How to start welding
Welding, also known as welding and splicing, is a manufacturing process and technique for joining metals or other thermoplastic materials such as plastics in a heated, high temperature or high pressure manner.
Metal welding, according to the characteristics of its process, there are three major categories of welding, pressure welding and brazing.
It is a method of heating the workpiece interface to a molten state during the welding process and completing the welding without pressure. During fusion welding, the heat source rapidly heats and melts the interface of the two workpieces to be welded to form a molten pool. The molten pool moves forward with the heat source, and after cooling, forms a continuous weld to join the two workpieces into one body.
Under pressure conditions, the two workpieces achieve atomic bonding in the solid state, also known as solid state welding. The commonly used pressure welding process is resistance butt welding. When the current passes through the connection end of the two workpieces, the temperature rises due to the large resistance, and when heated to the plastic state, the connection is integrated under the axial pressure.
The metal material having a lower melting point than the workpiece is used as a brazing material, and the workpiece and the brazing material are heated to a temperature higher than the melting point of the brazing material and lower than the melting point of the workpiece, and the workpiece is wetted by the liquid brazing material, filling the interface gap and realizing the atomic interaction with the workpiece. The method of mutual diffusion, thereby achieving welding.
The temperature of the molten pool directly affects the quality of welding, the temperature of the molten pool is high, the molten pool is large, the fluidity of molten iron is good, and it is easy to fuse. However, when the temperature is too high, the molten iron is easy to smash, and the back surface of the double-sided forming is easy to burn through. The weld is not difficult to control, and the joint plasticity is reduced, and the bending is easy to crack. When the temperature of the molten pool is low, the molten pool is small, the molten iron is dark, the fluidity is poor, and defects such as incomplete penetration, unmelting, and slag inclusion are easily generated.
The temperature of the molten pool is closely related to the welding current, the diameter of the welding rod, the angle of the welding rod, the burning time of the arc, etc. The following measures are taken to control the temperature of the molten pool for relevant factors.
Cell: 0086-130 930 23772 (What's app)
Tel: 0086-188 0059 6372
Fax: 0086-510-6879 2172
E-mail: sales@ebcastworld.com
Eternal Bliss Alloy Casting & Forging Co.,LTD.
Add.: J-Sci-Tech Park, Binhu District,Wuxi,214122, Jiangsu,China
Skype ID:julia.zhu26
QQ: 2170396403
没有评论:
发表评论