Open AccessResearch and Improvement of Welding Repair Technology for Large Steel Castings of Marine Diesel Engine Based on CAD Software
Author(s) -
Zhiqiang Zhao,
Hao Guo
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1648/4/042027
Subject(s) - welding , friction welding , electrogas welding , mechanical engineering , flash welding , diesel engine , engineering , metallurgy , materials science , arc welding , filler metal , automotive engineering
CAD (Computer Aided Drafting) is the Massachusetts Institute of Technology in the United States to propose interactive graphics research program. Marine cast steel parts generally have features such as large cross-section dimensions, complex shapes, and hard to repair once damaged. In this context, this article takes the basic introduction to CAD software as the starting point, focuses on the common cracks and causes of welding cracks in the welding of large steel castings, and takes the repair of diesel engine cylinders as an example to analyze steel castings. Common welding repair methods. This paper analyzes the cracks and causes of weld cracks commonly found in the welding of large steel castings, and take the repair of diesel cylinders as an example, analyzed the common welding repair methods for steel castings. The welding repair through the cylinder shows that under the strict control of the welding process, the heterogeneous cold welding repair process is practically applicable to the on-site repair. And cracks may occur in the nickel-based welds after the diesel engine actually operates. The welding repair process should be strictly controlled and appropriate measures should be taken to eliminate the welding residual stress.