论文部分内容阅读
在无镍白铜(CuMnZn)中分别添加微量稀土Ce(0.04%,0.06%,0.08%),研究稀土Ce含量及加工工艺参数对铸态、热轧态和冷轧态组织及性能的影响。探索用无镍白铜(CuMnZn)替代目前广泛使用的弹性合金材料——锌白铜的可行性。研究结果显示:当稀土含量小于0.04%时,随合金中稀土Ce含量的增加,铸态合金的α晶粒尺寸减少,细化晶粒,提高合金的抗拉强度、伸长率,且合金具有较好的冷加工性能。当稀土Ce含量超过0.04%后,合金的晶粒又有长大的趋势。材料的性能在0.04%左右达到峰值,随着稀土Ce含量的增加,其性能呈下降趋势。对含0.04%稀土Ce的无镍白铜(CuMnZn)合金,采用合理加工工艺和热处理制度加工而成的0.3 mm厚的带材的洛氏硬度、抗拉强度及伸长率分别为85HRB,567.4 MPa及5%,与Y状态BZn15-20材料的性能相当,满足弹性材料的使用要求。且无镍白铜(CuMnZn)合金中的元素都是国内富有元素,可有效降低成本,具有实用价值。
Trace amounts of rare earth Ce (0.04%, 0.06%, 0.08%) were added to CuMnZn to study the effects of rare earth Ce content and processing parameters on microstructure and properties of as-cast, hot-rolled and cold-rolled alloys. Explore the feasibility of using nickel-free white copper (CuMnZn) to replace the currently widely used elastic alloy material - zinc white copper. The results show that when the content of rare earth is less than 0.04%, the α grain size of the as-cast alloy decreases with the increase of the content of rare earth Ce in the alloy, the grains are refined, the tensile strength and elongation of the alloy are increased, and the alloy has Better cold workability. When the content of rare earth Ce exceeds 0.04%, the alloy grains grow up again. The performance of the material peaked at around 0.04%. With the increase of Ce content, the properties of the material showed a decreasing trend. For 0.3% Cu-free Cu-Zn-Cu alloy containing 0.04% rare-earth Ce, Rockwell hardness, tensile strength and elongation of the 0.3 mm-thick strip were 85 HRB and 567.4 MPa And 5% respectively, which is equivalent to the performance of BZn15-20 material in Y state and meets the requirements for the use of elastic materials. And no nickel white copper (CuMnZn) alloy elements are all rich elements, can effectively reduce costs, with practical value.