| 26CrMo4钢的热处理工艺 |
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| 引用本文： | 朱林,程向龙,邹喜洋.26CrMo4钢的热处理工艺[J].金属热处理,2022,47(1):271-275. |
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| 作者姓名： | 朱林 程向龙 邹喜洋 |
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| 作者单位： | 衡阳华菱钢管有限公司, 湖南 衡阳 421001 |
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| 摘 要： | 通过Gleeble-1500热模拟试验机测量了26CrMo4钢的相变温度,然后对其进行910 ℃水淬和400~740 ℃回火处理,并用光学显微镜、拉伸试验、硬度试验和冲击试验研究了热轧态和淬火、回火后的显微组织和力学性能。结果表明:26CrMo4钢具有优良的淬透性,910 ℃水淬可得到原奥氏体晶粒细小均匀的马氏体组织。26CrMo4钢的强度和硬度随着回火温度的提高而降低,回火温度在400~600 ℃、600~640 ℃和640~730 ℃之间时,抗拉强度随回火温度升高而下降的速率分别为1.685、1.500和2.822 MPa/℃。26CrMo4钢的冲击性能随着回火温度的升高而提高,700 ℃回火时0 ℃冲击吸收能量达到227 J,但继续提高回火温度至730 ℃时0 ℃冲击吸收能量基本保持不变。26CrMo4钢640 ℃和700 ℃回火后均具有较好的低温冲击性能,-70 ℃冲击吸收能量仍分别可达81 J和110 J。
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| 关 键 词： | 26CrMo4钢 淬火 回火 组织 拉伸性能 冲击性能 |
| 收稿时间： | 2021-08-29 |
Heat treatment process for 26CrMo4 steel |
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| Zhu Lin,Cheng Xianglong,Zou Xiyang.Heat treatment process for 26CrMo4 steel[J].Heat Treatment of Metals,2022,47(1):271-275. |
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| Authors: | Zhu Lin Cheng Xianglong Zou Xiyang |
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| Affiliation: | Hengyang Valin Steel Tube Co., Ltd., Hengyang Hunan 421001, China |
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| Abstract: | Phase transformation temperature of 26CrMo4 steel was tested by using Gleeble-1500 thermal simulator, and then the steel was water quenched at 910 ℃ and tempered at 400-740 ℃. The microstructure and mechnical properties of the as-rolled as well as the quenched and tempered 26CrMo4 steel were tested by means of OM, tensile test, hardness test and impact test. The results indicate that the 26CrMo4 steel has very good hardenability, and can obtain martensite microstructure with fine and uniform prior austenite grain by water quenching at 910 ℃. The strength and hardness of the steel decrease as the tempering temperature increases, and the decrease rate for the tensile strength are 1.685, 1.500 and 2.822 MPa/℃ respectively when tempered at 400-600 ℃, 600-640 ℃ and 640-730 ℃. The impact property of the steel increases as the tempering temperature increases. The impact absorbed energy at 0 ℃ reaches the maximum value of 227 J when tempering at 700 ℃ and then remains almost unchanged when tempering temperature further increases to 730 ℃. In addition, the 26CrMo4 steel has very good cryogenic impact properties when tempered at 640 ℃ and 700 ℃, where the -70 ℃ impact absorbed energy are 81 J and 110 J, respectively. |
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| Keywords: | 26CrMo4 steel quenching tempering microstructure tensile properties impact properties |
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