熔模铸造铸态QT600-10的生产工艺
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摘要
介绍了汽车压缩机支架的铸件结构及技术要求,详细阐述了铸件的生产工艺:将球化处理后的化学成分控制在:w(C) 3.3%～3.6%,w(Si) 2.8%～3.0%,w(Mn) 0.2%～0.3%,w(Cu) 0.4%～0.6%,w(P)≤0.035%,w(S)≤0.02%,w(Mg_残)0.03%～0.055%,w(RE_残)≤0.02%;选用Fe Si Mg6RE1球化剂进行冲入法球化处理;采用粒度为4～8 mm的75Si Fe孕育剂进行初孕育,Si Ba Ca复合孕育剂进行第2次孕育,浇注时使用粒度为1～2 mm的Si Ba Ca复合孕育剂进行第3次型内孕育。生产结果显示:铸件的球化等级1～3级,石墨球大小6～8级,珠光体体积分数35%～55%,其抗拉强度不低于600 MPa,伸长率不低于10%,满足技术要求。
The casting structure and technical requirements of the automobile compressor bracket was introduced. The production process of the casting was elaborated:the chemical composition after spheroidized treatment was controlled at:w(C) 3.3%～3.6%,w(Si)2.8%～3.0%,w(Mn)0.2%～0.3%,w(Cu)0.4%～0.6%,w(P)≤0.035%,w(S)≤0.02%,w(Mg_(residua))l0.03%～0.055%,w(RE_(residua))l≤0.02%. Use Fe Si Mg6 RE1 spheroidizing agent for spheroidization treatment. Use 75 Si Fe inoculant with particle size of 4～8 mm for initial inoculation. Si Ba Ca compound inoculant for second inoculation. The third in-line inoculation was carried out using a Si Ba Ca complex inoculant with a particle size of 1～2 mm when pouring. The production results showed that the spheroidization grade of castings was 1～3,the graphite spheres grade was 6～8,the pearlite volume fraction was 35%～55%,the tensile strength was not less than 600 MPa,and the elongation was not less than 10%. That met the technical requirements.
The casting structure and technical requirements of the automobile compressor bracket was introduced. The production process of the casting was elaborated:the chemical composition after spheroidized treatment was controlled at:w(C) 3.3%～3.6%,w(Si)2.8%～3.0%,w(Mn)0.2%～0.3%,w(Cu)0.4%～0.6%,w(P)≤0.035%,w(S)≤0.02%,w(Mg_(residua))l0.03%～0.055%,w(RE_(residua))l≤0.02%. Use Fe Si Mg6 RE1 spheroidizing agent for spheroidization treatment. Use 75 Si Fe inoculant with particle size of 4～8 mm for initial inoculation. Si Ba Ca compound inoculant for second inoculation. The third in-line inoculation was carried out using a Si Ba Ca complex inoculant with a particle size of 1～2 mm when pouring. The production results showed that the spheroidization grade of castings was 1～3,the graphite spheres grade was 6～8,the pearlite volume fraction was 35%～55%,the tensile strength was not less than 600 MPa,and the elongation was not less than 10%. That met the technical requirements.
引文
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[2]肖连华.球墨铸铁轧辊的球化孕育处理分析与应用[J].现代铸铁,2017,(05):19-21.
[3]彭凡,尤国庆,郭亮.QT900-2高强韧厚大断面球墨铸铁的研究[J].现代铸铁,2018,(01):33-37.
[4]陈建国,王小伟,王国华.高Si球墨铸铁磨煤机摇臂的生产工艺[J].现代铸铁,2018,(01):38-40.
[5]韩清环,冀建勇,李建平,等.稳定生产高强度4缸球墨铸铁曲轴的研究[J].现代铸铁,2018,(02):19-26.
[6]李蒙.铸态QT600-10球墨铸铁的试制[A].中国铸造活动周文集[C].沈阳:全国铸造学会,2009.
[7]Sisak.The Influence of Silicon and Boron on Tensile Properties of Ductile Iron[J].Livarski vestnik,2012,59:68-79.
[8]李冬琪,徐德民,于海生.高端球墨铸铁件的研制与应用[J].现代铸铁,2015,(05):26-31.
[9]中国机械工程学会铸造分会.铸造手册[M].北京:机械工业出版社,2006.
[10]郭振廷,孙雅心,李蒙.球化剂含Mg量对Mg吸收率的影响[J].生产技术,2014,(03):623-625.