美国一家铁路修理厂采用了一种修复摇枕心盘的新方法,该法是Chemtron焊接制品分部研制成功的。它有以下一些优点: (1)与老方法比,修理费用减少了60%; (2)修复心盘的使用寿命比老方法长3～4倍; (3)不需经常检查,用合金焊丝堆焊比用焊条堆焊要耐磨; A U.S. repair shop used a new method of repairing bolster mandrels, which was developed by Chemtron Welding Products Division. It has the following advantages: (1) Compared with the old method, the repair cost is reduced by 60%; (2) The service life of the repaired mandrel is 3 to 4 times longer than that of the old method; (3) Surfacing than welding with electrode wear to wear;