哈氏合金SB-333材料的机械加工

从哈氏合金SB-333材料的化学成分、机械性能入手,分析了哈氏合金SB-333材料的机械加工性能,并从刀具的选材、刀具角度的确定、切削用量的选择等方面介绍了哈氏合金SB-333材料的机械加工方法。     

哈氏合金(Hastelloy-C-276)管道的TIG焊接

通过对哈氏合金(Hastelloy-C-276)进行化学成分、焊接性能分析及焊接工艺评定,制定了正确的焊接施工工艺,保证了哈氏合金(C-276)管道的焊接质量,可作为制定类似材料焊接工艺的参考。     

哈氏合金B-3材料换热器的设计制造

介绍了哈氏合金B-3的特点以及腐蚀、焊接等性能,根据多个醋酸等工程的设计工作经验,并跟踪了解哈氏合金B-3制设备的加工全过程,参考相关标准规范,总结了哈氏合金B-3制换热器在设计、制造各方面注意的要点,认为采用平封头和松套法兰结构较合理、柔性胀接比较适合镍基合金换热管与管板的结合、B-3材料设备制造的关键技术是热处理。     

哈氏合金B3(N10675)板材焊接工艺评定

哈氏合金B3(N10675)材料是一种奥氏体Ni-Mo合金,具有良好的耐腐蚀性能,在化工设备中应用前景广阔,本文主要对哈氏合金B3(N10675)材料的化学成分、物理性能、焊接性进行了分析,确定焊接工艺对其进行焊接工艺评定。通过焊接检验,焊缝具有优良的力学性能和抗晶间腐蚀性能,满足了产品技术标准要求和用户要求,为设备制造打下了良好的基础。     

哈氏合金B3工艺管道的焊接

哈氏合金B3是哈氏合金系列产品的一个品种,哈氏合金属于镍基合金。其中B系列合金是镍钼合金,B3合金对于任何温度和浓度的盐酸都有极好的抗腐蚀性,凡使用盐酸介质场合,B3合金管道及容器均可适用。文章通过分析哈氏合金B3的焊接特性、焊接方法、焊接要点,系统探讨了哈氏合金B3工艺管道的焊接整个过程。     

哈氏合金的清洗

哈氏合金广泛应用于化工及其他行业中,适应各种苛刻的腐蚀环境.本文介绍了哈氏合金的发展历史、特点、类型以及在安装制造过程中的清洗方式.     

哈氏合金薄板衬里的制作和应用

1 前言。虽然哈氏合金有着其他材料所无法比拟的综合耐腐蚀性能．但它的价格通常会让很多用户望而却步：在一些情况下，虽然不锈钢无法胜任，但哈氏合金的设备却可以在使用十年之后腐蚀可能连1mm都不到。如果哈氏合金仅仅只是为了设备的强度和刚度．那就非常浪费了。这时候有人就会选择使用爆炸复合板。但是．如果整个系统是运行在正压或者常压条件     

关于哈氏C-2000合金SMAW方法的焊接工艺探讨

哈氏C-2000合金是哈氏家族"C"合金成员,是美国Haynes国际公司本世纪创新之作,属于Ni-Cr-Mo合金,UNS编号为:N06200。该材料在国内应用案例较少,通过研究、分析该材料的焊接性,选择SMAW(焊条电弧焊)的焊接方法,按NB/T47014进行焊接工艺评定,制定合理的焊接工艺及措施,对保证焊接质量,满足设备使用要求,推广该材料在压力容器上的应用具有一定的指导作用。     

哈氏合金的焊接

介绍了哈氏合金的可焊性试验 ,并给出了哈氏合金容器纵缝的焊接工艺。     

哈氏合金设备的设计与施工

介绍哈氏合金的类型及耐腐蚀性能,从设计、成型、焊接和机械加工等方 面提出了制造哈氏合金设备的有关注意事项。     

Morphology,mechanical, and dielectric breakdown properties of PBT/PET/TPE,PBT/PET/PA66, PBT/PET/LMPE,and PBT/PET/TiO2 blends

