The graphitizing welding rod Z258 have been used in both aspectsnoted above.And low-alloy system of Mo, Ni, Cu is used to gain austenite andbainite in the braze seam of the latter.

• 上述两种工作使用的焊条都是石墨型球墨铸铁焊条Z258，后者还另外添加了Mo、Ni、Cu合余系统来影响焊缝组织转变。