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铸造25%铅和30%铅的铅青铜是用于高温高压的轴承材料.由于铜和铅的熔点相差极大,固溶度又极小,铸造时容易产生“逆偏
Lead casting of 25% lead and 30% lead is used for high temperature and pressure bearing materials.Because of the great difference between the melting point of copper and lead, solid solubility is extremely small, casting prone to "reverse