Question

电阻焊和摩擦焊有何异同

Answer 1

摩擦焊机原理：
在压力作用下，通过待焊
工件的摩擦界面及其附近温度
升高，材料的变形抗力降低、
塑性提高、界面氧化膜破碎，
伴随着材料产生塑性流变，通过界面的分子扩散和再结晶而实现焊接的固态方法。
摩擦焊通常由如下四个步骤构成：
1.机械能转化为热能
2.材料塑性变形
3.热塑性下的锻压力
4.分子间扩散再结晶

摩擦焊优势：
摩擦焊相对传统熔焊最大的不同点在于整个焊接过程中，待焊金属获得能量升高达到的温度并没有达到其熔点，即金属是热塑性状态下实现的类锻态固相连接。
相对于传统熔焊，摩擦焊具有焊接头质量高，能达到焊缝强度与基本材料等强度，焊接效率高、质量稳定、一致性好，可实现异种材料焊接等。

Friction welding machine principle:
Under pressure, to be welded by
Friction interface temperature of the work piece and its vicinity
Increased deformation resistance of the material is reduced,
Plasticity increased interfacial oxide film broken,
Along with the material to produce plastic flow interface by molecular diffusion and Re crystallization Solid-state welding method.
Friction welding is generally constituted by the following four steps:
1. the mechanical energy into heat
2. Plastic Deformation
3. The thermoplastic forging force under
4. molecular diffusion and re crystallization

Friction Welding Advantages:
Compared with the traditional friction welding fusion biggest difference is that the entire welding process, the metal to be welded to gain energy to reach elevated temperatures did not reach its melting point, that is, the metal is at a thermoplastic state class that implements the forged solid connection.

Compared with traditional fusion welding, friction welding with high quality welded joints, weld strength and intensity to achieve the basic materials, high welding efficiency, stable quality, consistency, enabling dissimilar material welding.

Answer 2

在焊接热的产生方法上。
电阻焊是利用大电流通过工件的焊接区域时克服工件电阻所产生的电阻热把工件溶接在一起的。
摩擦焊是利用两工件紧压在一起再廷接触平面做相对运动相互摩擦产生的热量把两工件溶焊在一起的。
从焊接应用上分。
电阻焊主要是焊接所有形式特性适合用电阻焊焊接的工件。
摩擦焊也是一样。