焊管
銲管
한관
WELDED PIPE AND TUBE
2014年
11期
47-51
,共5页
田小江%罗卓辉%马佼佼%梁航
田小江%囉卓輝%馬佼佼%樑航
전소강%라탁휘%마교교%량항
焊管%N80膨胀管%热处理%显微组织%力学性能
銲管%N80膨脹管%熱處理%顯微組織%力學性能
한관%N80팽창관%열처리%현미조직%역학성능
welded pipe%N80 expandable tube%heat treatment%microstructure%mechanical properties
对N80膨胀管坯在不同淬火、回火温度下通过光学显微镜，扫描电镜和力学性能试验研究了热处理工艺对N80膨胀管坯显微组织及力学性能的影响。结果表明：淬火、回火的温度及其保温时间的选择对材料的组织性能均有较大的影响。通过“淬火温度（略高于材料的Ac3转变点）+回火温度（略低于A1转变点）”热处理工艺可使得钢管在满足基本强度性能要求的同时，均匀延伸率还能稳定保持在9%以上的水平，实现良好的强塑性匹配。
對N80膨脹管坯在不同淬火、迴火溫度下通過光學顯微鏡，掃描電鏡和力學性能試驗研究瞭熱處理工藝對N80膨脹管坯顯微組織及力學性能的影響。結果錶明：淬火、迴火的溫度及其保溫時間的選擇對材料的組織性能均有較大的影響。通過“淬火溫度（略高于材料的Ac3轉變點）+迴火溫度（略低于A1轉變點）”熱處理工藝可使得鋼管在滿足基本彊度性能要求的同時，均勻延伸率還能穩定保持在9%以上的水平，實現良好的彊塑性匹配。
대N80팽창관배재불동쉬화、회화온도하통과광학현미경，소묘전경화역학성능시험연구료열처리공예대N80팽창관배현미조직급역학성능적영향。결과표명：쉬화、회화적온도급기보온시간적선택대재료적조직성능균유교대적영향。통과“쉬화온도（략고우재료적Ac3전변점）+회화온도（략저우A1전변점）”열처리공예가사득강관재만족기본강도성능요구적동시，균균연신솔환능은정보지재9%이상적수평，실현량호적강소성필배。
The influence of heat treatment process on microstructure and mechanical properties of N80 expandable tube billet was studied, through optical microscope, scanning electron microscopy and mechanical properties tests under different quenching and tempering temperature. The results indicated that the temperature of quenching and tempering and the selection of holding time have a great influence on microstructure and properties of the material. By “quenching temperature (slightly above Ac3 transition point)+tempering temperature(slightly lower than A1 transition point)”heat treatment process can make steel pipe meet the basic strength properties requirement, meanwhile, the uniform elongation can keep more than 9%level stably, to achieve a good strong plastic matching.
