我厂ПН—750型空气錘錘杆曾产生严重的裂紋,情况見图1,裂紋在錘杆圓周上是連續的,大部分已裂透。在苏联专家的指导下,我們将錘杆裂紋进行了焊接。到現在,焊接的錘杆已使用将近一年。在使用当中,不仅是自由鍛工作,而且进行模鍛工作。曾經鍛造过一批零件(500～700),按照理論上的計算,这批零件要2.5吨模鍛錘才能胜任。以上情况說明,錘杆焊接質量及使用 I plant ПН-750 air hammer hammer had a serious crack, the situation shown in Figure 1, the crack in the hammer circumference is continuous, most have cracked. Under the guidance of Soviet experts, we welded the hammer rod crack. Until now, welding hammer has been used for nearly a year. In use, not only free forging work, but also forging work. Once forged a number of parts (500 ~ 700), according to the theoretical calculations, these parts to 2.5 tons forging hammer to be competent. The above description, hammer welding quality and use