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Piercing plug of steel pipe and preparation method thereof

A technology of perforated plugs and steel pipes, applied in the direction of manufacturing tools, heat treatment equipment, furnaces, etc., to achieve the effects of long service life, good wear resistance, and improved wear resistance

Active Publication Date: 2014-10-15
宁波文而昌新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the research on the steel pipe piercing plug is still going on

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  • Piercing plug of steel pipe and preparation method thereof
  • Piercing plug of steel pipe and preparation method thereof
  • Piercing plug of steel pipe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Raw material preparation: Prepare raw materials according to the composition elements and mass percentages of the steel pipe perforated plug described in Example 1 in Table 1;

[0038] Forging: smelting and pouring the prepared raw materials to process them into the desired shape; the pouring temperature is 1450°C;

[0039] Annealing heat treatment: heat the processed steel pipe perforated plug to 920°C for annealing, keep it warm for 3 hours after annealing, and then take it out of the furnace at 330°C and air cool to obtain the finished product of steel pipe perforated plug;

[0040] Quenching and tempering: Heat the above-mentioned steel pipe piercing plug first finished product to 1140°C for quenching, heat it for 1-3 hours, then cool it to room temperature with oil, and then perform tempering treatment. After cooling to 60°C for 3 hours, perform a second tempering treatment at 530°C to obtain a steel pipe perforated plug.

Embodiment 2

[0042] Raw material preparation: prepare raw materials according to the composition elements and mass percentages of the steel pipe perforated plug described in Table 1, Example 2;

[0043] Forging: smelting and pouring the prepared raw materials, and processing them into the desired shape; the pouring temperature is 1420°C;

[0044] Annealing heat treatment: heat the processed steel pipe perforated plug to 930°C for annealing, keep it warm for 2 hours after annealing, and then take it out of the furnace at 350°C and air cool to obtain the finished product of steel pipe perforated plug;

[0045] Quenching and tempering: heat the above-mentioned steel pipe piercing plug first finished product to 1120°C for quenching, keep warm for 3 hours and then oil cool to room temperature, and then temper. The first tempering temperature is 530°C, keep warm for 2 hours, and cool After reaching 60°C, carry out the second tempering treatment at 520°C to obtain the steel pipe perforated plug. ...

Embodiment 3

[0047] Raw material preparation: prepare raw materials according to the composition elements and mass percentages of the steel pipe perforated plug described in Example 3 of Table 1;

[0048] Forging: smelting and pouring the prepared raw materials to process them into the desired shape; the pouring temperature is 1460°C;

[0049] Annealing heat treatment: heat the processed steel pipe perforated plug to 880°C for annealing, keep it warm for 4 hours after annealing, and then take it out of the furnace at 300°C and air cool to obtain the finished product of steel pipe perforated plug;

[0050] Quenching and tempering: Heat the above-mentioned steel pipe piercing plug first finished product to 1160°C for quenching, heat it for 1 hour and then cool it to room temperature with oil, and then perform tempering treatment. After reaching 60°C, perform a second tempering treatment at 540°C to obtain a steel pipe perforated plug.

[0051] The comparative example is the steel pipe perfo...

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Abstract

The invention relates to a piercing plug of a steel pipe and a preparation method thereof, and belongs to the field of metal materials. The piercing plug of the steel pipe comprises the following elements in percentage by mass: 0.25-0.35% of carbon (C), 12.5-14.0% of chrome (Cr), 0.3-0.8% of manganese (Mn), 0.1-0.3% of molybdenum (Mo), 0.3-0.5% of nickel (Ni), 0.3-0.4% of vanadium (V), 0.1-0.5% of tungsten (W), 0.15-0.2% of rhenium (Re), with the balance being iron (Fe) and inevitable impurities. The invention particularly relates to the preparation method of the piercing plug of the steel pipe. The piercing plug of the steel pipe has good mechanical property, and has the advantages of higher hardness, toughness and tensile strength and long service life when having higher wear resistance and temperature tolerance.

Description

technical field [0001] The invention relates to a perforated plug, in particular to a steel pipe perforated plug and a preparation method thereof, belonging to the field of metal materials. Background technique [0002] The piercing plug is a key process part in the production of steel pipes. Its quality and service life directly affect the efficiency of steel pipe production and the quality of steel pipes. However, during the piercing process, the piercing plug is in direct contact with the inner wall of the high-temperature tube blank, and the piercing plug and the tube blank rotate in reverse, and the force on the plug is complicated, and it needs to bear huge axial, radial, tangential stress and surface friction. Water cooling is required during or after pipe threading, and it needs to withstand cycles of mechanical fatigue and thermal fatigue under high temperature, high pressure, rapid cooling and rapid heating working conditions. Therefore, the perforated plug is eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/46C21D9/00
Inventor 吴满旵
Owner 宁波文而昌新材料科技有限公司
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