Ti-1300F钛合金熔炼工艺研究

Study on melting process of Ti-1300F titanium alloy

Ti-1300F钛合金是新疆湘润新材料有限公司成功研发的一种新型Ti-Al-Mo-V-Cr-Fe系亚稳态β型高强高韧钛合金。为解决Ti-1300F钛合金工业化生产中可能存在的电极致密度弱、电极强度低、元素偏析等问题,在分析其钛合金成分元素后,对其进行试验生产。通过选用合适的中间合金,调整混料时间、压制压力、焊接强度等参数,制备了一支Ф400 mmTi-1300F钛合金自耗电极。自耗电极经过三次VAR熔炼,调整熔炼参数,生产出Ф650mm成品钛合金铸锭。利用化学分析方法对铸锭横向和纵向所取的数十个试样进行了成分分析。试验结果表明,此试验方法下生产的自耗电极致密度和强度满足熔炼要求,熔炼过程无掉块和断裂情况发生,熔炼后铸锭主元素Al、V、Mo、Cr、Fe的成分纵向和横向均匀性控制良好,且均满足Ti-1300F钛合金成分设计要求。

Ti-1300F titanium alloy is a new type of Ti-Al-Mo-V-Cr-Fe metastableβ-type high strength and high toughness titanium alloy successfully developed by Xinjiang Xiangrun new materials Co.,Ltd.In order to solve the problems of weak electrode density,low electrode strength and element segregation that may exist in the industrial production of ti-1300f titanium alloy,the test production was carried out after analyzing the elements in the titanium alloy.By selecting suitable master alloy,adjusting mixing time,pressing pressure,welding strength and other parameters,aΦ400mm Ti-1300F titanium alloy consumable electrode was prepared.After three times of VAR smelting and adjusting the smelting parameters,the finished titanium alloy ingot with a diameter ofΦ650mm was produced.Chemical analysis method was used to analyze the composition of dozens of samples taken from transverse and longitudinal direction of ingot.The test results show that the density and strength of consumable electrode produced by this test method can meet the requirements of melting,and there is no falling block and fracture during the melting process.After melting,the longitudinal and transverse homogeneity of the main elements Al,V,Mo,Cr and Fe in the ingot is well controlled,and all meet the requirements of Ti-1300F titanium alloy composition design.