30Mn2鋼HFW焊管焊縫淬火后在線熱處理工藝的選擇

Determination of On-line Heat Treatment Process for Quenched Seam of 30Mn2 HFW Pipe

摘要: 介紹了30Mn2鋼HFW焊管焊縫在線熱處理的重要性。通過采用5套熱處理方案進(jìn)行試驗(yàn)并對(duì)試驗(yàn)結(jié)果進(jìn)行分析后認(rèn)為,30Mn2鋼HFW焊管焊縫淬火后熱處理的工藝以高溫回火+正火最為合適,回火溫度設(shè)在600℃左右,正火溫度設(shè)在940~960℃。采用此工藝,為30Mn2鋼HFW焊管整體調(diào)質(zhì)奠定了堅(jiān)實(shí)的基礎(chǔ),排除了焊管整體淬火時(shí)焊縫力學(xué)性能不穩(wěn)定的隱患。

Abstract: Briefed in the article is the importance of the on-line heat treatment of the seam of the 30Mn2 HFW pipe. Following five different heat treatment process solutions,relevant tests are conducted,and the results analyzed,which leads to such a conclusion that for the heat treatment of the quenched seam of the 30Mn2 HFW pipe,the hi-temperature tempering + normalization process is the most appropriate one. In this case,the tempering temperature should be about 600℃,and the normalization temperature range should be 940~960℃. This heat treatment process contributes to a solid basis for over-the-length quenching-and-tempering treatment of the 30Mn2 HFW pipe,and thus eliminating the potential problem that mechanical property inconsistency of the seam might be caused,when the pipe is undergoing over-the-length quenching treatment.