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Monotubular heater is an important apparatus in Bayer process of alumina extraction used in Pingguo Aluminum Company. However, since several years cracking in its weld joints occur and the production process is then interrupted by leaking of liquor.

单管预热器是平果铝拜尔法生产氧化铝的重要设备,经常在其焊缝区发生开裂泄露,影响生产,必须对造成其开裂的主要原因进行研究并提出有效的防护措施,以延长其使用周期。

The test results indicate that T2 Cu/2A50 Al alloy must first be done by blacksmith welding, and then heated between 515℃ and 525℃ for 180 min, the sample pressure is offered by heating and insulation in the process through special fixture, the joints of T2Cu/2A50Al alloy with metallurgy bond can be obtained, and there is obvious welding seam in the interface.

试验结果表明,T2铜/2A50铝合金,采用先锻接,后加热到515~525℃之间,保温180 min,并在加热和保温过程中通过特殊的夹具提供给试样压力,能得到冶金结合的T2铜/2A50铝合金接头,接头界面处出现了明显的焊缝

Both monotonic axial compressive and axially loaded cyclic tests have been carried out on the steel box brace used in New CCTV Building to investigate the effect of assembling welds including full penetration and partial penetration on the structural behavior of the brace.

为考察全熔透和部分熔透两种组装焊缝形式对箱形截面钢支撑受力性能的影响,本文对中央电视台新台址建设工程中的箱形截面支撑进行了单调受压、轴向反复拉压试验;同时,采用ABAQUS有限元软件实现了对部分熔透试件未熔透处的接触模拟和滞回性能模拟。

Firstly, this paper simulated rationally the welding line of the connect parts of brake beam, after that, calculated, analyzed, and compared the structure intensity of several schemes about designed K3 type bogie brake beam.

首先对制动梁各连接部位的焊缝进行合理模拟,然后对设计的K3型转向架制动梁的几种方案进行结构强度计算、分析、对比,最后提出改进意见。

A mathematic model,which deals with the relationship between maximum temperature of thick plate butt multipass welding and weld heat input,interpass temperature,ambient temperature and the distance of measuring points to heat source center,was founded using multivariant nonlinear regression analysis.

采用多元非线性回归的方法,建立了厚板对接多道焊的最高温度与焊接线能量、层间温度、环境温度以及测点到热源中心的距离之间的数学模型。通过相关性检验、线性回归的显著性检验以及回归系数的显著性检验,证明了模型可行;同时分析了回归系数与测点到焊缝中心距离之间的关系。结果表明,它们之间的关系是一种非线性关系,而且呈现出了一定的变化趋势

To get a property comparison of GXHJ- 1 sintered welding agent with SJ101 sintered welding agent, related tests were carried out, including deposited metal test, lab butt- joint plate test, single- welding stick operation test, double- welding stick operation test as well as operation test with H08C welding stick, focusing differences of the two in terms of technological properties and weld seam impact toughness.

为了比较 GXHJ- 1和 SJ101两种烧结焊剂的性能,分别从熔敷金属性能试验、实验室对接板试验、单丝焊生产、双丝焊生产等方面及在匹配 H08C焊丝的条件下进行了工艺性能和焊缝冲击韧性对比。

Such as the 12mm plate butt welded flat bottom closure φ3.2mm the electrode selection, welding current :80-85A, filling, cover the surface layer of the electrode selection φ4.0mm, welding current :165-175A, a reasonable choice welding current and electrode diameter, easy to control bath temperature, is the basis for forming weld.

如12mm平板对接平焊的封底层选用φ3.2mm的焊条,焊接电流:80-85A,填充,盖面层选用φ4.0mm的焊条,焊接电流:165-175A,合理选择焊接电流与焊条直径,易于控制熔池温度,是焊缝成形的基础。

This paper successfully developed the hot wall hydroprocessing reactor butt welding SAW materials for 2.25Cr-1Mo-0.25V steel.

研制出了大型热壁加氢反应器用2.25Cr-1Mo-0.25V钢容器主焊缝埋弧焊焊材。

The weldability, deposited metals mechanical properties and purity of the new developed shell butt welding SAW material as the same level compared with Kobe Steel US-521HD/PF-500D.

研制的容器主焊缝埋弧焊材与国外典型的埋弧焊焊材在焊接工艺性能和熔敷金属力学性能及纯净度方面对比,结果表明研制焊材与日本神户制钢所的US-521HD/PF-500D焊材相当。

Vent filter flange coupling half of the gearbox casing surrounding the nipple plate washer, square cap or lid latch mechanism of contractile ring connected to the nipple weld Bush returned from aligning roller bearings groove ball bearings self-align.roller Allen screw and thrust bearing ...

耦合一半围绕法兰发泄滤波器变速箱外壳乳头平板垫片,正方形帽或盖子收缩环连接闩机制布什焊缝对乳头返回自调心滚子轴承槽球轴承自我align.roller推力轴承艾伦螺丝与。。。

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