Application of plasma hardening process for 316L stainless steel valve inner parts

doi:10.13251/j.issn.0254-6051.2022.01.035

Abstract

Abstract: 316L austenitic stainless steel was treated by plasma nitriding (PN) and plasma carbonitriding(PNC) processes. The infiltration layer thickness, microhardness, corrosion resistance, surface roughness and deformation of the steel were discussed and analyzed by means of metallographic microscope, microhardness tester, electrochemical workstation, roughness detector and trilinear coordinates measuring instrument. The results show that plasma carbonitriding can produce infiltration layer with good hardness distribution, which can improve the corrosion resistance of the 316L steel. Plasma carbonitriding technology can be applied as surface hardening treatment of 316L steel valve internals, which can significantly improve the surface hardness under the condition of ensuring the size matching tolerance of parts.

Key words: 316L austenitic stainless steel, plasma nitriding, plasma carbonitriding, valve inner parts

CLC Number:

TG142.7

Zhang Pengqi, Shang Hongbao, Li Li, Zhou Zhiqiang. Application of plasma hardening process for 316L stainless steel valve inner parts[J]. Heat Treatment of Metals, 2022, 47(1): 212-216.

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