X90高强管线钢的应变时效行为和敏感温度
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杨军, 毕宗岳, 南黄河, 刘海璋
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Investigation of Strain Aging Behavior and Sensitive Temperature of X90 High Strength Pipeline Steel
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YANG Jun, BI Zongyue, NAN Huanghe, LIU Haizhang
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表2 应变时效前后X90管线钢的拉伸性能
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Table 2 Tensile properties of X90 pipeline steel before and after strain aging
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| Aging treatment process | Yield strength Rp0.2/MPa | Tensile strength Rm/MPa | Yield ratio Rp0.2/Rm | Uniform elongation UEL/% | Fracture strain εf / % |
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| Before aging | 627 | 737 | 0.85 | 7.3 | 20.0 | | 373.15 K+5 min | 605 | 744 | 0.81 | 7.1 | 19.6 | | 423.15 K+5 min | 661 | 741 | 0.89 | 6.9 | 19.7 | | 473.15 K+5 min | 676 | 745 | 0.91 | 7.1 | 19.2 | | 483.15 K+5 min | 693 | 721 | 0.96 | 7.3 | 20.3 | | 493.15 K+5 min | 685 | 730 | 0.94 | 7.5 | 20.2 | | 503.15 K+5 min | 686 | 754 | 0.91 | 6.6 | 18.4 | | 513.15 K+5 min | 705 | 742 | 0.95 | 7.5 | 19.8 | | 523.15 K+5 min | 685 | 754 | 0.91 | 7.1 | 19.3 |
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