【摘要】 采用金相、SEM和EDS分析方法,研究了时效及变质处理后高锰钢的析出相演变行为及性能。研究表明:随着时效温度的升高,析出相由粒状转变为针状,在580℃时效1 h时,组织上出现了珠光体转变。时效时间延长到2 h后,460℃时效粒状析出相转变为针状,并且也发生了珠光体转变。520℃和580℃时效2 h和时效1 h的组织相同。通过EDS研究表明,粒状析出相为亚稳相,针状析出相为稳定相。520℃时效1 h时,冲击断口有大量韧窝,磨损量最少,磨损形貌基本没有剥落。更多还原

【Abstract】 The evolution and properties of precipitated phase of high manganese steel with aging and modification treatment were studied by means of metallographic analysis,SEM and EDS.The result shows that with an increase in aging temperature,needle-like precipitated phases were changed to be granular.After 1 hour aging treatment at 580 ℃,there was pearlite on the texture.When the aging time increased to 2 hours,at 460 ℃,the needle-like precipitated phases were also changed to be granular and there was pearlite in the matrix.After comparison,it is found that the microstructure after 1 hour of aging treatment at a temperature of 520 ℃ and 580 ℃ are the same with that after 2 hours of ageing.The EDS study indicated that granular precipitated phases are metastable,while needle-like precipitated phases are stable.A large number of dimples can be observed in the impacted fracture with little abrasion loss after 1 h aging treatment at 520 ℃.更多还原