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Determination of Continuous Cooling Transformation (CCT) Curve for High Grade Large Diameter Heavy Gauge Pipeline Steel
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Xiao-ming Yuan1, 2, Hui-ping Ren1, Shu-jun Jia3
Science & Technology of Baotou Steel | 2023, 49(5) : 75 - 78
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Science & Technology of Baotou Steel | 2023, 49(5): 75-78
• Variety Quality and Experimental Study •
Determination of Continuous Cooling Transformation (CCT) Curve for High Grade Large Diameter Heavy Gauge Pipeline Steel
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Xiao-ming Yuan1, 2, Hui-ping Ren1, Shu-jun Jia3
Affiliations
  • 1 School of Materials and Metallurgy (School of Rare Earth), Inner Mongolia University of Science and Technology, 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
  • 3 China Iron & Steel Research Institute Group Co., Ltd., Beijing 100094, China
Published: 2023-10-25
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In this paper, the continuous cooling transformation (CCT) curve of X80 pipeline steel researched and developed in laboratory is determined. The determination results showed that the ideal microstructure of X80 pipeline steel could be obtained when cooling rate was 5~30 ℃/s, which was granular bainite + ferrite bainite + a small quantity of martensite/austenite island; the microstructure transformation was basically completed when finish cooling temperature was 450 ℃. The determination of CCT curve could provide references for subsequent optimization of composition design, establishment of process parameters and control of microstructure.

pipeline steel  /  CCT curve  /  heat treatment  /  microstructure
Xiao-ming Yuan, Hui-ping Ren, Shu-jun Jia. Determination of Continuous Cooling Transformation (CCT) Curve for High Grade Large Diameter Heavy Gauge Pipeline Steel[J]. Science & Technology of Baotou Steel, 2023 , 49 (5) : 75 -78 .
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  • Receive Date：2023-08-12
  • Online Date：2025-11-21
  • Published：2023-10-25
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  • Received：2023-08-12
Affiliations
    1 School of Materials and Metallurgy (School of Rare Earth), Inner Mongolia University of Science and Technology, 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
    3 China Iron & Steel Research Institute Group Co., Ltd., Beijing 100094, 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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