小型花岗岩钻头用硬质合金麻花钻头失效分析

IF 0.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materiali in tehnologije Pub Date : 2023-05-30 DOI:10.17222/mit.2023.702

Saurabh Dewangan, J. Burja

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引用次数: 0

摘要

本文对用于小型花岗岩钻孔的WC-Co硬质合金麻花钻头进行了失效分析。本研究采用台钻。该研究的目的是分析通常在矿山中进行的模拟原位岩石钻探作业。钻孔15分钟后，用扫描电子显微镜检查钻孔。肉眼观察，钻头的两个刃口都有轻微的磨损迹象，但并不明显。凿边也有磨损，可见一些肉眼可见的磨损痕迹。电子显微图显示了碳化钨颗粒在微纳水平上的各种分解迹象，包括碳化钨颗粒中的裂纹、颗粒中的空洞、共结合剂侵蚀和一些较重的磨损痕迹。此外，碳化物颗粒的某些部分被一层薄薄的岩石所覆盖。磨损分析是准确了解刀具损伤行为的重要方法，因此可以改变材料成分以避免刀具过早失效。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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FAILURE ANALYSIS OF CARBIDE TWIST-DRILL BIT FOR SMALL-SCALE GRANITE DRILLING

This paper deals with a failure analysis of WC-Co carbide-based twist drills used for small-scale granite drilling. A bench-top drill was used for this study. The aim of the study was to analyse a simulated in-situ rock-drilling operation normally carried out in mines. After a drilling time of 15 minutes, the drills were examined using scanning electron microscopy. On macroscopic observation, both cutting edges of the drills showed slight signs of abrasion, but these were not significant. The chisel edge was also abraded and showed some macroscopic abrasion marks. The electron micrographs showed various signs of decomposition at the micro and nano levels, including cracks in the WC grains, cavities in the grains, Co-binder erosion and some heavy abrasion marks. In addition, some parts of the carbide grains were covered with a thin layer of rock. The wear analysis is an important approach to understanding exactly the damage behaviour of the tool so that the material composition can be changed to avoid premature tool failure.

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来源期刊

Materiali in tehnologije 工程技术-材料科学：综合

CiteScore

1.30

自引率

0.00%

发文量

审稿时长

4-8 weeks

期刊介绍： The journal MATERIALI IN TEHNOLOGIJE/MATERIALS AND TECHNOLOGY is a scientific journal, devoted to original papers and review scientific papers concerned with the areas of fundamental and applied science and technology. Topics of particular interest include metallic materials, inorganic materials, polymers, vacuum technique and lately nanomaterials.