松孔镀铬缸套磨损机理研究
|
摘要
采用往复式摩擦磨损试验机,从缸套、活塞环零件上切取试样开展试验,通过测量镀铬缸套的摩擦系数、磨损量,观察缸套磨损后形貌、磨粒形貌以及成分并与传统合金铸铁缸套对比,研究松孔镀铬缸套的磨损机理.结果表明:与铸铁缸套相比,镀铬缸套可以大幅降低缸套磨损量,但摩擦系数略高,对活塞环磨损略大;镀铬缸套磨损后表面呈现点状微坑形貌,磨粒呈片状或薄片状;镀铬层的松孔附近在往复摩擦力的作用下萌生疲劳裂纹,裂纹沿表面平行于滑动方向扩展,直至延伸到表面脱落,形成磨粒,造成磨损.
Tribological properties between cylinder liner and piston ring were investigated on a reciprocating sliding tester.Compared with cast iron cylinder,friction coefficient and wear of cylinder liners at different loads,morphologies and components of cylinder liners and wear debris were observed to study the wear mechanism of chromium plated cylinder liner.Results show that,compared with cast iron cylinder liner,the wear of chromium plated cylinder liner reduces greatly,however the friction coefficient slightly increases and the wear of piston ring is a little larger.The wear surfaces of cylinder show dotted micro-pit morphology,and the morphologies of wear debris are platy and laminar.Wear mechanism of chromium plated cylinder liner is that fatigue cracks are initiated near the micro-crack of chromium coating under the action of friction force,and then the cracks extend in parallel with sliding direction till to the surface.The coating pieces separate from the substrate forming debris.
Tribological properties between cylinder liner and piston ring were investigated on a reciprocating sliding tester.Compared with cast iron cylinder,friction coefficient and wear of cylinder liners at different loads,morphologies and components of cylinder liners and wear debris were observed to study the wear mechanism of chromium plated cylinder liner.Results show that,compared with cast iron cylinder liner,the wear of chromium plated cylinder liner reduces greatly,however the friction coefficient slightly increases and the wear of piston ring is a little larger.The wear surfaces of cylinder show dotted micro-pit morphology,and the morphologies of wear debris are platy and laminar.Wear mechanism of chromium plated cylinder liner is that fatigue cracks are initiated near the micro-crack of chromium coating under the action of friction force,and then the cracks extend in parallel with sliding direction till to the surface.The coating pieces separate from the substrate forming debris.
引文
[1]Nakashima K,Murakami Y,Yamamoto M,et al.Projection behavior of piston rings in cylinder ports of a two-stroke cycle engine[J].SAE International Journal of Engines,2013,6(1):204-208.
[2]周龙,白敏丽,吕继祖.结构参数对活塞环-气缸套润滑摩擦性能影响的数值模拟[J].内燃机学报,2012,30(5):456-461.
[3]Navthar R R,Narwade P A.Design and analysis of cylinder and cylinder head of 4-stroke SI engine for weight reduction[J].International Journal of Engineering Science and Technology,2012,4(3):847-853.
[4]Vetter J,Barbezat G,Crummenauer J,et al.Surface treatment selections for automotive applications[J].Surface&Coatings Technology,2005,200:1963-1968.
[5]Huang R F,Yang H S,Yeh C N.In-cylinder flows of a motored four-stroke engine with flat-crown and slightly concave-crown pistons[J].Experimental Thermal and Fluid Science,2008,32(5):1156-1167.
[6]Huang R F,Huang C W,Chang S B,et al.Topological flow evolutions in cylinder of a motored engine during intake and compression strokes[J].Journal of Fluids and Structures,2005,20(1):105-127.
[7]Yue W,Wang C,Liu Y,et al.Study of the regenerated layer on the worn surface of a cylinder liner lubricated by a novel silicate additive in lubricating oil[J].Tribology Transactions,2010,53(2):288-295.
[8]Fedrizzi L,Rossi S,Bellei F,et al.Wear-corrosion mechanism of hard chromium coatings[J].Wear,2002,253:1173-1181.
