低温研磨对增材制造马氏体时效钢疲劳寿命的影响。

Effect of Cryogenic Grinding on Fatigue Life of Additively Manufactured Maraging Steel.

作者信息

Balan Arunachalam S S, Chidambaram Kannan, Kumar Arun V, Krishnaswamy Hariharan, Pimenov Danil Yurievich, Giasin Khaled, Nadolny Krzysztof

机构信息

Department of Mechanical Engineering, National Institute of Technology Karnataka, Mangaluru 575025, India.

Department of Automotive Engineering, School of Mechanical Engineering, Vellore Institute of Technology, Vellore 632014, India.

出版信息

Materials (Basel). 2021 Mar 5;14(5):1245. doi: 10.3390/ma14051245.

DOI:10.3390/ma14051245

PMID:33807985

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7961498/

Abstract

Additive manufacturing (AM) is replacing conventional manufacturing techniques due to its ability to manufacture complex structures with near-net shape and reduced material wastage. However, the poor surface integrity of the AM parts deteriorates the service life of the components. The AM parts should be subjected to post-processing treatment for improving surface integrity and fatigue life. In this research, maraging steel is printed using direct metal laser sintering (DMLS) process and the influence of grinding on the fatigue life of this additively manufactured material was investigated. For this purpose, the grinding experiments were performed under two different grinding environments such as dry and cryogenic conditions using a cubic boron nitride (CBN) grinding wheel. The results revealed that surface roughness could be reduced by about 87% under cryogenic condition over dry grinding. The fatigue tests carried out on the additive manufactured materials exposed a substantial increase of about 170% in their fatigue life when subjected to cryogenic grinding.

摘要

增材制造（AM）因其能够制造近净形的复杂结构并减少材料浪费，正在取代传统制造技术。然而，增材制造零件较差的表面完整性会降低部件的使用寿命。增材制造零件应进行后处理，以改善表面完整性和疲劳寿命。在本研究中，采用直接金属激光烧结（DMLS）工艺打印马氏体时效钢，并研究了磨削对这种增材制造材料疲劳寿命的影响。为此，使用立方氮化硼（CBN）砂轮在两种不同的磨削环境下进行磨削实验，即干式和低温条件。结果表明，与干式磨削相比，低温条件下表面粗糙度可降低约87%。对增材制造材料进行的疲劳试验表明，经过低温磨削后，其疲劳寿命大幅提高约170%。