Novel austenitic heat-resistance stainless steel

A technology of heat-resistant stainless steel and austenite, which is applied in the field of alloy steel, can solve problems such as component damage, alloy failure, and grain boundary segregation, and achieve the effects of improving economic benefits, reducing component consumption, and reducing embrittlement

Inactive Publication Date: 2010-12-22
JIANGSU XINHUA ALLOY ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Austenitic heat-resistant steel with a face-centered cubic structure, although it has high high-temperature strength at 650 ° C or higher, but because of the hard and brittle σ phase in the austenitic heat-resistant s...

Method used

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  • Novel austenitic heat-resistance stainless steel
  • Novel austenitic heat-resistance stainless steel
  • Novel austenitic heat-resistance stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0068] 1. Mechanical property test

[0069]

[0070] 2. Impact toughness, hardness

[0071]

[0072] 3. Oxidation weight gain rate and corrosion weight loss rate in molten salt

[0073]

[0074] Test results: According to the analysis of the measurement situation of the austenitic heat-resistant stainless steel trial production piece, the above-mentioned austenitic heat-resistant stainless steel 314 (the present invention) meets the requirements of parts such as engines, steam boilers, steam turbines, ethylene cracking furnaces and ammonia conversion furnaces. The use requirements of the item, the manufacturing process of the product is stable.

[0075] Through the above examples and mechanical performance testing, the austenitic heat-resistant stainless steel designed by the present invention has reasonable composition design, stable manufacturing process, excellent high-temperature strength and plasticity suitable for it, and high high-temperature oxidation resista...

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PUM

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Abstract

The invention discloses novel austenitic heat-resistance stainless steel, which belongs to the field of alloy steel. The novel austenitic heat-resistance stainless steel comprises the following components in percentage by weight: 0.04-0.08% of C, 2.05-2.80% of Si, 1.3-2.0% of Mn, less than or equal to 0.035% of P, less than or equal to 0.030% of S, 23.5-26.0% of Cr, 19.2-22.0% of Ni, 0.08% of N, 0.20-1.50% of Co, 0.10-0.20% of Mo, 0.01-1.0% of Xt and the balance of Fe and unavoidable impurities. The finished product of the austenitic heat-resistance stainless steel is prepared by mixing the raw materials, smelting in a vacuum refining furnace, performing electroslag refining, forging, performing hot rolling, annealing and performing multi-drawing, annealing and drawing. The austenitic heat-resistance stainless steel of the invention has the advantages of reasonable component design, stable manufacturing process, high high-temperature strength, adaptive plasticity and relatively high high-temperature oxidation resistance, corrosion resistance, fatigue resistance, creep resistance and impact toughness.

Description

technical field [0001] The invention belongs to the field of alloy steel, in particular to a novel austenitic heat-resistant stainless steel. It is mainly steel for structural parts that can withstand greater stress in high temperature, strong oxidation, and strong corrosion environments. Background technique [0002] In aerospace, ships, electric power, petrochemical and other fields, related components such as engines, steam boilers, steam turbines, ethylene cracking furnaces and ammonia conversion furnaces have been used in high temperature for a long time, and these components are stretched and bent under high temperature. , torsion, fatigue and impact and other loads, while also in contact with high-temperature steam, air or gas, causing high-temperature oxidation or gas corrosion on the surface. Working in high temperature environment, steel and alloy will produce atomic diffusion process, which will cause metallographic structure transformation, so this requires that...

Claims

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Application Information

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IPC IPC(8): C22C38/52C22C38/58C22C33/04C21D8/00
Inventor 华大凤王树平
Owner JIANGSU XINHUA ALLOY ELECTRIC
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