覆层后的金刚石强度、与金属胎体的结合力和抗温(烧结钻头时的温度)性能，以及导电性等有明显的提高。
The strength of the coated diamond, the bonding force with the metallic matrix, heat resistance (sintering temperature of diamond bits) and conductance are all improved.
用球状烧结碳化钨代替粒状铸造碳化钨作钢齿钻头齿面堆焊材料是提高齿面强化效果的有效途径。
It is available to strengthen the bit teeth by replacing the granular casting tungsten carbide with the spheroidal sintering tungsten carbide.
烧结直柄钻头：适用于玻璃、陶瓷、宝石等硬脆材料的钻孔。
Sinter type straight-handle drills: Use for drilling hard and brickle material, such as glass, ceramics, jewellery etc.
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