[9]EI-Amoush A S,Abu-Rob A,Edwan H,et al.Tribological properties of hard chromium coated 1010,mild steel under different sliding distances[J].Solid State Sciences,2011,13:529-533.
[10]Sohi M H,Kashi A A,Hadavi S M M.Comparative tribological study of hard and crack-free electrodeposited chromium coatings[J].Journal of Materials Processing Technology,2003,138(1):219-222.
[11]杨其明.磨粒分析——磨粒图普与铁谱技术[M].北京:中国铁道出版社,2002:91-92.
[12]高志,赵源,李英.快速磨损试验机及其试验方法[J].润滑与密封,1998,(4):43-45.
[13]朱峰,王增全,王建平,等.合金铸铁缸套与PVD(Cr N)活塞环配对时缸套磨损机理[J].内燃机学报,2014,32(5):474-479.
[14]沈岩.高强化柴油机缸套—活塞环摩擦状态转化机制研究[D].大连:大连海事大学轮机学院,2014.
[15]温诗铸,黄平.摩擦学原理[M].第3版.北京:清华大学出版社,2008:146-149.
[16]Riahi A R,Alpas A T.Wear map for grey cast iron[J].Wear,2003,255(1):401-409.
[17]Jahanmir S,Suh N P.Mechanics of subsurface void nucleation in delamination wear[J].Wear,1977,44:17-38.
[2]周龙,白敏丽,吕继祖.结构参数对活塞环-气缸套润滑摩擦性能影响的数值模拟[J].内燃机学报,2012,30(5):456-461.
[3]Navthar R R,Narwade P A.Design and analysis of cylinder and cylinder head of 4-stroke SI engine for weight reduction[J].International Journal of Engineering Science and Technology,2012,4(3):847-853.
[4]Vetter J,Barbezat G,Crummenauer J,et al.Surface treatment selections for automotive applications[J].Surface&Coatings Technology,2005,200:1963-1968.
[5]Huang R F,Yang H S,Yeh C N.In-cylinder flows of a motored four-stroke engine with flat-crown and slightly concave-crown pistons[J].Experimental Thermal and Fluid Science,2008,32(5):1156-1167.
[6]Huang R F,Huang C W,Chang S B,et al.Topological flow evolutions in cylinder of a motored engine during intake and compression strokes[J].Journal of Fluids and Structures,2005,20(1):105-127.
[7]Yue W,Wang C,Liu Y,et al.Study of the regenerated layer on the worn surface of a cylinder liner lubricated by a novel silicate additive in lubricating oil[J].Tribology Transactions,2010,53(2):288-295.
[8]Fedrizzi L,Rossi S,Bellei F,et al.Wear-corrosion mechanism of hard chromium coatings[J].Wear,2002,253:1173-1181.
[9]EI-Amoush A S,Abu-Rob A,Edwan H,et al.Tribological properties of hard chromium coated 1010,mild steel under different sliding distances[J].Solid State Sciences,2011,13:529-533.
[10]Sohi M H,Kashi A A,Hadavi S M M.Comparative tribological study of hard and crack-free electrodeposited chromium coatings[J].Journal of Materials Processing Technology,2003,138(1):219-222.
[11]杨其明.磨粒分析——磨粒图普与铁谱技术[M].北京:中国铁道出版社,2002:91-92.
[12]高志,赵源,李英.快速磨损试验机及其试验方法[J].润滑与密封,1998,(4):43-45.
[13]朱峰,王增全,王建平,等.合金铸铁缸套与PVD(Cr N)活塞环配对时缸套磨损机理[J].内燃机学报,2014,32(5):474-479.
[14]沈岩.高强化柴油机缸套—活塞环摩擦状态转化机制研究[D].大连:大连海事大学轮机学院,2014.
[15]温诗铸,黄平.摩擦学原理[M].第3版.北京:清华大学出版社,2008:146-149.
[16]Riahi A R,Alpas A T.Wear map for grey cast iron[J].Wear,2003,255(1):401-409.
[17]Jahanmir S,Suh N P.Mechanics of subsurface void nucleation in delamination wear[J].Wear,1977,44:17-38.