【摘要】 研究了焊接对冷轧态薄板Fe19Mn5.5Si8.5Cr5Ni(0.1Ti)合金性能和组织的影响。研究发现,合金具有良好的焊接性能,焊后试样具有与母材相近的抗拉强度,添加焊丝和未添加焊丝试样的抗拉强度分别达到母材的97%和94%;同时焊后试样具有较好的延伸率,添加焊丝和未添加焊丝试样延伸率分别达到22.7%和19.8%。经过800℃退火30min处理后试样形状记忆效应最好,母材达到最大值85%,添加焊丝和未添加焊丝试样分别达到77%和80%。组织分析表明,添加焊丝试样溶合区较宽,未添加焊丝试样溶合区较窄,但两种工艺的接头均未发生晶粒异常长大,且未发生较大的元素偏析,因此焊后试样表现为韧性断裂。更多还原

【Abstract】 The effect of welding on the property and structure of Fe19Mn5.5Si8.5Cr5Ni(0.1Ti) shape memory alloy is studied in this paper. The result finds that there is good weldability of the Fe-based shape memory alloy. The tensile-strength of the welded sample with welding wire is 97% of the parent material,while the welded sample without welding wire is 94% of the parent material. Meantime the sample has large extensibility. The extensibility for the sample with welding wire is 22.7%,while the sample without welding wire is 19.8%. The optimum shape memory effect of the sample is got after annealed at 800℃.The base material can reach to 85%,the sample with welding wire can reach to 77%,while the sample without welding wire can reach to 80%. Metallographic and SEM analyses show that there are not abnormal coarse grain in welding joint for both technologies,and the bond region of the sample with welding wire is wider than that of sample without welding wire,so the welded sample shows ductile rupture.更多还原