高刚度低应力数控机床铸件的研究与生产  

Research and Production of High Stiffness and Low stress CNC Machine Tool Castings

作　　者：李云龙 LI Yunlong(Yuxi Jinfu Intelligent Equipment Co.,Ltd.,Yuxi 653100,Yunnan China)

机构地区：[1]玉溪锦福智能设备有限公司,云南玉溪653100

出　　处：《铸造工程》2024年第S02期1-7,共7页Foundry Engineering

摘　　要：为实现树脂砂工艺条件下机床铸件高刚度、低应力的要求,通过实施将碳当量提高至3.8%以上,硅碳比控制在0.69~0.74,适当添加微量Sn、Cr、N等合金,静置高温铁液和强化孕育处理等措施,可实现HT300机床铸件:抗拉强度≥300 MPa,硬度200~240 HBW,弹性模量120~135 GPa,铸态残余应力≤50 MPa。In order to achieve the requirements of high stiffness and low stress of machine tool castings under resin sand process conditions,the carbon equivalent is increased to more than 3.8%,the silicon-carbon ratio is controlled at 0.69~0.74,the appropriate addition of trace Sn,Cr,N and other alloys,the static high temperature liquid iron and the intensive inoculation treatment can achieve HT300 machine tool castings:Tensile strength≥300 MPa,hardness 200~240 HBW,elastic modulus 120~135 GPa,as-cast residual stress≤50 MPa.

关 键 词：高碳当量 高硅碳比 高刚度 低应力 均匀性 

分 类 号：TG242[金属学及工艺—铸造]