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A kind of nonmagnetic cemented carbide for instrument shaft and its preparation method

A cemented carbide, non-magnetic technology, applied in the field of non-magnetic cemented carbide for instrument shafts and its preparation, can solve the problems of limited use range, low hardness, measurement accuracy interference, etc., and achieve a wide range of use and high hardness. , the effect of good work stability

Active Publication Date: 2021-10-08
江西中孚硬质合金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The instrument transmission shaft is mainly made of steel, and its main defect is low hardness, not durable and because it is a magnetic material, its measurement accuracy is disturbed and affected in the widespread electromagnetic environment, and the scope of use is limited.

Method used

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  • A kind of nonmagnetic cemented carbide for instrument shaft and its preparation method
  • A kind of nonmagnetic cemented carbide for instrument shaft and its preparation method
  • A kind of nonmagnetic cemented carbide for instrument shaft and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment takes the total weight of 100kg as an example for illustration:

[0039] Step 1, weighing raw materials:

[0040]

[0041] WC powder requirements: Fsss particle size: 2-4u, carbon content: 5.91-5.95%;

[0042] W powder requirements: Fsss particle size: 2-4u;

[0043] Ni powder requirements: Fsss particle size: 1.5-2.5u, Ni powder is preferably Canadian nickel powder;

[0044] Cr 3 C 2 Powder requirements: Fsss particle size: 1-2u;

[0045] Mo powder requirements: Fsss particle size: 1-2u;

[0046] Step 2, mixing the above raw materials, and then adding a wet grinding agent for wet grinding (such as alcohol);

[0047] Step 3, sieving;

[0048] Step 4, after drying, sieve again;

[0049] Step 5, adding a molding agent for mixing;

[0050] Step 6, extrusion molding;

[0051] Step 7, get rid of forming agent;

[0052] Step 8, sintering;

[0053] Step 9, physical testing; check whether the magnetic force, void, density, strength, and hardness o...

Embodiment 2

[0062] This embodiment is basically the same as Embodiment 1, except that MoC powder is used instead of Mo powder.

Embodiment 3

[0064] The present embodiment is basically the same as embodiment 1, and the difference is that the raw materials taken are:

[0065]

[0066]

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Abstract

The invention discloses a non-magnetic hard alloy for an instrument shaft and a preparation method thereof. The hard alloy includes the following raw materials in weight percentage: WC powder: 86.5%, W powder: 1.6%, Ni powder: 11%, Cr 3 C 2 Powder: 0.4%‑0.6%, Mo powder or MoC powder: 0.3%‑0.5%. The preparation method includes: weighing raw materials, wet grinding, sieving, sieving after drying, adding molding agent for mixing, extruding, removing molding agent, sintering, physical testing, shape inspection to obtain the product, and processing to obtain the instrument shaft. The invention not only can meet the hardness requirement of the instrument shaft, but also has no magnetism, so that the instrument can resist electromagnetic interference, has good working stability, and can work normally without being affected in the environment where a large electric magnetic field exists around.

Description

technical field [0001] The invention relates to a hard alloy material, in particular to a nonmagnetic hard alloy for an instrument shaft and a preparation method thereof. Background technique [0002] The instrument transmission shaft is mainly made of steel, and its main defect is low hardness, not durable and because it is a magnetic material, its measurement accuracy is disturbed and affected in the widespread electromagnetic environment, and the scope of use is limited. . [0003] Cemented carbide material is an alloy material made of hard compound of refractory metal and bonding metal through powder metallurgy process. Cemented carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance, which basically remain unchanged even at a temperature of 500°C , It still has high hardness at 1000 °C. Therefore, cemented carbide materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/08C22C1/05C22C1/10B22F9/04B22F3/20B22F3/10
CPCB22F3/1021B22F3/20B22F9/04B22F2009/042C22C1/051C22C29/067C22C29/08C22C2202/02
Inventor 李云卿
Owner 江西中孚硬质合金股份有限公司
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