Martensite stainless steel and preparation method for flat strip of martensite stainless steel

A martensitic stainless steel and flat strip technology, applied in the field of stainless steel materials, can solve the problems of large diameter-to-thickness ratio, strict size requirements, high strength and hardness requirements

Active Publication Date: 2011-11-23
CHONGQING MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Because the materials used in this type of flat belt need special smelting and wire flattening and cold rolling processing, the requirements

Method used

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  • Martensite stainless steel and preparation method for flat strip of martensite stainless steel
  • Martensite stainless steel and preparation method for flat strip of martensite stainless steel
  • Martensite stainless steel and preparation method for flat strip of martensite stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] A martensitic stainless steel, the chemical composition of which is calculated by weight percentage: C: 0.049%; Si: 0.35%; Mn: 1.11%; Ni: 8.59%; Cr: 18.09%; Ti: 0.60%; P≤0.009% ; S≤0.009%; the balance is Fe.

[0079] The method for preparing a flat strip with the above-mentioned martensitic stainless steel comprises the following steps:

[0080] a) Weigh each chemical component by weight percentage;

[0081] According to the nickel-chromium equivalent law, through the design and analysis of each chemical element composition, the ingredients are prepared according to the weight percentage of each chemical composition;

[0082] b), vacuum induction melting;

[0083] Vacuum induction melting adopts secondary refining process;

[0084] The first refining is at a temperature of 1530±5°C, the vacuum degree is controlled at 1Pa, and refining is performed for 20 minutes;

[0085] The second refining is at a temperature of 1530±5°C, the vacuum degree is controlled at 0.1Pa, ...

Embodiment 2

[0101] A martensitic stainless steel whose chemical composition is calculated by weight percentage: C: 0.02; Si: 0.3; Mn: 1.0; Ni: 8.5; Cr: 17.5%; Ti: 0.4; P≤0.009%; S≤0.009% ; The balance is Fe.

[0102] The method for preparing a flat strip with the above-mentioned martensitic stainless steel comprises the following steps:

[0103] a) Weigh each chemical component by weight percentage;

[0104] According to the nickel-chromium equivalent law, through the design and analysis of each chemical element composition, the ingredients are prepared according to the weight percentage of each chemical composition;

[0105] b), vacuum induction melting;

[0106] Vacuum induction melting adopts secondary refining process;

[0107] The first refining is at a temperature of 1560±5°C, the vacuum degree is controlled at 6Pa, and refining is performed for 10 minutes;

[0108] The second refining is at a temperature of 1560±5°C, the vacuum degree is controlled at 0.02Pa, and the refining i...

Embodiment 3

[0124] A martensitic stainless steel, the chemical composition of which is calculated by weight percentage: C: 0.06%; Si: 0.5%; Mn: 1.5%; Ni: 9.0%; Cr: 18.5%; Ti: 0.6%; P≤0.009% ; S≤0.009%; the balance is Fe.

[0125] The method for preparing a flat strip with the above-mentioned martensitic stainless steel comprises the following steps:

[0126] a) Weigh each chemical component by weight percentage;

[0127] According to the nickel-chromium equivalent law, through the design and analysis of each chemical element composition, the ingredients are prepared according to the weight percentage of each chemical composition;

[0128] b), vacuum induction melting;

[0129] Vacuum induction melting adopts secondary refining process;

[0130] The first refining is at a temperature of 1540±5°C, the vacuum degree is controlled at 3Pa, and refining is performed for 15 minutes;

[0131] The second refining is at a temperature of 1540±5°C, the vacuum degree is controlled at 0.06Pa, and t...

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Abstract

The invention discloses martensite stainless steel and preparation method for flat strips of martensite stainless steel. The martensite stainless steel comprises following chemical components by weight percentage: C 0.02 to 0.06%, Si 0.3 to 0.5%, Mn 1.0 to 1.5%, Ni 8.5 to 9.0%, Cr 17.5 to 18.5%, Ti 0.4 to 0.6%, P no more than 0.009% and S no more than 0.009%, with the balance being Fe. The preparation method for flat strips of the martensite stainless steel comprises the following steps: a) weighing above-mentioned chemical components at desired weight percentage; b) carrying out vacuum induction melting; c) carrying out casting to obtain remelt electrode bars; d) carrying out electroslag remelting to obtain steel ingots; e) forging steel ingots into billets; f) processing billets into round strips; g) carrying out solid solution treatment; h) drawing treated blanks into wires; i) preparing flat strips. According to the invention, equivalents of nickel and chromium are strictly controlled, the ratio of C to Ti and alloy elements are optimized, EVR smelting is carried out and such alloying elements as C, Si, Mn and Ti are added, thereby enabling formation of a metastable austenite structure; a predeformed phase-changed martensite wire material is obtained by wire drawing; and the ultra high strength deformed flat strips of martensite stainless steel are obtained by flat strip rolling.

Description

technical field [0001] The invention relates to a stainless steel material, in particular to a preparation method of a martensitic stainless steel and a stainless steel flat strip. Background technique [0002] Metastable austenitic stainless steel deformation-induced martensitic steel flat strip is a kind of martensitic steel, which means that metastable austenite produces martensite through casting and forging and deformation. The obtained martensitic stainless steel wire is cold-rolled to obtain an ultra-high-strength deformed martensitic steel flat strip. The flat belt is of great significance for high-strength and low-cost elastic elements, shape memory alloys and structural materials required by the automotive industry, petrochemical industry, aviation industry, aerospace, and biomedicine. In recent years, with the rapid development of cutting-edge technology, there are new requirements for high-performance equipment and machines, which in turn have higher requirement...

Claims

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Application Information

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IPC IPC(8): C22C38/50C22C33/04C22B9/18C21D8/06
CPCY02P10/25
Inventor 张十庆李方王宏邹兴政聂尊誉刘庆宾王东哲
Owner CHONGQING MATERIALS RES INST
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