论文部分内容阅读
运用定向凝固的方法对6101铝合金进行了微观组织重塑,使得合金组织从混乱的枝晶凝固为柱状晶。研究表明,随着凝固速度的增加,合金力学性能得到明显提高,抗拉强度最大达到329 MPa,与铸态相比提高了90%;伸长率最大达到了19%,较铸态时提高了90%;硬度最大为100 HV,与铸态相比下降了9.8%;同时,定向凝固减少了垂直于凝固方向的晶界,提高了合金的导电性能。当凝固速度为10μm/s时,合金的电阻率减小23%。
Using the method of directional solidification, the 6101 aluminum alloy was microstructurally remodeled, which made the alloy structure solidify into columnar crystals from chaotic dendrites. The results show that with the increase of the solidification rate, the mechanical properties of the alloy are obviously improved. The maximum tensile strength reaches 329 MPa, which is 90% higher than the as-cast state. The maximum elongation reaches 19% 90%. The maximum hardness is 100 HV, which is 9.8% lower than the as-cast state. Meanwhile, the directional solidification reduces the grain boundaries perpendicular to the solidification direction and improves the electrical conductivity of the alloy. When the solidification rate is 10μm / s, the resistivity of the alloy decreases by 23%.