HANYouNG温控器ND4-pkNR07

施耐德双电源watsga-100/4p           watsgb-100/4p                                 watsnb-63a/4p施耐德双电源watsga-125/4p           watsgb-125/4p                                 watsnb-80a/4p施耐德双电源watsga-160/4p           watsgb-160/4p                                 watsnb-100a/4p施耐德双电源watsga-200/4p           watsgb-200/4p                                 watsnb-160a/4p施耐德双电源watsga-250/4p           watsgb-250/4p                                 watsnb-250a/4p施耐德双电源watsga-320/4p           watsgb-320/4p                                 watsnb-400a/4p施耐德双电源watsga-400/4p           watsgb-400/4p                                 watsnb-630a/4p施耐德双电源watsga-500/4p           watsgb-500/4p                                 watsnb-800a/4p施耐德双电源watsga-630/4p           watsgb-630/4p                                 watsnb-1000a/4p

搪玻璃面的焊缝应无明显的凸起。在这里告诉大家一个专业知识，金属基体凸起部位（也就是外圆弧部位）的搪玻璃层在较高温度下，由于搪玻璃层和金属基体热膨胀系数的差异，会受到拉应力的作用，而搪玻璃层是脆性材料，抗拉应力的性能很差。在金属基体上尽量减少凸起部位的出现，凸起的焊缝应尽量磨平。搪玻璃面不应有明显的凹坑。凹坑是修磨铁胎金属基体表面的缺陷留下的，凹坑越多，说明所用的钢板的表面质量差，这种钢板不适宜用于搪玻璃设备。