增材制造PS模样石膏型熔模铸造铝合金气缸盖
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摘要
基于对PS粉末的粒度分析和对PS粉末、石膏粉末的热重分析,进行了激光选区烧结PS粉末制作气缸盖模样、模样浸涂低温蜡、组装浇注系统模簇、石膏型熔模成形工艺造型、焙烧,在负压条件下浇注ZL101A铝合金气缸盖,随后对铸件进行了T6热处理和检测分析。结果发现,ZL101A气缸盖的表面粗糙度(Sa)为11.894μm,硬度(HBW)为85.8,抗拉强度为142MPa,伸长率为5.5%;T6热处理后,ZL101A气缸盖的硬度(HBW)增加到106,抗拉强度增加到218MPa,而伸长率降低到1.2%。
Based on analysis of PS powder particle size and PS powder & blaster powder thermogravimetric,through selective laser sintering PS powder to make pattern for cylinder head,lower-temperature wax coating pattern and gating system assembly cluster as well as plaster investment casting molding-baking,ZL101 Acylinder head was produced successfully under negative pressure conditions.And then the cylinder head was treated by T6 heat treatment and measured.The results reveal that the surface roughness,the ultimate tensile strength and elongation reach 11.894μm,142 MPa and 5.5%,respectively.After T6 heat treatment,the mechanics properties of ZL101 Acylinder head are 106 HBW in hardness,218 MPa in tensile strength,1.2%in elongation,respectively.
Based on analysis of PS powder particle size and PS powder & blaster powder thermogravimetric,through selective laser sintering PS powder to make pattern for cylinder head,lower-temperature wax coating pattern and gating system assembly cluster as well as plaster investment casting molding-baking,ZL101 Acylinder head was produced successfully under negative pressure conditions.And then the cylinder head was treated by T6 heat treatment and measured.The results reveal that the surface roughness,the ultimate tensile strength and elongation reach 11.894μm,142 MPa and 5.5%,respectively.After T6 heat treatment,the mechanics properties of ZL101 Acylinder head are 106 HBW in hardness,218 MPa in tensile strength,1.2%in elongation,respectively.
引文
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[6]张醒,卢耀辉,郑何妍,等.柴油机铝合金气缸盖热机耦合疲劳损伤分析[D].重庆理工大学学报(自然科学),2017,31(3):82-89.
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[2]边庆月,贾相武,夏振佳.小批量V12大型铝缸体的铸造工艺开发[J].特种铸造及有色合金,2014,34(8):893-896.
[3]卡默.铝手册[M].卢惠民译.北京:化学工业出版社,2008.
[4]温彤,朱军.基于SLS的石膏型熔模铸造成形工艺及质量控制[J].铸造,2011,60(10):972-974.
[5]王新节,王维.消失模铸件表面粗糙度的测量与分析[J].特种铸造及有色合金,2014,34(8):839-843.
[6]张醒,卢耀辉,郑何妍,等.柴油机铝合金气缸盖热机耦合疲劳损伤分析[D].重庆理工大学学报(自然科学),2017,31(3):82-89.
[7]鞠鲁粤.工程材料与成形技术基础(第三版)[M].北京:高等教育出版社,2015.