Thermal conductivity theoretical examination concerning characteristics of welding distortion produced by multiple heat sources
Thermal conductivity theoretical examination concerning characteristics of welding distortion produced by multiple heat sources
复制标题
多热源焊接变形特性的导热理论检验
DOI：
10.1080/09507110701668796
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发表时间：
2007
影响因子：
--
通讯作者：
Masao Toyoda
中科院分区：
文献类型：
--
作者：
Shigetaka Okano;M. Mochizuki;Masao Toyoda
焊接过程中产生的焊接变形会对焊接结构的强度和性能产生各种不利影响，并影响产品的视觉效果。因此，准确地理解这一现象并减少其影响是一项重要的技术任务。目前，已开发出各种有效的焊接变形减少技术，适用于所有类型的材料;这些技术可根据焊接操作期间的应用时间大致分为以下3种类型：1在焊接操作之前进行预处理以防止变形1，2 2减少焊接过程中发生的直接变形的方法3焊接完成后的校正。2可以自信地说，在这些方法中，预处理和焊后校正是需要在焊接之前和之后通过额外工艺进行某种处理的技术。相反，从焊接结构制造工艺合理化的进一步发展趋势的最近方面来看，通过精确控制以及通过焊接时的工艺控制来预测和减少焊接变形的要求越来越高。从工艺控制和成本的观点来看，这种减少和控制焊接过程中变形的概念是理想的方法。为了控制焊接过程中的焊接变形，尝试了在一定的焊接条件范围内，通过参数来预测和评价焊接变形。例如，Sato和Terasaki报告说，横向收缩和角变形可以使用热输入参数Q/h 2进行准确评估。3此外，关于多热源产生的焊接变形特性的热导率理论研究
Welding distortion occurring during the welding operations is capable of causing various adverse effects upon the strength and performance of welded structures as well as spoiling the visual effect of products. Consequently, it is an essential technical task to understand this phenomenon accurately and to reduce its effects. Hitherto, a variety of effective welding distortion reduction techniques have been developed for all types of materials; these can be divided broadly by time of application during the welding operation into the following 3 types: 1 pre-treatment in anticipation of distortion prior to welding operations1,2 2 methods to reduce directly distortion occurring during welding 3 correction after the completion of welding.2 It may confidently be stated that, amongst these, pretreatment and the postweld correction are the techniques requiring some sort of treatment by means of extra processes before and after welding. In contrast, from recent aspects of trends in the further development for rationalization of the manufacturing process of welded structures, there has been an increasing requirement for the prediction and reduction of welding distortion by means of precision control and also by means of process control whilst welding. Such concepts for the reduction and control of distortion during the welding process are desirable methods from the viewpoint of process control and cost. An attempt has been made to predict and evaluate the welding distortion by means of parameters based upon a range of welding conditions as a measure to control welding distortion during the welding process. For instance, Sato and Terasaki reported that transverse shrinkage and angular distortion can be accurately evaluated using heat input parameter Q/h2.3 Furthermore, Thermal conductivity theoretical examination concerning characteristics of welding distortion produced by multiple heat sources
影响因子：
2.1
作者：
M. Mochizuki;H. Yamasaki;Shigetaka Okano;M. Toyoda
通讯作者：
M. Mochizuki;H. Yamasaki;Shigetaka Okano;M. Toyoda