【作者】 赵俊学； 唐雯聃； 仇圣桃； 李小明； 宋书雅；

【Author】 ZHAO Jun-xue~1 TANG Wen-dan~1 QIU Sheng-tao~2 Li Xiao-ming~1 SONG Shu-ya~1 (1.School of Metallurgical Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China 2.National Engineering Research Centre of Continuous Casting Technology, Central Iron and Steel Research Institute,Beijing 100081,China)

【机构】 西安建筑科技大学冶金工程学院； 钢铁研究总院连铸技术国家工程研究中心；

【摘要】 本文采用金相显微镜和扫描电镜对某厂34CrMo1A钢铸锭中夹杂物的种类和分布进行了分析。夹杂物主要为Al₂O₃-CaO的脆性夹杂,这是影响铸锭热疲劳强度的主要原因;此外还有少量其它夹杂,其中大尺寸的CrC-MoC对钢的韧性影响最大。T[0]和夹杂物在铸锭中分布不均,锭身的T[0]最高且夹杂物数量最多,而尾部的夹杂物含量最大,针对该现象本文补充了夹杂物集中原因的分析。认为要改善铸锭的纯净度,需要改良精炼工艺、提高浇铸水平。更多还原

【Abstract】 In this paper the inclusions types and distribution in 34CrMo1A steel ingot of a factory was analyzed by metallographic microscope and scanning electron microscope.The inclusions were mainly Al₂O₃-CaO brittle inclusion,which was the main factor influencing the ingot thermal fatigue strength.In addition there were a small amount of other inclusions,in which the large size CrC- MoC was the most influence on the toughness of steel.T[O]and inclusion in ingots were uneven.In ingot body,the T[O]was highest and the inclusion number was maximum;while the content of inclusions on the tail were maximum.Against the phenomenon this paper supplemented analysis about the reason of inclusion concentration.The conclusion is that improving the ingot purity,need to improve refining process and improve the level of casting.更多还原