|
|
Effect of casting speed on size and distribution of carbide in 30Cr13 continuous casting slab |
ZHANG Jing1, ZHAO Xuan1, LI Shi2,3, ZHANG Lifeng4 |
1. School of Vehicle and Energy, Yanshan University, Qinhuangdao 066400, Hebei, China; 2. School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China; 3. Stainless Steel Technical Center, Central Research and Development Institute, Baoshan Iron and Steel Co., Ltd., Shanghai 201999, China; 4. School of Mechanical and Material Engineering, North China University of Technology, Beijing 100144, China |
|
|
Abstract 30Cr13 is a high quality stainless steel for cutting tools. The development of continuous casting technology has greatly improved its production efficiency. Casting speed is an important process parameter and technical indicator in the continuous casting process. When the casting speed is not suitable,it is easy to form a large amount of unevenly distributed carbides,and the size and distribution of carbides are key factors affecting the quality of continuous casting slabs. Taking 30Cr13 continuous casting slab as the research object,the morphology,size,and type of carbides in different solidification structures in continuous casting slabs of 0.75 m/min,0.80 m/min,and 0.85 m/min were analyzed by Scanning electron microscope,Light microscopy,X-ray diffraction. The effect of casting speed on carbides in 30Cr13 continuous casting slab was studied based on the solidification microstructure morphology,and the effect law of casting speed on carbides in continuous casting slab was summarized. The results show that the main morphology of carbides is clusters,blocks,and strips,and the main components are Fe,Cr,and C. The main types of carbides have been determined to be (Fe,Cr)7C3 and (Fe,Cr)23C6. And it was found that there were no carbides present at the "white bright band",and a large amount of carbides appeared in the sample between the "white bright bands",with the most carbides appearing at the center of the slab. The casting speed has no effect on the shape,type,and location of carbides,but has a greater impact on the quantity and size of carbides. As the casting speed increases,the proportion of total carbide area and number density first decrease and then increase. When the casting speed is 0.80 m/min,the proportion of carbide area and number density in the continuous casting slab is the lowest. This change is consistent with the trend of the degree of deviation of the C segregation index from the normal value under different casting speeds. With the increase of casting speed,the proportion of small-sized carbides increases gradually,while that of large-sized carbides are almost zero. The speed of 0.80 m/min can effectively control the size distribution of carbides in continuous casting slab and improve the quality of the slab.
|
Received: 07 June 2023
|
|
|
|
[1] JIN Y F,ZHANG T,ZANG Q Y,et al. Behavior of Nb influence on structure and properties of 30Cr13 cast martensitic stainless steel[J]. Journal of Iron and Steel Research International,2019,26(5):462. [2] 乔晓燕,赖承班,陈卓,等. 奥氏体化工艺对30Cr13钢淬火后的组织和硬度的影响[J]. 上海金属,2021,43(5):33. (QIAO X Y,LAI C B,CHEN Z,et al. Effect of austenitizing process on microstructure and hardness of 30Cr13 steel after quenching[J]. Shanghai Metals,2021,43(5):33.) [3] 金洋帆,臧其玉,张拓,等. Cr13系铸造马氏体不锈钢铌和碳的合理配比关系[J]. 钢铁,2019,54(3):87.(JIN Y F,ZANG Q Y,ZHANG T,et al. Reasonable proportioning relationship between Nb and C of Cr13 series casting martensitic stainless steel[J]. Iron and Steel,2019,54(3):87.) [4] 曾建华,张敏,吴国荣,等. 30Cr13不锈钢冶炼过程夹杂物控制技术[J]. 