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Solid solution alloy powder used for cermet and preparation method

A solid solution alloy and cermet technology, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as reducing sintering temperature, and achieve the effect of improving alloy performance, saving sintering time, and controllable ball milling time

Active Publication Date: 2019-08-09
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned problems, the first purpose of the present invention is to provide a solid solution alloy powder for cermets. The solid solution powder of multiple active elements is added as the main body, which can effectively overcome the complex metallographic structure and interface structure that is prone to thermal stress. The shortcoming of the high-temperature liquid phase sintering phase effectively reduces the sintering temperature when the solid solution bone phase is formed, and the alloy "core-ring" structure formed by it is uniform in structure, and the cermet prepared by it has excellent comprehensive performance; another purpose of the present invention is to A preparation method of cermet solid solution alloy powder is provided to realize the high-efficiency preparation technology of the above-mentioned multi-component active solid solution alloy powder. The addition of active alloy elements is easy to control, and effectively reduces the impact of other impurity elements on the alloy caused by traditional compound powder batching. Pollution

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  • Solid solution alloy powder used for cermet and preparation method

Examples

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Effect test

Embodiment 1

[0048] Weigh 755g of TiC powder and 245g of Mo powder. Put titanium carbide powder in a graphite boat and compact it, then put it into a vacuum sintering furnace for purification, the purified massive titanium carbide is crushed by a crusher, and then put into a dry ball mill for ball milling. The alloy used in the ball milling process The diameter of the ball is 20 mm, the ratio of ball to material is 5:1, mixed and ball milled for 10 h, and then sieved on a vibrating sieve with an aperture of 150 μm. The above-mentioned titanium carbide powder and molybdenum powder were mixed in a mixer. The diameter of the alloy ball in the mixer was 10 mm, the ratio of ball to material was 8:1, and the mixing ball milled for 64 hours.

[0049] Put the prepared charge into the graphite boat for compaction, then put it into the vacuum carbonization furnace, start the vacuum pump, and when the vacuum degree is less than 30Pa, power on and heat up. During the heating process, the temperature f...

Embodiment 2

[0057] Weigh 450g of TiO 2 powder, 300g of TiC powder, 100g of Mo powder, 100g of WC powder and 50g of C powder. Put titanium carbide powder and titanium nitride powder in a graphite boat and compact them, and then put them into a vacuum sintering furnace for purification. The purified massive titanium carbide is crushed by a crusher, and then put into a dry ball mill for ball milling. The alloy balls used in the process have a diameter of 10 mm, a ball-to-material ratio of 8:1, mixed ball mills for 8 hours, and then sieved on a vibrating sieve with an aperture of 150 μm. Then, the above-mentioned mixed powder of titanium carbide, titanium nitride and molybdenum powder and tungsten carbide powder were mixed in a mixer. The diameter of the alloy ball in the mixer was 10 mm, the ratio of ball to material was 10:1, and the mixing ball milled for 64 hours.

[0058] Put the prepared charge into the graphite boat for compaction, then put it into the vacuum carbonization furnace, st...

Embodiment 3

[0066] Weigh 450g of TiC powder, 100g of TiO powder, 80g of Mo powder, 100g of WC powder, 50g of NbC powder, 50g of TaC and 20g of Cr 3 C 2 pink. Put titanium carbide powder in a graphite boat and compact it, then put it into a vacuum sintering furnace for purification, the purified massive titanium carbide is crushed by a crusher, and then put into a dry ball mill for ball milling. The alloy used in the ball milling process The diameter of the ball is 10 mm, the ratio of ball to material is 10:1, mixed and ball milled for 10 h, and then sieved on a vibrating sieve with an aperture of 150 μm. The above-mentioned titanium carbide, titanium oxide powder and molybdenum powder were mixed in a mixer. The diameter of the alloy ball in the mixer was 6.25 mm, the ratio of ball to material was 10:1, and the mixing ball milled for 72 hours.

[0067] Put the prepared charge into the graphite boat for compaction, then put it into the vacuum carbonization furnace, start the vacuum pump, ...

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Abstract

The invention relates to the technical field of materials of solid solution alloy powder used for cermet, in particular to the solid solution alloy powder used for the cermet and a preparation method.The main chemical formula of the solid solution alloy powder used for the cermet provided by the invention is (Ti, M) (C, N), wherein M is any one or consists of more than one of main active metal elements: W, Mo, Mn, Ta, Nb, Cr, V, Zr and Re; and the solid solution alloy powder comprises the following components: 10-50 % of main active metal M, 8.5-12.5 % of Ct, 8.5-12.5 % of N, not greater than0.35 % of Cf and the balance alloy element Ti. The preparation method provided by the invention overcomes the defects that high sintering temperature is needed in a sintering process when single-phase compound powder is added as a raw material traditionally and the bonding bone phase of cermet alloy is incomplete at the stage of forming a liquid-phase sintering solid solution; each active elementof the alloy is added as the solid solution in the raw material, so that the final cermet performance can be effectively reinforced; and the production technology is simple and easy to control, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of material preparation of solid solution alloy powders for cermets, in particular to a preparation method of solid solution alloy powders for cermets. Background technique [0002] The history of the development of cutting processing technology is essentially a process of introducing new types of tool materials. From the initial raw materials such as tool steel, high-speed steel, and cemented carbide to the innovation of the application of cermets and superhard materials, the cutting speed of machine tools has changed from The increase from a few meters per minute to hundreds of meters per minute has witnessed the overall progress in the development of tool materials. In the 1950s, TiC-Mo-Ni cermet was first used as a tool material for high-speed precision cutting of steel. It has high strength and high hardness comparable to cemented carbide. In order to improve the toughness of cermets and improve their ...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/04C22C1/05C22C29/04C22C1/10
CPCB22F9/04C22C29/04C22C29/005C22C1/058B22F2009/043B22F1/142B22F1/10
Inventor 董定乾杨伟向新
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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