摘要
进行了Q235钢表面的预制粉末覆层的等离子熔覆,研究了等离子熔覆工艺对熔覆层表面成形的影响,在此基础上得到了合适的熔覆工艺参数.进行了熔覆层组织的金相分析及熔覆层显微硬度测量与分析.结果表明,熔覆电流、焊枪摆动频率、熔覆速度的改变均能引起热输入的明显变化,影响熔覆层组织形态,基体熔化程度,以及界面的结合状态,进而影响熔覆层的耐磨性及耐腐蚀性.试验条件下的最佳熔覆工艺参数为熔覆电流130 A,熔覆速度5 cm/m in,焊枪摆动幅度4 mm,摆动频率0.4 Hz.
The intermetallic compound Fe3Al was prepared by plasma arc surface remelting,in which the mixture of Al powder and Fe powder was coated on the surface of Q235 steel.The effect of plasma arc surfacing parameters on form of coating was studied,and appropriate process parameters were obtained.The microstructures and the measured Vickers hardness of the coating were analyzed.The results indicate that the variation of process parameters such as current,swing frequency of welding torch and travel speed closely relates with heat input,which has influence on microstructure,melting state of substrate,interface bonding of substrate and coating,and thus the corrosion and wear resistance of the coating is improved greatly.The optimum surfacing parameters are a current of 130 A,a travel speed of 5 cm/min,a swing amplitude of 4 mm and a frequency of 0.4 Hz under this experiment condition.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2010年第12期85-88,共4页
Transactions of The China Welding Institution
