Die due to wear, erosion, corrosion and thermal fatigue caused deformation, rupture, crack formation, adhesion, burr, flash, peeling, scars and scratches, rough and size deviation in casting, unable to repair before being scrapped, the number of parts processed, said for the service life of the die. For the mold itself, has its normal life level, if a mold, through careful design, pay attention to the maintenance, normal use conditions, after reaching a relative life index at home and abroad compared to the failure, belong to the category of normal life. If the early failure, it shows that the potential of the existing materials and processes can not be fully played, should cause us enough attention, from many aspects to find the reasons, looking for countermeasures. To improve the life of mould is a comprehensive problem with many factors and complexity. With the progress of science and technology, people improve the understanding of the regularity of things, and the life index can also advance to a higher goal.
2 factors affecting the service life of dies
Many factors affect the die life, both external factors are also internal factors, external factors refers to the external environment, die work including: working conditions, equipment conditions, maintenance, maintenance process, workpiece material, thickness, size, shape and so on. Internal cause is: to mold material metallurgical quality, process specification, mechanical processing and heat processing system, including advanced forging and heat treatment and mould structure rationality, process design and the exact matching precision and so on. The durability of the mold will be guaranteed if we do all the aspects mentioned above properly.
The welding material and workpiece in metallurgy and blend. The workpiece surface produces minimal heat in the whole welding process. The traditional welding machine adopts rotating electrode, and the diameter of welding wire varies from 1.6-3.0mm. Suitable for repair of casting defects. Moreover, the traditional electrospark surfacing repair machine can be strengthened by surface coating on the setting of power and discharge frequency. It can repair various metals such as steel, copper and aluminium.
