1、熔焊

　　1. Fusion welding

　　熔焊是在焊接过程中将工件接口加热熔化状态，不加压力完成焊接的方法。熔焊时，热源将待焊两工件接口处迅速加热熔化，形成熔池。熔池随热源向前移动，冷却后形成连续焊缝而将两工件连接成为一体。

　　Fusion welding is a method of heating the workpiece interface to a molten state during the welding process, without applying pressure to complete the welding. During fusion welding, the heat source rapidly heats and melts the interface between the two workpieces to be welded, forming a molten pool. The molten pool moves forward with the heat source and forms a continuous weld after cooling, connecting the two workpieces into one.

　　2、压焊

　　2. Pressure welding

　　压焊是在加压条件下，使两工件在固态下实现原子间结合，又称固态焊接。常用的压焊工艺是电阻对焊，当电流通过两工件的连接端时，该处因电阻很大而温度上升，当加热塑性状态时，在轴向压力作用下连接成为一体。

　　Pressure welding is the process of achieving atomic bonding between two workpieces in a solid state under pressure, also known as solid-state welding. The commonly used pressure welding process is resistance welding. When current passes through the connection end of two workpieces, the temperature rises due to the high resistance. When heated to a plastic state, the connection becomes integrated under axial pressure.

　　3、钎焊

　　3. Brazing

　　钎焊是使用比工件熔点低的金属材料作钎料，将工件和钎料加热到高于钎料熔点、低于工件熔点的温度，利用液态钎料润湿工件，填充接口间隙并与工件实现原子间的相互扩散，从而实现焊接的方法。

　　Brazing is a welding method that uses a metal material with a lower melting point than the workpiece as the brazing material. The workpiece and brazing material are heated to a temperature higher than the melting point of the brazing material but lower than the melting point of the workpiece. The liquid brazing material is used to wet the workpiece, fill the interface gap, and achieve atomic diffusion with the workpiece, thereby achieving welding.

　　焊接工艺和焊接方法等因素有关，操作时需根据被焊工件的材质、牌号、化学成分，焊件结构类型，焊接性能要求来确定。

　　The welding process and welding method are related factors, and the operation should be determined based on the material, grade, chemical composition, welding structure type, and welding performance requirements of the welded workpiece.

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