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Method for preparing high hardness, high strength and toughness iron-based wear-resistant material by secondary alloying

A wear-resistant material, high strength and toughness technology, applied in the field of powder metallurgy, can solve the problems of high price of inlaid hard alloy block, low hardness of inlaid cast anti-wear white cast iron block, etc.

Active Publication Date: 2017-12-15
嘉禾县飞恒合金铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, in GB / T26652-2011 "wear-resistant composite material castings", the inlaid and cast hard alloy block is expensive, and the inlaid cast anti-wear white cast iron block has low hardness (only HRC56) and other issues

Method used

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  • Method for preparing high hardness, high strength and toughness iron-based wear-resistant material by secondary alloying

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Embodiment

[0035] The pre-alloyed powder prepared by the present invention accounts for 90% to 93% of the total mass of the alloy, and the powder required for the second alloying accounts for 10% to 7% of the total mass of the alloy, totaling 100%; wherein the first alloying The mass percent content of the obtained pre-alloyed powder components is: Cr 18%-23%, Mo 0.8%-1.8%, Ni 0.6%-1.5%, Ti 0.3%-0.8%, Si 0.4%-1.0%, V 0.6%- 1.2%, C 2.4% to 2.9%, Fe is the balance. The mass percentage of each component in the powder added in the second sintering alloying is: Cu 12%-24%, Ni 12%-20%, Mo 9%-15%, Mn 6%-12%, TiC 15% ~25%, Fe is the balance; TiC particle size is less than 0.5μm, Mn is added as MnFe master alloy powder.

[0036] The implementation process of the first alloying to produce pre-alloyed powder is to calculate the content of each component according to the above mass percentage, then weigh it, add it to an intermediate frequency induction furnace for melting, and after the melting is...

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Abstract

The invention discloses a method for preparing a high-hardness high-strength-and-toughness iron-based wear resistant material through secondary alloying. The method comprises the following steps: (1) smelting raw materials, and then preparing alloy powder A through a water mist method, wherein the alloy powder A contains the following elements in percentage by mass: 18-23% of Cr, 0.8-1.8% of Mo, 0.6-1.5% of Ni, 0.3-0.8% of Ti, 0.4-1.0% of Si, 0.6-1.2% of V, 2.4-2.9% of C and the balance of Fe; and (2) performing ball milling on 7-10 parts by mass of powder B and 90-93 parts by mass of alloy powder A, mixing, adding a forming agent to prepare a blank, and sintering to obtain the iron-based wear resistant material, wherein the powder B comprises the following components in percentage by mass: 12-24% of Cu, 12-20% of Ni, 9-15% of Mo, 6-12% of Mn, 15-25% of TiC and the balance of Fe. The iron-based wear resistant material disclosed by the invention has favorable physical and mechanical properties, and reaches the technical standard of a corresponding designation of an industrial steel bond hard alloy.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to the preparation of high-hardness, high-strength and toughness iron-based wear-resistant materials by secondary alloying. Background technique [0002] For wear-resistant structural materials used under the conditions of impact contact friction and wear, there has been no report on the use of iron-based powder metallurgy wear-resistant materials. For example, in GB / T14667.1-93 National Standard "Powder Metallurgy Iron-Based Structural Materials", grades with high strength and impact toughness and grades with low hardness have very low hardness values ​​and are not classified as wear-resistant materials. kind. In the book "Liquid Phase Sintered Powder Metallurgy Materials", edited by Guo Gengchen and published by Chemical Industry Press in 2003, in the sixth chapter "Liquid Phase Sintering of Iron-based Powder Metallurgy", no information about the preparation of high har...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/44C22C38/50C22C38/46C22C38/56C22C38/02C22C38/42C22C38/04C22C33/02
CPCC22C33/0292C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/50C22C38/56
Inventor 张春友张震宇
Owner 嘉禾县飞恒合金铸造有限公司