论文部分内容阅读
本文是15MnVN钢板焊接接头性能研究工作的一部分,着重介绍在常温至-80℃的温度范围内,15MnVN钢板母材和对接接头裂纹张开位移(COD)与断口微观组织结构的关系,力图找出它们的内在联系。为评定母材和对接接头的断裂韧性,制定焊接工艺规范以及为桥梁设计提供依据。一试验与试件制备1 试验目的全部试验工作均在常温至-80℃的温度范围内进行,具体试验项目为:(1)测量母材在不同温度条件下的J积分和COD(裂纹张开位移)。(2)在焊接热输入量分别为30千焦/厘米、40千
This paper is a part of the research work on the performance of 15MnVN steel welded joints. It focuses on the relationship between the crack open displacement (COD) and fracture microstructure of 15MnVN steel plate and butt joint in the temperature range from room temperature to -80 ℃, Their internal relations. To assess the fracture toughness of the base metal and butt joint, to develop welding process specifications and provide the basis for the design of the bridge. A test and test piece preparation 1 purpose of the test All the test work at room temperature to -80 ℃ temperature range, the specific test items are: (1) to measure the J base material under different temperature conditions and COD (crack open Displacement). (2) In the welding heat input volume was 30 kJ / cm, 40 k