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不同成分的钒钛灰铸铁组织及性能研究
Study on Microstructure and Properties of Vanadium Titanium Gray Cast Iron with Different Compositions
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- DOI:
- 作者:
- 孙兰 鲜广 蒋繁 范洪远
SUN Lan;XIAN Guang;JIANG Fan;FAN Hongyuan
- 作者单位:
- 四川大学机械工程学院
School of Mechanical Engineering,Sichuan University,Chengdu 610065,China
- 关键词:
- 灰铸铁 制动鼓 石墨形态 导热性
gray cast iron brake drum graphite morphology thermal conductivity
- 摘要:
- 通过成分设计、配料、熔炼、浇注等工序的有效控制铸造了钒钛灰铸铁制动鼓,研究了不同成分的钒钛灰铸铁制动鼓组织和性能变化。结果表明,随着钒钛含量增加,石墨得到细化,石墨形态由A型向D型石墨转变;随着钒钛含量的增加,灰铸铁的强度和硬度增加,导热性能下降。碳硅钒钛含量进一步增加,会出现粗大厚片状或块状石墨,强度和硬度显著下降;可以通过控制灰铸铁中钒钛元素含量,提高其抗拉强度、硬度及导热性能
The vanadium-titanium gray cast iron brake drum was cast by effective control of composition design,batching,melting and pouring.The microstructure and properties of the brake drum with different composition were studied.The results show that with the increase of vanadium and titanium content,the graphite is refined and the graphite form changes from A type to D type.With the increase of vanadium and titanium content,the strength and hardness of gray cast iron increase,but the thermal conductivity decreases.When the content of carbon,silicon,vanadium and titanium increases further,coarse and thick flake or block graphite will appear,and the strength and hardness will decrease significantly.The tensile strength,hardness and thermal conductivity of gray cast iron can be improved by controlling the content of vanadium and titanium.