化工換熱器用UNSN08031合金無縫鋼管的研發(fā)

R&D of UNS N08031 Alloy Seamless Pipe for Chemical Heat Exchanger

摘要: 介紹化工換熱器用UNSN08031合金無縫鋼管的研發(fā)過程，采用熱擠壓工藝擠壓UNSN08031荒管，并通過多道次冷軋變形，成功研制出Φ50.8 mm×4 mm規(guī)格UNSN08031合金無縫鋼管。分析結(jié)果表明：UNS N08031合金無縫鋼管的晶粒分布均勻，平均晶粒度6級，具有優(yōu)良的力學性能和加工性能，其化學成分、金相組織及力學性能均滿足ASME SB 622—2019規(guī)范要求。

Abstract: Elaborated here in the paper are the R & D activities for the UNSN08031 alloy seamless pipe as used for the chemical heat exchanger.TheΦ50.8 mm×4 mm UNSN08031 alloy seamless pipe is successfully developed by means of employment of the hot-extrusion process to produce the blank pipe that is sequentially cold rolled/deformed via multiple passes.The analysis result proves that the said alloy pipe as developed features homogeneous grain distribution,Level 6 average grain size,excellent mechanical properties,and workability.Furthermore the alloy pipe also has its all technical indexes concerning chemical composition,metallographic structure and mechanical properties conforming to relevant requirements as specified under ASMESB 622—2019.