摘要
介绍了采用转炉→LF+VD→CC生产弹簧钢60Si2MnA的冶炼工艺;通过现场取过程样,实验室分析,确定了此工艺生产的弹簧钢夹杂物水平和夹杂物转变过程,钢液中的氧化物在精炼过程中由简单类型转变为多元复合夹杂物MgO-Al2O3-CaO-SiO2,部分夹杂物中含有CaS;对轧材进行夹杂物评级和低倍评级,检测轧材质量水平。通过旋转弯曲疲劳实验,分析疲劳试样断口夹杂物成分,确定引起疲劳断裂的夹杂物类型。
By using converter→LF＋VD→CC,smelting process of the 60Si2MnA spring steel was introduced.Through taking samples on site and analysing at laboratory,the producing process of spring steel inclusions level and inclusion of transition was determined.Oxide in molten steel in the refining process was changed from a simple type into multiple complex inclusions MgO-Al2O3-CaO-SiO2,and the part of inclusion complex includes CaS;Inclusion rating and Low magnification rating were detected and the quality level of spring steel rolled was tested.The type of inclusions caused the fatigue fracture was determined by rotating bending fatigue test and analysing fatigue fracture inclusion compositions.
出处
《热加工工艺》
CSCD
北大核心
2012年第11期56-59,共4页
Hot Working Technology
