Improvement of wear resistance for engine valve: Introducing cold upsetting treatment on valve seating face - Details

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Abstract：

This　study　presents　a　new　surface　strengthening　technique　(cold　upsetting　manufacturing　process)　for　engine　valve　seating　face　(VSF).　The　properties　of　the　Ni30　superalloy　VSF　were　characterized　before　and　after　cold　upsetting.　Compared　to　the　solution-aging　treatment　(SAT)　valve,　the　solution-cold　upsetting-aging　treatment　(SCUAT)　valve　hardness　was　increased　by　60　HV0.2.　SCUAT　valves　exhibited　higher　internal　dislocation　degrees　and　local　misorientation　than　SAT　valves.　Bench-top　wear　tests　at　650　°C　and　750　°C　were　conducted.　The　valve　wear　loss　at　650　°C　was　higher　than　that　at　750　°C.　SCUAT　valves　show　better　wear　resistance,　with　a　total　wear　loss　reduction　up　to　26.76　%.　The　SCUAT　valve-seat　insert　contact　pair　wear　mechanisms　are　adhesive　and　fatigue　wear.　©　2024　Elsevier　B.V.

Keyword：

Exhaust systems (engine) Gluing Internal combustion engines Nickel alloys Surface hardening Upsetting (forming) Valves (mechanical) Wear of materials

Community：

[ 1 ] [Lai, Fuqiang]School of Mechanical Engineering and Automation, Fuzhou University, Fujian, Fuzhou; 350116, China
[ 2 ] [Cao, Changsheng]School of Mechanical Engineering and Automation, Fuzhou University, Fujian, Fuzhou; 350116, China
[ 3 ] [Shi, Chuangwei]School of Mechanical Engineering and Automation, Fuzhou University, Fujian, Fuzhou; 350116, China
[ 4 ] [Sun, Ge]Huaiji Dengyue Valve Co., Ltd, Guangdong, Huaiji County; 526400, China
[ 5 ] [Qu, Rong]Huaiji Dengyue Valve Co., Ltd, Guangdong, Huaiji County; 526400, China
[ 6 ] [Mo, Dongqiang]Huaiji Dengyue Valve Co., Ltd, Guangdong, Huaiji County; 526400, China
[ 7 ] [Lin, Youxi]School of Mechanical Engineering and Automation, Fuzhou University, Fujian, Fuzhou; 350116, China
[ 8 ] [Qu, Shengguan]School of Mechanical and Automotive Engineering, South China University of Technology, Guangdong, Guangzhou; 510640, China
[ 9 ] [Lewis, Roger]Department of Mechanical Engineering, The University of Sheffield, Mappin Street, Sheffield; S1 3JD, United Kingdom
[ 10 ] [Slatter, Tom]School of Mechanical, Electrical & Manufacturing Engineering, Loughborough University, Epinal Way, Loughborough, LE11 3TU, United Kingdom
[ 11 ] [Xue, Xin]School of Mechanical Engineering and Automation, Fuzhou University, Fujian, Fuzhou; 350116, China

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Wear

ISSN： 0043-1648

Year： 2025

Volume： 564-565

5 . 3 0 0

JCR@2023

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