Forging manufacturers: the use of forgings and its defect analysis?
Forging manufacturers: the mechanical properties of forgings are improved because forging can be used to exert pressure on the metal billet, so that the forging produces a plastic deformation, so it can change its mechanical properties. And also through forging technology to eliminate the looseness of the metal, as well as its holes, so down the mechanical properties of forgings will be greatly improved. So in the use of forgings before, we must first understand the use of forgings and its defect analysis?
Forging manufacturers: then we use the forgings are used in what places, what are its uses? General industrial forgings, we know is in the machine tool manufacturing, agricultural machinery, agricultural tools manufacturing and bearing industry and other civilian industrial appliances. And in forging machinery and equipment, like hammer heads, hammer rods, columns of hydraulic presses, cylinder bodies, pillars and cylinders of wheel presses, etc. Then in military forgings, like gun barrels, door bodies, gun bolt supports and traction rings, etc. Then according to the statistics of materials, in some special uses, forgings account for 65% of their quality. There is also the pressure vessel using forgings, then like the cylinder, kettle ring flange and head and so on inside will use forgings, so it also plays a very important role. The forgings used in hydroelectric generators, for example, like the main shaft and intermediate shaft and so on some uses. As well as its similar marine forgings, such as the crankshaft, tail shaft, rudder shaft, thrust shaft and intermediate shaft, etc.. Of course, in the automotive industry, forgings are also used, such as left and right steering knuckles, front beams, hooks, etc. According to statistics, forgings account for 80% of the mass in automobiles. There are also some forgings used in thermal power stations, these places are, for example, like rotors, impellers, guard ring spindles, etc. Of course modular forgings are also rare, mainly forging dies for hot-die forging hammers. Then in the forgings for locomotives, especially like axles, wheels, leaf springs, crankshafts of locomotives, etc., forgings in locomotives account for 60% of their mass. In addition to these uses above, forgings are used in metallurgical machinery like cold rolls, hot rolls and herringbone gear shafts. This shows that the use of forgings is really very wide, and it plays a very important role in these fields.
Forging manufacturers: but each thing not only has its advantages, there will also be some use of defects, we also want to be positive to treat, as long as a good analysis of these defects, in order to make the use of this thing more smoothly, but also can play a greater role in it, then forging defects, we also come to a good understanding. The first is easier to oxidation, because any metal billet in the heating and oxidizing gas reaction in the furnace to generate oxide phenomenon called oxidation. When the oxide is pressed into the forging depth exceeds the machining margin, it may lead to the forging scrap. There are also problems such as decarburisation, overheating, overburning cracks and so on that need our attention.
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