超高强度钢支耳激光增材制造加工研究  

Processing Study on Lugs of Ultrahigh-Strength Steel by Laser Additive Manufacturing

作　　者：李欣懋 张潮春 蔺广学 杜瑞锋 张明民 何雪 朱利 LI Xin-mao;ZHANG Chao-chun;LIN Guang-xue;DU Rui-feng;ZHANG Ming-min;HE Xue;ZHU Li(Chongqing Hongyu Precision Industry Group Co.,Ltd,Chongqing 402760,China)

机构地区：[1]重庆红宇精密工业集团有限公司,重庆402760

出　　处：《机械研究与应用》2024年第6期27-30,共4页Mechanical Research & Application

摘　　要：针对超高强度钢产品上支耳加工效率低下、成形质量较差等问题,该文采用激光增材制造技术,在超高强度钢产品上加工出材料分别为DT300、30CrMnSiNi2A、45和17-4PH的支耳,然后对热处理前、热处理后和精加工后的支耳根部交界面进行磁粉探伤,探究支耳根部成形效果,再对激光增材制造技术加工出的试块进行X光探伤,探究其内部成形效果。最终结果表明,当激光增材制造材料为DT300、30CrMnSiNi2A和17-4PH时的支耳成形质量较好,内部无明显缺陷;材料为45的支耳根部有明显裂纹产生,并且其内部有密集气孔,成形质量较差。通过研究与分析,为超高强度钢产品上支耳的加工提出了新的解决思路与方法,同时也为同类型产品的加工提供了理论基础和研究方法。Aiming at the low processing efficiency and poor forming quality of the upper lug of ultrahigh-strength steel products,in this paper,lugs with materials of DT300,30CrMnSiNi2A,45 and 17-4PH are respectively processed on ultrahigh-strength steel products through the laser additive manufacturing technology.Then in order to study the forming of lug bottoms,magnetic particle inspections are conducted on the interfaces of lug bottoms before heat treatment,after heat treatment and after finish machining respectively.Furthermore,X-ray fault detection is performed on test pieces processed by laser additive manufacturing technology so as to research the internal forming.The final results demonstrate that lugs processed by materials of DT300,30CrMnSiNi2A and 17-4PH are of better forming quality without obvious internal defects;while lugs of material 45 are inferior in forming quality with obvious cracks in lug bottoms and intensive internal air-holes.Through the research and analysis,a new idea and method for processing of the upper lug of ultrahigh-strength steel products is put forward,and the theoretical basis and research methods are provided for processing of the same type of products.

关 键 词：超高强度钢 支耳 激光增材制造 磁粉探伤 X光探伤 

分 类 号：TG142[一般工业技术—材料科学与工程]