Research into Bit for Extra-Hard Rock

Zhang, Shi Hong; Yang, Kai; Lu, Fanghua

doi:10.4028/www.scientific.net/kem.202-203.485

Cited by 4 publications

(2 citation statements)

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“…The constant number of diamond per unit area in a diamond tool's working face is also an indicator of retention strength : [90] According to the above methods, the bonding strength is determined as the ratio of the fracture force to the contact spot area, which is measured under a microscope:…”

Section: Mechanical Calculation Methodsmentioning

confidence: 99%

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A Review of the Diamond Retention Capacity of Metal Bond Matrices

Xiao-jun

Duan

2018

Metals

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This article presents a review of the current research into the diamond retention capacity of metal matrices, which largely determines the service life and working performance of diamond tools. The constitution of diamond retention capacity, including physical adsorption force, mechanical inlaying force, and chemical bonding force, are described. Improved techniques are summarized as three major types: (1) surface treatment of the diamond: metallization and roughening of the diamond surface; (2) modification of metal matrix: the addition of strong carbide forming elements, rare earth elements and some non-metallic elements, and pre-alloying or refining of matrix powders; (3) change in preparation technology: the adjustment of the sintering process and the application of new technologies. Additionally, the methods used in the evaluation of diamond retention strength are introduced, including three categories: (1) instrument detection methods: scanning electron microscopy, X-ray diffractometry, energy dispersive spectrometry and Raman spectroscopy; (2) mechanical test methods: bending strength analytical method, tension ring test method, and other test methods for chemical bonding strength; (3) mechanical calculation methods: theoretical calculation and numerical computation. Finally, future research directions are discussed.

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Section: Mechanical Calculation Methodsmentioning

confidence: 99%

“…The constant number of diamond per unit area in a diamond tool's working face N is also an indicator of retention strength τ : [90]…”

Section: Mechanical Calculation Methodsmentioning

confidence: 99%

A Review of the Diamond Retention Capacity of Metal Bond Matrices

Xiao-jun

Duan

2018

Metals

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Designing of concrete diamond sawblade

Zhang

Ding

Zhou

2005

J Cent. South Univ. Technol.

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Designing of concrete diamond sawblade ®ZHANG Shao-he(~1l) 1' z, DING Xin-yu(T~) ~ , ZHOU Jia-xiang(N~j{~ift=) a (1.Abstract: By analyzing the abrasive theory of concrete diamond sawblade, the proposal that the diamond should be selected by its function in cutting concrete is presented. The part of the big grit diamonds cut rock, and the part of the small grit diamonds improve the wearability of the matrix. The contrast tests are done with different shapes of sawbaldes in split segment, slant "U" slot segment, sandwich segment, turbo segment and three-slot segment. The special shapes of sawblades can improve the effect of cooling and the removing ability of the rock powder. The data of tests show that the efficiency of cutting and the life of sawblades are improved by designing the diamond prescription and using the especial geometry of segment.

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