First of all, we must carry out a reasonable mold planning. Do not be too different in thickness. The shape must be symmetrical. Regarding the large deformation molds, we must master the deformed rules, and the amount of processing the processing can be reserved. The combination plan can be selected for medium and precise and messy molds. Some cluttered precision molds can be selected in advance, time heat treatment, nitride hydraulic treatment quenching and mold control accuracy.
When repairing the lack of sandy eye, pores, wear, etc., the use of cold -welding machines such as cold welding machines such as small thermal impact technical equipment is to avoid deformation during the repair process. Preparatory and messy molds are preheated to eliminate the remaining stress during the mechanical process. For precision and messy molds, in the case of conditions permit, try to quench and use deep cold treatment through vacuum heating.
Under the premise of ensuring the hardness of my country's molds, try to use pre -cooled, classified cooling quenching or warm quenching technology. Reasonable materials. The mold should be selected for the accurate, messy and good micro -deform carbide bias of the steel material, which should be a reasonable and thermal treatment transfer. Heating temperature.
The large -caliber thick wall spiral tube refers to the spiral steel pipes with a diameter of more than 1000 and more than 10 wall thickness. In terms of compression, stretching and other mechanical properties, it is better than ordinary spiral steel pipes. The project has high demand for the spiral tube. The reason why there will be thick wall spiral steel pipes, because the pressure needs to convey the general spiral steel pipes of certain media, which will be unbearable. Increasing the cost of the project, it is inevitable that if we are dangerous medium. The pipeline of the general fluid conveyor system is welded with a spiral seam arc.
