Martensite precipitation hardening stainless steel for structural member and manufacturing method thereof

A precipitation hardening and manufacturing method technology, applied in the field of stainless steel materials and martensitic stainless steel, can solve the problems of heating temperature and holding time sensitivity, expanding austenite phase area, increasing raw material cost, etc., to reduce vertical and horizontal performance differences, Improve the effect of lateral plasticity and reasonable chemical composition ratio
CN101538686AActive Publication Date: 2009-09-23宝武特种冶金有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
宝武特种冶金有限公司
Publication Date
2009-09-23

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Abstract

The invention provides a martensite precipitation hardening stainless steel for structural member and a manufacturing method thereof. The martensite precipitation hardening stainless steel comprises the following chemical components in percentage by weight: less than or equal to 0.05 percent of C, 13.50 to 15.50 percent of Cr, 2.5 to 4.0 percent of Cu, 3.0 to 5.0 percent of Ni, 0.15 to 0.40 percent of Nb and Ta, 0.010 to 0.040 percent of N, 0.050 to 0.15 percent of V, less than or equal to 0.80 percent of Si, less than or equal to 1.00 percent of Mn, less than or equal to 0.025 percent of P, less than or equal to 0.010 percent of S, and the balance of Fe and inevitable impurities. The stainless steel is smelted by combining an electric furnace, AOD refining and vacuum self-consuming technology, so the stainless steel has the characteristics of high strength, good plasticity, good corrosion resistance and the like, and can meet the requirements of high-strength components such as high-pressure values, oil drill, efficient heavy-duty machinery and the like on material performance.
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Description

technical field

[0001] The present invention relates to stainless steel materials, in particular, the present invention relates to martensitic stainless steel, and more particularly, the present invention relates to a martensitic precipitation hardening stainless steel for engineering materials. Background technique

[0002] Martensitic stainless steels are stainless steels whose properties can be adjusted by heat treatment. According to the difference of alloying elements in steel, martensitic stainless steel can be divided into martensitic chromium stainless steel and martensitic chromium-nickel stainless steel, martensitic chromium-nickel stainless steel can be divided into ordinary martensitic chromium-nickel stainless steel, martensitic Precipitation hardening and maraging stainless steels. Martensitic precipitation hardening stainless steel has the characteristics of high strength, good toughness and excellent corrosion resistance. This type of steel is widely used in...

Claims

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