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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 for strength and hardness are high, the size requirements are strict, and the ratio of diameter to thickness is large, which is still blank in China.

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

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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