生产Fe-Ni膨胀合金的新工艺研究.pdfVIP

维普资讯 铸造技术 VoI．29 NO．4 F0UNDRY TECHN0LoGY Apr．2008 生产Fe．N i膨胀合金的新工艺研究 杨晓华，陈伟庆 (北京科技大学冶金与生态工程学院，北京 100083) 摘要：研究利用化学变质法配合近终形水平连铸生产Fe-Ni膨胀舍金线坯，再将铸态线坯冷拔成丝材的新工艺。实验室研究 及半工业试验结果表明，研究开发的Fe-Ni膨胀合金生产新工艺是可行的；采用新工艺试制的连铸线坯以及拉拔过程的半成 品丝材，其抗拉强度略低于热轧盘圃的强度，而伸长率则高于热轧盘圃的伸长率，因而其冷加工拉拔性能优于热轧盘圃的性 能，并且平均线膨胀系数符合行业标准要求。 关键词：Fe-Ni膨胀合金；新工艺；铸态线坯；冷拉 中圈分类号：TG139 文献标识码：A 文章编号：1000—8365(2008)04—0474—04 Study on the New Technology Of Fe-Ni base Invar Expansion Alloy YANG Xiao-hua，CHEN Wei-qing (School of Metallurgy and EcoJ~ EIlgi e而 ，University of Sdence and Technology Beiiing，B嘶ing 100083，China) Abstract：A new technology of Fe-Ni base invar expansion alloy has been developed，in which fine wires are drawn frOm rod billets produced by mod ification and the near-shape continuous casting． The experimental results and pilot production show that the new technology developed is reasonable to prepare Fe—Ni base invar expansion alloy；The tensile strength of casting bar and semifinished wire produced by the new technology iS slightly lower than that of hot rolled products，but the elongation is much higher．Subsequently，the cold working prope rty of the alloy produced by the new technology iS better than that of hot rolled disks．The average expansion coefficient can mee t the requirements of the industrial specification． Key words：Fe-Ni invar expansion al Ioy；New technology；Casting bar；The cold drawning Fe-Ni膨胀合金主要用于电真空工业作为与玻 通过实验室研究和半工业试验，证明了Fe-Ni膨胀合 璃、陶瓷等封接的结构材料。Fe-Ni膨胀合金传统的 金新型加工工艺的可行性。 生产工艺主要采用非真空冶炼、模铸及热锻、热轧制成 1 实验方法 D8～o10 mm的盘圆，之后再将其拉拔成 D0．2～ 采用Fe-Ni膨胀合金中的4J43作为实验合金，实 D0．8 m