文献类型：期刊文献

中文题名：基于金属粉末的3D打印煤巷锚杆基本力学性能与应用研究

英文题名：Fundamental mechanical properties and application of coal mine bolt manufactured by metallic powder based on 3D printing technology

作者：冯晓巍[1];薛飞[2];宋万新[3]

机构：[1]中国矿业大学矿业工程学院,江苏徐州221116;[2]绍兴文理学院土木工程学院浙江省岩石力学与地质灾害重点实验室,浙江绍兴312000;[3]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116

年份：2021

卷号：50

期号：6

起止页码：1019

中文期刊名：中国矿业大学学报

外文期刊名：Journal of China University of Mining & Technology

收录：CSTPCD、、CSCD2021_2022、EI(收录号：20214611161835)、Scopus、北大核心、CSCD、北大核心2020

基金：国家自然科学基金项目(51804296);中国博士后科学基金特别资助项目(2019T120480);浙江省自然科学基金项目(LQ20E080006)。

语种：中文

中文关键词：3D打印;锚杆;金属粉末;力学强度;SEM分析

外文关键词：3D printing;bolt;metallic powder;mechanical strength;SEM analysis

中文摘要：通过三维扫描仪获取了煤巷锚杆的数字模型,采用3种不同的金属粉末(铝合金、不锈钢、模具钢)作为打印材料,以选择性激光熔化(SLM)3D打印技术制作了左旋无纵筋锚杆,并进行了拉伸测试,扫描电子显微镜(SEM)测试和金相测试,最后探讨了3D打印锚杆的初步应用.结果表明:所制作的锚杆在表面细节上与原型锚杆高度相似;相较于原型锚杆,模具钢粉末成型锚杆具有更高的强度,不锈钢粉末成型锚杆在强度和变形方面最接近于原型锚杆,铝合金粉末成型锚杆则表现出了相对较低的强度.通过SEM断口分析发现模具钢粉末成型锚杆的微观结构相对致密,金属粉末熔化效果良好,故其强度较高;铝合金粉末成型锚杆的微观结构气孔密布,结构松散,金属粉末熔化不全,故其强度较低;不锈钢粉末成型锚杆虽有气孔也有未融化金属粉末,但较铝合金粉末成型锚杆而言要少很多.热处理后的不锈钢粉末成型锚杆在延伸率和强化阶段方面进一步改善,且微观组织更为致密,进一步金相分析表明金属粉末3D打印成型锚杆具有"鳞片"状金属组织结构.

外文摘要：The digital model of coal mine bolt was obtained by 3 D scanner, and three metallic powders(aluminium alloy, stainless steel and die steel) were selected as printing materials, thereby the left-hand thread bolts were manufactured by SLM(selective laser melting) printing technology. Afterwards, tensile tests, SEM tests and metallographic tests were carried out, finally the preliminary application of 3 D printed bolts was analyzed. The results show that the manufactured bolts share a very high similarity with prototype bolt in regards to surface details. Compared with prototype bolt, bolt manufactured by die steel powder has a very high strength. Bolt manufactured by stainless steel powder has a narrow gap with prototype bolt in regards to the strength and displacement. For bolt manufactured by aluminum powder, however, the strength is quite low. Following SEM test reveals that the microscopic structure for bolt manufactured by die steel powder is relatively dense and the powder melting effect is also favorable, thereby the reason of its high strength is explained. Microscopic structure for bolt manufactured by aluminum has a lot of pores and a loose structure, the melting effect is insufficient, which explained the reason of its low strength. Microscopic structure for bolt manufactured by stainless steel powder also has some pores and some unmelted powders, whilst the extent is much lower. Bolt manufactured by stainless steel, after heat treatment, can be improved both from elongation percentage aspect and strengthening phase aspect, and can be improved with outstanding dense microscopic structure. Further metallographic analysis demonstrates that metallic powder based 3 D printed bolt has scale-like microscopic structure.