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Special-shaped pipe for heavy-duty-reducing rotary drilling rig mast ultrahigh-strength low-alloy guide rail

A rotary drilling rig and special-shaped pipe technology, which is applied in the field of special-shaped pipes, can solve the problems of guide rail damage and short service life, and achieve the effects of reducing weight, improving high strength, and improving low-temperature impact resistance

Inactive Publication Date: 2019-05-10
JIANGSU SANCES STEEL PIPE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above steel formula prepares high-strength alloys, when drilling hard rock formations, the ambient temperature is low, the toughness and plasticity of the metal decrease with the decrease of temperature, and the cold brittle fracture of the metal is the same as the brittle failure at room temperature. The state is basically the same, it occurs suddenly when there is no obvious plastic deformation, the port is smooth and bright, the crack generally originates from the defect or stress concentration in the metal structure, and propagates at a fast speed, and is made of high-strength alloy in the prior art The guide rails are often damaged and have a short service life

Method used

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  • Special-shaped pipe for heavy-duty-reducing rotary drilling rig mast ultrahigh-strength low-alloy guide rail

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A special-shaped tube for a super-high-strength low-alloy guide rail of a heavy-duty rotary drilling rig mast, which is prepared by the following steps:

[0046] (1) Weighing according to weight percentage: C 0.08%, Si 0.35%, Mn 0.8%, P 0.015%, Cu 0.25%, Al0.012%, Mo 0.8%, B 0.03%, Ti 0.05%, Cr 0.2% and The balance is composed of Fe and impurities;

[0047] (2) Normalizing rolled special-shaped pipe at a temperature of 1030°C;

[0048] (3) Put the rolled special-shaped tube into a furnace at 890°C for 30 minutes, then quickly put it into a furnace at 600°C, keep it for 10 hours, and then air-cool it to below 150°C and take it out;

[0049] (4) inject high-temperature limestone sand into the special-shaped pipe after cooling, the temperature of limestone sand is 400 ℃, utilize hydraulic cold drawing machine to carry out cold extrusion compression deformation with the pulling force of 380 tons, and the longitudinal deformation is 60~150%;

[0050] (5) Heat treatment:

...

Embodiment 2

[0054] A special-shaped tube for a super-high-strength low-alloy guide rail of a heavy-duty rotary drilling rig mast, which is prepared by the following steps:

[0055] (1) Weighing according to weight percentage: C 0.09%, Si 0.38%, Mn 1.0%, P 0.018%, Cu 0.30%, Al0.016%, Mo 0.8%, B 0.03%, Ti 0.08%, Cr 0.3% and The balance is composed of Fe and impurities;

[0056] (2) Normalizing rolled special-shaped pipe at a temperature of 1050°C;

[0057] (3) Put the rolled special-shaped tube into a furnace at 900°C for 35 minutes, then quickly put it into a furnace at 610°C, keep it warm for 10 hours, and then air-cool it to below 150°C and take it out;

[0058] (4) inject high-temperature limestone sand into the special-shaped pipe after cooling, the temperature of limestone sand is 400 ℃, utilize hydraulic cold drawing machine to carry out cold extrusion compression deformation with the pulling force of 400 tons, and the longitudinal deformation is 60~150%;

[0059] (5) Heat treatmen...

Embodiment 3

[0063] A special-shaped tube for a super-high-strength low-alloy guide rail of a heavy-duty rotary drilling rig mast, which is prepared by the following steps:

[0064] (1) Weighing according to weight percentage: C 0.095%, Si 0.40%, Mn 1.1%, P 0.020%, Cu 0.32%, Al0.022%, Mo 1.0%, B 0.045%, Ti 0.10%, Cr 0.35% and The balance is composed of Fe and impurities;

[0065] (2) Normalizing rolled special-shaped pipe at a temperature of 1080°C;

[0066] (3) Put the rolled special-shaped tube into a furnace at 900°C for 35 minutes, then quickly put it into a furnace at 620°C, keep it warm for 10-12 hours, and then air-cool it to below 150°C and take it out;

[0067] (4) inject high-temperature limestone sand into the special-shaped pipe after cooling, the temperature of limestone sand is 420 ℃, utilize hydraulic cold drawing machine to carry out cold extrusion compression deformation with the pulling force of 450 tons, and the longitudinal deformation is 60~150%;

[0068] (5) Heat tr...

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Abstract

The invention relates to a special-shaped pipe for a heavy-duty-reducing rotary drilling rig mast ultrahigh-strength low-alloy guide rail. The chemical components of the special-shaped pipe for the heavy-duty reducing rotary drilling rig mast ultrahigh-strength low-alloy guide rail comprises of, by weight, 0.08-0.11% of C, 0.35-0.45% of Si, 0.8-1.5% of Mn, 0.015-0.025 % of P, 0.25-0.4% of Cu, 0.012-0.035% of Al, 0.8-1.2% Mo, 0.03-0.06% of B, 0.05-0.15% of Ti, 0.2-0.5% of Cr, and the balance Fe and impurities. The application takes low-carbon steel as a foundation, the Ti, the Cr and the B areadded to carry out alloying treatment of elements, the strength of the formed alloy is remarkably improved, face-centered cubic metal containing the Cu and the Al and formed body-centered cubic alloyare both low in impact value in a wide temperature range, and have good low-temperature impact toughness.

Description

technical field [0001] The invention relates to the technical field of alloy steel for masts, in particular to a special-shaped pipe for super-high-strength low-alloy guide rails of a heavy-duty rotary drilling rig mast. Background technique [0002] In recent years, with the continuous development of the economy, the development speed of my country's rotary drilling rig industry has advanced by leaps and bounds. Rotary drilling rigs are widely used in the foundation pile construction of large buildings such as roads, railways, and bridges in my country. During the foundation pile construction process, the mast is the key load-bearing part of the rotary drilling rig, the supporting part for the installation of the drill pipe and the power head, and the guiding part for the sliding of the traveling frame. It is very important for the safety and construction performance of the rotary drilling rig. Significance. [0003] The existing Chinese patent with authorized notification...

Claims

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Application Information

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IPC IPC(8): C22C38/32C22C38/28C22C38/22C22C38/20C22C38/06C22C38/04C22C38/02C21D1/18C21D8/10C21D9/08
Inventor 张政
Owner JIANGSU SANCES STEEL PIPE CO LTD
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