在连铸生产中直接影响连铸机作业率和产品质量的关键备件之一是连铸二冷导辊。特别是板坯连铸机,由于工况条件恶劣,导辊耗量很大。因此,对于如何提高连铸辊的质量、延长使用寿命国外已做了大量的试验研究工作。生产实践证明,采用堆焊复合辊,生产工艺简单、质量稳定、成本低、寿命长,既能制造新辊又能修复旧辊,是理想的工艺措施。近年来我国从国外引进的几套板坯连铸设备,它们从结晶器下端的足辊起全部是采用堆焊复合制造的。可见堆焊已成 One of the key spare parts that directly affect the caster’s operating rate and product quality in continuous casting is the continuous casting of the second cold guide roller. Slab caster in particular, due to poor working conditions, guide roller consumption is large. Therefore, for how to improve the quality of continuous casting roller, extend the service life abroad has done a lot of experimental work. Production practice has proved that the use of surfacing composite roller, the production process is simple, stable quality, low cost, long life, both to create new roller repair old roller, is the ideal process. In recent years, China imported several sets of slab continuous casting equipment from the bottom of the mold from the foot roller are all made of surfacing composite. Visible surfacing has become