摘要
采用50tEAF—LF（VD）-CC-缓冷工艺，通过采取强化电炉终点控制、改进电炉炉后调渣制度及精炼渣组成、连铸综合铸坯质量集成控制技术等措施，生产Ф350mm石油套管连圭垂件用关标4130（％：0．29～0．31C、0．25～0．28Si、0．51～0．54Mn、0．96～0．98Cr、0．19～0．20Mo、0．016—0．025Al）连铸圆坯，[O]、[N]分别为（12～14）×10^-6、（55～70）×10^-6，低倍组织≤1．0级，锻后非金属夹杂物A、B≤1．0级、C、D≤0．5级，锻件超声波探伤合格级别≥3级、尺寸公差及表面质量等质量指标均满足用户要求。
By 50tEAF-LF （ VD ）-CC-slow cooling process, and through strengthening the end-point control of electric furnace, improving the slag taking the measures such as modifying system and the composition of refining slag for electric furnace, completing the integration control technology of comprehensive quality of casting billets, 0350mm American-standard 4130 continuous casting round billets for oil casing connectors （ % ：0.29 - 0.31C ,0.25 - 0.28Si ,0.51 - 0. 54Mn,0. 96 - 0. 98Cr,0.19 - 0.20Mo, 0. 016 - 0. 025Al） are produced successfully, the contents of oxygen and nitrogen is respectively （12～14）×10^-6、（55～70）×10^-6 ,the macrostructure is less than grade 1.0, the non-metallic inclusions after forging is less than grade 1.0 for A and B, and less than grade 0.5 for C and D, the qualified grade in ultrasonic flaw detection is above grade 3, moreover the quality indexes such as dimensional tolerance and surface quality can goodly meet the requirements of users.
出处
《莱钢科技》
2013年第2期27-29,42,共4页
Laigang Science & Technology
关键词
电炉流程
石油套管连接件
4130圆坯
生产实践
electric furnace route
oil casing connectors
4130
round billets
production practice
