Al含量对K418合金的TCP相析出规律的影响  

Effect of Al Content on Precipitation Regularity of TCP Phase in K418 Alloy

作　　者：王璞[1] 罗俊义[1] 刘宗利 

机构地区：[1]安泰科技股份有限公司精细金属制品分公司,北京101318 [2]舍弗勒贸易(上海)有限公司北京办事处,北京100020

出　　处：《物理测试》2013年第3期9-13,共5页Physics Examination and Testing

摘　　要：利用Thermo-Calc软件计算得出Al含量对K418合金的TCP相析出规律的影响。结果表明:K418合金析出相为MC相、M23C6相、γ相、γ′相、σ相、μ相、α-Cr相、M3B2相和液相。Al质量分数在6.5%～5.5%成分范围内,碳化物、硼化物、液相线的含量变化较小,有少量α-Cr相析出。随Al含量减少,TCP相析出含量而减少且呈阶段性变化,在710℃以下以μ相析出为主;在710℃和840℃之间以σ相析出为主。降低σ相析出含量,Al质量分数建议控制在6.0%～5.5%范围之内。降低μ相和TCP相析出含量,Al含量建议接近下限。综合考虑,为减少K418合金TCP相析出,Al质量分数建议尽量接近下限5.5%,而实际生产中制定Al含量的目标值还需考虑合金使用强度、冶炼烧损量和脱氧消耗量。The effect of Al content on the precipitation regularity of TCP phase was studied by the calculation results of Thermo-Calc software.The results indicated that,the precipitation phase of K418 alloy was MC phase,M23C6 phase,γ phase,γ′ phase,σ phase,μ phase,α-Cr phase,M3B2 phase and liquid phase.The content of carbide,boride and liquid phase was almost no change and the content of α-Cr phase was little as the Al content was between 6.5% and 5.5%.The precipitation content of TCP phase was decreased and presented stage variation as the Al content decreased.The content of TCP phase was mainly precipitated μ phase below 710 ℃ and σ phase between 710 ℃ and 840 ℃.The σ phase disappeared as the Al content was between 6.0% and 5.5%.The content of μ phase and TCP phase was little as the Al content was close to 5.5%.For decreasing TCP phase content of K418 alloy,the Al content should be as close as to the minimum Al content of 5.5%.But strength,melting loss,and deoxidized amount should also be consideredfor the determination of the target value of Al element.

关 键 词：THERMO-CALC软件 K418合金 AL含量 TCP相 析出规律 

分 类 号：TG111.5[金属学及工艺—物理冶金]