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Heat treatment process of antimicrobial martensitic stainless steel

A technology of martensitic stainless steel and stainless steel, applied in the field of iron and steel materials, can solve problems such as complicated process, increased steelmaking cost, and difficulty in mastering the best ingredients, and achieve excellent comprehensive performance, no decline in antibacterial performance, good mechanical properties and durability The effect of corrosion performance

Inactive Publication Date: 2014-03-26
WUXI XINDAZHONG STEEL SHEET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent publication CN1789471A discloses a kind of austenitic antibacterial stainless steel, this antibacterial stainless steel is to add 0.1~10% (weight) Cu-Ag-Zn ternary intermediate alloy in common 300 series austenitic stainless steel, but Cu- The optimal composition of the Ag-Zn ternary master alloy is not easy to grasp, and Zn will have an adverse effect on the hot workability of stainless steel. In addition, the antibacterial stainless steel needs to undergo water quenching heat treatment, and the process is relatively complicated.
[0006] Chinese Patent Publication CN1664154A also discloses a kind of austenitic antibacterial stainless steel, whose N content reaches 0.06-0.3%, which increases the cost of steelmaking, and its Cu content is 1.0-3.0%, which needs water quenching and aging treatment , complex process

Method used

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Embodiment 1

[0014] A heat treatment process for antibacterial martensitic stainless steel, the stainless steel is composed of the following components by weight percentage: C: 0.1%, Si: 1.4%, Mn: 1.6%, Cr: 16%, Ni: 1.5%, Cu: 2.0%, Ag: 0.5%, Nb: 1.4%, Ti: 0.3%, W: 1.4%, Mo: 3.4%, the balance is Fe and unavoidable impurities; at the same time, the matrix of the antibacterial martensitic stainless steel The nano-scale precipitated phase ε~Cu is evenly dispersed and distributed; the heat treatment process is: after the antibacterial martensitic stainless steel is hot-rolled and cold-rolled, it is firstly subjected to solution treatment and then aging treatment; the specific solution treatment The process is: first keep warm at 1130°C for 2.5 hours, and then air cool to room temperature; the specific aging treatment process is: keep warm at 570°C for 10 hours, then air cool to room temperature; then perform quenching and tempering treatment, the process is: first Heat at 1050°C for 2.5 hours, ...

Embodiment 2

[0016] A heat treatment process for antibacterial martensitic stainless steel, the stainless steel is composed of the following components by weight percentage: C: 0.3%, Si: 1.2%, Mn: 1.8%, Cr: 14%, Ni: 1.7%, Cu: 1.6%, Ag: 0.7%, Nb: 1.2%, Ti: 0.5%, W: 1.2%, Mo: 3.6%, the balance is Fe and unavoidable impurities; at the same time, the matrix of the antibacterial martensitic stainless steel The nano-scale precipitated phase ε~Cu is evenly dispersed and distributed; the heat treatment process is: after the antibacterial martensitic stainless steel is hot-rolled and cold-rolled, it is firstly subjected to solution treatment and then aging treatment; the specific solution treatment The process is: first keep warm at 1150°C for 1.5 hours, then air cool to room temperature; the specific aging treatment process is: keep warm at 590°C for 8 hours, then air cool to room temperature; then perform quenching and tempering treatment, the process is: first Heat at 1070°C for 1.5 hours, cool ...

Embodiment 3

[0018] A heat treatment process for antibacterial martensitic stainless steel, the stainless steel is composed of the following components by weight percentage: C: 0.2%, Si: 1.3%, Mn: 1.7%, Cr: 15%, Ni: 1.6%, Cu: 1.8%, Ag: 0.6%, Nb: 1.3%, Ti: 0.4%, W: 1.3%, Mo: 3.5%, the balance is Fe and unavoidable impurities; at the same time, the matrix of the antibacterial martensitic stainless steel The nano-scale precipitated phase ε~Cu is evenly dispersed and distributed; the heat treatment process is: after the antibacterial martensitic stainless steel is hot-rolled and cold-rolled, it is firstly subjected to solution treatment and then aging treatment; the specific solution treatment The process is: first keep warm at 1140°C for 2.0 hours, and then air cool to room temperature; the specific aging treatment process is: keep warm at 580°C for 9 hours, then air cool to room temperature; then perform quenching and tempering treatment, the process is: first Heat at 1060°C for 2 hours, coo...

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Abstract

The invention discloses a teat treatment process of antimicrobial martensitic stainless steel. The stainless steel comprises the following components in percentage by weight: 0.1-0.3% of C, 1.2-1.4% of Si, 1.6-1.8% of Mn, 14-16% of Cr, 1.5-1.7% of Ni, 1.6-2.0% of Cu, 0.5-0.7% of Ag, 1.2-1.4% of Nb, 0.3-0.5% of Ti, 1.2-1.4% of W, 3.4-3.6% of Mo and the balance of Fe and inevitable impurities; and meanwhile, a nano level precipitated phase epsilon-Cu is uniformly and dispersedly distributed in a base of the antimicrobial martensitic stainless steel. The heat treatment process comprises the following steps: keeping the temperature at 1130-1150 DEG C for 1.5-2.5 hours, and then performing air cooling to room temperature; keeping the temperature at 570-590 DEG C for 8-10 hours, and performing air cooling to room temperature; keeping the temperature at 1050-1070 DEG C for 1.5-2.5 hours, and performing oil cooling to room temperature; and heating to 430-450 DEG C, keeping the temperature for 5-7 hours, and performing air cooling to room temperature.

Description

technical field [0001] The invention relates to the field of iron and steel materials, in particular to a heat treatment process for martensitic stainless steel. Background technique [0002] Antibacterial stainless steel is a new product researched and developed by combining traditional material science with emerging antibacterial technology. Antibacterial stainless steel has the dual characteristics of both structural materials and functional materials. It not only has the decoration and beautification effect of general stainless steel as a component, but also has the self-cleaning effect of antibacterial and sterilizing. It has been very popular since it was put on the market. It is used in kitchen equipment and food industry. Tables and utensils, medical equipment, tableware and towel hanging racks in daily life, brackets for refrigerators and other fields are fully promoted and used. Some facilities in public places such as bus handrails, stair handrails, telephone boot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D8/00C22C38/58
Inventor 周明华
Owner WUXI XINDAZHONG STEEL SHEET
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