Effect of high temperatures on mechanical properties of seam metal of low-carbon low-alloy steel welded joint

2021 ◽  
pp. 33-38
Author(s):  
S. A. Nikulin ◽  
◽  
S. O Rogachev ◽  
V. A. Belov ◽  
V. Yu. Turilina ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Comparative Analysis ◽  
Alloy Steel ◽  
Room Temperature ◽  
Weld Seam ◽  
Welded Joint ◽  
Low Carbon ◽  
Low Alloy Steel ◽  
Plastic Properties ◽  
Temperature Range

The mechanical properties of the seam metal of a low-carbon low-alloy steel welded joint of the 22K type (Russian standard) have been investigated when testing for uniaxial tension in the temperature range from room temperature to 1200 °C. A comparative analysis of the changes in the structure, the strength and plastic properties of base metal and weld seam metal in the selected temperature range was carried out.

Research on Microstructure and Properties in Welded Joint of 700 MPa Grade Low Carbon Micro-Alloy Steel

2015 ◽  
Vol 1088 ◽  
pp. 174-180
Author(s):  
Jian Feng Gu ◽  
Yi Xiao ◽  
Kai Jun Zhou ◽  
Dong Dong Dai ◽  
Qing Dong Zhong
Keyword(s):  
Mechanical Properties ◽  
Alloy Steel ◽  
Base Metal ◽  
Weld Seam ◽  
Welded Joint ◽  
Fracture Morphology ◽  
Tensile Fracture ◽  
Metallographic Analysis ◽  
Low Carbon ◽  
Welding Joint

Microstructure and mechanical properties of automobile beam used BS700MC low carbon micro-alloy steel welding joint were investigated by cold crack sensitivity, microhardness test, bending, impact, tensile and metallographic analysis. The results showed that the BS700MC steel has better crack resistance, and without heat treatment before welding with the WH80-G welding wires. The microstructure of joint’s weld seam is acicular ferrite, very little bainite and proeutectoid ferrite. The hardness value of weld seam zone is 380 HV and is the same as that of base metal. But the lower of weld joints rigidity has obvious fluctuations, and the HAZ appears softened phenomenon. The welding joint has good impact toughness only between 20 and minus 20 degrees Celsius.The tensile strength of BS700MC welded joint reaches 815 MPa, 97.1% of base metal, fracture position in HAZ. Tensile fracture morphology is mixed type indicating dimple and cleavage steps, and welding joint have good comprehensive mechanical properties.

Effect of High Temperatures on the Mechanical Properties of the Weld Metal in the Welded Joint of Low-Carbon Low-Alloy Steel

2021 ◽  
Vol 2021 (10) ◽  
pp. 1314-1319
Author(s):  
S. A. Nikulin ◽  
S. O. Rogachev ◽  
V. A. Belov ◽  
V. Yu. Turilina ◽  
N. V. Shplis
Keyword(s):  
Mechanical Properties ◽  
Weld Metal ◽  
Alloy Steel ◽  
High Temperatures ◽  
Welded Joint ◽  
Low Carbon ◽  
Low Alloy Steel

Effect of cooling rate on microstructure and mechanical properties of a low-carbon low-alloy steel

2020 ◽  
Vol 56 (5) ◽  
pp. 3995-4005
Author(s):  
Guofang Liang ◽  
Qiyang Tan ◽  
Yingang Liu ◽  
Tao Wu ◽  
Xianliang Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Alloy Steel ◽  
Low Carbon ◽  
Low Alloy Steel ◽  
Microstructure And Mechanical Properties

Microstructure and Mechanical Properties of Submerged Arc Welding Filled with Ni Wire Dissimilar Joints Comprising SUS304 and Q245R

2014 ◽  
Vol 936 ◽  
pp. 1780-1785
Author(s):  
Peng Xian Zhang ◽  
Peng Zhao ◽  
Yan Quan Cui
Keyword(s):  
Mechanical Properties ◽  
Weld Metal ◽  
Alloy Steel ◽  
Arc Welding ◽  
Molten Pool ◽  
Welded Joint ◽  
Submerged Arc Welding ◽  
Low Alloy Steel ◽  
Allocation Process ◽  
Submerged Arc

Aim at the issue that the bending crack is easy to generate inside dissimilar welded joint of low alloy steel and stainless steel, a new process of submerged arc welding filled with Ni wire is put forward. The influence mechanism of filling quantity of Ni wire to the joint of microstructure evolutions and mechanical properties is mainly explored based on the contrast test of non-filling Ni wire and three different filling speeds of Ni wire. The experiment results indicate that, the filling process of Ni wire supplies austenite forming element, and alters heat allocation process of molten pool. The filling quantity of Ni wire is the quantitative parameter, it is used to control the transition width between low alloy steel and weld metal, also to adjust the peak temperature and holding time at elevated temperature of molten pool. When the value of the filling quantity of Ni wire is determined, the problem of bending crack in the fusion zone of low alloy steel can be solved, and also the overheat damage can be eliminated. At the same time, the grains of weld metal and heat affected zone are refined. And on this basis the plasticity, toughness and microhardness of welded joint can be guaranteed.

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