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Self-connecting type and high-strength seamless steel tube for rope coring drill rod, as well as manufacturing method thereof

A technology of seamless steel pipe and manufacturing method, which is applied in the steel pipe manufacturing industry and the manufacturing field of seamless steel pipe, can solve the problems of insufficient strength, insufficient plasticity, and inability to process, so as to reduce surface cracks, have good plasticity, and have excellent comprehensive mechanical properties. Effect

Inactive Publication Date: 2013-09-04
浙江新纪元管业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the carbon content is low, resulting in insufficient strength. However, if the carbon content is only increased, it cannot be processed due to insufficient plasticity.

Method used

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  • Self-connecting type and high-strength seamless steel tube for rope coring drill rod, as well as manufacturing method thereof
  • Self-connecting type and high-strength seamless steel tube for rope coring drill rod, as well as manufacturing method thereof
  • Self-connecting type and high-strength seamless steel tube for rope coring drill rod, as well as manufacturing method thereof

Examples

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Embodiment Construction

[0052] The present invention will be described in further detail below through examples, and the following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0053] see Figure 7 In this embodiment, the method for manufacturing a seamless steel pipe for a self-joining high-strength wireline core drill rod includes the following steps.

[0054] (1) The weight percentage is C: 0.38~0.43%, Si: 0.17~0.35%, Mn: 0.70~0.90%, P≤0.015%, S≤0.010%, Cr: 0.90~1.10%, Mo: 0.15~0.25 %, Cu: ≤0.10%, Ni: ≤0.10%, AS≤0.015%, Sn≤0.015%, Sb≤0.010%, Pb≤0.008%, Bi≤0.010%, the balance is the tube embryo of Fe, placed in heating Heating in the furnace, the temperature of the heating furnace is 1190-1250°C. Among them, AS+Sn+Sb+Pb+Bi≤0.035%, which means that the sum of the weight of AS, Sn, Sb, Pb and Bi accounts for the percentage of the total amount≤0.035%.

[0055] (2) The tube billet is hot-rolled and perforated to make a ...

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Abstract

The invention relates to a self-connecting type and high-strength seamless steel tube for a rope coring drill rod. The seamless steel tube is characterized by comprising components in percentage by weight as follows: 0.38%-0.43% of C, 0.17%-0.35% of Si, 0.70%-0.90% of Mn, P smaller than or equal to 0.015%, S smaller than or equal to 0.010%, 090%-1.10% of Cr, 0.15%-0.25% of Mo. Cu smaller than or equal to 0.10%. Ni smaller than or equal to 0.10%, AS smaller than or equal to 0.015%, Sn smaller than or equal to 0.015%, Sb smaller than or equal to 0.010%, Pb smaller than or equal to 0.008%, Bi smaller than or equal to 0.010%, and the balance of Fe. The seamless steel tube has high strength. The invention further relates to a manufacturing method of the seamless steel tube.

Description

technical field [0001] The invention relates to a seamless steel pipe for self-connecting high-strength wireline core drilling rods, and also relates to a manufacturing method of the seamless steel pipe, which belongs to the steel pipe manufacturing industry. Background technique [0002] With the rapid development of my country's national economy, the shortage of mineral resources has become a strategic issue that needs to be solved urgently during the "Twelfth Five-Year Plan" period. According to the investigation of the authoritative geological exploration organization, the domestic exploration of mineral resources within 1,500 meters has been basically completed. In the future, the depth of drilling and coring construction will gradually develop to medium and deep holes of 2,000 to 3,000 meters. Moreover, this depth drilling generally adopts a full hydraulic power head drilling rig in the world, while in my country, a vertical shaft drilling rig was generally used in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/22C21D8/10C23C22/07E21B17/00
Inventor 吴国忠况雪军肖红路继林叶火群刘绍波
Owner 浙江新纪元管业科技有限公司
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