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首页> 外文期刊>Sodagem & inspecao >Estudo de Procedimentos de Soldagem MIG/MAG para Aplica?§?￡o de Revestimentos de Liga de N?-quel Inconel 625 em A?§o Estrutural ASTM A387 Gr.11
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Estudo de Procedimentos de Soldagem MIG/MAG para Aplica?§?￡o de Revestimentos de Liga de N?-quel Inconel 625 em A?§o Estrutural ASTM A387 Gr.11

机译：在结构钢中使用Inconel 625镍合金涂层的MIG / MAG焊接工艺研究ASTM A387 Gr.11

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摘要

This work aims to study welding techniques applied to repair of components made of ASTM A387 Gr.11 steel, widely used in the oil and gas industry. Due to the working conditions it is needed use materials having good strength and corrosion resistance. UNS N06625 Ni-based alloy (Inconel 625) was used as the filler metal. MIG / MAG welding process was used to apply the temper bead welding technique with two layers. The methodology of this study was divided in stages, in the first one, exploratory trials were carried out to define the relevance of the studied control factors. In the second step, hardness and microstructure criteria were applied for defining the best heat input relations for the application of the double layer technique. The double layer technique was effective in improving the properties of the microstructure in heat affect zone coatings, it was found intense grain refinement. There was also a reduction in microhardness and hardness measurements. For both used shielding gases (Ar + 25% He and Ar + 4% CO2) have been achieved heat input relations with positive deviations. In all these relations the heat input of the second layer is greater than the heat input of the first layer.
机译：这项工作旨在研究焊接技术，该技术可用于修复广泛用于石油和天然气行业的ASTM A387 Gr.11钢制成的部件。由于工作条件，需要使用具有良好强度和耐腐蚀性的材料。将UNS N06625镍基合金（Inconel 625）用作填充金属。采用MIG / MAG焊接工艺将回火焊道焊接技术应用于两层。这项研究的方法分阶段进行，在第一个阶段，进行了探索性试验，以确定所研究的控制因素的相关性。第二步，应用硬度和微观结构标准定义双层技术的最佳热输入关系。双层技术有效地改善了热影响区涂层中的显微组织的性能，发现强烈的晶粒细化。显微硬度和硬度测量值也降低了。对于这两种使用过的保护气体（Ar + 25％He和Ar + 4％CO2），已经实现了具有正偏差的热输入关系。在所有这些关系中，第二层的热输入大于第一层的热输入。

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