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Low-cost ferrite stainless steel with condensate liquid corrosion resistance and manufacturing method thereof

A manufacturing method and ferritic technology, applied in the field of ferritic stainless steel, can solve the problems of cost pressure, low guaranteed life, no longer meeting service life requirements, etc., to improve formability, formability, and condensate resistance. The effect of corrosion and oxidation resistance

Active Publication Date: 2016-12-28
BAOSTEEL DESHENG STAINLESS STEEL
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Problems solved by technology

In October 2013, the state adjusted the three-package standard for automobiles, increasing the minimum guaranteed life from 2 years to 3 years, and the original 11% Cr stainless steel no longer meets the service life requirements
Therefore, the use of 17% Cr stainless steel has brought cost pressure to automobile manufacturers

Method used

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  • Low-cost ferrite stainless steel with condensate liquid corrosion resistance and manufacturing method thereof
  • Low-cost ferrite stainless steel with condensate liquid corrosion resistance and manufacturing method thereof
  • Low-cost ferrite stainless steel with condensate liquid corrosion resistance and manufacturing method thereof

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Embodiment Construction

[0061] The present invention will be further described below in conjunction with embodiment.

[0062] Table 1 shows the composition of the steels of the examples of the present invention and the comparative examples, wherein the steels of the comparative examples 1-3 are ferritic stainless steel exhaust system steels commonly used in automobiles at present. Table 2 is the manufacturing process of the steel of the embodiment of the present invention and the comparative example.

[0063] The corrosion performance of the embodiment of the present invention measures the condensate corrosion resistance, and the composition of the acid condensate corrosive liquid is shown in Table 3, and the SO is adjusted. 4 2- concentration. The test method is as follows: the steel sample is heated to 400°C and kept for 5 hours for later use. Soak the steel sample in the condensate at a constant temperature of 80°C for 24 hours. After the condensate is completely evaporated, clean the sample an...

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Abstract

The invention discloses low-cost ferrite stainless steel with condensate liquid corrosion resistance and a manufacturing method thereof. The low-cost ferrite stainless steel comprises, by mass, 0.001-0.015% of C, 0.05-0.50% of Si, 0.05-0.80% of Mn, 13.5-15.0% of Cr, less than or equal to 0.035% of P, less than or equal to 0.02% of S, less than or equal to 0.3% of Ni, 0.001-0.015% of N, 0.002-0.08% of V, 0.001-0.08% of Al, 0.001-0.08% of Ce, 0.001-0.4% of Cu, one or two of 0.20-0.40% of Nb and 0.10-0.30% of Ti, and the balance Fe and unavoidable impurity elements. The low-cost ferrite stainless steel has excellent condensate liquid corrosion resistance and processing molding performances, satisfies requirements of automobile exhaust system steel in a middle-low temperature range of 400 DEG C or less and has a low manufacturing cost.

Description

technical field [0001] The invention belongs to the field of ferritic stainless steel, and in particular relates to a low-cost ferritic stainless steel with anti-condensate corrosion and a manufacturing method thereof. Background technique [0002] With the development of China's auto industry, China has been the world's largest automaker for five consecutive years. And automobile exhaust pollution has become the main source of smog pollution. For this reason, the increasingly stringent environmental protection requirements and the need to continuously reduce the weight of the vehicle body and the cost of materials have made the materials used in automobile exhaust systems more and more valued by automobile manufacturers. Ferritic stainless steel has the advantages of nickel saving, excellent corrosion resistance, low thermal expansion coefficient, high strength and other physical and mechanical properties, making ferritic stainless steel the preferred material for automobi...

Claims

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Application Information

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IPC IPC(8): C22C38/50C22C38/48C22C38/28C22C38/26C22C33/04
Inventor 毕洪运张志霞李鑫刘春粟常锷王咏波方徽源杨宴宾
Owner BAOSTEEL DESHENG STAINLESS STEEL
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