【摘要】 本文主要从冶炼、铸造方面研究微量硼添加剂对铸造铜合金金相组织和机械性能的影响。研究表明,微量硼对铜合金有一定的变质效果。变质后,ZHSi80-3合金的金属型、砂型铸造试样的抗拉强度分别提高10%和20%左右;ZQA19-4合金的抗拉强度亦有提高,而延伸率提高显著。ZHSi80-3和ZQA19-4合金中硼的最佳加入量分别在0.02～0.03%和0.015～0.032%之间。更多还原

【Abstract】 The effect of a boron additive in very small amounts on the microstructure and mechanical properties of some copper alloys has been investigated in the present work. It has been shown that the boron additive has a modification effect on the copper alloys. The tensile strangth of a treated ZHSi 80-3 is approximately increased by 10% and 20% for bars cast in metal and sand moulds respectively, The tensile strength of a treated ZQ Al 9-4 is also improved and the elongation is increased considerably. The present work has shown that the optimum amount of the added boron ranges from 0.02 to 0.03% for ZHSi80-3 alloy and from 0.015 to 0.032% for ZQA19-4 alloy.更多还原