变厚度熔覆层沉积成形工艺与性能研究

doi:10.12068/j.issn.1005-3026.2020.03.013

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (3): 374-379.DOI: 10.12068/j.issn.1005-3026.2020.03.013

变厚度熔覆层沉积成形工艺与性能研究

辛博，周显新，巩亚东

(东北大学机械工程与自动化学院，辽宁沈阳110819)

收稿日期:2019-04-26 修回日期:2019-04-26 出版日期:2020-03-15 发布日期:2020-04-10
通讯作者: 辛博
作者简介:辛博(1988-)，男，吉林通化人，东北大学讲师，博士; 巩亚东(1958-)，男，辽宁本溪人，东北大学教授，博士生导师.
基金资助:
中央高校基本科研业务费专项资金资助项目(N170303009，N180703007).

Study on the Process and Performance of Variable Thickness Cladding Layer Deposition

XIN Bo， ZHOU Xian-xin， GONG Ya-dong

School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China.

Received:2019-04-26 Revised:2019-04-26 Online:2020-03-15 Published:2020-04-10
Contact: XIN Bo
About author:-
Supported by:
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摘要/Abstract

摘要： 为减少由等厚度熔覆层成形引起的阶梯效应，提出变扫描速度和不等高搭接方法打印变厚度熔覆层.基于光栅扫描路径，建立了变厚度切片模型，并与等厚度熔覆层成形工艺对比，分析了斜坡长方体的表面质量、硬度以及微观组织分布.实验结果表明:采用变厚度熔覆成形工艺能有效提高成形件的几何精度，并揭示了成形件纵截面上晶粒生长方向的变化规律.在成形件的扫描和搭接方向，最大硬度值均出现在高端附近.

关键词: 变厚度熔覆层, 扫描速度, 几何精度, 晶粒生长方向, 维氏硬度

Abstract: In order to reduce the step-effect caused by uniform thickness cladding layers， the variable scanning speed and height-varying overlapping methods were proposed to form variable thickness cladding layers. Based on the raster scanning path， the geometric model with variable thickness slices was established. The surface quality， hardness and microstructure distribution of the ramp cuboids were observed， compared with uniform thickness cladding layer deposition. The results showed that the process of variable thickness cladding layers can dramatically improve geometric precision. The variation of grain growth direction at the longitudinal section of the formed samples is revealed. Moreover， in the scanning and overlapping direction， the maximum hardness value appears near the high end.

Key words: variable thickness cladding layer, scanning speed, geometric precision, grain growth direction, Vickers hardness

中图分类号:

TG142.1

辛博，周显新，巩亚东. 变厚度熔覆层沉积成形工艺与性能研究[J]. 东北大学学报:自然科学版, 2020, 41(3): 374-379.

XIN Bo， ZHOU Xian-xin， GONG Ya-dong. Study on the Process and Performance of Variable Thickness Cladding Layer Deposition[J]. Journal of Northeastern University Natural Science, 2020, 41(3): 374-379.

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变厚度熔覆层沉积成形工艺与性能研究

Study on the Process and Performance of Variable Thickness Cladding Layer Deposition

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