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vanhalen1983金虫 (小有名气)
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根据堆焊技术具有成本低、工艺简单、易操作等特点。目前，国内开发了一种新型贝氏体堆焊焊条，其性能优于传统的堆焊焊条。本文主要研究在冷焊条件下，不同焊接工艺对贝氏体焊条直接堆焊42Cr2Mo钢、20Cr1Mo10钢、45钢以及贝氏体辙叉心轨的堆焊层、热影响区、熔合区的组织、性能的影响。通过对比在不同焊接下得到的组织和缺陷，而得出最佳工艺以满足使用性能。这为实际工程中的焊接应用提供依据。 通过对堆焊层的组织和硬度研究表面：采用贝氏体焊条，焊前不需预热，焊后不用热处理。焊条的工艺性能较好，电弧稳定，飞溅较少，熔化系数大，脱渣性好，焊缝成形好；焊缝组织主要是贝氏体（粒状贝氏体）。焊缝硬度测试表明，焊缝硬度稳定，堆焊层金属硬度明显高于母材，达到了增强其耐磨性的要求。 研究结果表明，在本实验条件下，随着焊接电流和层间温度的增大焊缝熔敷层的组织越细。随着层间温度提高，焊缝的硬度增加。 |
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vanhalen1983
金虫 (小有名气)
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4楼2010-05-14 08:36:18
vanhalen1983(金币+5, 翻译EPI+1): 2010-05-14 08:21:06
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According to welding technology with low cost, simple process, easy to operate and so on. Currently, the domestic development of a new type of bainite surfacing electrode, its performance is better than traditional welding electrode. This paper studies in cold welding conditions, the different welding electrode directly on the welding 42Cr2Mo bainitic steel, 20Cr1Mo10 steel, 45 steel, and bainitic frog heart track surfacing layer, heat affected zone, fusion zone of the organization, performance. By comparing obtained in different organizations and welding defects, which are optimized, in order to meet performance. This practical engineering basis for welding applications. By surfacing layer and the hardness of the surface: The bainite electrodes, welding without preheat, without heat treatment after welding. Good welding technological properties, stable arc, less spatter, melting coefficient, good slag, forming a good weld; weld mainly bainite (granular bainite). Weld hardness tests show that the weld hardness and stability, hardness of deposited metal was higher than the base metal, to achieve an enhanced wear resistance requirements. The results show that under the experimental conditions, with the welding current and the increase of temperature between layers deposited layer of weld thinner. With the temperature increase between layers of weld hardness increase. |
3楼2010-05-13 15:48:18
