论文部分内容阅读
热处理现场生产的炉前金相检验,是保证生产工艺和提高产品质量的重要手段。例如汽车、拖拉机、机床等机械装备的齿轮及其许多零件渗碳(或碳氮共渗)均须按规定的标准进行金相检验,否则就达不到既定的性能。如碳化物多(级别高),容易在磨削中产生裂纹,使用中剥落掉块。残余奥氏体多(级别高),零件在使用中容易产生麻点、沟槽、不耐磨损。又如汽车万向节U型螺栓金相组织不符合要求,容易断裂,这要造成翻车事故,车毁人亡。生产中的炉前金相检验,力求快而准,即保证能看准金相组织的
Heat treatment on-site production of metallurgical furnace test is to ensure that the production process and improve product quality an important means. For example, car, tractor, machine tools and other machinery and equipment gear and many parts of carburizing (or carbonitriding) must be metallurgical testing according to the required standards, otherwise it will not reach the established performance. Such as carbide (high level), easy to produce cracks in the grinding, peel off pieces in use. Residual austenite (high level), the parts are prone to pitting in use, grooves, impatience wear. Another example is the universal joint U-bolts metallurgical organization does not meet the requirements, easy to break, which will cause rollover accidents, car crash. Metallurgical furnace production in the test, and strive to fast and accurate, that is guaranteed to be able to spot the microstructure