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Austenitic stainless steel

A technology of austenitic stainless steel and stainless steel, applied in the field of austenitic stainless steel, can solve the problems of high energy consumption, high work hardening rate, large deformation resistance, etc., and achieve the reduction of raw material cost, good cold and hot processing performance, and good mechanical properties and the effect on tensile properties

Inactive Publication Date: 2008-03-12
宁波耀义新材料有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] 1) 0Cr 18 Ni 9 The nickel content in steel is relatively high, which is 8% to 10%. However, the nickel resources in our country are scarce, and the price of nickel has risen rapidly in recent years, resulting in the high price of this brand of stainless steel.
[0004] 2) 0Cr 18 Ni 9 Steel has high deformation resistance and high work hardening rate under complex shape or tension state. From material to product molding, it needs to be annealed several times in the middle, resulting in low production efficiency and high energy consumption.
[0005] 3) 0Cr 18 Ni 9 When making thin-walled parts, steel is slightly magnetic after stretching, so it cannot be used in occasions without magnetic requirements

Method used

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Embodiment Construction

[0016] Below in conjunction with embodiment the present invention is described in further detail.

[0017] The preparation method of the stainless steel alloy sample of the embodiment of the present invention is: batching adopts 08F scrap steel, micro-carbon ferrochrome (C: 0.1%, Cr: 60%), electrolytic metal manganese (Mn: 99.9%), nitrided electrolytic metal manganese (Mn: 90%, N: 6%). Except electrolytic manganese nitride, all of them are smelted in intermediate frequency furnace.

[0018] When the molten steel is completely melted and the temperature reaches 1570°C, remove the oxidized slag and add lime and fluorite to make slag. ) for 12 batches of diffusion deoxidation, and the samples in front of the furnace were taken for spectral analysis. According to the analysis results, adjust the alloy composition, add nitrided electrolytic metal manganese, and then use silicon calcium powder to diffuse and deoxidize 8 batches, and refine for 10 minutes. Add silicon-calcium bloc...

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PUM

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Abstract

The invention relates to an austenite stainless steel comprising by weight Cr12%-14%, Mn 16%-18%, C 0.03%-0.15%, and N 0.15%-0.35%, the remainder are Fe and unavoidable foreign matters, which are Si, P, S and Ni, the allowable percentages by weight of which are Si<=1.0%, P<=0.035%, S<=0.03%, and Ni<=0.35%. The austenite stainless steel is of excellent cold and hot machining plasticity, good tensile property, is free from any magnetism after tensioning, and is of good resistance to corrosion and relatively cheap price.

Description

technical field [0001] The invention relates to an austenitic stainless steel. Background technique [0002] National standard 0Cr 18 Ni 9 (304) steel, as a widely used steel, has good corrosion resistance, heat resistance, low temperature strength and mechanical properties. Widely used in household goods, auto parts, medical appliances, building materials, chemicals, food industry, agriculture, ship parts, etc., can be made into samples of various shapes and specifications, such as steel wire, round steel, square steel, forgings, flanges Wait. However, currently, the national standard 0Cr 18 Ni 9 (304) steel still has the following deficiencies: [0003] 1) 0Cr 18 Ni 9 The nickel content in steel is relatively high, which is 8% to 10%. However, my country's nickel resources are scarce, and in recent years, the price of nickel has risen rapidly, resulting in the high price of stainless steel of this grade. [0004] 2) 0Cr 18 Ni 9 Steel has high deformation resista...

Claims

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Application Information

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IPC IPC(8): C22C38/38C22C38/58
Inventor 张跃
Owner 宁波耀义新材料有限公司
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