Which is better, casting, forging or welding?
Each has its own characteristics, high casting hardness, small deformation, high forging strength, plasticity, welding, welding easily crack
Although the three hundred and sixty-five lines of the line, the number one, but relatively speaking, from the point of view of graduation, or welding the best
Look at your structure, but as far as China is concerned, China's casting is not very good, there are too many defects, poor quality control, easy to report waste.
Depends on the use of things. Metal can improve its microstructure and mechanical properties after forging. After casting forging method of hot deformation due to metal deformation and recrystallization, the coarse dendrite and columnar grains turned into finer grain size, uniform equiaxed grain, so that the original ingot segregation, porosity, porosity, slag compaction and welding, the organization becomes more closely, improve the plasticity and mechanical properties of metals. The mechanical properties of the casting are lower than those of the same material. In addition, forging processing can ensure the continuity of the metal fibrous tissue, fibrous tissue to forging and forging shape consistency, metal streamline integrity, can ensure the parts with good mechanical properties and long service life by precision forging, cold extrusion, forging temperature and extrusion process production, casting is incomparable
