11 2 Vol.11, No Thermal Spray Technology Jun., 2019 ( 山东能源重装集团大族再制造有限公司, 山东新泰 ) 摘要 : 27SiMn 1.5 关键词 : 中图分类号 :TG174.4 A 文章编号 :

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1 11 2 Vol.11, No Thermal Spray Technology Jun., 2019 ( 山东能源重装集团大族再制造有限公司, 山东新泰 ) 摘要 : 27SiMn 1.5 关键词 : 中图分类号 :TG174.4 A 文章编号 : DOI /j.issn The Design and Application of High-power Fiber Laser Cladding Equipment on Ring Inner Wall Xueyun Du, Hongfang Tian, Shiying Dong, Fanliang Tantai, Qingling Hou Shandong Ener gy Heavy Equipment Group Dazu Remanufacturing Co.,Ltd, Xintai , China Abstract: In order to improve the service performance of the inner hole parts such as the column cylinder of hydraulic support, the inner wall cladding equipment was developed with the integration of high-power fiber lasers, the cladding process on the inner wall in the 27SiMn cylinder was verified, and the microstructure, hardness, and wear resistance were tested. The results show that the inner wall cladding surface is flat and without defects, and the cladding layer is metallurgical combined with the matrix. The main structure of the cladding layer is martensite. The hardness of the cladding layer is slightly higher than that of the substrate, and the wear resistance is about 1.5 times that of the substrate, as a result, not only the performance of the inner wall of the cylinder was improved but also the machining properties of the cladding coating in a narrow space are optimized. Key words: High power, Fiber optic inner wall cladding, Equipment development, Application 0 引言 [1] [2-6] [7] dxy851117@163.com 2018CXGC0811

2 32 11 [8] 1 1 实验材料及方法 SN ~+270 Φ mm 27SiMn 2 1 ( %) Table 1 Key chemical composition of iron-based alloy (mass fraction %) C Si Mn Mo V W Cr Ni Fe SiMn % Table 2 Composition of 27SiMn (mass fraction %) C Si Mn V Ni Cu S P W 10mm 2mm 150mm mm/min 5mm/s 20-30g/min ml/80cm² h 5%NaCl 10 mm 10 mm 10 mm HVS-1000A 4% AxioLab.A1 50 mm 50 mm mm 5kW Φ43 8mm 2 内孔熔覆装备设计 8-15L/min 1-2mm (1) 1064nm QBH 1500mm 3.0kW 300mm (2) 150mm

3 mm (3) 1 Fig.1 Inner wall processing head (4) 6-10bar m 3 /min 3 工艺验证及结果讨论 3.1 2(a) 27SiMn 1 2(b) 3 (a) (b) 2 (a) ; (b) Fig. 2 Laser cladding process and cladding effect: (a) cladding process, (b) cladding effect

34 热喷涂技术 11 卷情况极易导致熔覆开裂等缺陷的形成且严重第二需要控制热量积累激光熔覆是一个骤热影响送粉熔凝过程如图 3 为本实验选用的合骤冷的过程熔池存留时间短生成的一些低熔金粉末粒度情况可见粉末颗粒呈圆形分布球点化合物如硼硅酸盐等来不及上浮至熔覆层表面型颗粒度较为均匀光滑球形度较高粒度直径留置在熔覆层内即成为潜在缺陷源故而需要约为

4 34 热喷涂技术 11 卷情况极易导致熔覆开裂等缺陷的形成且严重第二需要控制热量积累激光熔覆是一个骤热影响送粉熔凝过程如图 3 为本实验选用的合骤冷的过程熔池存留时间短生成的一些低熔金粉末粒度情况可见粉末颗粒呈圆形分布球点化合物如硼硅酸盐等来不及上浮至熔覆层表面型颗粒度较为均匀光滑球形度较高粒度直径留置在熔覆层内即成为潜在缺陷源故而需要约为 63.6μm ~139.6μm 粒度均匀且球形度高的借助散热系统合理调控狭窄空间内的热量输入和合金粉末具备高流动性可以有效保障熔覆送粉发散保障正常熔覆所需要的环境条件的流畅均匀有助于降低熔覆缺陷的产生机率图 3 合金粉末颗粒图 (a) 颗粒剖面图 ; (b) 颗粒形貌图 Fig. 3 Alloy powder particle diagram: (a) profile, (b) particle morphology 3.2 熔覆层显微结构熔池停留时间短骤热骤冷故激光熔覆层的组图 4 为熔覆层的组织结构由图 4(a) (b) 可织较为细小均匀主要组织均为马氏体和少量见熔覆层无裂纹气孔等缺陷组织呈细小致残余奥氏体如图 (c) 所示结合界面附近的基体密的枝晶状且结合界面清晰平滑可见白亮窄带组织的细晶区该区域冷却后形成较为粗大的回说明熔覆层与基体之间为冶金结合在大激光功火马氏体率下基体和熔覆材料吸收的有效能量密度大图 4 激光熔覆层组织结构 (a) 试样剖面 ; (b) 熔覆层 ; (c) 结合界面及热影响区 Fig. 4 Structure of laser cladding layer: (a) sample profile, (b) cladding layer, (c) combined interface and thermal impact zone 3.3 熔覆层硬度检测对内孔熔覆试样进行机械加工保留有效熔覆层厚度为 0.5mm 取样进行剖面硬度检测间隔 0.25mm 折线取检测点硬度梯度曲线如图 5

5 Fig. 5 Hardness gradient of cladding sample HV HV1 Cr Mo Nb [9] [5] 3.4 MMU-10G h Table 3 Weight of abrasion loss /g /g /g 4 结论 [1]. [J]., 2013, 34(7): [2],,,. [J]., 2016, 38(8): [3],,,. [J]., 2010, 31 (10): [4],,. [J]., 2011, 39(12): [5],,,. Ni60A+20%WC [J]2012, 37(2): [6],,. [J]., 2013, 41(6): [7]. [J]., 1998, (6): 37. [8],. [J]., 2016(4): [9],,,. 27SiMn [J]., 2018, 46(1):

T K mm mm Q345B 600 mm 200 mm 50 mm 600 mm 300 mm 50 mm 2 K ~ 0. 3 mm 13 ~ 15 mm Q345B 25

T K mm mm Q345B 600 mm 200 mm 50 mm 600 mm 300 mm 50 mm 2 K ~ 0. 3 mm 13 ~ 15 mm Q345B 25 23 4 2018 8 Vol. 23 No. 4 JOURNAL OF HARBIN UNIVERSITY OF SCIENCE AND TECHNOLOGY Aug. 2018 Q345B 1 " 1 2 2 2 1. 150040 2. 200125 Q345B 536. 47 MPa 281 HV Q345B DOI 10. 15938 /j. jhust. 2018. 04. 021 TG444