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Microstructure and Mechanical Properties of Internal Thread during Cold Extrusion for Q460 High Strength Steel
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Hong MIAO1, Dun-Wen ZUO2, Rui-Hong ZHANG1
Chinese Journal of High Pressure Physics | 2013, 27(3) : 337 - 342
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Chinese Journal of High Pressure Physics | 2013, 27(3): 337-342
Microstructure and Mechanical Properties of Internal Thread during Cold Extrusion for Q460 High Strength Steel
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Hong MIAO1, Dun-Wen ZUO2, Rui-Hong ZHANG1
Affiliations
  • 1.College of Mechanical Engineering, yangzhou University, yangzhou 225000, China
  • 2.Mechanical Engineering Institute, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Published: 2013-06-15
Outline
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According to the forming process of internal thread, the microstructure, microhardness and mechanical properties of internal thread surface layer were investigated. The microstructure change and deformation mechanism, harden ability and depth of hardening layers on the crest, the flank and the root of the thread along the layer depth direction were obtained. The results showed that the grains on the surface layers of the thread were refined after the cold extrusion. Fibrous structure of the metal surfaces on the root of thread was pressed to distinguish the grains difficultly, and formed a layer of flown line and smoothly rounded the root to flow from the flank to the crest. The grains on the root were the smallest, followed by the flank and the crest. In the extrusion processes, the microhardness and the tensile strength of the material were increased significantly, and the plasticity and the toughness were decreased. The work-hardening phenomenon greatly increased the surface texture and the mechanical strength of internal thread with cold extrusion.

internal thread  /  extrusion process  /  microstructure  /  mechanical properties
缪宏, 左敦稳, 张瑞宏. Q460高强度钢冷挤压内螺纹的表层显微组织及力学性能. 高压物理学报, 2013 , 27 (3) : 337 -342 .
Hong MIAO, Dun-Wen ZUO, Rui-Hong ZHANG. Microstructure and Mechanical Properties of Internal Thread during Cold Extrusion for Q460 High Strength Steel[J]. Chinese Journal of High Pressure Physics, 2013 , 27 (3) : 337 -342 .
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Article Info
  • Receive Date：2011-04-21
  • Online Date：2026-11-05
  • Published：2013-06-15
Article Data
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History
  • Received：2011-04-21
  • Revised：2011-10-12
Funding
Affiliations
    1.College of Mechanical Engineering, yangzhou University, yangzhou 225000, China
    2.Mechanical Engineering Institute, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
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Citations
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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