焊接电流对镍基铌复合堆焊层组织及性能的影响
Influence of Welding Currents on Microstructure and Performances of Ni-Nb Composite Surfacing Layers
摘 要
采用等离子堆焊技术在Z2CN18-10不锈钢表面制备了添加铌粉的镍基合金堆焊层，并对堆焊层的显微组织、硬度和耐磨性进行了分析，研究了焊接电流对堆焊层组织和性能的影响。结果表明：焊接电流为140 A时，堆焊层中可以较好地析出NbC颗粒，堆焊层具有良好的耐磨性；焊接电流为110 A时，堆焊层硬度可以达到509 HV0.3，但是堆焊层成型不好，耐磨性能也最差；当焊接电流增大到170 A时，堆焊层硬度明显降低，耐磨性相比140 A时的也有所降低。
等离子堆焊
NbC颗粒
显微组织
硬度
耐磨性
welding current
plasma surfacing
NbC particle
microstructure
hardness
wear resistance
Abstract
The Ni-based alloy surfacing layers with Nb powders were prepared on the surface of Z2CN18-10 stainless steel by plasma surfacing welding technology. The microstructure, hardness and wear resistance of the surfacing layers were analyzed. The influence of welding currents on the microstructure and performances of the surfacing layers was studied. The results show that when the welding current is 140 A, NbC particles can be precipitated well in the surfacing layer, and the surfacing layer has good wear resistance. When the welding current is 110 A, the hardness of the surfacing layer can reach 509 HV0.3. However, the surfacing layer is not well formed and the wear resistance is also the worst. When the welding current increases to 170 A, the hardness of the surfacing layer is significantly reduced, and the wear resistance is also reduced compared to that under 140 A.
中图分类号 TG146.1+5 TG456.2 DOI 10.11973/lhjy-wl201904006
所属栏目 试验与研究
基金项目 国家"973"课题（2011CB013402）；国家自然科学基金项目（11072045）
收稿日期 2018/12/13
修改稿日期
网络出版日期
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备注耿延朝(1985-),男,工程师,硕士,主要从事耐热、耐磨及耐蚀材料组织与性能研究工作,yanzhaogeng@163.com
引用该论文: GENG Yanzhao,DENG Dewei,TIAN Xin,SUN Qi. Influence of Welding Currents on Microstructure and Performances of Ni-Nb Composite Surfacing Layers[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2019, 55(4): 240～243
耿延朝,邓德伟,田鑫,孙奇. 焊接电流对镍基铌复合堆焊层组织及性能的影响[J]. 理化检验－物理分册, 2019, 55(4): 240～243
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【4】向永华,徐滨士,吕耀辉,等. 等离子熔覆快速成形铁基合金的设计及其组织和性能评价[J]. 中国表面工程,2010,23(4):39-43.
【5】董丽虹,徐滨士,朱胜,等. 等离子弧堆焊镍基复合粉末涂层材料[J]. 焊接学报,2005,26(1):37-40,82.
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【7】傅卫,王惜宝,陈国喜,等. 镍基WC等离子弧熔敷层的组织和高温磨损性能[J]. 焊接学报,2009,30(5):65-68.
【8】D'OLIVEIRA A S C M,VILAR R,FEDER C G. High temperature behaviour of plasma transferred arc and laser Co-based alloy coatings[J]. Applied Surface Science,2002,201(1/2/3/4):154-160.
【9】李强,雷廷权,孟庆昌,等. 激光熔覆Ni-Cr-B-Si-C合金涂层显微组织的透射电镜研究[J]. 中国激光,1999,26(4):372-378.
【10】李志,曲敬信,赵振业,等. 镍基合金涂层滑动磨损过程中磨屑的演变机理[J]. 润滑与密封,2003,28(3):48-49,53.
【11】STOTT F H. High-temperature sliding wear of metals[J]. Tribology International,2002,35(8):489-495.
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