC, TiC, TaC, NbC, etc., commonly used bond phase with Co, Ni, Fe, etc. The strength of cemented carbide depends mainly on the bonding phase of the cemented carbide tool The cemented carbide has the advantages of high strength, high hardness, abrasion resistance, corrosion resistance, high temperature resistance and small linear expansion coefficient. It is widely used in many industrial production and processing operations and is one of the most excellent tool materials. According to the relevant parameters of physics to analyze, the mechanical properties of cemented carbide mainly in the following areas:

1. bending strength

The flexural strength of the cemented carbide is lower than that of the high-speed steel, and even the flexural strength of the YG8 cement is higher than that of the high-speed steel. The higher the cobalt content in the cemented carbide, the higher the strength The flexural strength of WC-TiC-Co alloy decreases with the increase of TiC content, and the size of WC grains also affects the strength of cemented carbide in addition to the kind of carbide. The flexural strength Carbide Inserts of the cement is higher than that of the medium grain cemented carbide.

2. Compressive strength

Carbide compressive strength is high, higher than the high-speed steel 30% -50%, about 3500-5600MPa, hot isostatic pressing products up to 6000MPa. Carbide compressive strength and cobalt content, cobalt content The compressive strength of fine cemented carbide is higher than that of coarse grains, and the compressive strength of YT cement is lower than that of YG cemented carbide, which decreases with the increase of TiC content. A small amount of TaC, NbC, VC, etc. can refine the WC grains, thereby increasing the compressive strength.

As the compressive strength of cemented carbide is much higher than the bending strength, so in the design of the tool structure and the choice of carbide blade, should try to make the Carbide Grooving Inserts head in the compressive stress state, and less bending torque .3. Tensile strength

Carbide tensile strength of 750-1500MPa, about the compressive strength of 1 / 4. Due to the impact of cemented carbide material a lot of factors, so a carbide tensile strength is usually in a certain range Inside.

4. Impact toughness

The impact toughness of cemented carbide is lower than that of high speed steel, and the impact toughness of YG8 alloy is 30-40KJ / m2. The impact toughness of W18Cr4V high speed steel is 180-320KJ / m2.

The impact toughness of TiC-containing cemented carbide decreases with the increase of 6% TiC content to 10%, and the impact toughness of WC-Co cemented carbide has a certain influence, and at higher temperature , Impact toughness has improved.

Because the impact toughness of cemented carbide is lower than that of high speed steel, it is not suitable for use in the case of strong impact and vibration, otherwise it may cause trouble. The impact toughness of cemented carbide fluctuates greatly, its absolute value is related to the test method, So compare the impact toughness of cemented carbide, it should be practical with the same instrument, compared the same size of the sample.

5. Fatigue strength

The fatigue strength of the cemented carbide is higher than that of the cemented carbide, and the fatigue strength of the cemented carbide is related to the surface quality of the sample. The better the degree of smoothness, the higher the fatigue strength.

The tungsten honing Blog: https://francisphy.exblog.jp/
by adriantrum | 2023-05-16 10:49


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