Phase change hardening stainless steel product and manufacturing method of phase change hardening stainless steel product

A technology of phase change hardening and manufacturing method, applied in the field of stainless steel, which can solve the problems of poor corrosion resistance, poor hardness, and large application limitations, and achieve the effects of good corrosion resistance, good ductility, and high hardness

Active Publication Date: 2022-01-21
KUNSHAN KADAM NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] As a kind of stainless steel, 3XX series stainless steel has the characteristics of good corrosion resistance, good ductility, and non-magnetic in solid solution state. It is widely used in 3C products, heat exchange equipment, dyeing equipment, film washing equipment, pipelines, and contact with seawater. However, in order to maintain the Ossite phase, 3XX series stainless steel is added with Cr, Ni, Mo and other components, making its hardness poor, generally around HV (Vickers hardness) 120-140
[0004] As another stainless steel, 17-4PH stainless steel has high mechanical strength and good hardness characteristics. Its hardness exceeds HV200, and it can reach HV430 after aging heat treatment, but its corrosion resistance is not good, and its application is limited.

Method used

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  • Phase change hardening stainless steel product and manufacturing method of phase change hardening stainless steel product
  • Phase change hardening stainless steel product and manufacturing method of phase change hardening stainless steel product
  • Phase change hardening stainless steel product and manufacturing method of phase change hardening stainless steel product

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Experimental program
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Effect test

Embodiment 1

[0097] Evenly mix 304L stainless steel powder with a d90 of 20-25um and 1wt% superfine zirconia powder with a d90 of 1um, then mix it with a polymer binder in proportion, and then granulate it with a banbury mixer to make granules Feed the material, and then make the green embryo by injection molding, then carry out catalytic degreasing, and then carry out high-temperature sintering at 1360°C in the vacuum environment provided by the vacuum furnace, and obtain a density of 7.72g / cm after cooling 3 , the intermediate product with a hardness of HV139, and then heat the intermediate product to 1300°C in the vacuum environment provided by the vacuum furnace for heat treatment, and obtain a phase transformation hardened stainless steel product with a hardness of HV208 after cooling. This product has good corrosion resistance, ductility Good performance, non-magnetic, high hardness, high wear resistance, can be used in extreme environments.

Embodiment 2

[0099] Embodiment two is basically the same as embodiment one, the difference is that in embodiment two,

[0100] The proportion of ultra-fine zirconia powder is increased to 4wt%, and the density of the intermediate product made is 7.75g / cm 3 , the hardness is HV168, and the hardness of the final transformation hardened stainless steel product is HV275.

Embodiment 3

[0102] Embodiment 3 is basically the same as Embodiment 1, except that in Embodiment 3, the proportion of ultrafine zirconia powder is increased to 9wt%, and the density of the intermediate product made is 7.54g / cm 3 , the hardness is HV192, and the hardness of the final transformation hardened stainless steel product is HV353.

[0103] In this embodiment, in order to avoid the situation that it is difficult to process due to excessive hardness during the subsequent processing of phase transformation hardened stainless steel products, after the intermediate products are made, the shape and size of the intermediate products are processed according to the requirements. Heat treatment is carried out so that the shape and size of the final phase transformation hardened stainless steel product meet the requirements.

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Abstract

The invention provides a phase change hardening stainless steel product. The phase change hardening stainless steel product comprises a 3XX series stainless steel base material and zirconia ceramic powder evenly distributed in the base material. The d90 particle size of the ceramic powder is made to be smaller than 5 micrometers so that the proportion of the ceramic powder can be 0.03 wt%-30 wt%, adjacent crystals of the base material are in a mutual extrusion state, pre-stress is formed in the base material, hardness is improved, the stainless steel product not only can retain the characteristics of corrosion resistance, no magnetism and good ductility of 3xx series stainless steel, but also can have the characteristic of high hardness greater than or equal to HV200, has the advantages of the 3xx series stainless steel and 17-4PH stainless steel, and can be used in an extreme environment. The manufacturing method of the phase change hardening stainless steel product is simple in process, high in yield and easy to implement, stainless steel products of various complex shapes can be conveniently and rapidly manufactured, the application range is wide, and the manufactured phase change hardening stainless steel product has the characteristics of being good in corrosion resistance, good in ductility, free of magnetism, high in hardness and high in abrasion resistance, and can be used in an extreme environment.

Description

technical field [0001] The present application relates to the technical field of stainless steel, in particular to a phase transformation hardening stainless steel product and a manufacturing method of the phase transformation hardening stainless steel product. Background technique [0002] Stainless steel refers to steel resistant to weak corrosive media such as air, steam, water, and chemically corrosive media such as acid, alkali, and salt. It is also called stainless acid-resistant steel. [0003] As a kind of stainless steel, 3XX series stainless steel has the characteristics of good corrosion resistance, good ductility, and non-magnetic in solid solution state. It is widely used in 3C products, heat exchange equipment, dyeing equipment, film washing equipment, pipelines, and contact with seawater. However, in order to maintain the Ossite phase, 3XX series stainless steel is added with Cr, Ni, Mo and other components, making its hardness poor, generally around HV (Vic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/02B22F1/12B22F3/10B22F3/22B22F3/24C22C32/00C22C38/14
CPCC22C32/0026C22C33/006C22C33/0257C22C33/0278B22F3/225B22F3/1021B22F3/24C22C38/14B22F2003/248
Inventor 侯春树侯咏轩侯文洁
Owner KUNSHAN KADAM NEW MATERIAL TECH CO LTD
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