热加工工艺
熱加工工藝
열가공공예
HOT WORKING TECHNOLOGY
2009年
24期
17-19
,共3页
形状记忆合金%马氏体转变%形变%热膨胀
形狀記憶閤金%馬氏體轉變%形變%熱膨脹
형상기억합금%마씨체전변%형변%열팽창
shape memory alloys%martensitic transformation%deformation%dilatometry
通过Fe16Mn6Si7Cr7Ni合金变形量的大小和形变的类型来研究马氏体的转变特征.形变类型及变形量为:冷轧13%～28%;拉伸4%～17%.并通过热膨胀法测量合金相转变起始温度和转变终了温度,合金的相组成和微观结构特征通过XRD、SEM获得.研究结果表明:冷变形过程均会导致合金的形状恢复率降低,导致应力诱发ε、α/马氏体的形成,并使热马氏体的帆低于室温.
通過Fe16Mn6Si7Cr7Ni閤金變形量的大小和形變的類型來研究馬氏體的轉變特徵.形變類型及變形量為:冷軋13%～28%;拉伸4%～17%.併通過熱膨脹法測量閤金相轉變起始溫度和轉變終瞭溫度,閤金的相組成和微觀結構特徵通過XRD、SEM穫得.研究結果錶明:冷變形過程均會導緻閤金的形狀恢複率降低,導緻應力誘髮ε、α/馬氏體的形成,併使熱馬氏體的帆低于室溫.
통과Fe16Mn6Si7Cr7Ni합금변형량적대소화형변적류형래연구마씨체적전변특정.형변류형급변형량위:랭알13%～28%;랍신4%～17%.병통과열팽창법측량합금상전변기시온도화전변종료온도,합금적상조성화미관결구특정통과XRD、SEM획득.연구결과표명:랭변형과정균회도치합금적형상회복솔강저,도치응력유발ε、α/마씨체적형성,병사열마씨체적범저우실온.
The characteristics of martensitic transformation in Fe16Mn6Si7Cr7Ni alloy were investigated by the amount and type of deformation: 13% to 28% cold rolling, and 4% to 17% elongation. The starting and finishing transformation temperature of the alloys was measured by dilatometry method. The constitution and microstrueture of the alloys were characterized by X-ray diffraction, scanning electron microscopy. The results show that cold forming processes decrease the shape recovery ratio and induce the formation of ε and α/ martensitic, and make the starting transformation temperature of thermal martensitic below room temperature.
