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Rare-earth-type 0Cr17Ni4Cu4Nb martensitic precipitation-hardening stainless steel and preparation method thereof

A rare earth and steel technology, applied in the field of alloy steel, can solve the problems of secondary oxidation and burning, achieve the effects of refining grains, reducing dislocation density, and improving shape and toughness

Active Publication Date: 2015-02-04
什邡新工金属材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the present invention also aims at the problem that the addition of rare earths in the prior art may easily cause secondary oxidation and burning loss, and provides a preparation process for preparing the rare earth type 0Cr17Ni4Cu4Nb stainless steel of the present invention by adding rare earths

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  • Rare-earth-type 0Cr17Ni4Cu4Nb martensitic precipitation-hardening stainless steel and preparation method thereof
  • Rare-earth-type 0Cr17Ni4Cu4Nb martensitic precipitation-hardening stainless steel and preparation method thereof
  • Rare-earth-type 0Cr17Ni4Cu4Nb martensitic precipitation-hardening stainless steel and preparation method thereof

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Embodiment Construction

[0045] Glossary explanation: degree of superheat, the temperature difference between the molten steel temperature and its melting point.

[0046] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention. The percentages not specified in the present invention are all percentages by weight.

[0047] According to the chemical composition of a kind of rare earth type 0Cr17Ni4Cu4Nb martensitic precipitation hardening stainless steel according to the present invention, 3 furnaces of the steel of the present invention were smelted on a non-vacuum induction furnace, and the chemical composition (wt%) of the 3 furnaces of steel is as shown in Table 1 . Aft...

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Abstract

The invention discloses rare-earth-type 0Cr17Ni4Cu4Nb martensitic precipitation-hardening stainless steel. The rare-earth-type 0Cr17Ni4Cu4Nb martensitic precipitation-hardening stainless steel is characterized by comprising the following chemical components in percentage by weight: less than or equal to 0.07% of C, less than or equal to 1% of Si, less than or equal to 1% of Mn, less than or equal to 0.035% of P, less than or equal to 0.03% of S, 3.00-5.00% of Ni, 15.5-17.5% of Cr, 3.00-5.00% of Cu, 0.15-0.45% of Nb, 0.05-0.25% of Re and the balance of Fe and belongs to the field of alloy steels. The invention also discloses a preparation method of the rare-earth-type 0Cr17Ni4Cu4Nb martensitic precipitation-hardening stainless steel. The preparation method comprises the steps of smelting, casting, carrying out electroslag remelting, casting ingots, forging or rolling, carrying out solution treatment and the like. The rare-earth-type 0Cr17Ni4Cu4Nb special steel, which is disclosed by the invention, as one of precipitation-hardening martensitic stainless steel, has the characteristics of high strength, high hardness, corrosion resistance and the like and is suitable for various technical fields, such as chemical machinery, food machinery, papermaking machinery, aerospace and marine.

Description

technical field [0001] The invention relates to a chromium stainless steel, in particular to a 0Cr17Ni4Cu4Nb martensitic precipitation hardening stainless steel and a preparation method thereof, belonging to the field of alloy steel. Background technique [0002] In recent years, my country's technical equipment has been continuously improved, and the application and demand for special stainless steel are increasing. However, in some special industrial fields, due to the extremely high requirements on the comprehensive performance of steel, typical single-phase stainless steel is difficult to meet their needs. Typical 0Cr18Ni9 austenitic stainless steel has excellent welding performance and pressure processing performance, but does not have the high strength of martensitic chromium stainless steel. [0003] Typical 0Cr17Ni4Cu4Nb stainless steel is a high-strength precipitation-hardening martensitic stainless steel, which has excellent corrosion resistance after special treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/48C22C33/04C21D8/00
CPCC21D8/00C21D2211/008C22C33/04C22C38/005C22C38/42C22C38/48
Inventor 向花红王俊周乐军
Owner 什邡新工金属材料有限公司
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