热型连铸CuAlNi形状记忆合金线材的组织与力学性能
Microstructure and Mechanical Property of CuAlNi Shape Memory Alloy Wires Produced by Heated Mould Continuous Casting
李 炳, 王 鑫, 陈 建, 范新会
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作者单位：(西安工业大学 材料与化工学院, 陕西 西安 710032)
中文关键字：热型连铸； CuA1Ni合金； 形状记忆
英文关键字：heated mould continuous casting; CuA1Ni alloy; shape memory
中文摘要：在自制的热型连铸设备上，制备出了直径为2.6 mm的CuAlNi形状记忆合金线材。并对线材的组织和力学性能进行了研究。结果表明：连铸速度对CuAlNi合金线材的组织和性能有决定性影响。当铸型温度为1100～1150 ℃、连铸速度为75 mm/min、冷却距离为15 mm、冷却水量为60 L/h时，可制备出表面质量良好的CuAlNi形状记忆合金线材。热型连铸技术制备的CuAlNi形状记忆合金线材的抗拉强度为288 MPa，断后伸长率为9.43%。
英文摘要：CuAlNi shape memory alloy wires with 2.6 mm in diameter was produced by heated mould continuous casting using self-designed and manufactured equipment. The microstructure and mechanical properties of these wires were studied. The results show that the continuous casting speed has a decisive influence on the microstructure and mechanical properties of CuAlNi alloy wires. CuAlNi shape memory alloy wires with good surface quality can be prepared when the temperature is 1100 ℃～1150 ℃; casting speed is 75 mm/min; cooling distance is 15 mm and the cooling water is 60 L/h. The CuAlNi shape memory alloy wires produced by heated mould continuous casting show a tensile strength of 288 MPa and elongation of 9.43%.