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在修理工作中,有时会遇到因抱轴(瓦片随同曲轴旋转)而使主轴瓦座严重刮伤的缸体。对于这种缸体,我们采用抗裂性能和切削性能良好的铸308焊条(纯镍铸铁电焊条)焊修,效果良好,可以保证焊修质量。现将我们的修复经验介绍如下。一、焊修工艺焊前需将施焊部位清理干净,不得有油垢,可用气焊枪加热至200～300℃除油。采用交流或直流反接施焊。焊接电流大小要适当,可比焊低碳钢焊条时略小一些,选用焊条直径为3.2毫米
In the repair work, sometimes encountered due to the shaft (the tile with the crankshaft rotation) and make the main bearing block serious scratches the cylinder. For this kind of cylinder body, we use cast 308 welding rod (pure nickel cast iron welding rod) with good crack resistance and cutting performance to weld and repair well, which can ensure the welding quality. Now we repair the experience described below. First, the welding repair process Before welding the site should be clean welding parts, may not have grease, gas welding torch can be heated to 200 ~ 300 ℃ degreasing. Use AC or DC reverse welding. Welding current size should be appropriate, slightly lower than the welding of mild steel electrodes, the choice of electrode diameter of 3.2 mm