Process flow

Process flow

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Raw Material

Processing

Processing

Luoyang Guangtuo Drilling Tools Co., Ltd.’s H22 conical connecting drill rods are made of 55SiMnMo in accordance with the production executive standard of GB/T6481-2002. The rods are produced by international advanced processes and methods according to the following procedures:

1. GTIII/QSAAA: EBT electric arc furnace melting – LF furnace external refining – VD vacuum degassing – large continuous casting billets 430*510 – cogging into square billets 150*150 – drilling – assembling alloy pipes for cored rolling – processing by a professional steel sharpening production process.

2. G30: EBT electric arc furnace melting – LF furnace external refining – VD vacuum degassing – continuous casting billets 150*150 – drilling – assembling alloy pipes for cored rolling – processing by a professional steel sharpening production process.

3. QSAA: EBT electric arc furnace melting – LF furnace external refining – pipe casting method – cored rolling – processing by a professional steel sharpening production process.

The products are widely applied to mining, the engineering construction of highways, railways and tunnels, the engineering construction of hydropower stations and nuclear power stations, as well as other projects. In Guangtuo’s H22 conical connecting drill rods, the bit shanks are matched with 7655, YT28 & YT29 rock drills and other rock drills, and the drill tips are matched with straight, crossed and spherically-toothed drill bits.