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High-dimension stable corrosion-resistant martensite steel and preparation method of steel structural material

A technology of dimensional stability and martensitic steel, applied in the field of metal materials, can solve the problems of poor mechanical properties and machining properties, poor wear resistance, poor toughness, etc., and achieve the effect of excellent performance

Active Publication Date: 2012-06-13
CHONGQING MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although cast austenitic stainless steel has excellent corrosion resistance and is widely used, its mechanical properties and machinability are poor, its wear resistance is not good, and its magnetic permeability is low; while cast ferritic stainless steel has poor room temperature and low temperature toughness, notch High sensitivity and non-wear resistance; Martensitic stainless steel can be divided into three types according to the structure: martensitic, semi-austenitic and martensitic aging

Method used

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  • High-dimension stable corrosion-resistant martensite steel and preparation method of steel structural material
  • High-dimension stable corrosion-resistant martensite steel and preparation method of steel structural material
  • High-dimension stable corrosion-resistant martensite steel and preparation method of steel structural material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] A corrosion-resistant martensitic steel with high dimensional stability, the chemical composition of which is: C: 0.025; Cr: 14.0; Ni: 5.49; Cu: 2.0; Nb: 0.2; Mn: 0.7; Mo: 0.3; Si: 1.0; P ≤ 0.0083; S ≤ 0.0081; the balance is Fe, which is vacuum smelted and then vacuum cast into precision castings, and machined into structural components for instruments with high dimensional stability.

[0079] The preparation method of the above-mentioned high dimensional stability and corrosion-resistant martensitic steel structural material is characterized in that it comprises the following steps:

[0080] 1) Weigh each component according to the weight percentage of each chemical component;

[0081] 2) Vacuum induction melting

[0082] Adding the components weighed in step 1 into a vacuum induction melting furnace for vacuum induction melting, the vacuum induction melting adopts a secondary refining process;

[0083] The first refining is at a temperature of (1530-1560) ±5°C, the ...

Embodiment 2

[0096] Others are the same as in Example 1, except that the steel ingots are first forged into square billets with cross-sectional side lengths of 40mm, 60mm, and 80mm, and then surface-finished and hot-rolled into round bars of φ8-φ14mm, which are also wire rod blanks.

[0097] Use flaw detection equipment to test the internal and external quality of the wire rod blank, and use a finishing device for finishing;

[0098] After surface finishing and hot rolling into φ8~φ14mm round wire bar blanks, after finishing and flaw detection, solution heat treatment is carried out at 1040±5°C, and heat preservation is carried out according to the thickness of the wire material; the deformation degree of the wire material is controlled At 40-65%, the deformation of finished silk is controlled at 30-40%;

[0099] The finished and flaw-detected wire rod blanks are further cold-processed into φ2mm, φ1mm, φ0.5 mm, and φ0.25 mm respectively to obtain high dimensional stability and corrosion-re...

Embodiment 3

[0103] Others are the same as embodiment 1, just that the blank of the plate and strip is forged into a width that is respectively 300 mm, 350 mm, 400 mm wide and 30 mm thick, to obtain the slab of the plate and strip;

[0104] Use flaw detection equipment to test the internal and external quality of the blank of the plate and strip, and use a finishing instrument for finishing;

[0105]The finished and flaw-detected plate and strip blanks are further cold-processed to obtain high-dimensional stability and corrosion-resistant martensitic steel structure materials.

[0106] The high dimensional stability and corrosion-resistant martensitic steel structure material is a hot-rolled plate, and the slab after finishing and flaw detection is hot-rolled at a temperature of (850-1160) ± 5°C to a width of 320-440 mm, 8 ~10 thick slabs; and then carry out solution treatment. The method of solution treatment is to hold the temperature for 30-60 minutes at a temperature of 1040±10°C, and ...

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Abstract

The invention discloses a high-dimension stable corrosion-resistant martensite steel and a preparation method of a steel structural material. The martensite steel comprises the following chemical components of: C being less than or equal to 0.10, Cr being 14.0-15.5, Ni being 4.2-6.0, Cu being 2.0-3.5, Nb being 0.2-0.40, Mn being less than or equal to 0.7, Mo being 0.3-0.8, Si being less than or equal to 1.0, P being less than or equal to 0.02, S being less than or equal to 0.015, and the balance being Fe. The preparation method of the above steel structural material contains the following steps of: 1) weighing each component according to the weight percentage of each component; 2) carrying out vacuum induction melting; 3) casting and remelting electrode bars; 4) remelting electroslag to obtain steel ingots; 5) carrying out homogenization heat treatment; 6) forging wire rod and board strip blank materials; and 7) carrying out finishing, flaw detection and cold machining on the wire rod and board strip blank materials. By the formation of high-toughness low carbon lath-shaped martensite and enhanced means of supplementing molybdenum, copper and other alloy elements, the martensite steel with high strength and toughness, high corrosion resistance and wear resistance is obtained. The preparation method meets requirements such as strong corrosion resistance, excellent abrasion resistance, good machinery processing property, high dimension stability and ferromagnetism.

Description

technical field [0001] The invention relates to a metal material, in particular to a high dimensional stability corrosion-resistant martensitic steel and a preparation method for the steel structure material thereof. Background technique [0002] A new type of instrumentation system researched and developed in China needs to use a structural material with high dimensional accuracy, high surface finish, and high dimensional stability. The material has good comprehensive mechanical properties, corrosion resistance, wear resistance, and ferromagnetism. No studies in this area have been conducted. [0003] In terms of casting stainless steel materials, my country's colleges and universities and scientific research institutes have conducted research and development on the corrosion resistance of specific media, such as casting austenite in sulfuric acid, hydrofluoric acid, seawater, hydrochloric acid, alkali, chloride ion media, and composite media. A large number of research res...

Claims

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Application Information

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IPC IPC(8): C22C38/48C22B9/18C21D8/00
CPCY02P10/25
Inventor 李方张十庆王宏聂尊誉邹兴政刘庆宾赵光明唐锐丁渝红吴承汕
Owner CHONGQING MATERIALS RES INST
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