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High-hardness stainless steel as well as preparation method and application thereof

A technology of stainless steel and high hardness, applied in the field of stainless steel materials, can solve the problems of low hardness and achieve the effects of improving mechanical properties, improving segregation, improving wear resistance and service life

Active Publication Date: 2021-11-19
AVIC SHANGDA METAL REGENERATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defect of low hardness in the existing martensitic precipitation-hardening stainless steel materials for molds, the present invention provides a high-hardness stainless steel and its preparation method and application

Method used

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  • High-hardness stainless steel as well as preparation method and application thereof
  • High-hardness stainless steel as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The present embodiment provides a kind of high hardness stainless steel, and its preparation method is as follows:

[0036] (1) Vacuum induction melting: dosing according to the chemical composition requirements of high hardness stainless steel (calculate the amount of each raw material added); melt each raw material at 1500-1510°C, and then refine at 1550-1560°C, 1-5Pa for 60min ; Then carry out sampling and analysis of all elements, according to the requirements of the components in high-hardness stainless steel, add raw materials according to the analysis results, adjust the components, so that the content of each element reaches the range required by the components in high-hardness stainless steel. Melted in a vacuum induction furnace to form mold steel molten steel for plastics;

[0037] (2) Pouring: pour the plastic mold steel molten steel prepared in step (1) at 1540-1550°C at a pouring speed of 300kg / min into a plastic mold steel electrode billet (250mm in diame...

Embodiment 2

[0043] The present embodiment provides a kind of high hardness stainless steel, and its preparation method is as follows:

[0044](1) Vacuum induction melting: dosing according to the chemical composition requirements of high hardness stainless steel (calculate the amount of each raw material added); melt each raw material at 1520-1530°C, and then refine at 1560-1570°C and 1-5Pa for 120min ; Then carry out sampling and analysis of all elements, according to the requirements of the components in high-hardness stainless steel, add raw materials according to the analysis results, adjust the components, so that the content of each element reaches the range required by the components in high-hardness stainless steel. Melted in a vacuum induction furnace to form mold steel molten steel for plastics;

[0045] (2) Pouring: pour the plastic mold steel molten steel prepared in step (1) at 1550-1560°C at a pouring speed of 200kg / min into a plastic mold steel electrode billet (250mm in di...

Embodiment 3

[0051] The present embodiment provides a kind of high hardness stainless steel, and its preparation method is as follows:

[0052] (1) Vacuum induction melting: dosing according to the chemical composition requirements of high hardness stainless steel (calculate the amount of each raw material added); melt each raw material at 1540-1550°C, and then refine at 1580-1590°C and 1-5Pa for 90min ; Then carry out sampling and analysis of all elements, according to the requirements of the components in high-hardness stainless steel, add raw materials according to the analysis results, adjust the components, so that the content of each element reaches the range required by the components in high-hardness stainless steel. Melted in a vacuum induction furnace to form mold steel molten steel for plastics;

[0053] (2) Pouring: pour the plastic mold steel molten steel prepared in step (1) at 1530-1540°C at a pouring speed of 260kg / min into a plastic mold steel electrode billet (250mm in di...

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Abstract

The invention provides high-hardness stainless steel as well as a preparation method and application thereof. The high-hardness stainless steel is prepared from the components including, by mass, less than or equal to 0.05% of C, less than or equal to 0.50% of Mn, less than or equal to 0.50% of Si, less than or equal to 0.03% of P, 0.02%-0.03% of S, 11.50%-13.5% of Cr, 9.00%-11.00% of Ni, 1.5%-2.5% of Mo, 1.50%-2.80% of Al, less than or equal to 0.01% of N, less than or equal to 0.01% of O and the balance Fe and inevitable impurities. According to the high-hardness stainless steel, segregation of chemical components, segregation of carbides and the homogeneous texture in the stainless steel can be effectively improved through strict control on the contents of all the elements and mutual matching of all the elements, and then the mechanical property of the stainless steel is remarkably improved.

Description

technical field [0001] The invention relates to the field of stainless steel materials, in particular to a high-hardness stainless steel and its preparation method and application. Background technique [0002] Martensitic precipitation hardening stainless steel is a martensitic stainless steel that is further strengthened by adding copper, molybdenum, titanium, aluminum and other elements to precipitate carbides and intermetallic compounds on the basis of nickel-chromium steel. It is widely used in medical devices , corrosive plastic products and rubber products and other molds. [0003] The commonly used martensitic precipitation hardening stainless steel mold is 0Cr17Ni4Cu4Nb, and its common chemical composition is as follows by mass percentage: carbon (C) ≤ 0.07%, manganese (Mn) ≤ 1.00%, silicon (Si) ≤ 1.00%, phosphorus ( P)≤0.023%, sulfur (S)≤0.03%, chromium (Cr) 15.50%-17.50%, nickel (Ni) 3.00%-5.00%, copper (Cu) 3.00%-5.00%, niobium (Nb) 0.15% -0.45%, the rest is ir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/44B21J5/00C21D8/00C22B9/20C22C33/04
CPCC22C38/04C22C38/02C22C38/44C22C38/06C22C33/04C22B9/20B21J5/002C21D8/005
Inventor 刘军凯栾吉哲李青孙海涛叶强韦鑫
Owner AVIC SHANGDA METAL REGENERATION TECH
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