利用火焰枪对超弹性形状记忆合金进行局部热处理的初步研究  

A Pilot Study on the Local Heat Treatment of Superelastic Shape Memory Alloy Using a Fire Gun

作　　者：罗洪艳[1] 高翾[1] 党富科 廖彦剑[1] 陈义安[1] 

机构地区：[1]重庆大学生物工程学院、生物流变科学与技术教育部重点实验室,重庆400030 [2]重庆医用设备厂,重庆400064

出　　处：《材料导报》2013年第2期1-5,共5页Materials Reports

基　　金：国家自然科学基金(30900323);重庆市科技攻关重点项目(CSTC,2009AB5219);重庆大学大型仪器设备开放基金(2011121522)

摘　　要：构建了基于火焰枪的局部热处理系统,对消除超弹性镍钛形状记忆合金(SMA)弹簧端部目标部位的超弹性开展了初步实验研究,并结合温度与硬度测试,探讨了热处理温度、保温时间、加热方式对超弹性消除效果、处理部位颜色的影响。结果表明,该系统可在770℃以上、极短的保温时间内有效消除镍钛SMA弹簧目标部位的超弹性而主体几乎不受影响。热处理温度是目标部位超弹性能否消除的决定性因素,而保温时间的影响不大。灼烧方式比热传导方式更易引起目标部位的颜色变化。A local heat treatment system was constructed based on a flame gun and the preliminary experimental study on the elimination of superelasticity of the target site at one end of the nickel-titanium shape memory alloy （SMA） springs was carried out. The temperature and hardness of the samples were detected and correlated to explore the influence of heat treatment temperature, holding time and heating method on eliminating the superelasticity and the color change of the samples. The results show that the developed system can effectively eliminate the superelasticity of the target site and meanwhile keep the main body of the samples unaffected, on condition that the heat treatment temperature reaches above 770 ℃, whereas the holding time can be very short. The heat treatment temperature is the decisive factor in eliminating the superelasticity of the target site, while the holding time has little effect. Burning heating is more likely to cause a color change at the target site of the samples than the thermal conductive heating.

关 键 词：形状记忆合金 超弹性 局部热处理 火焰枪 硬度 

分 类 号：TG139.6[一般工业技术—材料科学与工程]