摘要
生产的国标牌号Y1Cr13高硫易切削不锈钢,工艺路线为:20 t EAF-AOD-LF-模铸.通过设计合理的精炼渣系,使精炼渣碱度控制在R=1.4~1.7,稳定了喂硫收得率,成品硫含量ω(S)0.22!~0.26!,喂硫收得率维持在75!以上.为防止后续加工过程中出现皮下发纹的质量缺陷,精炼后期进行夹杂物变形处理,采用氩气保护低温浇注,浇注过热度控制在45~55℃,保证了整个检验塔型上发纹数小于3条,满足了用户的使用要求.
The production process flowsheet for high sulphur free cutting stainless steel Y1 Cr13 is 20 t EAF-AOD-LF-mold casting. Through the design of reasonable refining slag system,the basicity of refining slag is controlled to the R = 1. 4 ~1. 7 which stabilizes the stability of the fed sulfur yield,finished sulfur content in the ω（ S） is 0. 22 %to 0. 26 %,and the fed sulfur rate maintains at 75 !or more. In order to prevent the subsequent processing from having subcutaneous hair-line quality defects,the refining with feeding calcium treatment at last stage is conducted,argon is used to protect the low temperature casting,and the casting superheat is controlled to between45 ~ 55℃ to ensure that the entire test tower has the number of hairlines less than 3 and to meet the user＇s requirements.
作者
崔利民
张欢欢
赵雷
陈保梁
CUI Li-min;ZHANG Huan-huan;ZHAO Lei;CHEN Bao-liang(AVIC SHANG DA Super Alloys Co.LTD,Xingtai,054800,P.R.China;Hebei Engineering Research Center for Special Alloy regeneration,Xingtai,054800,P.R.China)
出处
《南方金属》
CAS
2018年第3期30-33,7,共5页
Southern Metals
关键词
易切削钢
精炼渣系
皮下发纹
碱度
free cutting steel
refining slag system
subcutaneous hair-line
basicity
