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Stainless steel material and manufacturing method thereof

A technology of stainless steel and austenitic stainless steel, which is applied in the field of stainless steel materials and its manufacture, and can solve problems such as the difficulty in smelting nitrogen-containing stainless steel and the proportion of nitrogen added in stainless steel not meeting the design requirements.

Active Publication Date: 2013-10-30
CENT IRON & STEEL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0022] The second technical problem to be solved by the present invention is to provide a method for smelting high-nitrogen steel in a pressurized induction furnace in view of the defects in the prior art that the smelting of nitrogen-containing stainless steel is difficult and the proportion of nitrogen added in stainless steel cannot meet the design requirements

Method used

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  • Stainless steel material and manufacturing method thereof
  • Stainless steel material and manufacturing method thereof
  • Stainless steel material and manufacturing method thereof

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Embodiment 1

[0143] The stainless steel material is a Cr-Mn-N austenitic stainless steel in which nitrogen is substituted for nickel, and the stainless steel material comprises the following components in weight percentage:

[0144] Cr: 18%; Mn: 14%; N: 0.4%; C: 0.1%.

Embodiment 2

[0146] The stainless steel material is a Cr-Mn-N austenitic stainless steel in which nitrogen is substituted for nickel, and the stainless steel material comprises the following components in weight percentage:

[0147] Cr: 22%; Mn: 17%; N: 0.75%; C: 0.12%.

Embodiment 3

[0149] The stainless steel material is a Cr-Mn-N austenitic stainless steel in which nitrogen is substituted for nickel, and the stainless steel material comprises the following components in weight percentage:

[0150] Cr: 18%; Mn: 14%; N: 0.4%; C: 0.1%; S: 0.02%; P: 0.025%; Si: 0.8%; Cu: 0.2%; Al: 0.01%; and Fe.

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Abstract

The invention discloses a stainless steel material and a manufacturing method of the stainless steel material. The stainless steel material is Cr-Mn-N austenitic stainless steel which takes nitrogen to replace nickel. The manufacturing method comprises the following steps: a smelting method, a blank pressing method and a machining method. The smelting method mainly adopts two alloyed nitrogen increasing methods using a solid nitrogen-containing material and gas-state nitrogen to smelt high-nitrogen steel. The blank pressing method mainly circularly carries out blank punching treatment, heat treatment and solution treatment and controls temperature-preservation temperature and temperature-preservation time; and the selection of a mould mainly depends on a hardness value and an impact toughness value. The machining method mainly controls suitable machining parameters of milling and turning. The stainless steel material and the manufacturing method of the stainless steel material have the beneficial effects that the stainless steel material is the novel austenitic stainless steel; the smelting method is suitable for smelting the high-nitrogen steel with the nitrogen content of 0.4-0.75wt% in a large batch; the blank pressing method inhibits a cold hardening phenomenon of a high-nitrogen steel machining process and is good for pressing a blank; and the machining method overcomes the problem that the machining difficulty of the high-nitrogen steel is great due to great rigidity.

Description

technical field [0001] The invention relates to stainless steel and its smelting and processing methods, more specifically, to a stainless steel material and its manufacturing method. Background technique [0002] 1. Significance of using high nitrogen steel [0003] Stainless steel is a steel that is not easy to rust. The stainless steel and corrosion resistance of stainless steel are due to the chromium-rich oxide film (passive film) on its surface. Because stainless steel has a series of characteristics such as excellent corrosion resistance, formability, compatibility, and strength and toughness in a wide temperature range, it has been widely used in heavy industry, light industry, daily necessities industry, and architectural decoration industries for its excellent characteristics. Applications are not only functional materials, but also modern structural materials. Stainless steel has the advantages of long life cycle and low cost. It can be 100% recycled and reused....

Claims

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Application Information

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IPC IPC(8): C22C38/38C21C5/52C21D8/00B21D22/02B23P15/00B23C3/00
CPCC21D8/00C22C38/06C21D6/002C22C38/02B21D22/02C22C38/38C22C38/20B23C3/00C21C5/52C21C7/0685C22C38/001B23P15/00C22C38/32
Inventor 郎宇平李北邢长军鲍贤勇孙绍华翁建寅姚春发唐海元陈海涛曹呈祥吴林宁小智屈华鹏
Owner CENT IRON & STEEL RES INST
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