焊接接头

This paper introduces the fatigue strength test of welded joints of 16MnR, 15MnVN and 18MnMoNb steels under small energy lash of heaps of times .

介绍了 16MnR、15MnVN及 18MnMoNb三种钢焊接接头及母材在小能量多次冲击条件下的疲劳强度试验情况。

Creep tests of P91 base material and its welds have been carried out,the creep behavior of P91 studied and creep rupture strength extrapolated by the Isothermal and the L-M parameter methods,followed by creep life estimations of P91 fresh steam pipes.

对P91钢母材和焊接接头进行持久试验，研究P91钢的蠕变特性，采用等温线法和L-M参数法对持久强度进行外推，进而对P91钢制主蒸汽管道的蠕变寿命进行估算。

Impurities of welding joints and metallic phase appearance of welding seam are analyzed and a comparison is made with the welding joist made with a magnesium crucible.

分析焊接接头夹杂物情况和焊缝金相组织形貌，并与使用镁质坩埚的情况进行对比。

The testing results suggests that the increase of H2S concentration will raise the brittleness coefficient, leading to the decrease of corrosion resistance for either X70 base metals or welding joints. Meanwhile, the results reveals that effect of H2S concentration on X70 base metals and welding joints is different: the influence of H2S concentration on welding joints'SSCC is bigger than on base metals'SSCC.

揭示了随着硫化氢浓度的增加，国产X70管线钢及其焊接接头的脆性系数增加，抗腐蚀能力减弱；硫化氢浓度对国产X70管线钢母材和焊缝的SSCC性能有着不同程度的影响：在相同的试验条件下，焊缝的脆性系数显著大于母材的脆性系数，即焊缝较母材的SSCC敏感性大。

According to the results of strength analysis, combining with load spectrum tested on line, fatigue life analysis is executed by Fortran language based on IIW and BS Standards.

在静强度分析的基础上，结合实测载荷谱，用Fortran语言编程，应用IIW和BS标准针对该车典型的焊接接头比较了寿命的评估结果。

Make the list of structure of each product.

完成产品的焊接接头形式表格

Ii The effect of mechanical property nonhomogeneity in weld joint-heterogenous bodies on J integral.

焊接接头非均匀体的力学性能非均匀性对J积分的影响

Iii The effect of mechanical property nonhomogeneity in weld joint-heterogenous bodies on COD.

焊接接头非均匀体的力学性能非均匀性对COD的影响。获得了一些重要结论。

Dynamic fracture process of researched material at different temperature be tested by oscillography impact method.

增加线能量可明显提高调质状态下30CrMnSiNi2A钢焊接接头的抗冷裂能力。

The results show that the orientation of crystal grain is changed and crystal grain is refined by magnetic field. The optimal properties of welded joint appears when magnetic field frequency is 20 Hz.

结果表明，外加纵向磁场通过电磁搅拌作用改变晶粒的结晶方向、细化晶粒，在磁场频率为20 Hz时，焊接接头的力学性能达到最佳。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