ISSN:1003-8620
CN:42-1243/TF
Governed by: CITIC Pacific Special Steel Group Co., LTD
Sponsored by: Daye Special Steel Co., LTD.
Special Steel ›› 2013, Vol. 34 ›› Issue (2): 62-64.
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Shu Wei, Lian Xiaojie, Zhang Shoulu, Li Jianchun, Luo Gang
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舒玮,廉晓洁,张寿禄,李建春,罗刚
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Abstract: The effect of solid solution treatment at 1000-1200 °C for 1-3 h, quenching or air cooling on δ- ferrite transformation in 200 mm x 1 250 mm casting slab of ultra-low carbon austenite stainless steel 00Cr24Ni13 (/% : ≤ 0.02C, 23-25Cr, 13-14Ni) has been studied. Results show that with increasing solid solution temperature and extending holding time the amount of 8- ferrite in slab decreases ; with increasing solid solution temperature the network of δ-ferrite in casting slab is broken and coarsened ; air cooling promotes the grown 8-ferrite at higher temperature transforming to smaller granular structure, and as casting slab sample solid solution treats at 1 200 ℃ for 3 h and cools in air the network 8-ferrite in slab sample completely transforms to dispersed less than 10 μm granular ferrite structure and the 8-ferrite phase proportion also decreases from 14.3% to 7.3%. Relative to granular ferrite the two phase interface of austenite and ferrite for network δ-ferrite structure is easily to form crack during rolling.
摘要: 研究了1000~1200℃ 1~3 h固溶、淬火或空冷对超低碳奥氏体不锈钢00Cr24Ni13(/%:≤0.02C、23~25Cr、13~14 Ni)200 mm×1 250 mm铸坯8铁素体转变的影响。结果表明,随固溶温度升高和保温时间延长铸坯中δ铁素体量减少;随固溶温度的升高,铸坯中的连续网状δ铁素体断开并且长大,空冷则会促使高温下长大的δ铁素体向小尺寸颗粒状组织转变;当铸坯试样在1 200℃保温3 h空冷后,网状δ铁素体完全转变成弥散分布的小于10μm的颗粒状铁素体组织,δ铁素体相比例也由14.3%降至7.3%。相对于颗粒状铁素体,网状δ铁素体的奥氏体-铁素体两相界面在轧制中更容易产生裂纹。
关键词: 奥氏体不锈钢00Cr24Ni13, 固溶处理, δ铁素体转变
Shu Wei, Lian Xiaojie, Zhang Shoulu, Li Jianchun, Luo Gang. Effect of Solid Solution Treatment on δ-Ferrite Transformation in Casting Slab of Ultra-Low Carbon Austenite Stainless Steel 00Cr24Ni13[J]. Special Steel, 2013, 34(2): 62-64.
舒玮, 廉晓洁, 张寿禄, 李建春, 罗刚. 固溶处理对超低碳奥氏体不锈钢00Cr24Ni13铸坯δ-铁素体转变的影响[J]. 特殊钢, 2013, 34(2): 62-64.
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https://www.specialsteeljournal.com/EN/Y2013/V34/I2/62