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BB503钢的焊接工艺及其性能和组织 总被引:1,自引:0,他引:1
研究了不同焊接工艺对微合金化Ti-Nb钢BB503钢板的组织和陛能的影响,寻求最佳的焊接工艺参数。用中、小线能量输入的手工电弧焊(sMAw)、CO2气体保护焊(GMAW)以及埋弧自动焊(SAW)3种不同工艺对25mm厚度的BB503铜板进行多道焊接,对焊接接头进行拉伸、弯曲、冲击、硬度等力学性能测试,并对其中典型试样的焊缝和热影响区的显微组织进行了观察和分析。试验结果表明,BB503钢对中、小线能量焊接的适应性良好。试验参数为实际生产中最佳焊接工艺的制订提供了依据。 相似文献
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高炉热风炉系统是保证高炉生产效率的关键设施。系统的4座燃烧室均座落于高度为16.5 m的钢结构大平台上,炉壳内径为6.1 m,壳体焊接部位的钢板厚度为20~25 mm,全部由BB503新钢种制成。机装公司承接燃烧室的第8带以下的组装和焊接任务,全部焊缝采用CO_2气体保护焊焊接。确保了三号高炉的施工工期和焊接质量;降低了工程成本;提高了焊接水平。1 CO_2气保焊室外、高空焊接技术实现室外、高空BB503钢CO_2气保焊,必须攻破二大难点。①必须掌握BB503钢的焊接工艺。BB503钢是新钢种,首次应用于高炉系统,对它的焊接性能还不清楚,没有… 相似文献
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采用气电立焊工艺对48 mm厚的Q345R钢进行对接焊,焊后对接头进行热处理.根据国标对焊接接头进行拉伸及冲击性能测试,并观察接头的微观组织.结果表明:Q345R适合热输入量小的气电立焊工艺;当电弧电压为(40±5)V、焊接电流为(440±10)A、焊接速率为60 mm/min时,接头抗拉强度可达到515 MPa,冲击韧性满足要求. 相似文献
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运用热弹塑性有限元法,对不同焊接工艺条件下板厚6 mm的AH36钢薄板焊接接头残余变形进行了有限元模拟研究.结果表明,使用不同的焊接方法,纵向挠曲变形和角变形量发生显著变化,采用单一CO2气体保护焊,焊接残余变形量较小;采用CO2气体保护焊+埋弧焊的混合焊方法,焊接残余变形量有所增大;在焊缝背面施加雾化水冷,可以有效控制焊接残余变形,尤其对于控制采用单一CO2气体保护焊的角变形成效显著.为了验证有限元模拟结果的准确性,采用与有限元模拟完全相同的工艺条件对AH36钢薄板进行了焊接残余变形试验,试验结果与数值模拟结论存在一定误差,但基本变化趋势一致,表明采用有限元模拟技术可以预测AH36钢薄板焊接残余变形. 相似文献
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A. A. Babakov 《Metal Science and Heat Treatment》1967,9(10):764-770
Conclusions Highly alloyed steels and alloys are produced in conformity with GOST or technical specifications in thick and thin sheets, beams and channels, bars, hot-rolled and cold-rolled pipe, and rod. Castings are produced in the specialized plant of the Ministry of Chemical and Petroleum Machine Building.The technology of welding stainless steels and alloys is given in [15] and [16].TsNIIChERMET. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 10, pp. 43–50, October, 1967. 相似文献
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模具渗硼工艺及其发展应用 总被引:4,自引:0,他引:4
渗硼是提高模具使用寿命的重要途径,是在金属表面形成高硬度的金属硼化层,显著提高其耐磨性,且具有良好的耐热性和耐蚀性。近年来,随着渗硼工艺逐步改进和完善,已发展了复合渗、多元共渗及低温渗硼工艺,取得了良好的经济效果。 相似文献
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《稀有金属材料与工程》2006,23(4):23-26
结合近年来现场试验与施工实践,分析研究了中小型镍材(工业纯镍)设备与管道的特点、性能、焊接缺陷与产生原因,以及防止与消除其缺陷、优化制造施焊质量的工艺措施,并总结了若干条注意事项。 相似文献
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A. Yu. Tsivadze G. V. Ionova V. K. Mikhalko 《Protection of Metals and Physical Chemistry of Surfaces》2010,46(2):149-169
The possibility of using unique properties of lanthanides in the nanotechnology is demonstrated. The origination of linear
and nonlinear optical properties of lanthanide compounds with phthalocyanines, porphyrins, naphthalocyanines, and their analogs
in solutions and condensed state and the prospects of obtaining novel materials on their basis are discussed. Based on the
electronic structure and properties of lanthanides and their compounds, namely, optical and magnetic characteristics, electronic
and ionic conductivity, and fluctuating valence, molecular engines are classified. High-speed storage engines or memory storage
engines; photoconversion molecular engines based on Ln(II) and Ln(III); electrochemical molecular engines involving silicate
and phosphate glasses; molecular engines whose operation is based on insulatorsemiconductor, semiconductor-metal, and metal-superconductor
types of conductivity phase transitions; solid electrolyte molecular engines; and miniaturized molecular engines for medical
analysis are distinguished. It is shown that thermodynamically stable nanoparticles of Ln
x
M
y
composition can be formed by d elements of the second halves of the series, i.e., those arranged after M = Mn, Tc, and Re.
Prospects of using lanthanide superconductors in nanotechnology are considered. 相似文献