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Method for in-situ integrated preparation of Ti (C, N)-based metal ceramic cutter material with high heat resistance

A technology of ceramic knives and cermets, which is applied to other manufacturing equipment/tools, engine components, turbines, etc., can solve the problems of reducing the strength and toughness of materials, easily causing chipping, and rapid failure, and achieve dense grain structure distribution and realization Industrial application, good overall performance

Active Publication Date: 2021-05-04
LIFENG PRECISION TOOLS (ZHEJIANG) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can improve the heat resistance of cermets, it reduces the strength and toughness of the material, and it is easy to fail quickly during cutting
China Patent No. 201810822205.6 uses rare earth elements NbC, VC, etc. as additives to obtain Ti(C,N)-based cermets with high thermal shock resistance and cutting performance through vacuum / pressure sintering, but the heat resistance is limited.
In the above patents, although microwave sintering and spark plasma sintering can improve the strength and toughness of cermets, the density of the produced materials is not high, and it is easy to cause chipping and other phenomena.

Method used

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  • Method for in-situ integrated preparation of Ti (C, N)-based metal ceramic cutter material with high heat resistance
  • Method for in-situ integrated preparation of Ti (C, N)-based metal ceramic cutter material with high heat resistance
  • Method for in-situ integrated preparation of Ti (C, N)-based metal ceramic cutter material with high heat resistance

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Embodiment 1

[0029] A method for preparing Ti(C,N)-based cermet cutting tool materials in situ with high heat resistance, comprising the following steps:

[0030] Step 1: Preparation of nanocrystalline AlCoCrFeNiTi high-entropy alloy powder: Weigh various raw material powders, according to atomic percentage Al: Co: Cr: Fe: Ni: Ti = 1: 1: 1: 1: 1: 1; The raw materials were subjected to mechanical planetary ball milling, the ball milling medium was cemented carbide balls, the ball-to-material ratio was 1:10, the ball milling speed was 300r / min, and the ball milling time was 40h. A total mass of 5wt% n-heptane was added into the ball mill as a process control agent, and the mill was shut down every 5 hours, with an interval of 30 minutes between shutdowns. In addition, 0.05MPa of Ar gas is introduced for protection after the powder is filled into the tank. Sieve through a 270-mesh sieve after ball milling.

[0031] Step 2: Carry out the proportioning and mixing of reaction raw materials; th...

Embodiment 2

[0038] A method for preparing Ti(C,N)-based cermet cutting tool materials in situ with high heat resistance, comprising the following steps:

[0039] Step 1: Nanocrystalline Al 0.3 Preparation of CoCrFeNiTi high-entropy alloy powder: Weigh various raw material powders, according to atomic percentage Al: Co: Cr: Fe: Ni: Ti = 0.3: 1: 1: 1: 1: 1; Type ball mill, the ball milling medium is cemented carbide balls, the ball-to-material ratio is 1:10, the ball milling speed is 250r / min, and the ball milling time is 24h. Add 10wt% n-heptane in the ball mill as a process control agent, and shut down the mill every 5 hours with an interval of 30 minutes. In addition, 0.05MPa of Ar gas is introduced for protection after the powder is filled into the tank. Sieve through a 270-mesh sieve after ball milling.

[0040] Step 2: Carry out the proportioning and mixing of the reaction raw materials; the components included in the reaction raw materials and the weight percentages of each compon...

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Abstract

The invention discloses a method for in-situ integrated preparation of a Ti (C, N)-based metal ceramic cutter material with high heat resistance, and belongs to the technical field of novel metal ceramic materials. The method comprises the following steps that 1) nanocrystalline AlxCoCrFeNiTi high-entropy alloy binding phase powder is prepared; 2) reaction raw materials are subjected to proportioning and mixing, and a Ti (C, N)-TiB2-AlxCoCrFeNiTi metal ceramic mixture is prepared; 3) a cutter mixed green body is prepared; and 4) the cutter mixed green body is placed in an atmosphere sintering furnace to be fired into a cutter sample. The Ti (C, N)-based composite metal ceramic material prepared through the method has a Ti (C, N) and TiB2 double 'core-ring ' structure, is compact and uniform in grain structure distribution, can be used for efficient machining of high-strength and other difficult-to-cut materials, and achieves industrial application of cutters.

Description

technical field [0001] The invention belongs to the technical field of new cermet materials, and specifically relates to an in-situ integrated preparation of Ti(C,N)-TiB used in severe environments such as high-strength structural steel cutting with high temperature and high speed. 2 -Al x CoCrFeNiTi cermet tool material method. Background technique [0002] In recent years, my country's aviation industry and heavy machinery manufacturing industry have achieved rapid development. They have shifted from purely relying on foreign technology to independent innovation, and from purely relying on purchase to independent design and manufacturing. As an important component in the manufacturing process, it requires materials with high reliability, good strength and toughness, and certain corrosion resistance. High-strength steels such as 15-5PH martensitic precipitation-hardening stainless steel, 1Cr18Ni9Ti stainless steel, and 69111 stainless steel have excellent mechanical prope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/00B22F9/04B22F3/04B22F3/14C22C1/05C22C29/04
CPCC22C1/058B22F5/00B22F9/04B22F3/04B22F3/14C22C29/005C22C29/04B22F2005/001B22F2009/041B22F2009/043
Inventor 方一航张梦贤赵先锐程虎陈基根吴建波霍颜秋薛双喜张平王天乐
Owner LIFENG PRECISION TOOLS (ZHEJIANG) CO LTD
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