气缸体裂纹的氧—乙炔冷焊,是用两把气焊炬同时工作,一把进行焊接,一把对“加热减应区”进行加热,焊后在室温下冷却。“加热减应”即加热气缸体某一局部,使焊补区应力减小,避免产生裂纹。该工艺设备简单、成本低、效率高、变形小,焊缝金相组织好,加 Cylinder block of oxygen - acetylene cold welding, is to use two gas torches at the same time work, a welding, a “heating zone” heating, after welding at room temperature cooling. “Heating should be reduced,” that is, heating a certain part of the cylinder block, so that welding stress reduction zone, to avoid cracks. The process equipment is simple, low cost, high efficiency, small deformation, the microstructure of the weld is good, plus