锻压技术

深冷处理对304L奥氏体不锈钢低温冲击性能的影响

英文标题：Influence of cryogenic treatment on low-temperature impact performance for 304L austenitic stainless steel

作者：任培东许瑛

单位：1.酒钢集团宏兴钢铁股份公司钢铁研究院 2.酒钢集团宏兴钢铁股份公司不锈钢分公司

分类号：TG161

出版年,卷(期):页码：2020,45(11):67-72

摘要：

对工业生产的厚度为40 mm的304L奥氏体不锈钢中厚板进行1、3、5、7、9次深冷循环处理，分析比较多次循环深冷处理对304L奥氏体不锈钢组织、性能的影响。结果表明：在深冷过程中，材料急剧降温产生的温度应力和体积变化会导致一定量的形变诱导马氏体相变，同时材料局部存在马氏体转变起始温度较高的区域，在降温过程中也会发生马氏体相变。因此，室温冲击吸收的能量随深冷次数的增加呈现先略微下降、然后稳定上升的趋势；在-196 ℃低温冲击时，吸收的能量基本呈稳定上升趋势。经过3~5次的循环深冷处理，这种微量的马氏体相变组织会趋于稳定和细化，孪晶亚结构明显细化。多次深冷处理时，形变孪晶的形核需要很大动力，但长大过程却不需要大的动力，因此，局部区域混晶严重。

The cryogenic treatment with one, three, five, seven and nine cycles of 304L austenitic stainless steel plate with the thickness of 40 mm in industry production were conducted respectively, and the influences of cryogenic treatment with many cycles on the microstructure and properties of 304L austenitic stainless steel were analyzed and compared. The results show that the temperature stress and volume change caused by the rapid cooling of material during the cryogenic process lead to a certain amount of deformation to induce martensite transformation, meanwhile, there exists a region where the initial temperature of martensitic transformation is high locally in the material, and the martensite transformation also occurs during the cooling process. As a result, the energy absorbed by the impact at room temperature decreases slightly with the increasing of the number of cryogenic cycles, and then increases steadily, and the energy absorbed by the low-temperature impact at -196 ℃ shows a stable upward trend. However, after three to five cycles of cryogenic treatment, the trace of martensite transformation structure tends to stabilize and refine, and the twin crystal substructure is obviously refined. Thus, during the cryogenic treatment with many cycles, the nucleation of deformation twin crystal requires a lot of power, but it does not require a lot of power during the growth process, so the mixed crystal is serious in local areas.

基金项目：

任培东（1972-），男，硕士，正高级工程师 E-mail：renpeidong@jiugang.com

参考文献：

[1]陆世英. 不锈钢概论[M]. 北京: 化学工业出版社, 2013.

Lu S Y. Introduction of Stainless Steel[M]. Beijing: Chemical Industry Press, 2013.

[2]严彪,安建军,陈兴,等.不锈钢手册[M].北京：化学工业出版社,2009.

Yan B,An J J,Chen X,et al.Stainless Steel Handbook[M]. Beijing: Chemical Industry Press, 2009.

[3]肖纪美.不锈钢的金属学问题[M].北京：冶金工业出版社,2006.

Xiao J M. Metal Problems of Stainless Steel[M]. Beijing: Metallurgical Industry Press,2006.

[4]张述林,李敏娇,王晓波,等.18-8奥氏体不锈钢的晶间腐蚀[J].中国腐蚀与防护学报, 2007, 27(2): 124-127.

Zhang S L, Li M J, Wang X B, et al. Intergranular corrosion of 18-8 austenitic stainless steel[J]. Journal of Chinese Society for Corrosion and Protection, 2007, 27(2): 124-127.

[5]吴红艳,艾峥嵘,刘相华.钢铁材料深冷处理技术研究和应用进展[J].材料热处理学报,2013,34(12):1-6.

Wu H Y, Ai Z R, Liu X H. Progress of research and application on cryogenic treatment of steels[J]. Transactions of Materials and Treatment,2013,34(12):1-6.

[6]吴志伟,杨卯生,梁剑雄,等.钢铁材料的冷处理[J].金属热处理,2017,42(10):116-123.

Wu Z W, Yang M S, Liang J X, et al. Cryogenic treatment of steel materials[J]. Heat Treatment of Metals,2017,42(10):116-123.

[7]邓黎辉,汪宏斌,李绍宏,等.高强韧冷作模具钢深冷处理性能及组织[J].材料热处理学报,2011,32(4):76-81.

Deng L H, Wang H B, Li S H, et al. Microstructure and properties of a high strength tool steel after cryogenic treatment[J]. Transactions of Materials and Treatment,2011,32(4):76-81.

[8]陈鼎,肖廷,蒋琼,等.深冷处理对钢铁材料耐磨性的影响[J].矿冶工程,2010,30(2):107-111.

Chen D, Xiao T, Jiang Q, et al. Effects of cryogenic treatment on wear resistance of ferrous materials[J]. Mining and Metallugical Engineering,2010,30(2):107-111.

[9]陈晓.奥氏体不锈钢深冷应变强化关键技术研究[D].上海：华东理工大学,2014.

Chen X. Study of Technology of Cryogenic Stretch Forming on Austenitic Stainless Steel[D]. Shanghai：East China University of Science and Technology,2014.

[10]周巍巍.低温阀门用奥氏体不锈钢深冷处理工艺研究[D].兰州：兰州理工大学,2016.

Zhou W W. Research on Austenitic Stainless Steel′s Low-temperture Treatment Technology of Cryogenic Valve[D]. Lanzhou：Lanzhou University of Technology,2016.

[11]秦尚武,党淑娥,马玉霞,等.过(深)冷处理对30Cr1Mo1V奥氏体形核及长大行为的影响[J].材料热处理学报,2017,38(6):123-128.

Qin S W, Dang S E, Ma Y X, et al. Effect of cryogenic treatment on nucleation and growthbehavior of austenite grain of 30Cr1Mo1V steel[J]. Transactions of Materials and Treatment,2017,38(6):123-128.

[12]朱和军,施琴,李长生.深冷处理对310S不锈钢酸腐蚀磨损性能的影响[J].铸造技术,2018,39(6):1341-1345.

Zhu H J, Shi Q, Li C S. Effect of cryogenic treatment on acid corrosion wear resistance property of 310S stainless steel[J]. Foundry Technology,2018，39(6):1341-1345.

[13]GB/T 2975—2018,钢及钢产品力学性能试验取样位置及试样制备[S].

GB/T 2975—2018,Steel and steel products—Location and preparation of sample and test pieces for mechanical testing[S].

[14]Tyschenko A I, Theisen W, Oppenkowski A, et al. Low-temperature martensitic transformation and deep cryogenic treatment of a tool steel[J]. Materials Science and Engineer: A, 2010,527(26):7027-7039.

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