摘要
激光烧结快速成型制备的平板或大型面类蜡模制壳后,在脱蜡过程中都会产生粉料体积膨胀,导致模壳开裂,铸件尺寸精度无法保证。盖板铸件属于大型面薄壁类铸件,轮廓尺寸达到350 mm×260 mm×10 mm,型面圆弧最低点到两端连线之间的距离为23 mm,采用快速成型蜡模进行生产,更加增大了精密铸造的难度。通过在盖板蜡模快速成型件上贴补低温蜡片,利用二者之间的熔点差和体积补贴,改善了因烧结粉料快速膨胀导致的模壳涨裂,保证了铸件的尺寸精度;通过采用合理的浇注系统、造型工艺及冶炼工艺参数,制备出冶金质量及尺寸精度均符合要求的铸件。
The wax model of plate or arc surface casting which is prepared by rapid prototyping manufacturing technology has a large volume expansion during dewaxing,resulting in cracking of shell mold,deformation of the casting size.The cover plate casting is a large-scale thin-walled casting with an outline size of 350 mm×260 mm×10 mm,and the distance between the lowest point of arc and the highest point is 23 mm.The wax model of cover plate prepared by rapid prototyping manufacturing technology increases the difficulty of investment casting process.Pasting a wax plate on the wax mold prepared by rapid prototyping manufacturing technology,with the melting point difference and volume allowance between the two,shell mold cracking is improved.With side pouring system,proper sand filling molding and smelting parameters,casting with qualified metallurgical quality and dimensional accuracy is produced.
作者
李培佳
许振南
梁超
张亚然
陈兴福
吴剑涛
LI Pei-jia;XU Zhen-nan;LIANG Chao;ZHANG Ya-yan;CHEN Xing-fu;WU Jian-tao(Science and Technology Information Department,Central Iron and Steel Research Institute,Beijing 100081,China;GAONA Aero Material Co.,Ltd.,Beijing 100081,China)
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2020年第6期491-496,共6页
Journal of Iron and Steel Research
关键词
快速成型
精密铸造
蜡模
型壳
冶金质量
rapid prototyping manufacturing technology
investment casting
wax mold
shell mold
metallurgical quality
