Yao Guolin*,Luo Xinyu,Chen Ziran.Study on laser cladding technology on Q345B steel surface controlled by PLC and it s coating property[J].Plating & Finishing,2023,(12):42-48.[doi:doi ： 10.3969/j.issn.1001-3849.2023.12.006]
Q345B钢表面激光熔覆工艺的PLC控制与涂层性能研究
- Title:
- Study on laser cladding technology on Q345B steel surface controlled by PLC and it s coating property
- 关键词:
- Q345B 钢; 激光熔覆; Y 2 O 3 涂层; 显微组织; 性能
- Keywords:
- Q345B steel ; laser cladding ; Y 2 O 3 coating ; microstructure ; property
- 分类号:
- TG174.4
- 文献标志码:
- A
- 摘要:
- 为了提升 Q345 钢的表面耐磨性和耐蚀性能，采用可编程逻辑控制器（ PLC ）控制激光熔覆工艺，以 F60 合金粉作为熔覆材料，制备了无 Y 2 O 3 的涂层和添加 Y 2 O 3 的涂层，对比分析了两种涂层的物相组成、显微组织、硬度、耐磨性能和耐腐蚀性能。结果表明，无 Y 2 O 3 涂层和添加 Y 2 O 3 涂层中都含有 ɑ- （ Fe ， Cr ）、 ɑ-Fe 、（ Fe ， Cr ） 7 C 3 、 γ - （ Fe ， Cr ）和 CrFeB 相，且添加 Y 2 O 3 涂层中还出现了 Y 2 O 3 相；两种涂层都与 Q345 钢基体结合良好；添加 Y 2 O 3 涂层的晶粒尺寸和二次枝晶臂间距都小于无 Y 2 O 3 涂层，且添加 Y 2 O 3 涂层枝晶区域的 Fe 和 B 元素含量低于无 Y 2 O 3 涂层；相同涂层距离处，添加 Y 2 O 3 涂层的硬度都高于无 Y 2 O 3 涂层，且都明显高于基体；无 Y 2 O 3 涂层和添加 Y 2 O 3 涂层的耐磨性和耐蚀性都优于 Q345 钢基体，且添加 Y 2 O 3 涂层的耐蚀性和耐磨性高于无 Y 2 O 3 涂层，这主要与涂层中存在（ Fe ， Cr ） 7 C 3 和 CrFeB 等硬质相、添加 Y 2 O 3 涂层的晶粒和二次枝晶臂间距更加细小等有关。
- Abstract:
- ： In order to improve the surface wear resistance and corrosion resistance of Q345 steel ， Y 2 O 3 free coating and Y 2 O 3 added coating were prepared using laser cladding process controlled by programmable logic controller （ PLC ） . The phase composition ， microstructure ， hardness ， wear resistance and corrosion resistance of the two coatings were compared and analyzed. The results show that both Y 2 O 3 free coatings and Y 2 O 3 added coatings contain ɑ- （ Fe ， Cr ）， ɑ-Fe ， （ Fe ， Cr ） 7 C 3 ， γ - （ Fe ， Cr ） and CrFeB phases. Y 2 O 3 phase also appears in the Y 2 O 3 added coating. Both coatings have good bonding with Q345 steel matrix. The grain size and secondary dendrite arm spacing of Y 2 O 3 added coating are smaller than those of Y 2 O 3 free coating. The content of Fe and B elements in the dendrite area of Y 2 O 3 added coating is lower than that of Y 2 O 3 free coating. At the same coating distance ， the hardness of the Y 2 O 3 added coating is higher than that of the Y 2 O 3 free coating ， and are significantly higher than that of the substrate. The wear resistance and corrosion resistance of the Y 2 O 3 free coating and the Y 2 O 3 added coating are better than those of Q345 steel substrate. The corrosion resistance and wear resistance of the Y 2 O 3 added coating are higher than those of the Y 2 O 3 free coating ， which is mainly related to the existence of hard phases such as （ Fe ， Cr ） 7 C 3 and CrFeB in the coating ， and the finer grain and secondary dendrite arm spacing of the Y 2 O 3 added coating.
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备注/Memo
收稿日期： 2023-02-01 修回日期： 2023-02-14 作者简介： 姚国林（ 1974 —）男，硕士，副教授，主要从事材料加工等方面研究， email ： 865778269@qq.com 基金项目： 河南省科技攻关计划项目（ 212102210395 ）