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A Study on the Plasma Nitriding Application for the Durability Improvement of the Exhaust Decoupler  

Hur, Deog-Jae (Product Design Technology Center, Institute for Advanced Engineering)
Kim, Sang-Sik (Plasma Technology Center, Institute for Advanced Engineering)
Chung, Tae-Jin (Department of Mechanical Design Engineering, Kunsan National University)
Kim, Do-Hoon (SDB Bellows Co., Ltd., R&D Center)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.14, no.3, 2006 , pp. 157-163 More about this Journal
Abstract
This paper described the process of improving durability performance of the exhaust decoupler by the plasma nitriding. The properties of plasma nitriding treatment of AIS1304 stainless steel were tested using specimens before applying plasma nitriding to a mesh ring. In order to analyses the effect of plasma nitriding treatment on the mechanical properties, SEM(Scanning Electron Microscopes), roughness and hardness tester were used. Based on specimen plasma nitriding, we could find appropriate condition for application to the mesh ring of decoupler. To confirm the improved durability performance, we compared the number of cycles, which reaches to fracture, of the nitrided decoupler and that of the unnitrided decoupler by the bending cyclic test. In this test, the durability and wear resistance of the mesh ring are significantly improved by plasma nitriding treatment.
Keywords
Plasma nitriding; Decoupler mesh ring; Durability test; AISI 304 stainless steel; Wear resistance;
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