共查询到18条相似文献,搜索用时 203 毫秒
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通过对1Cr17Ni2不锈钢相区变化的分析,从理论上阐述了1Cr17Ni2钢的热处理的机理,并通过实例给出了能够同时使1Cr17Ni2钢获和高韧性的热处理方法。 相似文献
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1Cr 17Ni2不锈钢属于火电大机组零部件所采用的材料之一,因其组织中易产生铁素体而使钢的热加工工艺性能和热处理工艺性能下降。采用Thermo Calc软件对不同条件下1Cr 17Ni2不锈钢的平衡组织进行了定量计算,分析了温度和化学成分两因素对钢的平衡组织的影响规律,在此基础上提出了1Cr 17Ni2 不锈钢化学成分的控制范围和热加工及热处理的温度规范。结果表明,Thermo Calc预测结果与现有试验数据基本上吻合,可以用于指导1Cr 17Ni2 不锈钢的生产和使用。表1参9 相似文献
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通过试验研究摸索了1Cr12Ni2WMoVNbN材料的机械性能和微观金相组织特性,确定了最佳热处理工艺。 相似文献
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通过试验研究摸索了1Cr12Ni2WMoVNbN材料的机械性能和微观金相组织特性,确定了最佳热处理工艺. 相似文献
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2.3 成分复杂的Cr-Ni型奥氏体钢简单成分的Cr-Ni型奥氏体钢在600~650℃下持久强度不太高,各国均对此类钢种进行了改进,以便把使用温度提高到650~700℃。为此,原苏联70年代在上述钢的基础上添加W、Mo、Nb、V、Ti及B等合金元素,开发了12Cr14Ni18W2NbB(695)、10Cr16Ni16W2NbMoB(184)及12Cr16Ni14W2NbMnB(17)。这些钢的特点是,在680~700℃下金相 相似文献
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化学成分对1Cr 17Ni2钢金相组织和力学性能的影响 总被引:1,自引:1,他引:0
引进型的电站泵平衡鼓等零件采用1Cr17Ni2钢制造。国产的1Cr17Ni2钢的含镍量低,导致金相组织有大量的铁素体,从而影响力学性能,通过调整热处理工艺使材料达到了设计规定的技术要求。表7参2 相似文献
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L. Z. Zhang B. L. Bates 《Energy Materials: Materials Science and Engineering for Energy Systems》2016,11(2):136-141
An electrolytic process was utilised to fabricate NiCoCrAlY coatings, involving deposition of a composite coating consisting of the (Ni,Co) matrix and CrAlY particles, followed by a diffusion heat treatment to convert the composite coating to the desired NiCoCrAlY microstructure. This study focused on the effects of the post-deposition heat-treating conditions (temperature and atmosphere) on the final coating microstructure and composition. The (Ni,Co)–CrAlY composite coatings were heat-treated for 2?h at 1000, 1100 and 1200°C in vacuum and Ar, respectively. Phase constituents and concentrations of the major elements in the coating after heat treatment were examined. Vacuum heat treatment at temperatures ≥1100°C resulted in a significant decrease in Cr content at the coating surface due to Cr evaporation. Heat treatment at 1200°C also caused outward diffusion of Ti from the substrate alloy to the coating layer. 相似文献
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船用柴油机气门的强化特性探讨 总被引:1,自引:0,他引:1
本文简述了船用柴油机气门的强化要求与现状;探讨了奥氏作热强钢2Cr21Ni12N气门的强化特性与热处理工艺;分析了常温与高温条件下的强度、塑性、韧性的关系,以及高温疲劳强度与常温冲击韧性、微观金相组织之间的关系;探讨了冲击韧性指标的工程应用意义. 相似文献
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AbstractInitial results are reported from a study aimed to investigate the role and influence of the elements Cr, Ni, Mn and Si on the radiation stability of reactor pressure vessel steels. Twelve as cast model ferritic steels with basic composition typical of those used in Russian WWER-1000 and Western PWR reactor pressure vessel materials were subjected to Charpy impact, magnetic Barkhausen noise (MBN), Vickers hardness tests and SEM examination. Higher Cr content in model steels was found generally to give increased RMS values independent of Mn and Si contents. The ductile–brittle transition temperatures (DBTT) and hardness values of the model steels were found to be independent of composition. Two steels, with low concentration of Ni and high concentration of Cr or vice versa , showed high transition temperatures (?16 and ?42°C respectively). An additional heat treatment to improve the properties is being considered for these compositions. The correlation between DBTT and MBN results has potential for rapid determination of the effect of composition and irradiation on the steel properties. The next stage of the assessment will investigate the effect of irradiation of the model steels to accumulated neutron fluences of ~1019 cm?2. 相似文献
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将金属有机骨架MIL-101(Cr)-NH2与CaCl2通过浸渍的方法复合得到MIL-101(Cr)-NH2/CaCl2热化学蓄热复合材料。采用X射线衍射分析仪(XRD)、扫描电子显微镜(SEM)、能谱分析(EDS)、全自动比表面积及孔径分析仪以及同步热分析仪(TG-DSC)等分析了复合材料的表观形貌、盐含量、比表面积和蓄热密度等参数。结果显示,复合材料的盐含量为49%,在30℃、32%湿度下的最大吸水量为0.54 g(H2O)/g(样品),蓄热密度达到了1 204 kJ/kg,并且在经历了17次吸附-解吸循环后,其蓄热密度仅降低了6.5%,表现出优异的循环稳定性,出色的吸附性能表明这一新型复合材料在太阳能蓄热领域具有广阔的应用前景。 相似文献
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Uttam K. Chanda Ajay Behera Sudesna Roy Soobhankar Pati 《International Journal of Hydrogen Energy》2018,43(52):23430-23440
Polymer electrolyte membrane fuel cell (PEMFC) stacks suffer from the high cost and low volumetric energy of non-porous graphite bipolar plates. To resolve this problem, a bilayer coating consisting of Ni and Ni–Cr–P is deposited on AISI 1020 low-carbon steel using pulse electrodeposition. Ni/Ni–Cr–P-coated AISI 1020 is evaluated as a bipolar plate material for PEMFCs. Ni/Ni–Cr–P-coated substrates exhibit better corrosion resistance in both cathodic (air-purging) and anodic (H2-purging) environment than the bare AISI 1020 substrate and lower interfacial contact resistance (ICR) than bare AISI 1020 and stainless steel. Further, it is expected to show better water management as the Ni/Ni–Cr–P coating is more hydrophobic than the bare substrate. Preliminary studies show that Ni/Ni–Cr–P-coated AISI 1020 plate can be a suitable candidate for replacing graphite as the bipolar plate of PEMFCs. 相似文献