锻压技术

2205双相不锈钢锻造失效分析

英文标题：Forging failure analysis on duplex stainless steel 2205

单位：兰州兰石能源装备工程研究院有限公司甘肃省高端铸锻件工程技术研究中心兰州兰石铸锻有限责任公司兰州兰石检测技术有限公司

分类号：TG316.2

出版年,卷(期):页码：2017,42(8):6-11

摘要：

针对2205双相不锈钢在实际工业化生产中出现的锻造失效问题进行了研究。采用10 t EAF-AOD双联工艺冶炼2205双相不锈钢，浇注2支4.2 t钢锭。钢锭化学成分合格，表面质量良好，但在锻造开坯过程中，钢锭表面出现大量横向裂纹，导致锻件产品报废。利用金相显微镜、扫描电镜以及能谱分析仪等，对2205双相不锈钢在锻造过程中出现的裂纹缺陷进行金相组织、截面形貌及能谱分析。结果表明：2205双相不锈钢锻造失效主要原因是，锻前加热过程中，在850 ℃进行了时效处理，析出大量σ脆性相，导致钢的塑韧性急剧下降，受到变形力作用后表面严重开裂；热加工过程中，2205双相不锈钢在600~1000 ℃温度范围内应快速升温，不宜做时效处理，避免σ相析出，恶化钢的力学性能。

The forging failure problem of duplex stainless steel 2205 in actual industrial production was studied. Then, two 4.2 tons steel ingots were poured by 10 t EAF-AOD duplex smelting process, and the chemical composition of ingot was qualified and the surface quality was good. But in the process of forging billet, the ingot surface appeared a lot of lateral cracks resulting in forging products scrapped. Therefore, the defects of duplex stainless steel 2205 during the forging process were studied by means of metallographic microscope, scanning electron microscope and energy dispersive spectrometer. The results show that the reason of forging failure of duplex stainless steel 2205 was that the aging treatment was conducted at 850 ℃ during the heating process before forging, and a large amount of σ brittle phase were precipitated to result in the decrease of plastic toughness of steel and severe cracking of surface by deformation force. Furthermore, duplex stainless steel 2205 should be heated rapidly during the temperature range 600-1000 ℃ in hot working process，and the aging treatment should not be conducted to avoid the σ-phase precipitation worsening the mechanical properties of steel.

基金项目：

甘肃省科技计划资助项目（2015GS05896）

张潇潇（1990-），男，硕士，工程师

参考文献：

［1］武英杰，申鹏，颜海涛. 双相不锈钢的国内外研究进展[J].科技创新导报,2010，(28):41-41.Wu Y J, Shen P, Yan H T. Research progress of duplex stainless steel at home and abroad[J].Science and Technology Innovation Herald, 2010，(28):41-41.
［2］康利梅. 双相不锈钢的发展及应用综述[J].科技广场,2010，(8):165-168.Kang L M. Review of development and application of duplex stainless steel[J]. Science Mosaic, 2010，(8):165-168.
［3］张继祥，高波，秦海涛，等. 2205双相不锈钢中温塑性变形行为及本构方程[J].塑性工程学报, 2013, 20(6):77-82.Zhang J X，Gao B，Qin H T，et al. Study of warm plastic flow stress and constitutive model of 2205 duplex stainless steel [J]. Journal of Plasticity Engineering, 2013, 20 (6):77-82.
［4］李少峰，任学平，李殊霞，等.初始应变速率对00Cr22Ni5 Mo3N双相不锈钢超塑性的影响[J].锻压技术，2013，38(5):158-161.Li S F，Ren X P，Li S X，et al. Effect of initial strain rate on superplasticity of 00Cr22Ni5Mo3N duplex stainless steel [J].Forging & Stamping Technology, 2013, 38(5)：158-161.
［5］Charles J，Chemelle P，胡锦程，等. 双相不锈钢的发展现状及未来市场趋势[J].世界钢铁,2012, 11(1):50-61.Charles J，Chemelle P，Hu J C, et al. The history of duplex developments，nowadays DSS properties and duplex market future trends[J]. World Iron & Steel, 2012, 11(1):50-61.
［6］宋红梅，江来珠，余敏，等. 双相不锈钢 2205 的热加工性能研究[J].钢铁研究学报,2010, 22(2):41-45.Song H M, Jiang L Z, Yu M，et al. Hot workability of 2205 duplex stainless steel [J]. Journal of Iron and Steel Research, 2010, 22(2):41-45.
［7］刘复兴. S32205双相不锈钢中σ相的析出及其对力学性能的影响[J].钢铁,2010, 45(7):62-65.Liu F X. σ phase precipitation and its effect on mechanical properties of S32205 duplex stainless steel [J]. Iron & Steel, 2010, 45(7):62-65.
［8］王永强. σ相析出对不锈钢力学性能的影响概述[J].钢铁研究学报,2016, 28(2):1-8.Wang Y Q. Overview of σ phase influencing on mechanical properties of stainless steels [J]. Journal of Iron and Steel Research, 2016, 28(2):1-8.
［9］王国华.σ相的析出对双相不锈钢组织性能的影响[J].中国冶金,2011, 21(6):15-18.Wang G H. Influence of the sigma phase precipitation on the microstructure and properties in duplex stainless steel [J].China Metallurgy, 2011, 21(6):15-18.
［10］刘雄，何燕霖，丁秀平，等.高温时效对 2205双相不锈钢中σ相析出行为的影响[J].材料热处理学报,2010,31(3):48-51.Liu X, He Y L, Ding X P，et al. Effect of high temperature aging on σ-phase precipitation in a 2205 duplex stainless steel [J]. Transactions of Materials and Heat Treatment, 2010, 31(3):48-51.
［11］张爱梅. 非金属夹杂物对钢性能的影响[J].物理测试, 2006, 24(4):42-44.Zhang A M. Effect of non-metallic inclusion on property of steel [J]. Physics Examination and Testing, 2006, 24(4):42-44.
［12］李正邦. 超洁净钢和零非金属夹杂钢[J].特殊钢,2004, 25(4):24-27.Li Z B. Super clean steels and zero non-metallic inclusion steels [J].Special Steel, 2004, 25(4):24-27.
［13］王月香，程逸明，刘振宇，等. 2205双相不锈钢中σ相的析出规律[J].钢铁研究学报,2009,21(10):51-54.Wang Y X, Cheng Y M, Liu Z Y，et al. Precipitation behavior of σ-phase in 2205 dual phase stainless steel [J]. Journal of Iron and Steel Research, 2009, 21(10):51-54.
［14］王院生，李海丰，王均，等. 时效对2205双相不锈钢σ析出相的影响[J].材料热处理技术，2011, 40(8):172-174.Wang Y S, Li H F, Wang J, et al. Effects of aging on σ-phase precipitation of 2205 duplex stainless steel[J]. Material & Heat Treatment, 2011, 40(8):172-174.
［15］NB/T 47013.3—2015，承压设备无损检测第3部分：超声检测[S].NB/T 47013.3—2015，Nondestruction testing of pressure equipments—Part 3:Ultrasonic testing [S].

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