Melting Temperature And Forming Process Of Stainless Steel Pipe Elbows
The melting temperature of Stainless Steel Weld Elbow is also called the melting point. It is an important indicator that reflects the melting properties of the protective slag and has a great influence on the slag film thickness and the heat flow of the crystallizer. Under normal circumstances, the slag film thickness increases with the increase of the melting temperature of the protective slag. In addition, the proportion of the thermal resistance of the billet shell to the thermal resistance of the slag film is directly affected by the melting temperature of the protective slag. The higher the melting temperature, the smaller the proportion of the thermal resistance of the billet shell, and the larger the proportion of the thermal resistance of the slag film. The left and right extrusion punches in hydraulic forming should maintain the accuracy of synchronous movement. The synchronization of the punch movement affects the symmetry of the deformation and has a stronger effect on the deformation size. If the punch movement cannot be synchronized, a large shear deformation will occur in the transition area, which is not conducive to large deformation. Therefore, measures should be taken to synchronize the movement accuracy.
In order to ensure that there is always a liquid slag film of corresponding thickness along the entire length of the crystallizer, the melting temperature of the protective slag should be lower than or equal to the surface temperature of the billet shell at the lower mouth of the crystallizer, which is related to the length of the crystallizer, the billet drawing speed and the amount of cooling water. It is generally believed that when the surface temperature of the billet at the inlet and outlet of the crystallizer is 1250℃, the slag can be kept moving along the billet shell in the crystallizer and the liquid slag layer of corresponding thickness can always be maintained. In continuous casting production, the melting temperature of the protective slag is usually controlled below 1200℃, and the melting temperature of most slab continuous casting protective slags is controlled between 1050-1200℃.
In order to improve the welding quality, the ends are all beveled, leaving corresponding viewpoints and corresponding edges. This requirement is also relatively strict. There are rules for how thick the edge is, how many viewpoints are there, and the error planning. The surface quality and mechanical properties are basically the same as those of the pipe. In order to facilitate welding, the steel type of the pipe fittings and the connected pipes is the same.
All stainless steel elbows are subject to surface treatment. The iron oxide on the inner and outer surfaces is shot blasted off and then painted. This is for export and import needs. In addition, it is also for the convenience of transportation in China to avoid rust and oxidation. This work must be done. For small pipes, such as import and export, wooden boxes are required.
