Induction annealing process of 95CrMo steel for rock drilling rod

An annealing process and a drill rod technology are applied in the field of induction annealing process of 95CrMo steel used for rock drilling rods, which can solve the problems of high energy consumption, long production cycle and high production cost of the 95CrMo drill rod annealing process, and achieve low energy consumption, The heating device is simple and practical, and the production cost is low

Inactive Publication Date: 2013-06-12
SHOUGANG GUIYANG SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 95CrMo drill rod annealing process has the disadvantages of long production cycle, high energy consumption and high production cost

Method used

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  • Induction annealing process of 95CrMo steel for rock drilling rod
  • Induction annealing process of 95CrMo steel for rock drilling rod
  • Induction annealing process of 95CrMo steel for rock drilling rod

Examples

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Effect test

Embodiment 1

[0024] Example 1. The induction annealing process of 95CrMo steel for rock drilling rods, the 95CrMo steel, by weight percentage, its main components are C0.9-1.00%, Si0.15-0.40%, Mn0.15-0.40%, Cr0. 8~1.20%, Mo0.15~0.30%, P≤0.025%, S≤0.025%, Cu≤0.25%, the balance is Fe and unavoidable impurities; medium frequency induction heating is adopted, and the heating temperature is controlled at 830~880℃ , The heating and holding time is controlled at 80~300s, the cooling method is air cooling, and the annealing hardness is ≤255HB.

Embodiment 2

[0025] Example 2. The induction annealing process of 95CrMo steel for rock drilling rods, the 95CrMo steel, by weight percentage, its main components are C0.9-1.00%, Si0.15-0.40%, Mn0.15-0.40%, Cr0. 8~1.20%, Mo0.15~0.30%, P≤0.025%, S≤0.025%, Cu≤0.25%, the balance is Fe and unavoidable impurities; medium frequency induction heating is adopted, and the heating temperature is controlled at 830~880℃ , The heating and holding time is controlled at 120~300s, the cooling method is air cooling, and the annealing hardness is ≤255HB.

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Abstract

The invention discloses an induction annealing process of 95CrMo steel for a rock drilling rod. In the process, medium frequency induction heating is adopted, the heating temperature is controlled to be 830-880 DEG C, the heating and heat-insulating time is controlled to be 80-300 seconds, the cooling mode is air-cooling, and the annealing hardness is not greater than 255 HB. The induction annealing process disclosed by the invention is an overturn for the traditional annealing process of 95CrMo steel for a rock drilling rod, has the advantages of short heating and heat-insulating time, uniform annealing, low energy consumption, short production cycle, low production cost and the like, does not need a cooling device, is a historic transformation for the annealing process for 95CrMo steel for a drilling tool, and has great use value and economic value at present when energy conservation and environment protection are advocated in the whole society.

Description

technical field [0001] The invention relates to an annealing process, in particular to an induction annealing process of 95CrMo steel used for rock drilling rods, and belongs to the technical field of metallurgy. Background technique [0002] 95CrMo steel is currently the steel with the largest output in the world for drilling tools. It is the main steel grade widely used to produce H19mm, H22mm and H25mm hollow steel by major domestic and foreign famous drilling tool companies such as SANDVIK, Atlas, and Shougang Guiyang Special Steel Company. It is the preferred raw material for today's taper-connected hollow hexagonal drill rods, integral drill rods, light tail drills and other products. [0003] The annealing process is to heat the steel above or below the critical point temperature of the steel (hypoeutectoid steel is 20-30°C above Ac1, eutectoid and hypereutectoid steel is 30-30°C above Ac3), heat preservation After a certain period of time, it is slowly cooled in a f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/26C21D1/42
CPCY02P10/25
Inventor 杨云徐斌唐文龙王筑生熊克胜唐维兵熊家泽李永金支庆将志勇
Owner SHOUGANG GUIYANG SPECIAL STEEL
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