共注射成型耐热钢/软磁不锈钢功能材料的研究  

Study on the functional materials of heat-resistant steel/soft magnetic stainless steel

作　　者：张书彬[1] 

机构地区：[1]重庆工商大学制造装备机构设计与控制重庆市重点实验室,重庆400067

出　　处：《功能材料》2017年第11期11086-11090,共5页Journal of Functional Materials

摘　　要：采用共注射成型和共烧结工艺,制备了耐热钢/软磁不锈钢功能复合材料。利用热膨胀仪对不同粉末装载量的12CrMoV耐热钢、KM-31软磁不锈钢进行烧结收缩和收缩速率测试;利用电子万能试验机、扫描电镜、金相显微镜分别对耐热钢/软磁不锈钢共烧结界面进行抗拉强度、拉伸断口、孔隙分布、金相组织进行测试,结果表明,通过调整粉末装载量,可以有效降低耐热钢与软磁不锈钢之间的烧结收缩率之间的差异,提高2种材料的共烧结匹配度,从而提高共烧结界面结合强度;67%(体积分数)耐热钢/57%(体积分数)软磁不锈钢共烧结试样抗拉强度最高,可以达到309.7MPa;12CrMoV耐热钢/软磁不锈钢共烧结界面相容性良好,界面过渡组织为珠光体和奥氏体混合相。This paper prepared heat-resistant steel/soft-magnetic stainless steel functional composite by co-injection and co-sintering techniques.Sintering shrinkage and shrinkage rate of 12 CrMoV heat-resistant steel and soft-magnetic steel with various loaded powder amount were characterized by thermal dilatometer.Electronic universal-testing machine,scanning electron microscopy and metallurgical microscopy were used to detect tensile strength,tensile fracture,pore distribution and microstructure of the interface of co-sintering prepared heat-resistant steel/soft-magnetic steel.Results show that by adjusting powder loaded amount,the difference between sintering shrinkage of heat-resistant steel and soft-magnetic steel can be effectively reduced;therefore,the mismatch of co-sintered materials is reduced and interfacial bonding strength is then improved.67 vol% heat-resistant steel/57 vol% soft stainless steel co-sintered samples displayed the highest tensile strength of 309.7 MPa;the co-sintered presents good interfacial compatibility with interfacial transition microstructure of pearlite and austenite mixture.

关 键 词：共注射成型 共烧结 耐热钢 软磁 界面相容性 

分 类 号：TF124.37[冶金工程—粉末冶金]