TiC-WC based alloy products

A technology for base alloys and products, applied in the field of TiC-WC base alloy products, can solve the problems of low hardness and high temperature strength, excessive liquid phase, poor wear resistance, etc., and achieve strong corrosion resistance and oxidation resistance, strength And the effect of high hardness and uniform metallographic structure

Active Publication Date: 2006-11-22
ZIGONG CEMENTED CARBIDE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, the composition of the binder phase is as high as 40wt% or more. Although the high content of the binder phase can improve the bending strength of the alloy, it also reduces the wear resistance and hardness at the same time. Deformation; Second, adding Mo (molybdenum) element to the alloy composition, although Mo can wet TiC to make sintering densified, but at the same time it will form a brittle phase and wrap around TiC particles to reduce the strength of the a

Method used

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  • TiC-WC based alloy products

Examples

Experimental program
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Effect test

Example Embodiment

[0008] Example 1: This example takes the production of guide rollers for high-speed wire rod rolling as an example (according to 100kg batches per batch):

[0009] A. Wet grinding ingredients: Put 56.5kgTiC, 18kgWC, 14kgNi, 10kgCo and 1.5kgCr powders that meet the industrial production standards in a ball mill. After 64 hours of warm milling and mixing, add 2.0kg of paraffin wax to continue ball milling and mixing, and the slurry will pass 320 Mesh sieve, the obtained mixed powder is sent to a vacuum dryer for drying treatment at a temperature of 100°C to remove the wet grinding medium, and after cooling, homogenization is performed to obtain the mixed powder for use; the wet grinding medium in this embodiment is hexane;

[0010] B. Compression molding and pre-sintering: The obtained mixed powder is fed into a mold and pressed into a guide roller blank; then it is sent into a vacuum furnace for calcination at 500°C for 75 minutes, paraffin is removed, and it is machined after cool...

Example Embodiment

[0013] Example 2: Take the production of wear-resistant and corrosion-resistant ball valve core and valve seat as an example (according to 100kg batches per batch):

[0014] A. Wet grinding ingredients: put industrial 30kgTiC, 54kgWC, 7.5kgNi, 7.5kgCo and 1.0kgTa powders in a ball mill; the following processes and parameters (including steps B and C) are the same as in Example 1.

[0015] The product of this example is tested: density 9.0g / cm 3 , Hardness HRA≥90.5, bending strength 2000N / mm 2 , Porosity A 02 B 00 C 00 .

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Abstract

The invention discloses a TiC-WC base alloy guide roll and spool, valve seat in the metal ceramic and hard alloy manufacturing domain, which comprises the following parts: 30-60 wt percent TiC, 15-55 wt percent WC and 0-3 wt percent Ta as hard phase, 10-30 wt percent Co+Ni as adhesive phase and 0-3.0 wt percent Cr as grain growing inhibitor. The density of product is 0.3-0.5 times as WC base hard alloy density with 2500 N per mm2 anti-bending strength and 87.0-90.5 percent rigidity HRA, which possesses light quality, high rigidity and abrasion-proof property.

Description

technical field [0001] The invention belongs to TiC-WC base alloy products in the field of cermet and cemented carbide production, in particular a guide roller and a spool valve with TiC and WC as the main hard phase and Ni / Co as the bonding phase Seats and other alloy products. Background technique [0002] The guide rollers, guide rollers, pinch rollers and other guide rollers used to transport the rolled red steel of wire and bar to the roll groove on the high-speed wire rolling line to prevent accidents such as steel winding and tail flicking, etc., due to long-term Working under the harsh conditions of high temperature of 900-1100 ℃ and a speed of about 35000 rpm, the requirements for high-temperature strength, high-temperature wear resistance, oxidation resistance and the density (specific gravity) of the components are relatively high. Traditional guide rollers are generally made of cast steel and high-speed steel. Although they have the advantages of wide source of ...

Claims

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Application Information

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IPC IPC(8): C22C29/06
Inventor 于绍武黄宇王晓灵
Owner ZIGONG CEMENTED CARBIDE CORP
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