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| 1 | 热处理工艺对CL50D车轮钢晶粒度的影响显示文摘研究了加热速率、加热温度、保温时间及冷却速率等热处理工艺参数对高速车轮钢CL50D热处理态的晶粒度和断裂韧性的影响。结果表明,对轧态车轮钢采用快速加热(10~25℃/min)至约850℃,保温30~60 min后,经1~2℃/s控制冷却至室温可得到细化且均匀的珠光体+网状铁素体组织,断裂韧性优异Kq可达90 MPa.m1/2以上。 | 任学冲 李胜军 高克玮 宿彦京 江波 陈刚 赵海 | 2012 | 金属热处理2012，37，7： | 8 |
| 2 | 深冷时效循环处理铝基原位复合材料的显微组织和力学性能显示文摘采用熔体直接反应法,以工业7055铝合金为基体,利用K2TiF6和K2ZrF6多组元制备Al3(Ti0.5Zr0.5)原位颗粒强化铝基复合材料,再将复合材料经过挤压、固溶时效处理后进行深冷时效循环处理。采用正交实验设计法研究降温速度、处理时间和循环次数对复合材料显微组织和力学性能的影响。采用差示热分析仪对复合材料进行低温热分析,采用SEM和TEM对材料显微组织进行观察。结果表明:材料从液氮温度77 K升温至165 K左右时出现了明显的放热峰,此温度处出现了相变。热计算结果表明该温度下大量析出了S相(Al2CuMg)。深冷处理后复合材料内部细小析出相数量增多,主要组分是η(MgZn2)相和η′(MgZn2′)相;随着降温速度、处理时间和循环次数增加,性质不稳定且硬度高的η′相数量减少,性质稳定硬度较低的η相数量增加。与未冷处理试样相比,深冷时效循环处理后试样的平均抗拉强度提高14.7%,冲击韧性提高10.9%,伸长率提高50%,断裂机制为韧窝型断裂机制。当试样具有高强度、高韧性时,对应的最优冷处理参数为:降温速度v为1℃/min、保温时间t为24 h、循环次数N为1或2。当试样的伸长率最高时,对应的参数为:v为10℃/min、t为36 h、N为1。复合材料强化机制为析出相强化、位错强化和细晶强化等。 | 李桂荣 崔玉华 王宏明 赵玉涛 | 2015 | 中国有色金属学报2015，25，5： | 6 |
| 3 | Effect of Multi-Step Tempering on Retained Austenite and Mechanical Properties of Low Alloy Steel显示文摘The effect of multi-step tempering on retained austenite content and mechanical properties of low alloy steel used in the forged cold back-up roll was investigated.Microstructural evolutions were characterized by optical microscope,X-ray diffraction,scanning electron microscope and Feritscope,while the mechanical properties were determined by hardness and tensile tests.The results revealed that the content of retained austenite decreased by about 2% after multi-step tempering.However,the content of retained austenite increased from 3.6% to 5.1% by increasing multi-step tempering temperature.The hardness and tensile strength increased as the austenitization temperature changed from 800 to 920 ℃,while above 920 ℃,hardness and tensile strength decreased.In addition,the maximum values of hardness,ultimate and yield strength were obtained via triple tempering at 520 ℃,while beyond 520 ℃,the hardness,ultimate and yield strength decreased sharply. | Hamid Reza Bakhsheshi-Rad Ahmad Monshi Hossain Monajatizadeh Mohd Hasbullah Idris Mohammed Rafiq Abdul Kadir Hassan Jafari | 2011 | Journal of Iron and Steel Research(International)2011，18，12： | 2 |
| 4 | Effect of deep cryogenic treatment on the properties of 80CrMo12 5 tool steel显示文摘The effect of deep cryogenic treatment on the mechanical properties of 80CrMo12 5 tool steel was investigated. Moreover, the effects of stabilization (holding at room temperature for some periods before deep cryogenic treatment) and tempering before deep cryogenic treatment were studied. The results show that deep cryogenic treatment can eliminate the retained austenite, making a better carbide distribution and a higher carbide amount. As a result, a remarkable improvement in wear resistance of cryogenically treated specimens is observed. Moreover, the ultimate tensile strength increases, and the toughness of the sample decreases. It is also found that both stabilization and tempering before deep cryogenic treatment decrease the wear resistance, hardness, and carbides homogeneity compared to the deep cryogenically treated samples. It is concluded that deep cryogenic treatment should be performed without any delay on samples after quenching to reach the highest wear resistance and hardness. | Kamran Amini Said Nategh Ali Shafyei Ahmad Rezaeian | 2012 | International Journal of Minerals,Metallurgy and Materials2012，19，1： | 2 |
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