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Study on Welding Performances of 1 100 MPa Grade Ultra High Strength Steel for Lifting Arm of Heavy Machinery
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Hao Li1, Yue Xue1, Xin Dai1, Jun Zhang1, Jie Liu1, Li Huang2
Science & Technology of Baotou Steel | 2023, 49(5) : 66 - 70
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Science & Technology of Baotou Steel | 2023, 49(5): 66-70
• Variety Quality and Experimental Study •
Study on Welding Performances of 1 100 MPa Grade Ultra High Strength Steel for Lifting Arm of Heavy Machinery
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Hao Li1, Yue Xue1, Xin Dai1, Jun Zhang1, Jie Liu1, Li Huang2
Affiliations
  • 1 CSP Plant of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
  • 2 Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010,;Inner Mongolia Autonomous Region, China
Published: 2023-10-25
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The continuous cooling transformation (CCT) curves of Q1100D steel in cooling process are obtained through the thermal simulation of welding process with Gleeble-3800 testing machine. The microstructure and properties of welded joints under different heat inputs are tested with such methods as the Y-slit welding cold crack test, metallographic analysis and mechanical performance test. The results showed that the ultra high strength steel Q1100D for lifting arm of heavy machinery of Baotou Steel was with better cold check resistance. It could be welded without preheating at room temperature with the condition of a little heat input; with the condition of greater heat input, cold cracks are not observed on the surface and cross section, which indicates that Q1100D steel plate is with good cold check resistance. The evaluation results of comprehensive mechanical and structure properties of the joint indicate that the Q1100D steel plate with thickness of 14 mm is with optimum mechanical properties (tensile, bending and impact) of welded joint under heat input of 1.05 kJ/mm.

high strength steel  /  weldability  /  heat input  /  metallographic structure
Hao Li, Yue Xue, Xin Dai, Jun Zhang, Jie Liu, Li Huang. Study on Welding Performances of 1 100 MPa Grade Ultra High Strength Steel for Lifting Arm of Heavy Machinery[J]. Science & Technology of Baotou Steel, 2023 , 49 (5) : 66 -70 .
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Article Info
  • Receive Date：2023-08-12
  • Online Date：2025-11-21
  • Published：2023-10-25
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  • Received：2023-08-12
Affiliations
    1 CSP Plant of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
    2 Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010,;Inner Mongolia Autonomous Region, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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