CAJ | 학술논문

为了提高 Al-1.1Mg-0.3Cu 合金线杆的拉伸性能，通过金相、透射电镜、扫描电镜显微组织观察和拉伸试验分别对连续挤压态及拉拔退火态合金的微观组织和拉伸性能进行了研究.结果表明：连续挤压成形工艺有助于进一步改善合金的拉伸性能，与传统拉拔后退火处理工艺相比，通过连续挤压工艺制备的合金组织晶粒细小而均匀，沉淀相和位错密度较少，致使合金的延伸率相对较高而加工硬化率相对较低；此外，相比传统工艺，由连续挤压工艺制备的合金拉伸试样断口形貌中韧窝更深、更细小.
위료제고 Al-1.1Mg-0.3Cu 합금선간적랍신성능，통과금상、투사전경、소묘전경현미조직관찰화랍신시험분별대련속제압태급랍발퇴화태합금적미관조직화랍신성능진행료연구.결과표명：련속제압성형공예유조우진일보개선합금적랍신성능，여전통랍발후퇴화처리공예상비，통과련속제압공예제비적합금조직정립세소이균균，침정상화위착밀도교소，치사합금적연신솔상대교고이가공경화솔상대교저；차외，상비전통공예，유련속제압공예제비적합금랍신시양단구형모중인와경심、경세소.
In order to improve the drawability of Al-1.1Mg-0.3Cu alloy wire rod,the microstructures and mechanical properties of continuous extruded and conventional drawn and annealed alloys were investi-gated by observation of optical microscopy,transmission electron microscopy and scanning electron micros-copy and tensile testing.The experimental results show that continuous extrusion forming produced a fi-ner,more uniform structure,with fewer precipitates and lower dislocation density,than that resulting from conventional drawing followed by annealing processing.Increased tensile elongation,lowered work hardening rate,and enhanced drawability resulted from continuous extrusion processing.The fracture sur-face of the material prepared by continuous extrusion presented deeper and finer dimples,compared with that of the conventionally processed material.