Preparation method of high-endurance-strength steam-corrosion-resistance austenitic heat-resistance steel

A technology of austenitic heat-resistant steel and lasting strength, which is applied in the field of preparation of austenitic heat-resistant steel, can solve problems such as inapplicability, and achieve the effects of improving oxygen supply strength, reducing carbon content, and reducing the burning loss of chromium
CN107475640AActive Publication Date: 2017-12-15YONGXING SPECIAL STAINLESS STEEL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YONGXING SPECIAL STAINLESS STEEL
Publication Date
2017-12-15

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Abstract

The invention relates to a preparation method of high-endurance-strength steam-corrosion-resistance austenitic heat-resistance steel, and belongs to the technical field of austenitic heat-resistance steel. The method sequentially comprises the technological steps of ingredient preparation, decarburization by oxygen blowing, reduction, steel tapping, ladle refining, casting, cogging and hot rolling. Compared with 22 / 15 austenitic heat-resistance steel, the SP22 / 15 has the similar nickel content and chrome content, however has the better high temperature endurance strength and high temperature steam corrosion resistance, and therefore the steel has the better market prospect compared with 22 / 15 austenitic heat-resistance steel. The steel can completely replace 22 / 15 austenitic heat-resistance steel, and can adapt to severe conditions to which 22 / 15 austenitic heat-resistance steel cannot adapt, for example, the steel can normally work at the high temperature and high pressure steam environment under 650DEG C and 35 MPa, and keep good impact toughness.
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Description

technical field

[0001] The invention relates to a preparation method of austenitic heat-resistant steel, in particular to a preparation method of austenitic heat-resistant steel with high durable strength and steam corrosion resistance. Background technique

[0002] In order to improve the conversion efficiency of coal combustion, the construction of high-heat-resistant systems has become an important breakthrough, especially in the research of high-temperature materials for 600°C ultra-supercritical boilers. In December 2006, my country's first 600°C ultra-supercritical coal-fired generating set was put into operation, and all indicators have reached international advanced standards. Since then, my country has vigorously developed 600°C ultra-supercritical units, and more than 100 units have been put into operation so far, occupying an absolute advantage in the total number of ultra-supercritical coal-fired generating units in the world.

[0003] At present, high-pressure ...

Claims

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