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Ferritic stainless steel excellent in high-temperature wear resistance, manufacturing method of ferritic stainless steel plate, exhaust component, high-temperature sliding component, and turbocharger component

A sliding part, stainless steel technology, used in turbocharger parts, converters, exhaust manifolds, can solve the problem of cost increase

Active Publication Date: 2021-10-22
NIPPON STEEL STAINLESS STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since all of them contain expensive Ni, the cost increases, so the development of ferritic stainless steel that does not contain Ni is expected

Method used

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  • Ferritic stainless steel excellent in high-temperature wear resistance, manufacturing method of ferritic stainless steel plate, exhaust component, high-temperature sliding component, and turbocharger component
  • Ferritic stainless steel excellent in high-temperature wear resistance, manufacturing method of ferritic stainless steel plate, exhaust component, high-temperature sliding component, and turbocharger component
  • Ferritic stainless steel excellent in high-temperature wear resistance, manufacturing method of ferritic stainless steel plate, exhaust component, high-temperature sliding component, and turbocharger component

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Embodiment Construction

[0044] Embodiments of the ferritic stainless steel plate excellent in high temperature wear resistance suitable for the present invention will be described in detail below.

[0045] [Element]

[0046] First, the composition range of steel will be described. The % related to the content of components means % by mass unless otherwise specified.

[0047] C is an austenite-forming element, and when an austenite phase is formed during high-temperature use, abnormal oxidation occurs and the high-temperature wear resistance significantly decreases. In addition, if carbides are formed in the ferrite phase, the high-temperature strength will decrease, so 0.02% is set as the upper limit. On the other hand, an excessive reduction leads to an increase in cost, so 0.003% is set as the lower limit. Furthermore, considering the production cost, the lower limit is preferably 0.005%. Furthermore, in consideration of toughness, the upper limit is preferably 0.010%.

[0048] Si is sometimes...

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Abstract

The invention relates to a ferritic stainless steel with excellent high-temperature wear resistance, which is characterized in that: in mass %, it contains C: 0.003-0.02%, Si: 0.05-1.0%, Mn: 0.05-1.0%, and P: 0.01 ~0.05%, S: 0.0001~0.01%, Cr: 15~18%, N: 0.002~0.02%, Al: 0.01~0.20%, Cu: 1~3%, Mo: 1.7~3%, Nb: 0.4~ 0.7%, and B: 0.0002 to 0.0030%, the remainder includes Fe and unavoidable impurities; at a depth of 20 μm from the surface, there are 0.06 Nb-containing precipitates / μm 2 above.

Description

technical field [0001] The present invention relates to ferritic stainless steel excellent in high-temperature wear resistance as a raw material of heat-resistant parts requiring heat resistance and processability, a method of manufacturing a ferritic stainless steel plate, exhaust parts, high-temperature sliding parts, and turbochargers part. [0002] The invention is particularly applicable to exhaust manifolds, converters, and turbocharger parts of automobiles. In addition, it relates to materials most suitable for internal precision parts such as nozzle mounts, nozzle plates, vanes, and back plates of turbochargers mounted on gasoline and diesel vehicles, and outer cylinder parts such as turbine housings. . Background technique [0003] Exhaust manifolds, front pipes, center pipes, mufflers, and exhaust gas purification environmental adaptation parts for automobiles can use heat resistance such as oxidation resistance, high-temperature strength, and thermal fatigue cha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/00C21D9/46C22C38/32C22C38/60
CPCC21D9/46C22C38/00C22C38/32C22C38/60
Inventor 滨田纯一吉井睦子吉泽俊希
Owner NIPPON STEEL STAINLESS STEEL CORP
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