钢铁,2019,54(8):43. (ZENG J H,ZHANG M,WU G R,et al. Inclusions control technology in smelting process of 30Cr13 stainless steel[J]. Iron and Steel,2019,54(8):43.) [5] 白海旺,张永亮. 连铸工艺对马氏体不锈钢刀具水波纹缺陷的影响研究[J]. 连铸,2018(5):33. (BAI H W,ZHANG Y L. Effect of continuous casting process on water ripple defect of martensitic stainless steel cutlery[J]. Continuous Casting,2018(5):33.) [6] MA S Q,XING J DJ,HE Y L,et al. Microstructure and crystallography of M7C3 carbide in chromium cast iron[J]. Materials Chemistry and Physics,2015,161:65. [7] 于涛,井玉安,张亚樵,等. 不锈钢复合板界面组织形貌[J]. 钢铁,2018,53(11):63. (YU T,JING Y A,ZHANG Y Q,et al. Interfacial microstructure morphologies of stainless steel clad plate[J]. Iron and Steel,2018,53(11):63.) [8] 陈亮,宋波,陈天明,等. 45钢连铸大方坯中心疏松与缩孔控制[J]. 钢铁,2018,53(8):49. (CHEN L,SONG B,CHEN T M,et al. Control countermeasures of center porosity and shrinkage in 45 steel continuous casting bloom[J]. Iron and Steel,2018,53(8):49.) [9] 张小伟,白晓路,石磊,等. SWRH72B-S绞线钢连铸小方坯凝固温度场数值模拟[J]. 连铸,2023(1):18. (ZHANG X W,BAI X L,SHI L,et al. Numerical simulation of solidification temperature field of SWRH72B-S wire steel continuous casting billet[J]. Continuous Casting,2023(1):18.) [10] DU N Y,LIU H H,CAO Y F,et al. Formation mechanism of MC and M2C primary carbides in as-cast M50 bearing steel[J]. Materials Characterization,2021,174:111011. [11] 罗腾飞,王卫领,刘宗辉,等. GCr15轴承钢连铸冷却速率下凝固原位观察[J]. 钢铁,2022,57(2):73. (LUO T F,WANG W L,LIU Z H,et al. In-situ observation on solidification of GCr15 bearing steel at cooling rates of continuous casting[J]. Iron and Steel,2022,57(2):73.) [12] 金洋帆,毛宏焕,齐兴,等. 淬火介质对30Cr13不锈钢显微组织和性能的影响[J]. 热处理,2017,32(1):30.(JIN Y F,MAO H H,QI X,et al. Effect of quenching media on microstructure of 30Cr13 stainless steel[J]. Heat Treatment,2017,32(1):30.) [13] 王利伟,龚志华,杨钢,等. 热处理工艺对2Cr12 NiMo1 W1V叶片钢组织和性能的影响[J]. 钢铁,2020,55(7):100.(WANG L W,GONG Z H,YANG G,et al. Effect of heat treatment process on microstructure and property of 2Cr12 NiMo1 W1V steel for steam blade[J]. Iron and Steel,2020,55(7):100.) [14] JIANG D Q,WANG R,ZHANG Q,et al. Effect of final electromagnetic stirring on solidification microstructure of GCr15 bearing steel in simulated continuous casting[J]. Journal of Iron and Steel Research International,2020,27(2):141. [15] 冯明杰,王恩刚,战国锋,等. W9高速钢的电磁连续铸造研究[J]. 钢铁,2008,43(10):25. (FENG M J,WANG E G,ZHAN G F,et al. Study on electromagnetic continuous casting of W9 high speed steel[J]. Iron and Steel,2008,43(10):25.) [16] LIU J C,LI W M,FU L. Effect of cooling rates on the characteristics of carbides during solidification of D2 cold-work die steel (Clean title paper)[J]. Steel Research International,2022,93:2200137. [17] YUAN X X,LUO S,WANG W L,et al. Experimental investigation on solidification structure and carbides in continuously cast slab of high manganese steel Mn13[J]. Metallurgical and Materials Transactions B,2022,53(5):3170. [18] LIU S,ZHOU Y F,XING X L,et al. Agglomeration model of (Fe,Cr)7C3 carbide in hypereutectic Fe-Cr-C alloy[J]. Materials Letters,2016,183:272. [19] 姚健, 满廷慧, 刘宇, 等. 连铸对M2高速钢偏析与碳化物的影响[J]. 中国冶金, 2023, 33(3): 77.(YAO J, MAN T H, LIU Y, et al. Effect of continuous casting on segregation and carbide of M2 high speed steel[J]. China Metallurgy, 2023, 33(3): 77.) [20] 徐斌,李鸿亮,王雪林,等. 30Cr13马氏体不锈钢连铸坯的实验研究[J]. 甘肃冶金,2021,43(2):53. (XU B,LI H L,WANG X L,et al. Experimental study on slab of 30Cr13 martensitic stainless steel[J]. Gansu Metallurgy,2021,43(2):53.) [21] 左小坦,陈永峰,张洪彪,等. 连铸工艺参数对40Cr圆坯碳偏析的影响[J]. 中国冶金,2020,30(6):97. (ZUO X T,CHEN Y F,ZHANG H B,et al. Effect of CC process parameters on carbon segregation of 40Cr round billet[J]. China Metallurgy,2020,30(6):97.) [22] 刘添,李曜光,孙彦辉,等. 82B小方坯凝固组织和偏析预测模型开发及应用[J]. 