The morphology and thermal behavior of tertiary blends of poly(butylene terephthalate) [PBT]/poly(ethylene terephthalate) [PET] alloy resin (Alloy)/thermoplastic elastomer (TPE), Alloy/nylon 66 (PA66), Alloy/low molecular weight polyester (LMPE), and Alloy/titanium dioxide (TiO₂) have been investigated by scanning electron microscopy, differential scanning calorimetry, and thermogravimetry (TG). In case of TPE and LMPE containing blends did not show any morphological change compared with Alloy whereas for PA66 containing blends, the size of the dispersed phase increased with the increase the PA66 contents. The crystallization peak of Alloy/TPE blends became undetectable with an increasing TPE content. In contrast, the crystallization temperature (T_c1) of Alloy/PA66, Alloy/LMPE, Alloy/TiO₂ blends increased significantly as the PA66, LMPE, and TiO₂ content increases. TG traces show a significant shift of the weight loss towards higher temperature for Alloy/TiO₂ blend whereas Alloy/TPE, Alloy/PA66 and Alloy/LMPE blends slightly decreases in thermal stability than Alloy. To investigate the applicability for insulation material, the prepared blend samples were extruded an electric wire and the breakdown voltage (BDV) of wires was investigated. The melt flow rate of Alloy increased as the amount of TPE increased, and a contrary trend was found when the increase of the amount of TiO₂. The dielectric breakdown test applies a voltage that is greater than the product's rated operating voltage for a specific period of time during which dielectric breakdown must not occur. The BDV of Alloy/TPE and Alloy/PA66 blends is higher than other blends before and after thermal aging 225°C for 30 min. POLYM. COMPOS., 2008. © 2008 Society of Plastics Engineers     

钛设备在环丙装置中的应用

论述了钛及钛合金设备在环丙装置中的应用现状，分析了钛及钛合金材料在环丙装置中的耐腐蚀性能、机械性能及经济效果对比，并针对部份钛设备存在的失效现象和缺陷提出了改进措施。     

哈氏B-3合金大型压力容器的研制

介绍了哈氏B-3合金材料的性能、特点,分析了采用哈氏B-3合金材料制造大型压力容器的难点。提出了哈氏B-3合金大型设备的制造要求和针对难点采取的措施,成功制造了世界首台B-3合金大型压力容器。     

氯离子对典型不锈钢材料腐蚀的EIS分析

以Alloy 690、Alloy 600和X80 3种典型的不锈钢材料为研究对象,利用电化学阻抗谱实验得到了3种材料在不同浓度的KCl溶液中的阻抗谱特性。实验表明Alloy 690、Alloy 600和X80的抗氯离子腐蚀性能依次降低,当氯离子含量比较少时,随着氯离子浓度的增加,腐蚀的倾向性逐步增加;但当氯离子含量超过一定值时,继续增加氯离子,腐蚀的倾向性反而会减小。R(QR)(QR)电路能够在各种情况下较好地拟合阻抗谱数据,等效电路拟合后的数据表明:外层氧化膜的电阻相对较小,可能会含有可供溶液离子扩散的通道,具有非理想电容器特征;内层氧化膜的结构对材料的抗腐蚀性能影响明显,内层氧化膜阻值突然变小是由于电子通过费米能级从金属向氧化膜渗透。     

哈氏合金C-276在PTA装置中的应用

阐述了哈氏合金C-276在PTA装置中的应用,并对C-276的焊接特性、固熔热处理、耐腐蚀性能等特点进行分析,介绍了C-276在PTA装置中的使用情况,说明C-276比钛材更适合制造PTA装置中反应器内件。     

Transpassive dissolution of Ni-Cr alloys in sulphate solutions—comparison between a model alloy and two industrial alloys

The application of a general model for the transpassive dissolution mechanism of binary Ni-based alloys to industrial alloys, Alloy 600 and Alloy C276, containing Ni, Cr, Fe and Mo, in 1 M sulphate solutions at pH 0 and 5 is described. A comparison of the electrochemical behaviour of these two alloys to a binary Ni-15%Cr alloy is also included. The techniques used were ring-disc voltammetry, impedance spectroscopy and resistance measurements. Soluble high-valency products were found to be released in a considerable amount from all the materials. The presence of Mo in Alloy C276 was found to increase the transpassive oxidation rate in comparison to alloys 600 and Ni-15%Cr at pH 0, but the same effect of Mo is not so well pronounced at pH 5. The mechanism of transpassive dissolution was found to be similar on every material at pH 0. At pH 5 the mechanism of the transpassive dissolution on Alloy C276 at high overpotentials is different from that at low overpotentials or from that at pH 0. This change is concluded to be due to the increased effect of adsorbed intermediates at the film/solution interface. The model was found to reproduce the steady state current and the impedance spectra satisfactorily.