文章摘要
活塞用Cu和Ni增强型铝合金的 组织与性能
Microstructure and properties of Cu and Ni reinforcedaluminum alloys for piston
  
DOI:
中文关键词: 活塞  B型铝合金  ZL109  强度  断口
英文关键词: piston  B type aluminum alloy  ZL109  strength  fracture
基金项目:
作者单位
谢长钊1,2,王振生1,彭真1,苏新1 1.湖南科技大学 机电工程学院湖南 湘潭 411201
2.中国长安汽车集团股份有限公司湖南江滨活塞分公司湖南 湘潭 411102 
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中文摘要:
      本文对比研究了一种新型活塞用B型铝合金与ZL109的组织与力学性能.研究表明,ZL109的组织由Al,Si,Al6Mn和Al5FeNi的相组成,B型铝合金由Al,Si,Al6Mn,Al2Cu,Al1.9CuMg4.1Si3.3(Q相),AlNiCu和更多的Al5FeNi组成;源于B型铝合金中的α铁相呈现鱼骨状和块状,减轻了ZL109组织中针片状β铁相对基体的割裂作用,La和Ce元素的AlNiCu相高温下可起到阻碍晶界滑动和阻碍基体变形的作用,并且组织中还生成了Al2Cu,Al5FeNi和Al1.9CuMg4.1Si3.3强化相;因而,B型铝合金的力学性能优于ZL109,且受活塞缸径尺寸规格的影响较小;B型铝合金的断裂类型为准解理断裂,呈现韧窝、舌状花样以及撕裂棱特征.
英文摘要:
      The microstructures and mechanical properties of a new type of piston type B aluminum alloy and ZL109 were compared. The results show that the composition of Al, Si, Al6Mn and Al5FeNi of ZL109 is composed of Al, Si, Al6Mn, Al2Cu, Al1.9CuMg4.1Si3.3 (Q phase), AlNiCu and more Al5FeNi. The α-iron phase in the B-type aluminum alloy showed fish bones and lumps, which reduce the cleavage of the needle-like β-iron in the ZL109 tissue. The AlNiCu phase of La and Ce elements can block the grain boundary, and the role of matrix deformation, and the organization also produce Al2Cu, Al5FeNi and Al1.9CuMg4.1Si3.3 enhanced phase; therefore, B-type aluminum alloy mechanical properties is better than ZL109, and by the piston bore size specifications is less affected. The fracture type of B type aluminum alloy is quasi-cleavage fracture, showing dimple, tongue pattern and tearing edge.
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