CAJ | 학술논문

采用激光扫描共聚焦显微镜（ LEXT）、QUNETA-400扫描电镜、JEM-2010高分辨率电子显微镜研究了不同温度淬火、回火的H13钢的显微组织，包括碳化物类型、形貌和分布，以及组织与性能的关系。研究表明， H13钢的最佳淬火温度为1010℃。 H13钢的淬火态组织为条片状马氏体，于200～650℃回火后的组织为回火马氏体加碳化物，或回火托氏体加碳化物。在520℃回火出现二次硬化现象，二次硬化可能是由Fe、Cr、C原子的复合偏聚区（ G．P．区）造成的。
채용격광소묘공취초현미경（ LEXT）、QUNETA-400소묘전경、JEM-2010고분변솔전자현미경연구료불동온도쉬화、회화적H13강적현미조직，포괄탄화물류형、형모화분포，이급조직여성능적관계。연구표명， H13강적최가쉬화온도위1010℃。 H13강적쉬화태조직위조편상마씨체，우200～650℃회화후적조직위회화마씨체가탄화물，혹회화탁씨체가탄화물。재520℃회화출현이차경화현상，이차경화가능시유Fe、Cr、C원자적복합편취구（ G．P．구）조성적。
The microstructure , including type , morphology and distribution of carbide , and the relationship between microstructure and performance for H 13 steel quenched from different temperatures and tempered at different temperatures were investigated by means of LEXT, QUNETA-400 SEM and high evolution TEM.The results show that the optimum austenitizing temperature for hardening of H13 steel is 1010 ℃, and that the as-quenched microstructure is lath martensite , and the microstructure after tempering at 200 to 650 ℃ is tempered martensite plus carbide or tempered troostite plus carbide .Furthermore, when tempered at 520 ℃, the H13 steel will offer secondary hardening effect which results perhaps from composite aggregation of Fe , Cr and C atoms (G.P.zone).