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26CrMoNbTiB(S135)钻杆管热处理工艺的研究 总被引:1,自引:0,他引:1
在不同的热处理条件下,测定了26CrMoNbTiB钻杆管的性能和组织.研究结果表明,回火温度的提高,回火保温时间延长,强度指标下降,塑性和韧性指标上升;而淬火温度对该钢种的力学性能则没有明显的影响.最佳热处理制度为:淬火温度900℃,保温30 min,回火温度590℃,保温60min.经此热处理工艺处理后,能满足API5D标准各项要求,并达到S135钢级的中上限水平. 相似文献
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研究了热处理工艺对钢管连轧机架耐磨复合衬板工作层材料力学性能的影响。结果表明 ,淬火温度低于 90 0℃时 ,硬度随淬火温度升高而升高 ,高于 90 0℃时 ,硬度反而下降。淬火温度低于 92 0℃时 ,温度对冲击韧性影响不明显 ,淬火温度高于 92 0℃时 ,冲击韧性略有下降。回火温度高于 45 0℃时 ,硬度明显降低。随着回火温度升高 ,冲击韧性和断裂韧性提高。回火温度高于 40 0℃时 ,延伸率和断面收缩率大幅度提高。3 5 0℃回火后耐磨性达到最大值。耐磨复合衬板工作层材料的最优热处理工艺为 :90 0~ 92 0℃淬火 +3 5 0~ 3 70℃回火。 相似文献
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就工程机械用履带钢23MnB的热处理工艺进行了研究.讨论了淬火温度对23MnB钢性能及组织的影响,以及回火温度对钢机械性能的影响,确定出了23MnB钢合适的热处理工艺制度. 相似文献
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本试验研究了不同淬火和回火工艺热处理对Cr12MoV钢组织、硬度和磨损性能的影响。实验结果表明:当在1050~1100℃范围内淬火、520℃回火时,得隐针马氏体+少量残余奥氏体组织,材料硬度与耐磨性均较好;当在1100℃淬火,各温度二次回火硬度均较一次回火高,当在550℃回火时,试验钢实现二次硬化,且残余奥氏体大量转变,硬度和耐磨性达最大值,材料性能最优。 相似文献
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Y O'Connor 《Canadian Metallurgical Quarterly》1993,106(1265):198-201
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CW Cole 《Canadian Metallurgical Quarterly》1997,349(9064):1490-1491
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The recently published 1994 National Earthquake Hazards Reduction Program (NEHRP) provisions include new and substantially improved provisions for the seismic design of nonstructural components, including architectural, mechanical, and electrical components. The provisions are a significant departure from the 1991 NEHRP provisions and other seismic provisions, such as those offered by the 1994 Uniform Building Code (UBC). The design-force provisions are rationally derived and consider actual in-structure acceleration data recorded in recent significant California earthquakes. Also considered in the design-force equations are the dynamic properties of the components, the location of the component within the supporting structure, the safety and operational importance of the component, and the component's anchorage ductility and energy-absorption capability. The resulting force requirements of the new recommendations are compared with the 1991 NEHRP provisions and the 1994 UBC requirements. In addition, explicit design displacement provisions are introduced and discussed. 相似文献
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Benjamin P. Thompson Stuart D. Anderson Jeffrey S. Russell Awad S. Hanna 《Canadian Metallurgical Quarterly》2002,18(3):129-137
This paper presents guidelines for implementing the construction warranty contracting method in the highway construction industry. A logical, step-by-step method for effectively applying the warranty contracting program for use in the highway construction industry is developed. Relevant issues that may present obstacles to the implementation are addressed, while the best practices, compiled from an evaluation of the current industry’s state-of-the-art practices, will assist an interested state highway agency in creating a warranty specification. In performing this research, the current use of warranty specifications among state highway agencies was examined, and an in-depth case study of the Wisconsin Department of Transportation’s warranty program was conducted. 相似文献