Wear Mechanism of the Rock Drill Buttons in the DTH Hammer Drill
详细信息
- 责任者：Piao Jinshi (College of Construction Engineering ; Jilin University ; Changchun 130026 ; China) ; Yin Kun
- 刊名：Journal of Jilin University
- 出版年：2011
- 卷期：41(1)
- 关键词：硬质合金钻头 ; tungsten-carbide bit ; 冲击回转钻进 ; percussive-rotary drilling
- 页码：p.195-199
- 图表：6 illus., 10 refs.
- 分类号：2000
- issnNo：ISSN1671-5888
- isbnNo：CN22-1343/P
摘要
On the base of results of cautiously investigation by scanning electron microscopy (SEM), the authors present a view on the deterioration and wear mechanisms of cemented carbide rock drill buttons for the DTH hammer drill. The deterioration mechanism includes a composite-scale crack formation, WC grain-scale crack formation, and oxidation and corrosion of WC grains. And wear mechanism includes crushing of WC grains and releasing of fragments, detachment of whole or parts of WC grains, tribo-chemical wear of the carbides. The reason why the buttons on the edge of the bit are worn so terribly is analyzed.