摘要
以国内某公司自主生产的H13型(H13A、H13R、JB11U、JB13U)热作模具钢作为试验材料,采用直读光谱仪、金相显微镜、扫描电镜等方法,研究了不同H13型模具钢锻后退火态、淬回火态的显微组织、晶粒度及淬回火后的力学性能。结果表明:H13型模具钢中,H13A钢晶粒最细,达到9.5级,淬回火态硬度最高,为50.0 HRC,纵向冲击功最高,Ak达到47.4 J;JB11U钢具有较好的组织均匀性,横向、纵向冲击功Ak均达到43 J以上,冲击功纵横比达到了0.99,显示出良好的等向性;H13A、H13R、JB13U钢退火态、淬回火态组织出现了带状偏析和一次共晶碳化物,这是导致其性能下降的主要原因。
Taking the hot work die steel of H13(H13A,H13R,JB11U,JB13U)produced by some domestic company as the test material,the microstructure,grain size and mechanical properties of different H13 die steels in annealed and tempered states were studied by direct reading spectrometer,metallographic microscope and scanning electron microscope.The results show that,among the H13-type die steels,the grain size of H13A steel is the smauest,reaching 9.5 grade.The hardness of the steel in quenched tempering state is the highest,reaching 50.0 HRC,the longitudinal impact work is the maximum,and Ak reaches 47.4J.JB11U steel has good microstructure uniformity.The Akof transverse and longitudinal impact work is above 43J,and the aspect ratio of impact work is 0.99,which shows good isotropism.Band segregation and primary eutectic carbide appeared in annealed and tempered microstructure of H13A,H13R and JB13U steel is the main reason for the degradation of their properties.
作者
陈杰
栾道成
胡志华
陈宝书
任阳
李缘
王正云
CHEN Jie;LUAN Daocheng;HU Zhihua;CHEN Baoshu;REN Yang;LI Yuan;WANG Zhengyun(Materials Science and Engineering,School of Xihua University,Chengdu 610039,China)
出处
《热加工工艺》
北大核心
2019年第18期146-150,共5页
Hot Working Technology
基金
四川省重点研发项目(18ZDYF1304)
四川省科技支撑项目(2018GZ0053,2017GZ0073)
四川省高校重点实验室开放基金项目(szjj2016-055)
四川省科技创新苗子工程项目(2019130,2019133)
西华大学创新基金资助项目(ycjj2019029,ycjj2019032)
关键词
H13型模具钢
显微组织
冲击韧性
电渣重熔
H13-type die steel
microstructure
impact toughness
electroslag remelting
