Brazing vs Welding- Difference Between Brazing and Welding

What is brazing ?

铜管是一个连接过程，它通过加热到合适的温度并使用液体温度高于450摄氏度和低于基础材料的固体温度，从而产生材料合并。通过毛细管作用，将填充金属拉到关节紧密拟合表面之间的间隙中。为了达到完美的接头，应兼容填充物和母体材料，并且关节的设计应结合最小间隙，并将其绘制为燃烧填充金属的最小间隙。在加热过程中，必须通过通量或保护气氛对接头进行适当清洁和保护，以防止过量氧化。有很多钎焊的方法，它们在将热量施加热量的方法上，尤其是关节区域。其中包括火炬悬挂，炉子悬挂，诱导悬挂，浸入浸泡和抗阻力。

What is Welding :

Welding is the most prominent process for joining large components into complex assemblies or structures. A necessary condition for welding is that the two or more surfaces to be joined must be brought into intimate contact. When fusion takes place, the joint is achieved by melting of two or more workpiece materials in a localized region. In contrast, the solid-state joining processes rely on plastic deformation of the surface asperities along the contact surface representing the original weld interface or the impending weld joint.

焊接过程的成功不仅取决于选择适当的焊接条件或过程参数的选择，还取决于关节配置和焊接位置。实际应用中焊接结构上施加的载荷通过焊接接头从一个成员转移到另一个成员。

Difference Between Brazing and Welding

Brazing	Welding
Brazing are weaker than welding joints but stronger than soldering joints. This can be used to bear the load up to some extent.	Welding joints are strongest joints used to bear the load. Strength of the welded portion of joint is usually more than the strength of base metal.
铜关节比焊接强，但比焊接弱。	It forms strongest mechanical joint which can withstand with high working stress.
Less skill require to join metal.	High skilled labour required
Temperature required is 3800 degree Centigrade in Welding joints.	Temperature may go to 600 degree Centigrade in Brazing joints.
No change in mechanical properties.	The properties of base metal may change.
Work pieces are heated but below their melting point.	Work piece to be joined need to be heated till their melting point.
Heat treatment is generally required to eliminate undesirable effects of welding.	No heat treatment is required after brazing.