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Tool high molybdenum martensitic stainless steel with toughness and corrosion resistance superior to toughness and corrosion resistance of 9Cr18MoV and method

A technology of martensitic stainless steel, 9cr18mov, applied in the field of high-molybdenum martensitic stainless steel and methods for cutting tools whose toughness and corrosion resistance are superior to 9Cr18MoV, which can solve the problems of difficult processing, reduced plasticity and toughness, and increased thermal deformation resistance, etc. question

Inactive Publication Date: 2020-03-27
上大新材料(泰州)研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the content of molybdenum and vanadium in high-carbon martensitic stainless steel is high, coarse carbides (such as M6C) will be formed, which will reduce the ductility and toughness.
In addition, the high content of molybdenum and vanadium will significantly increase the resistance to thermal deformation, making it difficult to process

Method used

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  • Tool high molybdenum martensitic stainless steel with toughness and corrosion resistance superior to toughness and corrosion resistance of 9Cr18MoV and method
  • Tool high molybdenum martensitic stainless steel with toughness and corrosion resistance superior to toughness and corrosion resistance of 9Cr18MoV and method
  • Tool high molybdenum martensitic stainless steel with toughness and corrosion resistance superior to toughness and corrosion resistance of 9Cr18MoV and method

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Embodiment Construction

[0022] Below in conjunction with embodiment and accompanying drawing ( figure 1 ) to illustrate the present invention.

[0023] The purpose of the present invention is to provide a martensitic stainless steel for knives with high hardness, toughness and corrosion resistance, which is used to make high-end knives with high sharpness and high durability. Based on 9Cr18MoMV high-end steel, optimize the composition and content of alloying elements to improve material performance: (1) reduce C and increase Mo, optimize carbide content and size, and improve plastic toughness and corrosion resistance. (2) Increase the content of Mn, expand the austenite phase region, improve the stability of austenite, increase the content of residual austenite, and improve the plasticity and toughness; (3) reduce the content of impurity elements, especially the content of S, and reduce or eliminate MnS inclusions.

[0024] High-molybdenum martensitic stainless steel for cutting tools with toughnes...

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Abstract

The invention discloses a tool high molybdenum martensitic stainless steel with the toughness and corrosion resistance superior to toughness and corrosion resistance of 9Cr18MoV and a method. The highmolybdenum means that the molybdenum content of the steel is increased by at least 90% compared with that of 9Cr18MoV tool steel. According to the steel and the method, the toughness of the steel isimproved by at least 70% compared with that of the 9Cr18MoV tool steel, the corrosion resistance of the steel is improved by at least 14 times compared with that of the 9Cr18MoV tool steel, and the steel is high-end cutter steel, and is suitable for high-end kitchen knives, outdoor knives and the like.

Description

technical field [0001] The invention relates to the technology of martensitic stainless steel for high-end cutting tools, especially a kind of high-molybdenum martensitic stainless steel and method for cutting tools whose toughness and corrosion resistance are superior to 9Cr18MoV. The content of molybdenum in 9Cr18MoV knife steel is increased by at least 90%, the toughness of the steel of the present invention is improved by at least 70% compared with that of 9Cr18MoV knife steel, and the corrosion resistance of the steel of the present invention is improved compared to that of 9Cr18MoV knife steel At least 14 times, the steel of this invention is a high-end knife steel, suitable for high-end kitchen knives, outdoor knives, etc. Background technique [0002] Martensitic stainless steel for high-end cutting tools is mainly high-carbon and high-chromium martensitic stainless steel, such as 440C, S30V, BG-42, 154CM, etc. These high-end knife steels are all foreign and need to...

Claims

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Application Information

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IPC IPC(8): C22C38/22C22C38/04C22C38/24C22C38/26C22C38/02C21D8/02C21D1/18
CPCC21D1/18C21D8/0226C21D8/0236C21D2211/008C22C38/002C22C38/02C22C38/04C22C38/22C22C38/24C22C38/26
Inventor 董瀚赵洪山
Owner 上大新材料(泰州)研究院有限公司
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