LC3低温用铸钢CCT曲线的测定和分析

doi:10.13251/j.issn.0254-6051.2024.12.023

金属热处理 ›› 2024, Vol. 49 ›› Issue (12): 137-141.DOI: 10.13251/j.issn.0254-6051.2024.12.023

LC3低温用铸钢CCT曲线的测定和分析

陈坤^1,2, 宫文国², 常雪婷¹, 尹衍升¹

1.上海海事大学海洋科学与工程学院, 上海 201306;
2.山东燕山精密机械有限公司, 山东济南 271100

收稿日期:2024-06-23 修回日期:2024-10-17 出版日期:2024-12-25 发布日期:2025-02-05
通讯作者: 常雪婷,教授,博士,E-mail:xtchang@shmtu.cn
作者简介:陈坤(1972—),男,高级工程师,博士研究生,主要研究方向为低温用铸钢研发与应用,E-mail:chenkun100@126.com。
基金资助:
国家重点研发计划(2022YFB3705303);上海市科委技术标准项目(21DZ2205700);上海深海材料工程技术中心项目(19DZ2253100)

Determination and analysis of CCT curve of LC3 cryogenic cast steel

Chen Kun^1,2, Gong Wenguo², Chang Xueting¹, Yin Yansheng¹

1. College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China;
2. Shandong Yanshan Precision Machinery Co., Ltd., Jinan Shandong 271100, China

Received:2024-06-23 Revised:2024-10-17 Online:2024-12-25 Published:2025-02-05

摘要/Abstract

摘要： 采用DIL 805A型全自动相变仪测定LC3低温用铸钢在0.05~150 ℃/s不同冷却速度下的膨胀曲线,采用切线法测定相变点Ac₁为700 ℃,Ac₃为849 ℃;结合显微组织分析和显微硬度确定实际转变产物,利用Origin软件绘制CCT曲线图。结果表明,冷却速度在0.05~2 ℃/s时,组织为铁素体+珠光体;在5~20 ℃/s时,组织为铁素体+珠光体+贝氏体;在30~50 ℃/s时,组织为贝氏体+马氏体;在80 ℃/s时,组织为马氏体+残留奥氏体;在100~150 ℃/s时,组织为全马氏体。随着冷却速度的增大,LC3低温用铸钢硬度逐渐提高,硬度由168 HV10增大至453 HV10。马氏体临界冷却速度在80 ℃/s左右。

关键词: LC3低温铸钢, 连续冷却曲线, 切线法, 临界冷却速度

Abstract: DIL 805A type fully automatic phase transformer was used to determine the expansion curve of LC3 cryogenic cast steel under different cooling rates between 0.05-150 ℃/s, and the tangent method was used to determine the phase transformation point Ac₁ of 700 ℃ and Ac₃ of 849 ℃. Combined with microstructure analysis and microhardness to determine the actual transformation products, and the CCT curve was plotted using Origin software. The results show that the microstructure is ferrite + pearlite when the cooling rate is 0.05-2 ℃/s, ferrite + pearlite +bainite when it is 5-20 ℃/s, bainite + martensite when it is 30-50 ℃/s, martensite + retained austenite when it is 80 ℃/s, and martensite when it is 100-150 ℃/s. Hardness of the LC3 cryogenic cast steel gradually increases from 168 HV10 to 453 HV10 with the increasing of cooling rate. Martensite critical cooling rate is about 80 ℃/s.

Key words: LC3 cryogenic cast steel, CCT curve, tangential method, critical cooling rate

中图分类号:

TG141

陈坤, 宫文国, 常雪婷, 尹衍升. LC3低温用铸钢CCT曲线的测定和分析[J]. 金属热处理, 2024, 49(12): 137-141.

Chen Kun, Gong Wenguo, Chang Xueting, Yin Yansheng. Determination and analysis of CCT curve of LC3 cryogenic cast steel[J]. Heat Treatment of Metals, 2024, 49(12): 137-141.

