铝对复杂黄铜组织及性能的影响

Effect of aluminum on the structure and properties of brass alloy

用光学显微镜(OM)、硬度(HV)和万能试验机对添加不同铝含量(1.5%、2.0%、2.5%、3.0%、3.5%)的复杂黄铜(Cu-22.7Zn-Al-1.0Ni)组织与性能进行了研究.研究结果显示,铝能使合金α相区显著缩小、β相区增加,并起到细化α相、β相的作用,提高合金的抗拉强度、硬度.合金的机械性能随铝含量增加,其抗拉强度和屈服强度提高,而延伸率和冲击韧性下降,当铝含量为3.0%时,0.2 mm Y态板材硬度达到255 HV、抗拉强度达到820 MPa.

This paper studies the microstructure and properties of brass（Cu-22.7Zn-Al-1.0Ni） with different aluminum content（1.5 %, 2.0 %, 2.5 %, 3.0 %, 3.5 %） by using optical microscope, hardness tester and universal materials testing machine. The results show that aluminum alloy can significantly reduce the α-phase region with increased β-phase region. α phase and β phase are refined by improving its tensile strength and hardness. Tensile strength and yield strength of the alloy increase with the addition of Al content. The elongation and impact toughness decrease when the aluminum content reaches 3.0 % and 0.2 mmY state plate hardness reaches 255 HV with tensile strength of 820 MPa.