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一、前言冬季焊接工作对我们来说是此较生疏的。为加强这方面的技术研究和取得可靠的根据,我们对电站设备常用的20号低碳钢和15XM低合金钢在低温状态下的焊接工艺和接头技术特性,进行了探讨性的研究,获得了值得进一步研究的线索和改进今后焊接工艺的资料。感到不足的是,我们的试验与研究条件较差,很多种试样未能加倍制作,甚至有的试样因试验条件不
First, the preface Winter welding work for us is more unfamiliar. In order to strengthen the technical research in this field and obtain a reliable basis, we have carried out exploratory research on the welding technology and the technical characteristics of the joints of low-carbon steel of 20 # and low-alloy steel 15XM commonly used in power station equipment, Worth further study of the clues and improve the future of welding process information. Feel enough is that our experimental and research conditions are poor, many kinds of samples failed to double production, and even some of the test conditions because of the test