| 船舶焊接CO2气体保护单面焊气孔成因探讨 |
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| 引用本文： | 刘孝曾 张德林. 船舶焊接CO2气体保护单面焊气孔成因探讨[J]. 船舶工程, 1997, 0(6): 28-30,60 |
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| 作者姓名： | 刘孝曾 张德林 |
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| 作者单位： | 华东船舶工业学院(刘孝曾，于治水，沈巧玲)，沪东造船厂(张德林，胡永强，金戈天) |
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| 摘 要： | ＣＯ２气体保护半自动单面焊用于船舶焊接，提高了焊接质量，减轻了焊工的劳动强度，半缩短了造船周期。但是单面焊打底层焊缝中出现的沿焊缝柱状晶结晶方向的柱状气孔，严重地影响着船舶焊接质量。
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| 关 键 词： | 气体保护 单面焊 气孔 船舶 焊接 二氧化碳 |
Cause Study of Porosities Formation in Semiautomatic CO_2 Arc Welding by One Side with Ceramic Backing Strip |
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| Liu Xiaozeng,Yu Zhishui. Cause Study of Porosities Formation in Semiautomatic CO_2 Arc Welding by One Side with Ceramic Backing Strip[J]. Ship Engineering, 1997, 0(6): 28-30,60 |
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| Authors: | Liu Xiaozeng Yu Zhishui |
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| Affiliation: | Liu Xiaozeng;Yu Zhishui |
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| Abstract: | When the CO_2 arc welding by one side with ceramic backing strip is applied in shipbuilding semiautomatic welding procedure, the quality of welding can be approved, the labor intensity of welder will be reduced and consequantly the period of shipbuilding will be shorten. But in the backing welding, columnar grain-growth will be appeared in the direction of crystal direction, it effects the welding quality seriously . In order to avoid this kind of damage, an experiment has been carried out in the laboratory to simulate the condition. Through macro and micro analysis for the same columnar porosity obtained, the main cause is discovered and some preventive measures are suggested accordingly. |
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| Keywords: | CO_2 welding by side Ceramic backing Porosity |
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