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我院与唐山水泥机械厂密切协作修复的DKZ6300立车的横梁、拖板、立柱、滑枕等零件,经过分析证明都属于HT20-40灰口铸铁。这种珠光体灰口铸铁有良好的强度、耐磨性能和消震性能。用它制造的机床导轨表面的条状石墨容易脱落,而脱落的石墨本身就是良好的减磨剂;同时,由于石墨脱落而留下的孔洞则有利于润滑油的贮存。对减小摩擦副的磨损也极为有利。但是,导轨材料
Our hospital and Tangshan Cement Machinery Plant close collaboration repair DKZ6300 vertical car beams, carriage, column, ram and other parts, after analysis have shown that belong to HT20-40 gray cast iron. This pearlite gray cast iron has good strength, wear resistance and shock absorption properties. The strip-shaped graphite on the surface of the guide rail made by the machine is easy to fall off, and the detached graphite itself is a good anti-wear agent. Meanwhile, the holes left by the graphite are favorable for the storage of lubricating oil. It is also extremely advantageous to reduce the wear of the friction pair. However, the guide rail material