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    XU Hong-ji, SONG Bing-xin, CHANG Li, JIN Guang, LI Hua, SU Qin. Microstructures and Mechanical Properties of the Welded Joints of 20Cr Steel and Level-B Steel[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2009, 45(3): 138-141.
    Citation: XU Hong-ji, SONG Bing-xin, CHANG Li, JIN Guang, LI Hua, SU Qin. Microstructures and Mechanical Properties of the Welded Joints of 20Cr Steel and Level-B Steel[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2009, 45(3): 138-141.

    Microstructures and Mechanical Properties of the Welded Joints of 20Cr Steel and Level-B Steel

    • Microstructures and properties of 20Cr steel and level-B steel joints welded by gas metal arc welding with ER50-6 wire are investigated with low-temperature impact,room-temperature tensile test,hardness test and metallographic analysis. The results show that the joints welded by gas metal arc welding with ER50-6 wire have better performance and more strength than parent metal. The microstructure of welded metal mainly contains reticular proeutectoid ferrite and a little carbon-free bainite. Carbon-free bainite also appears in the HAZ of 20Cr steel together with little lath martensite ,while in the HAZ of level-B steel ,little granular bainite distributes on the blocky ferrite.
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