加热减应法焊修气缸盖□贺吉范气缸盖的典型损坏是在进、排气门之间出现裂纹。由于缺陷部位处于缸盖中间，四周刚性较大，焊后应力不易消除。因此，在焊补工艺选择上应力求避免白口，注意消除内应力。根据这种情况，可采用加热减应法氧炔焰气焊。这种方法就是在焊前和焊接... Heating reduction method welding repair cylinder head □ He Ji Fan cylinder head typical damage is in the intake and exhaust cracks between the door. Due to the defect in the middle of the cylinder head, around the larger rigidity, post-weld stress is not easy to eliminate. Therefore, the welding process selection should strive to avoid white, pay attention to eliminate the stress. According to this situation, heating reduction method can be used oxygen gas flame arrester. This method is before welding and welding ...