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Research and Development of Cold Rolled 980 MPa Martensitic Steel Product
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Yuan-yuan Yang1, Xiu-fei Zhang2, Li Huang1, Ye Liu2
Science & Technology of Baotou Steel | 2022, 48(6) : 33 - 36
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Science & Technology of Baotou Steel | 2022, 48(6): 33-36
• Quality of Variety and Experiment and Research •
Research and Development of Cold Rolled 980 MPa Martensitic Steel Product
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Yuan-yuan Yang1, Xiu-fei Zhang2, Li Huang1, Ye Liu2
Affiliations
  • 1 Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
  • 2 Rare Earth Steel Plate Plant of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
Published: 2022-12-25
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In this paper, the chemical composition and production process are designed according to the technical requirements of cold rolled 980 MPa martensitic steel as well as the study of its annealing process in laboratory is carried out with pilot-scale test platform. The study results showed that the yield strength was 750~940 MPa, tensile strength reached over 1 020 MPa and elongation was over 10% for the products of cold rolled 980 MPa martensitic steel produced with the same chemical composition and rolling process through adjusting the slow cooling temperature of annealing, which could meet technical requirements. The effect laws of slow cooling temperature on microstructure and properties of cold rolled 980 MPa martensitic steel are clear and definite as well as the soaking temperature is determined to be 800 ℃,slow cooling rate is determined to be 3 ℃/s, rapid cooling rate is determined to be 45 ℃/s and the optimum slow cooling temperature is determined to be 680 ℃ when rapid cooling temperature is 280 ℃ with the composition system combining with the microstructure and mechanical properties of finished products.

automobile steel  /  martensite  /  cold rolling  /  tensile strength  /  microstructure
Yuan-yuan Yang, Xiu-fei Zhang, Li Huang, Ye Liu. Research and Development of Cold Rolled 980 MPa Martensitic Steel Product[J]. Science & Technology of Baotou Steel, 2022 , 48 (6) : 33 -36 .
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Year 2022 volume 48 Issue 6
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Article Info
  • Receive Date：2022-10-13
  • Online Date：2025-11-24
  • Published：2022-12-25
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  • Received：2022-10-13
Affiliations
    1 Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
    2 Rare Earth Steel Plate Plant 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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