Effect of post-weld heat treatment on friction welded joint of carbon steel to stainless steel
Effect of post-weld heat treatment on friction welded joint of carbon steel to stainless steel
复制标题
焊后热处理对碳钢与不锈钢摩擦焊接头的影响
DOI：
10.1016/j.jmatprotec.2015.08.004
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发表时间：
2016
影响因子：
6.3
通讯作者：
Fu Banglong
中科院分区：
文献类型：
--
作者：
Ma Hong;Qin Guoliang;Geng Peihao;Li Fei;Meng Xiangmeng;Fu Banglong
采用摩擦焊方法对1045碳钢和304不锈钢进行了焊接，并对焊接接头进行了不同焊后热处理温度的热处理。焊态接头界面平直明显，焊后热处理后界面模糊，元素扩散严重。焊后热处理温度越高，焊缝界面处生成的碳化物（Cr，Fe）7C3和Cr7C3越多。在热机械影响区（TMAZ），焊接接头碳钢侧组织不均匀，而400 °C焊后热处理后组织均匀。断口分析表明，碳钢侧TMAZ中的碳化铬含量和组织不均匀是影响接头断裂机制和性能的重要因素。经400 °C焊后热处理后，接头的抗拉强度和延伸率得到了大幅度提高，可达到与不锈钢相当的强度和与碳钢相当的延伸率，这是由于接头的显微组织得到了一定程度的均匀化，且碳化铬的含量几乎没有增加。焊后热处理后，接头的断裂方式也由焊态的准解理断裂转变为韧窝断裂和准解理断裂的复合断裂。
1045 carbon steel was joined to 304 stainless steel by friction welding, and the joint was heat treated at different post-weld heat treatment (PWHT) temperature. The weld interface of as-welded joint was straight and obvious, whereas, it became indistinct after PWHT characterized by severe element diffusion. Chromium carbides such as (Cr, Fe)7C3and Cr7C3formed at the weld interface, the amount of which increased with the PWHT temperature increasing. In thermo-mechanically affected zone (TMAZ), the microstructure at carbon steel side of as-welded joint was quite heterogeneous, while it became homogeneous after PWHT at 400 °C. Analyses of fracture surfaces showed the amount of chromium carbide and the heterogeneous microstructure in TMAZ at carbon steel side were crucial factors in influencing fracture mechanism and properties of joints. Tensile strength and elongation of the joint were improved substantially after PWHT at 400 °C, which could reach up to the equivalent strength of stainless steel and elongation of carbon steel, because the microstructure became homogeneous to some extent and the amount of chromium carbides barely increased. The fracture mode also altered from quasi-cleavage fracture in as-welded joint to the combination of dimple fracture and quasi-cleavage fracture after PWHT.
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DOI：
10.1016/j.msea.2011.11.055
发表时间：
2012-02-01
影响因子：
6.4
作者：
Chandra, K.;Kain, Vivekanand;Chakravartty, J. K.
通讯作者：
Chakravartty, J. K.
影响因子：
0.6
作者：
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影响因子：
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作者：
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影响因子：
8.4
作者：
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通讯作者：
D. Ananthapadmanaban;V. S. Rao;N. Abraham;K. P. Rao
影响因子：
6.3
作者：
B. Kurt
通讯作者：
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