热挤压Al6061-B4C-T6复合材料力学性能和切削性能分析

IF 1.9 3区 工程技术 Q3 ENGINEERING, MANUFACTURING
Sibel Tinga, Halil Karakoç, S. Yağmur, M. Saravana Kumar, U. Şeker, R. Çıtak
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引用次数: 0

摘要

采用热挤压法制备了以Al6061合金为基体,B4C颗粒增强的复合材料。对复合材料的力学性能和切削性能进行了测试。将Al6061合金粉末(<100µm)和B4C颗粒(<10µm)与B4C的不同重量分数(重量比分别为3%、6%和9%)混合,在200 MPa压力下进行冷压。将冷压制的粉末金属块在550℃预热1 h后进行热挤压。然后对复合材料进行热挤压后的T6时效热处理。检测了显微组织、密度、硬度、抗拉强度和磨损性能。研究了切削速度和切削力对切削性能的影响。此外,还检测了表面粗糙度和切屑形成情况。高密度(99.6%)值实现挤压工艺。随着B4C颗粒比的增加,拉伸试样的硬度和拉伸值都有所提高,这一点可以从拉伸试样的断裂形貌中得到证实。在低增强(3% B4C)复合材料的加工中,刀具涂抹率很高。当进给速度为0.27 mm/rev,切削速度为250 m/min时,最大切削力为236 N。平均表面粗糙度随切削速度的增加而减小,随进给量的增加而增大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Performance analysis on mechanical and machinability attributes of Al6061-B4C-T6 composites processed via hot extrusion
In this study, composite materials with Al6061 alloy matrix and B4C particles reinforcement were produced by hot extrusion process. Fabricated composites were examined for the mechanical and machinability attributes. Al6061 alloy powders (<100 µm) and B4C particles (<10 µm) were mixed with the different weight fraction of B4C (3%, 6%, and 9% by weight) of and then cold pressed under 200 MPa pressure. The cold pressed powder metal block was extruded hot after preheating at 550°C for 1 h. Further, the composites were subjected to T6 aging heat treatment after hot extrusion. Microstructure, density, hardness, tensile strength, and wear properties were examined. The effects of cutting speed and cutting force on the machinability were also investigated. In addition, surface roughness and chips formation were examined. High density (99.6%) values were achieved with the extrusion process. With increasing B4C particles ratio, the hardness and tensile values were increased which was substantiated by the fracture morphology of the tensile specimens. It has been observed that tool smearing was high in the machining of the low-reinforced (3% B4C) composite. The highest cutting force was measured as 236 N at a feed rate of 0.27 mm/rev and a cutting speed of 250 m/min. It has also been observed that the average surface roughness decreased with increasing cutting speed and it increased with increasing feed rate.
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来源期刊
CiteScore
5.10
自引率
30.80%
发文量
167
审稿时长
5.1 months
期刊介绍: Manufacturing industries throughout the world are changing very rapidly. New concepts and methods are being developed and exploited to enable efficient and effective manufacturing. Existing manufacturing processes are being improved to meet the requirements of lean and agile manufacturing. The aim of the Journal of Engineering Manufacture is to provide a focus for these developments in engineering manufacture by publishing original papers and review papers covering technological and scientific research, developments and management implementation in manufacturing. This journal is also peer reviewed. Contributions are welcomed in the broad areas of manufacturing processes, manufacturing technology and factory automation, digital manufacturing, design and manufacturing systems including management relevant to engineering manufacture. Of particular interest at the present time would be papers concerned with digital manufacturing, metrology enabled manufacturing, smart factory, additive manufacturing and composites as well as specialist manufacturing fields like nanotechnology, sustainable & clean manufacturing and bio-manufacturing. Articles may be Research Papers, Reviews, Technical Notes, or Short Communications.
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