TY - JOUR
T1 - Falling-off resistant material selection and design of diesel engine valve seats
AU - Wang, Xiao Song
AU - Zhang, Wei Zheng
AU - Zhang, Ti En
AU - Guo, Bing Bin
AU - Zhang, Chi
N1 - Publisher Copyright:
© 2015, China Ordnance Society. All right reserved.
PY - 2015/10/1
Y1 - 2015/10/1
N2 - The falling-off cause of exhaust valve seats in a strengthened diesel engine is analyzed in terms of material selection and design. Three materials, cobalt, nickel and powder based alloy, are tested on their strengths, thermal expansion properties, friction properties and volume stabilities. The assembly interference is considered through FEM simulation, and the engine test is carried out to validate the reliability of the new material valve seat. The results show that nickel-based alloy has the lowest friction property. The volume stability of powder-based alloy is lower than that of cobalt-based alloy. Cobalt-based alloy has the highest temperature compressive and friction properties, and presents a good ability to defend the abnormal operations. Moreover, with the increase in the material strength, the assembly interference could be enhanced to 0.081~0.113 mm, with a safe coefficient of 1.4 for both cylinder head and valve seats.
AB - The falling-off cause of exhaust valve seats in a strengthened diesel engine is analyzed in terms of material selection and design. Three materials, cobalt, nickel and powder based alloy, are tested on their strengths, thermal expansion properties, friction properties and volume stabilities. The assembly interference is considered through FEM simulation, and the engine test is carried out to validate the reliability of the new material valve seat. The results show that nickel-based alloy has the lowest friction property. The volume stability of powder-based alloy is lower than that of cobalt-based alloy. Cobalt-based alloy has the highest temperature compressive and friction properties, and presents a good ability to defend the abnormal operations. Moreover, with the increase in the material strength, the assembly interference could be enhanced to 0.081~0.113 mm, with a safe coefficient of 1.4 for both cylinder head and valve seats.
KW - Assembly interference
KW - High temperature compressive strength
KW - Power machinery engineering
KW - Safe coefficient
KW - Valve seat
UR - https://www.scopus.com/pages/publications/84954546547
U2 - 10.3969/j.issn.1000-1093.2015.10.001
DO - 10.3969/j.issn.1000-1093.2015.10.001
M3 - Article
AN - SCOPUS:84954546547
SN - 1000-1093
VL - 36
SP - 1825
EP - 1831
JO - Binggong Xuebao/Acta Armamentarii
JF - Binggong Xuebao/Acta Armamentarii
IS - 10
ER -