连铸,2022(6):8. (LIU T,LI Y G,SUN Y H,et al. Development and application of prediction model for solidification structure and segregation of 82B billet[J]. Continuous Casting,2022(6):8.) [23] JIN Y F,YANG Y T. Behaviour mechanism of carbide in quenching and tempering process of Nb-bearing martensitic stainless steel[J]. International Journal of Cast Metals Research,2020,33(1):24. [24] HAN F F,JIANG L,YE X X,et al. Carbides evolution in a Ni-16Mo-7Cr base superalloy during long-term thermal exposure[J]. Materials,2017,10(5):1. [25] DU G,LI J,WANG Z B. Control of carbide precipitation during electroslag remelting-continuous rapid solidification of GCr15 steel[J]. Metallurgical and Materials Transactions B,2017,48(6):2873. [26] SHI C B,ZHU Q T,YU W T,et al. Effect of oxide inclusions modification during electroslag remelting on primary carbides and toughness of a high-carbon 17 mass% Cr tool steel[J]. Journal of Materials Engineering and Performance,2016,25(11):4785. [27] SABZI M,FAR S M,DEZFULI S M. Effect of melting temperature on microstructural evolutions,behavior and corrosion morphology of Hadfield austenitic manganese steel in the casting process[J]. International Journal of Minerals,Metallurgy and Materials,2018,25(12):1431. [28] 曹方,杨卯生,杨树峰,等. 高氮不锈轴承钢碳化物分布与高温断裂机制[J]. 钢铁,2022,57(6):132. (CAO F,YANG N S,YANG S F,et al. Carbide distribution and high-temperature fracture mechanism of high nitrogen stainless bearing steel[J]. Iron and Steel,2022,57(6):132.) [29] GENG B Y,LI Y K,ZHOU R F,et al. Formation mechanism of stacking faults and its effect on hardness in M7C3 carbides[J]. Materials Characterization,2020,170:110691. [30] 韩荣,刘洪喜,尉文超,等. Ti-V-Mo微合金化22MnB5钢中析出相及其强化作用[J]. 钢铁,2022,57(2):127. (HAN R,LIU H X,YU W C,et al. Precipitates and their strengthening in Ti-V-Mo microalloyed 22MnB5 steel[J]. Iron and Steel,2022,57(2):127) [31] 刘博,窦坤,杨振国,等. GCr15轴承钢大方坯宏观碳偏析形成机理及二次冷却调控机制研究[J]. 连铸,2015(5):7. (LIU B,DOU K,YANG Z G,et al. Research on carbon macro-segregation mechanism and secondary cooling control for bloom of GCr15 bearing steel[J]. Continuous Casting,2015,40(5):7.) [32] 赖朝彬,辛博,陈伟庆,等. 连铸板坯二次枝晶臂间距对中心碳偏析的影响[J]. 炼钢,2009,25(4):42. (LAI C B,XIN B,CEHN W Q,et al. Effect of secondary dendritic arm spacing on center carbon segregation of slab [J]. Steelmaking,2009,25(4):42.) |
[1] |
LIU Haining, CHEN Yangmin, CHEN Xiangru, LI Lijuan, ZHAI Qijie. Effect of PMO on dendritic structure and carbide of high-speed steel[J]. Iron and Steel, 2024, 59(2): 119-128. |
[2] |
YANG Honglüe, XIAO Zhixia, FENG Jianhang, CHEN Jiaqi, CHEN Xingfu, LIU Jiebing, SHI Liyong. Effect of inoculation treatment and holding time on microstructure and mechanism of high nickel-chromium cast iron[J]. Iron and Steel, 2024, 59(1): 139-147. |
[3] |
LI Yu1,SUN Yanhui1,SONG Sicheng1,WANG Chao2. Effect of submerged entry nozzle on molten steel flow in thin slab mold[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2024, 36(1): 66-75. |
[4] |
ZHANG Hanchi,WANG Yingchun,QIU Xuyangfan,XIONG Zhiping,CHENG Xingwang. Effect of thermomechanical controlled processing deformation on microstructures and tensile properties of Fe-25Mn-8Al-5Ni-1.2C steel[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2024, 36(1): 121-128. |
[5] |
CAO Longqiong, XIA Jinkui, JIN Haibing, YAN Min, WANG Zixian, ZHANG Liqiang. Control practices for edge cracking after rolling of 300 mm thick wide-section plain plates[J]. CONTINUOUS CASTING, 2024, 43(1): 55-61. |
[6] |
SONG Guangjie, ZHU Haoran, JI Dengping, LIU Bin, FU Jianxun. Analysis of inclusions and carbides in 102Cr17Mo bearing steel billet[J]. Iron and Steel, 2023, 58(8): 157-168. |
|
|
|
|