Super diphase stainless steel welding material and production method thereof

Abstract

The invention relates to a super diphase stainless steel welding material and a production method thereof. The production method sequentially comprises the following procedures of: (1) melting; (2) re-melting electroslag; (3) forging; (4) rolling steel; and (5) drawing. The super diphase stainless steel welding material has favorable pitting resistance, crevice corrosion resistance, vacuole resistance, abrasion corrosion resistance and high fatigue strength in seawater media and good uniform corrosion resistance in various environments, and is the type of steel with strong suitability and wider application range on various media. The mechanical property of the material is shown in as below: sigmab/Mpa>=650, sigma0.2/Mpa>=450, delta5/%>=25, Ak/J>=150, HRC-20.

Description

technical field The invention relates to the field of stainless steel manufacturing, in particular to a super duplex stainless steel welding material and a production method thereof. Background technique The comprehensive mechanical properties of duplex stainless steel pipes are excellent, with high strength and fatigue strength, and its yield strength is twice that of 18-8 steel; in the working conditions where chloride ions are highly concentrated, such as high temperature seawater / high temperature chloride solution Excellent pitting corrosion resistance / seam corrosion resistance / stress corrosion resistance; the tendency of hot cracking in the welding area is small, and the weldability is good. Ocr25Ni6Mo3CuN duplex stainless steel was developed by Japan's Sumitomo Metal Industries in the 1970s. This steel is characterized by adding tungsten, copper and other elements on the basis of high chromium and molybdenum to improve the crevice corrosion resistance of steel. Compar...

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Problems solved by technology

However, the price of the steel is relatively high, and th

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