TiC-WC based alloy products

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 ...

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 alloy, especially the high temperature strength ;Third, there are TiC, TiC-WC, TiC-Mo in the structure of the alloy at the same time 2 C, WC and solid solution bonding are equal to 5 phases, and the phase composition is complex and difficult to control

Therefore, the above background technology has defects such as low hardness and high temperature strength, poor wear resistance, difficult sintering control of products, poor molding accuracy and stability, and short service life.

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