参考文献

[1]王春芳, 路岩, 李继康, 等. 钢的过冷奥氏体转变曲线集[M]. 北京: 冶金工业出版社, 2023: 1-6.
[2]段子良, 张竣明, 周彤. ASTM A352 LC3低温铸钢材料热处理工艺研究[J]. 铸造设备与工艺, 2019(3): 36-38.
Duan Ziliang, Zhang Junming, Zhou Tong. Study on heat treatment process of ASTM A352 LC3 low temperature cast steel[J]. Foundry Equipment and Technology, 2019(3): 36-38.
[3]师昌绪, 李恒德, 周廉. 材料科学与工程手册[M]. 北京: 化学工业出版社, 2004: 184-186.
[4]张世中. 钢的过冷奥氏体转变曲线图集[M]. 北京: 冶金工业出版社, 1993: 18-20.
[5]林慧国, 傅代直. 钢的奥氏体转变曲线: 原理、测试与应用[M]. 北京: 机械工业出版社, 1988.
[6]熊涛, 徐光, 袁清, 等. 含镍低温压力容器钢的静态CCT曲线研究[J]. 热加工工艺, 2022, 51(4): 42-45.
Xiong Tao, Xu Guang, Yuan Qing, et al. Study on static CCT curve of Ni-containing low temperature pressure vessel steel[J]. Hot Working Technology, 2022, 51(4): 42-45.
[7]王彩焕. 低温用08Ni3DR钢热处理后的组织与力学性能[J]. 金属热处理, 2013, 38(12): 27-29.
Wang Caihuan. Microstructure and mechanical properties of 08Ni3DR cryogenic steel after heat treatment[J]. Heat Treatment of Metals, 2013, 38(12): 27-29.
[8]蒋辉, 赵爱民, 裴伟, 等. 低合金耐磨钢的CCT曲线与马氏体相变原位观察[J]. 材料热处理学报, 2022, 43(11): 143-150.
Jiang Hui, Zhao Aimin, Pei Wei, et al. Continuous cooling transformation curve of low alloy wear-resistant steel and in-situ observation of its martensitic transformation[J]. Transactions of Materials and Heat Treatment, 2022, 43(11): 143-150.
[9]王旭, 魏军, 仇圣桃. 12Mn 钢 CCT 曲线的测定与分析[J]. 热加工工艺, 2021, 50(4) : 147-150.
Wang Xu, Wei Jun, Qiu Shengtao. Measurement and analysis of CCT curve of 12Mn steel[J]. Hot Working Technology, 2021, 50(4): 147-150.
[10]李红英, 王法云, 曾翠婷, 等. 3Cr2Mo钢CCT 曲线的测定与分析[J]. 中南大学学报(自然科学版), 2011, 42(7): 1928-1933.
Li Hongying, Wang Fayun, Zeng Cuiting, et al. Determination and analysis of CCT curves of 3Cr2Mo steel[J]. Journal of Central South University (Science and Technology), 2011, 42(7): 1928-1933.
[11]高备军, 李志杰, 于大威, 等. 稀土在耐低温铁路车辆铸钢件上的应用[J]. 铸造工程, 2023, 47(S1): 36-38.
Gao Beijun, Li Zhijie, Yu Dawei, et al. Application of RE in low temperature resistant steel castings for railway vehicles[J]. Foundry Engineering, 2023, 47(S1): 36-38.
[12]李廷忠, 罗吉荣, 万里. 两种脱氧剂对铸钢件夹杂物和低温冲击性能的影响[J]. 铸造, 2009, 58(2): 144-147.
Li Tingzhong, Luo Jirong, Wan Li. Influence of two deoxidizers on inclusions and low temperature impacting property of steel castings[J]. Foundry, 2009, 58(2): 144-147.
[13]Trzaska J, Dobrzanski L A. Modelling of CCT diagrams for engineering and constructional steels[J]. Journal of Materials Processing Technology, 2007(192/193): 504-510.
[14]王刚. 铸钢件淬火过程温度场数值模拟及组织性能预测[D]. 武汉: 华中科技大学, 2014.

LC3低温用铸钢CCT曲线的测定和分析

Determination and analysis of CCT curve of LC3 cryogenic cast steel

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