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Ti55531钛合金筒形件的旋压成形
写 旭,张立武,杨延涛,曹学文
(西安航天动力机械厂,西安 710025)
摘要:
分析了成形参数对Ti55531钛合金筒形件旋压成形的影响规律。结果表明:采用880℃+保温30min/空冷的热处理可获得较好的强塑性匹配;当旋压温度为750~800℃时,金属流动性好,筒形件表观质量好,且随着旋压道次增加,旋压温度可适当降低,但不应低于650℃,旋压极限减薄率可达80%左右;进给比在0.45~0.78 mm/r取值,在开始道次中采用大点的进给比,使工件较好贴模,在最后道次中采用相对小的进给比便于工件脱模;道次减薄率在30%~45%时较为合适,有利于旋压成形。
关键词:  钛合金,筒形件,旋压成形
DOI:
分类号:TG3
基金项目:
Spinning of Ti55531 Titanium Alloy Cylinder
XIE Xu, ZHANG Liwu, YANG Yantao, CAO Xuewen
(Xi’an Aerospace Power Machinery Factory,Xi’an 710025)
Abstract:
The influence law of forming parameters on the spinning of Ti55531 titanium alloy cylinder was analyed.The results showed that using solid solution heat treatment system(880℃+insulation 30min/air cooling) Ti55531 titanium alloy can achieve better matching between the strength and plasticity.When the spinning temperature is 750 to 800℃,the metal fluidity is good,the apparent quality of spinning cylinder is good.And with the increase of spinning passes,spinning temperature can reduced appropriately,but the final spinning temperature is not lower than 650℃,spinning limit thinning rate achieves about 80%.The selecting of feed ratio is between 0.45 to 0.78 mm/r,the using of large feed ratio in the beginning pass can make the workpiece better fit the mould.The relative small feed ratio make the workpiece strip mould easily in the final pass,the pass thinning rate between 30% to 45% is more appropriate,which benefit spinning.
Key words:  Titanium alloy,Cylinder,Spinning