真空氧氩脱碳转炉冶炼的单点液滑环用双相不锈钢锻造工艺研究

Study on Forging Technology of Duplex Stainless Steel for Single Point Liquid Slip Ring in Vacuum Oxygen Argon Decarbonization Converter

基于单点液滑环用2205双相钢锻件服役性能要求,设计了针对单点液滑环用双相钢中大型锻件的锻造工艺。采用真空氧氩脱碳炉(VODC)精炼技术,确保钢锭的纯净度。制定了合理的单点液滑环用中大型锻件固溶热处理工艺曲线,现场通过精细调控加热保温参数和冷却速度等,成功制备出组织稳定且成分均匀的α+γ双相不锈钢锻件,有效避免了富Cr脆性σ相的析出。经综合性能测试验证,该锻件力学性能和耐蚀性能等指标均满足单点液滑环现场使用的技术要求。

Based on the service performance requirements of 2205 dual phase steel forgings for single-point liquid slip ring,the forging process of medium and large forgings for single-point liquid slip ring was designed.The refining technology of vacuum oxygen argon decarburization furnace(VODC)was used to ensure the purity of the ingot.The reasonable solution heat treatment process of medium and large forgings for single-point liquid slip ring was established.By finely regulating the parameters of heating and holding and cooling rate,theα+γduplex stainless steel forgings with stable structure and uniform composition were successfully prepared,which effectively avoided the precipitation of Cr-richσbrittle phase.The comprehensive performance test shows that the mechanical properties and corrosion resistance of the forging meet the technical requirements of the single-point liquid slip ring.