悬索桥复合索鞍滚轴选材技术研究  

Study on Material Selection of Roller for Composite Cable Saddle of Suspension Bridge

作　　者：苏兰 石红昌 黄安明 陈龙 SU Lan;SHI Hongchang;HUANG Anming;CHEN Long(Deyang Tengen Heavy Industry Co.,Ltd.,Deyang 618000,China)

机构地区：[1]德阳天元重工股份有限公司技术部,四川德阳618000

出　　处：《热加工工艺》2025年第2期139-142,146,共5页Hot Working Technology

摘　　要：滚轴是悬索桥复合索鞍中的关键构件之一,对力学性能等方面要求较高。根据绿汁江特大桥复合索鞍需求,选择优选后的12Cr13、30Cr13不锈钢材料作为试验对象,通过一系列的试验,系统对比了两种钢的物相构成、微观组织及力学性能,从而为悬索桥复合索鞍滚轴的选材提供数据支撑。结果表明,经过淬火(油淬)+低温回火热处理后,12Cr13的微观组织为回火马氏体、残余奥氏体和少量铁素体。铁素体的存在保证了12Cr13的韧塑性,使其具有良好的综合力学性能,完全满足绿汁江悬索桥复合索鞍滚轴的选材要求。30Cr13的微观组织则为回火马氏体及残余奥氏体。与12Cr13相比,其组织均匀性提高,并拥有更高的强度,但其塑韧性不能满足设计要求。The roller is one of the key components in the composite cable saddle of suspension bridge,which has high requirements for mechanical properties.According to the requirements of composite cable saddle of lvzhijiang bridge,12Cr13 stainless steel and 30Cr13 stainless steel were selected as the experimental objects.Through a series of experiments,the phase composition,microstructure and mechanical properties of the two steels were systematically compared,so as to provide data support for the material selection of composite cable saddle roller of suspension bridge.The results show that the microstructure of 12Cr13 is tempered martensite,retained austenite and a small amount of ferrite after quenching(oil quenching)+low temperature reheating heat treatment.The existence of ferrite ensures the toughness and plasticity of 12Cr13,makes it have good comprehensive mechanical properties,and fully meets the material selection requirements of composite cable saddle roller of lvzhijiang suspension bridge.The microstructure of 30Cr13 is tempered martensite and retained austenite.Compared with 12Cr13,its microstructure uniformity is improved and 30Cr13 has higher strength,but its plastic and toughness can not meet the design requirements.

关 键 词：复合索鞍滚轴 不锈钢 热处理 显微组织 力学性能 

分 类 号：TG161[金属学及工艺—热处理]