Effects of temperature on tensile and impact behavior of dissimilar welds of rotor steels
Effects of temperature on tensile and impact behavior of dissimilar welds of rotor steels
复制标题
温度对转子钢异种焊缝拉伸和冲击性能的影响
DOI：
10.1016/j.matdes.2010.01.055
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发表时间：
2010-08-01
影响因子：
8.4
通讯作者：
Xuan, Fu-Zhen
中科院分区：
文献类型：
--
作者：
Zhu, Ming-Liang;Xuan, Fu-Zhen
对新研制的23CrMoNiWV88和26NiCrMoV145转子钢异种焊接接头在350℃以下不同温度进行了拉伸和冲击性能测试。观察到异种焊接接头沿其方向存在不均匀的微观结构和不对称的显微硬度。随着温度升高，强度下降，同时塑性增加，并且在约300℃时，断裂位置从焊缝金属（WM）转变为中压（IP）母材（BM）。与在断口表面有两个断裂区的均质冲击试样相比，当测试温度在0 - 40℃范围内时，在异种焊接接头的断口表面观察到一种具有三个区域的准解理与韧性断裂混合模式。分离区域的出现主要归因于多层焊接工艺，从而提高了焊接接头的冲击韧性。（c）2010爱思唯尔有限公司。保留所有权利。
Tensile and impact behavior of dissimilar weld joints of newly developed rotor steels 23CrMoNiWV88 and 26NiCrMoV145 were conducted at various temperatures below 350 degrees C. Inhomogeneous microstructures and asymmetrical micro-hardness along the dissimilar welding joint were observed. With the increase of temperature, strength decreased which was associated with the increased plasticity, and fracture location changed from weld metal (WM) to intermediate pressure (IP) base metal (BM) at around 300 degrees C. Compared to the homogeneous impact specimen with two fracture zones at fracture surface, a combined quasi-cleavage and ductile fracture mode with three zones is observed at the fracture surface of the dissimilar weld joint when the testing temperature is in the range of 0-40 degrees C. The occurrence of separated zones are mainly ascribed to the multi-layer welding process and thus improved the impact toughness of the welding joint. (c) 2010 Elsevier Ltd. All rights reserved.