Nickel-saving rare-earth/barium-containing biphase stainless steel alloy material and preparation method thereof

A technology of duplex stainless steel and alloy materials, applied in the field of duplex stainless steel, can solve the problems of difficulty in meeting high temperature and corrosive use conditions, increase production costs, etc., and achieve significant economic and social benefits, cost savings, and good ductility.

Active Publication Date: 2015-06-17
JIANGSU XIHU SPECIAL STEEL
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Problems solved by technology

The production and use of these alloys will undoubtedly consume a large amount of expensive nickel, which will not only increase production costs, but also go against the general trend of "energy saving and emission reduction", and their application will inevitably be strictly restricted
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Method used

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  • Nickel-saving rare-earth/barium-containing biphase stainless steel alloy material and preparation method thereof
  • Nickel-saving rare-earth/barium-containing biphase stainless steel alloy material and preparation method thereof
  • Nickel-saving rare-earth/barium-containing biphase stainless steel alloy material and preparation method thereof

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the examples, but these examples do not constitute any limitation to the present invention.

[0037] According to the chemical composition range set by the present invention, 5 furnaces of steel were smelted in a vacuum induction furnace, and aluminum was used for final deoxidation before tapping, and lanthanum-cerium mixed rare earth RE (lanthanum-cerium mixed rare earth, La≦51 %, Ce≦42%, also containing one or more of praseodymium, neodymium, promethium, samarium rare earth elements, rare earth content≧99.7%) and silicon-barium alloy, and then tapped and cast into ingots; steel ingots are forged into 20×50× For a 200mm slab, the forging temperature is 980-1300°C; the final chemical composition of the 5 furnace steel is as follows figure 1 shown in the list.

[0038] The mechanical performance samples of the alloy forged, the samples used for corrosion tests and the industrial coupons are direc...

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Abstract

The invention relates to a nickel-saving rare-earth/barium-containing biphase stainless steel alloy material and a preparation method thereof. The alloy material is composed of the following components in percentage by mass: at most 0.025% of C, at most 0.005% of O, at most 0.006% of S, at most 2.00% of Si, at most 0.025% of P, 2.00-5.00% of Mn, 17.0-21.0% of Cr, 1.0-2.5% of Ni, 0.1-2.0% of W, 0.1-1.0% of Cu, 2.0-5.5% of Mo, 0.2-0.40% of N, 0.001-0.01% of B, 0.0005-0.01% of Ba, 0.01-0.2% of lanthanum-cerium mixed rare earth RE and the balance of Fe. The preparation method comprises the following steps: smelting, casting, cast ingot or casting blank cogging, hot rolling and solution treatment. The method has the advantages of nickel saving and low production cost, obviously enhances the mechanical strength, and improves the hot working properties, corrosion resistance and the like.

Description

technical field [0001] The invention belongs to the technical field of duplex stainless steel, in particular to a nickel-saving rare earth-containing and barium duplex stainless steel alloy material and a preparation method thereof. Background technique [0002] Duplex stainless steel is composed of ferrite phase and austenite phase, which combines the advantages of single-phase ferrite and single-phase austenite, and has good mechanical properties, good toughness and excellent corrosion resistance. It has been widely used in petroleum and chemical industry. However, the use of domestic duplex stainless steel still has certain limitations. For example, we don’t have much experience in several large fields such as pulp and paper industry, oil and gas industry, transportation industry, and even construction industry that use duplex stainless steel in large quantities abroad. Some are just getting started. [0003] Some chemical companies in China's existing industries, such ...

Claims

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Application Information

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IPC IPC(8): C22C38/58C21D8/00
Inventor 刘晓梁精龙李运刚马利飞
Owner JIANGSU XIHU SPECIAL STEEL
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