日本三级在线视频-日本色熟女乱伦视频-日本色一区-日本色哟-日本色综合网-日本涩涩网站

The significant difference between vacuum brazing furnace brazing and fusion welding methods is that during vacuum brazing furnace brazing, the work is often heated as a whole (such as brazing in the furnace) or uniformly heated around the brazing seam in a large area. Therefore, the relative deformation of the workpiece and the residual stress of the joint are much smaller than fusion welding, making it easier to ensure the precise size of the workpiece. And the selection range of brazing materials is relatively wide. In order to prevent changes in the parent structure and properties, brazing materials with relatively low liquidus temperature can be selected for vacuum brazing....

Cleaning of the vacuum pump in the vacuum sintering furnace: As the operation of the vacuum pump in the vacuum sintering furnace deteriorates, it is necessary to check the degree of turbidity and viscosity through the oil window, and replace the pump oil in the vacuum sintering furnace in a timely manner. The cycle for replacing the pump oil in the vacuum sintering furnace: change the oil and clean it every six months....

1. Surface preparation of workpiece: In order to ensure the formation of uniform and high-quality brazed joints, oil stains and oxides on the workpiece surface must be removed before welding. In order to improve the brazing ability of some materials or increase the wettability of brazing fillers to the base metal, metal plating is often required on the base metal surface. (1) Clean up oil pollution....

At present, China's economy is in the development period of transformation and reform. At this time, many traditional aluminium products processing plants are facing many challenges due to the downturn and pressure of the economic situation. With the demand of real estate industry and industrial aluminium in China in the past, the sales of aluminium profile industry and aluminium profile radiator manufacturers have been booming all the way. But with the regulation of the real estate market by the state in recent years...