今年,我厂一大型热轧辊(见图)端部槽的一面超差了0.72毫米,其面积为220×170毫米~2。由于该轧辊(材质为60CrMnMo,重量4吨多,价值4.5万元)己全部加工完毕,并经过调质和表面淬火处理,所以不能采用堆焊或金属热喷涂等方法修复。经研究决定采用涂镀工艺修复,但是由于此轧辊超差量较大,已 This year, our factory a large hot roll (see Figure) end of the groove side of the poor by 0.72 mm, the area of ​​220 × 170 mm ~ 2. As the roll (made of 60CrMnMo, weight 4 tons, worth 45,000 yuan) has been fully processed and quenched and tempered and surface hardening, it can not be used surfacing or metal thermal spraying and other methods of repair. After the study decided to use the coating process to repair, but because of the larger than the amount of this roll has been