Дослідження особливостей електродугового наплавлення під флюсом стрічковими електродами різного поперечного перерізу

Abstract

Досліджено вплив електродугового наплавлення стрічковими електродами різного поперечного перерізу (різної товщини і ширини) під флюсом різних марок на характер зміни продуктивності процесу наплавлення, відносної маси шлаку при наплавленні, долі участі основного металу в наплавленому і коефіцієнта стійкості (стабільності) процесу наплавлення за струмом та на витрати флюсу, як одного з основних технологічних параметрів процесу наплавлення під флюсом.

In this article there was investigated the effect of electric tape surfacing using tape electrodes of different cross-section (different thickness and width) under flux of different marks on the variation of surfacing process performance, surfacing rate, the relative weight of the slag during surfacing, the share of the base metal in the weld and the coefficient of resistance (stability) of surfacing process using current, as well as on the flux consumption as one of the main technological parameters of the surfacing process under flux. While conducting the research process of electric arc surfacing using tape electrode with thickness of 0,5 and 0,7 mm and width from 20 to 200 mm under flux mark OF-10 and FC-18 the authors found that the increasing of type cross-section was followed by the increase of surfacing productivity and the slight decrease of surfacing rate. At the same time, there was observed some difference in the intensity of productivity increase and the surfacing rate decrease, depending on the mark of flux and the thickness of tape electrode. This is mainly due to a great share of heat released into the electrode gap on the melting of tape electrodes with large cross-section, which ensures high productivity of surfacing process under flux of OF-10 and FC-18 marks on the whole diapason of used width of electrodes, thus the surfacing productivity using the tape with the thickness of 0,7 mm is higher for 8,5–35% than the surfacing productivity using the tape with thickness of 0.5 mm. Meanwhile, at the lower tape width the difference is 32–35%, and for the maximum width – 8,5–13,5%. At the same time, while using the tape electrode with the width of 20–100 mm and the same thickness, the surfacing process productivity remains almost the same regardless of the mark of flux, and the increase of the width to 200 mm provides for the difference increase by 10–12%. The surfacing rate decreases with the increase of electrode tape width, regardless of its thickness and mark of flux; meanwhile, this regularity is observed when applying the tape with a width of 140 mm, and the further increase of its width to 200 mm does not change the value of the surfacing rate.