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The effects of low temperature tempering on the microstructure and mechanical properties of Q1100 ultra-high strength steel after pretreatment of normalizing and quenching were studied. The results show that tempered martensite were obtained after normalizing (890 ℃ × 40 min) + quenching (890 ℃ × 30 min) + tempering (185-320 ℃ × 90 min) processes. After tempering at different temperatures, all tested steels have their tensile strength higher than 1 360 MPa, yield strength higher than 1 200 MPa, hardness higher than 400HV3, elongation higher than 13%, and impact energy at -40 ℃ higher than 35.2 J. With the rising of tempering temperature, the tensile strength and hardness gradually decrease, the yield strength first increases and then decreases, the elongation after fracturing increases after an initial slight decrease, and the impact energy at -40 ℃ decreases followed by increase. At a tempering temperature of 230 ℃, the steel in the test has tensile strength of 1 445 MPa, yield strength of 1 238 MPa, hardness of 429HV3, plasticity of 13.8%, and toughness of 47.5 J, which all largely exceed the service standard of Q1100 ultra-high strength steel for construction machinery.

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研究了低温回火对经过正火+淬火处理的Q1100超高强钢显微组织与力学性能的影响。结果表明,经正火(890 ℃ × 40 min)+淬火(890 ℃ × 30 min)+回火(185~320 ℃ × 90 min)处理的实验钢主要获得回火马氏体组织。不同温度回火后,实验钢抗拉强度均大于1 360 MPa、屈服强度均大于1 200 MPa、硬度均大于400HV3、延伸率均大于13%、-40 ℃冲击功均大于35.0 J。随着回火温度升高,实验钢抗拉强度逐渐下降,屈服强度先上升后下降,硬度逐渐降低,断后延伸率先略微下降后逐渐上升,-40 ℃冲击功先下降后上升。回火温度230 ℃时,实验钢抗拉强度(1 445 MPa)、屈服强度(1 238 MPa)、硬度(429HV3)、塑性(13.8%)和-40 ℃冲击韧性(47.5 J)均表现优异,大幅超过Q1100级工程机械用超高强钢的服役标准。

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史术华(1986—),男,重庆奉节人,高级工程师,主要从事超高强钢、管线、桥梁等中厚板品种研究与开发。

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史术华(1986—),男,重庆奉节人,高级工程师,主要从事超高强钢、管线、桥梁等中厚板品种研究与开发。

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史术华(1986—),男,重庆奉节人,高级工程师,主要从事超高强钢、管线、桥梁等中厚板品种研究与开发。

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低温回火对低碳马氏体超高强钢组织及力学性能的影响
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史术华 , 高擎 , 钱亚军
矿冶工程杂志 | 材料 2023,43(6): 174-178
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矿冶工程杂志 | 材料 2023, 43(6): 174-178
低温回火对低碳马氏体超高强钢组织及力学性能的影响
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史术华, 高擎, 钱亚军
作者信息
  • 湘潭钢铁集团有限公司,湖南 湘潭 411101
  • 史术华(1986—),男,重庆奉节人,高级工程师,主要从事超高强钢、管线、桥梁等中厚板品种研究与开发。

Effect of Low-Temperature Tempering on Microstructure and Mechanical Properties of Low-Carbon Martenstic Ultra-High Strength Steel
Shuhua SHI, Qing GAO, Yajun QIAN
Affiliations
  • Xiangtan Iron & Steel Group Co Ltd, Xiangtan 411101, Hunan, China
出版时间: 2023-12-01 doi: 10.3969/j.issn.0253-6099.2023.06.037
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研究了低温回火对经过正火+淬火处理的Q1100超高强钢显微组织与力学性能的影响。结果表明,经正火(890 ℃ × 40 min)+淬火(890 ℃ × 30 min)+回火(185~320 ℃ × 90 min)处理的实验钢主要获得回火马氏体组织。不同温度回火后,实验钢抗拉强度均大于1 360 MPa、屈服强度均大于1 200 MPa、硬度均大于400HV3、延伸率均大于13%、-40 ℃冲击功均大于35.0 J。随着回火温度升高,实验钢抗拉强度逐渐下降,屈服强度先上升后下降,硬度逐渐降低,断后延伸率先略微下降后逐渐上升,-40 ℃冲击功先下降后上升。回火温度230 ℃时,实验钢抗拉强度(1 445 MPa)、屈服强度(1 238 MPa)、硬度(429HV3)、塑性(13.8%)和-40 ℃冲击韧性(47.5 J)均表现优异,大幅超过Q1100级工程机械用超高强钢的服役标准。

回火  /  Q1100  /  超高强钢  /  马氏体  /  强度  /  韧性  /  冲击功

The effects of low temperature tempering on the microstructure and mechanical properties of Q1100 ultra-high strength steel after pretreatment of normalizing and quenching were studied. The results show that tempered martensite were obtained after normalizing (890 ℃ × 40 min) + quenching (890 ℃ × 30 min) + tempering (185-320 ℃ × 90 min) processes. After tempering at different temperatures, all tested steels have their tensile strength higher than 1 360 MPa, yield strength higher than 1 200 MPa, hardness higher than 400HV3, elongation higher than 13%, and impact energy at -40 ℃ higher than 35.2 J. With the rising of tempering temperature, the tensile strength and hardness gradually decrease, the yield strength first increases and then decreases, the elongation after fracturing increases after an initial slight decrease, and the impact energy at -40 ℃ decreases followed by increase. At a tempering temperature of 230 ℃, the steel in the test has tensile strength of 1 445 MPa, yield strength of 1 238 MPa, hardness of 429HV3, plasticity of 13.8%, and toughness of 47.5 J, which all largely exceed the service standard of Q1100 ultra-high strength steel for construction machinery.

tempering  /  Q1100  /  ultra-high strength steel  /  martensite  /  strength  /  toughness  /  impact energy
史术华, 高擎, 钱亚军. 低温回火对低碳马氏体超高强钢组织及力学性能的影响. 矿冶工程杂志, 2023 , 43 (6) : 174 -178 . DOI: 10.3969/j.issn.0253-6099.2023.06.037
Shuhua SHI, Qing GAO, Yajun QIAN. Effect of Low-Temperature Tempering on Microstructure and Mechanical Properties of Low-Carbon Martenstic Ultra-High Strength Steel[J]. Mining and Metallurgical Engineering, 2023 , 43 (6) : 174 -178 . DOI: 10.3969/j.issn.0253-6099.2023.06.037
  • 长株潭国家自主创新示范区专项(2018XK2301)
2023年第43卷第6期
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doi: 10.3969/j.issn.0253-6099.2023.06.037
  • 接收时间:2023-07-25
  • 首发时间:2026-03-05
  • 出版时间:2023-12-01
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  • 收稿日期:2023-07-25
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长株潭国家自主创新示范区专项(2018XK2301)
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    湘潭钢铁集团有限公司,湖南 湘潭 411101
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

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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