摘要
对服役超过6.5年的国外进口自航耙吸挖泥船泥泵外壳和衬板的化学成分、显微组织进行分析、断口形貌观察和能谱分析以及硬度测试。结果表明,挖泥船泥泵材料为25%Cr的高Cr白口铸铁,显微组织为珠光体+莱氏体+少量片状渗碳体,组织均匀,无大块渗碳体,接近共晶组织,渗碳体为高Cr合金渗碳体,Cr含量达到60%以上;泥泵材料的硬度在50～58 HRC之间保证了良好的耐磨性;确定了自主制造泥泵可选择的材料化学成分。
The shells and lining plates of wearable dredging pump of self-propelling trailing suction hopper dredger which has been serviced for more than 6.5 years were characterized by chemical analysis,OM analysis,SEM and EDS analysis of fracture and hardness tests.The results show that the material of the dredging pump is white cast iron with a high Cr content of 25% in weight,and the microstructure consists pearlite,ledeburite and a few lamellar cementite.The microstructure is close to eutectic structure and homogeneous without bulky cementite.The cementite is rich in Cr with a content of more than 60% in weight.The hardness of this dredging-pump is 50-58 HRC,which guarantees a good abrasive resistance.Moreover,the optional chemical composition of the self-determined dredging pump was also confirmed.
出处
《金属热处理》
CAS
CSCD
北大核心
2012年第11期55-58,共4页
Heat Treatment of Metals
关键词
泥泵
化学成分
断口
硬度
dredging pump
chemical composition
fracture
hardness
作者简介
作者简介：王志武（1963～），男，山西怀仁人，副教授，博士，主要从事钢的合金化研究、金属在长期高温条件下的组织与性能变化规律及其寿命研究、高温高压水蒸汽氧化机理的研究。E—mail：wzwl618@163.com
