摘要
石墨槽和耐火材料槽是有色冶金行业的出铜槽,现已被铜溜槽所取代。由于铜溜槽迎火表面长期受铜液铜渣的冲刷会失效,因此,需要在其溜槽表面制备一层耐高温冲刷涂层。采用等离子堆焊工艺在紫铜基体表面制备了Ni60焊层,应用3V成分分析光谱仪、超景深显微镜、里氏硬度计等测试手段,观察其微观形貌,分析元素成分,研究焊层组织对显微硬度的影响。研究表明:焊层与基体呈现良好的冶金结合,焊层微观组织梯度明显;含Si、B的Ni60粉末组织为网状枝晶结构,具有典型的快速凝固特征;焊层显微硬度高达650HV0.1,较紫铜基材明显提高,而Ni60的熔点在1 400℃,显然较紫铜1 083℃更耐高温冲刷。
Graphite groove and refractory groove are copper groove of Nonferrous metallurgy industry,has been replaced by copper chute.Due to the failure of the surface of the copper chute under the erosion of copper liquid and copper slag for long time.Therefore,it is necessary to prepare a layer of high temperature erosion resistant coating on the surface of the chute.In this paper,the Ni60 welding layer was prepared on the surface of red copper by plasma surface welding.By means of 3 V component analysis spectrometer,ultra-depth of field microscope and Richter hardness tester,the microstructure was observed,the element composition was analyzed,and the influence of the microstructure of the welding layer on the microhardness was studied.The results show that the welding layer has good metallurgical bonding with the matrix,and the microstructure gradient of the welding layer is obvious.The Ni60 powder structure containing Si and B is a reticular dendrite structure,which is typical of rapid solidification.The micro-hardness of the welding layer is as high as 650 HV0.1,significantly higher than that of the red copper substrate.However,the melting point of Ni60 is 1 400 ℃,which is obviously more resistant to high temperature erosion than that of red copper at 1 083 ℃.
作者
汪超
朱协彬
程敬卿
WANG Chao;ZHU Xiebin;CHENG Jingqing(School of Mechanical and Automotive Engineering,Anhui Polytechnic University,Wuhu 241000,China;Anhui Dingheng Remanufacturing Research Institute,Wuhu 241000,China)
出处
《安徽工程大学学报》
CAS
2020年第2期47-51,64,共6页
Journal of Anhui Polytechnic University
基金
国防科技重点实验室基金资助项目(6142005180208)
产学研基金资助项目(KH10000378)
安徽工程大学2018研究生教育创新基金资助项目。
关键词
铜溜槽
等离子堆焊
紫铜
高硬度
copper chute
plasma surfacing
copper
high hardness
