Optimization of of main machining parameters for ultrasonic rolling of iron-based laser cladding layer
-
摘要: 为了对铁基激光熔覆层实现更优光整强化效果，采用超声滚压方法处理EA4T铁基激光熔覆层并对其主加工参数优化进行分析。研究结果表明：提高压下量后，激光熔覆层表面粗糙度增大；提高静压力后，熔覆层表面硬度先提高再降低；提高滚压速率后，试样表面粗糙度呈现先降低再增大变化；增加滚压次数后，获得的熔覆层表面硬度呈现先增大再降低的变化。确定最优参数工艺：在滚压压下量为0.10 mm、滚压速率为2 100 mm/min、静压力介于0.45～0.65 MPa、滚压3次条件下，采用超声滚压方法处理激光熔覆层能够实现优异表面光整效果。超声滚压后激光熔覆层表层部位存在明显塑性变形层，激光熔覆层塑性变形程度随深度增加而降低，晶粒尺寸则增大。文章研究结果为激光熔覆热作车轴钢提供超声滚压工艺优化的理论参考，并为实际应用过程提供理论指导，此外也可以促进模具制造技术和修复能力的提升。Abstract: In order to achieve better finishing and strengthening effect on laser cladding layer of axle steel, ultrasonic rolling method was used to treat laser cladding layer of EA4T axle steel and its main machining parameters optimization was analyzed. The results show that the surface roughness of laser cladding increases with the increase of the reduction amount. With the increase of static pressure, the surface hardness of cladding layer firstly increases and then decreases. When the rolling rate is increased, the surface roughness of the sample decreases first and then increases. With the increase of rolling times, the surface hardness of the cladding layer increases first and then decreases. The optimal parameters were determined as follows: under the conditions of rolling down 0.10 mm, rolling rate 2100 mm/min, static pressure between 0.45~0.65 MPa and rolling three times, the ultrasonic rolling method could achieve excellent surface finishing effect. There are obvious plastic deformation layers on the surface of laser cladding layer after ultrasonic rolling. The plastic deformation degree of laser cladding layer decreases with increasing depth, while the grain size increases. According to the research results of this paper, it can provide a theoretical reference for the optimization of ultrasonic rolling process of laser cladding hot working axle steel, and provide theoretical guidance for the practical application process. In addition, it can also promote the improvement of die manufacturing technology and repair ability.
-
Key words:
- ultrasonic rolling /
- laser cladding /
- axle steel /
- parameter optimization
-
[1] 高阿亮,何玉林,党菁,等. 异质板材无铆钉滚压连接试验研究[J]. 塑性工程学报,2022,29(12):83-89. [2] 郑开魁,林有希,蔡建国,等. 超声滚压工艺对模具钢激光熔覆层表面质量的影响[J]. 机械工程学报,2022,58(12):111-120. [3] 王文权,桑娜,胡春华. 表面纳米化对Dievar模具钢高能离子注渗WC层性能的影响[J]. 中国表面工程,2020,33(2):75-86. [4] 孙学娟,刘世雄,刘畅,等. 高速精密翅片散热带成型试验台的研制[J]. 制造技术与机床,2017(1):108-111. [5] Yang X D,Li C W,Zhang Z Y,et al. Effect of cobalt-based coating microstructure on the thermal fatigue performance of AISI EA4T hot work die steel[J]. Applied Surface Science,2020,521:146360. doi: 10.1016/j.apsusc.2020.146360 [6] 李绍宏,何文超,张旭,等. EA4T 型热作车轴钢表面改性技术研究进展[J]. 钢铁,2021,56(3):13-22. [7] 刘清阳,王华君,洪峰,等. EA4T 钢等离子堆焊Ni60A/Cr3C2 覆层的磨损及热疲劳性能[J]. 金属热处理,2020,45(10):175-180. [8] Wu H Y,Ye Y M,Lu H Q,et al. Tribological behavior of laser thermal sprayed Cr3C2-NiCr + 10%Ni/MoS2 composite coating on EA4T hot work mould steel[J]. Materials Research Express,2020,7(1):016599. doi: 10.1088/2053-1591/ab5ec6 [9] 白杰,霍元明,何涛,等. 基于GA-Arrhenius本构模型的EA4T钢高温变形行为[J]. 锻压技术,2022,47(11):246-253. [10] 肖棚,高杰维,刘里根,等. 激光熔覆修复EA4T车轴钢显微组织和强度评价[J]. 材料导报,2022,36(7):115-121. [11] 李行,张继旺,徐俊生,等. 缺陷对EA4T车轴钢疲劳性能的影响[J]. 西南交通大学学报,2021,56(3):627-633. [12] 冉旭,姜明坤,韩英. 高铁用进口EA4T钢车轴的组织和力学性能[J]. 机械工程材料,2019,43(8):41-45,74. [13] 徐锋,孙奇,刘鹏涛,等. 车削加工工艺对EA4T车轴钢疲劳性能的影响[J]. 机械工程材料,2018,42(4):62-67. [14] Hu B,Tu X,Luo H W,et al. Effect of warm rolling process on microstructures and tensile properties of 10 Mn steel[J]. Journal of Materials Science & Technology,2020,47(12):131-141. [15] Liu J B,Zhang X H,Cui Z Y,et al. Experimental investigation on ultrasonic surface rolling of Inconel 690TT[J]. Materials and Manufacturing Processes,2021,36(10):1208-1217. doi: 10.1080/10426914.2021.1905831 -
下载:
点击查看大图
图(9) / 表(2)
计量
- 文章访问数: 52
- HTML全文浏览量: 9
- PDF下载量: 9
- 被引次数: 0
