摘要
为了改善镀锌钢板点焊电极的寿命,选用铬锆铜球型点焊电极,以TiC作为熔敷材料,进行了点焊电极表面电火花沉积TiC工艺试验。通过正交试验考察了沉积工艺参数(电容、基体电极转速、振动频率、沉积时间)以及前处理与后处理对沉积层厚度的影响。结果表明,电容是影响电火花沉积层厚度的主要因素;振动频率对沉积层厚度有一定的影响;基体电极转速、沉积时间对沉积层厚度影响较小。试验条件下最佳的工艺参数是:电容量30000μF,基体电极转速1320r/min,振动频率50Hz,沉积时间120s。前处理(沉积前清洗)对其厚度影响很小。后处理(沉积后700℃×30min退火)促进元素扩散并减小沉积层厚度。
In order to improve the life of spot-welding electrode for zinc-coated steel, electrospark deposition（ESD） processes were studied taking TiC as fusing material and CrZrCu as spot-welding electrode. ESD parameters （such as capacitance, deposition time, electrode rotate speed and vibratory frequency） pre-treatment as well as post-treatment of the substrate were investigated by means of orthogonal experiment. The results indicate that the capacitance is the most important factor that influences the thickness of ESD TiC coating, the vibratory frequency is less important, the rotate speed of electrode and the depositing time influence slightly. The optimized parameters under the test conditions are capacitance 30 000μF, electrode rotate speed I 320r/min, vibratory frequency 50Hz, depositing time 120s. Pre-treatment to improve the interface between coating and substrate has a weak influence on the thickness of the coating. Post-treatment （annealing at 700℃ ×30 min after deposition） can promote elements diffusing and decreases the thickness of the deposition coating.
出处
《热加工工艺》
CSCD
北大核心
2007年第3期46-49,共4页
Hot Working Technology
基金
国家自然科学基金资助项目(50575069)
教育部留学回国人员科研启动基金资助项目(教外司留[2004]527)
湖北省教育厅创新团队资助项目(2003T015)
关键词
点焊电极
碳化钛
电火花沉积
沉积层
厚度
spot-welding electrode
TiC
electrospark deposition
coating
thickness
