Steel tube piercing point and preparation method thereof

A technology for perforating plugs and steel pipes, which is used in metal rolling, manufacturing tools, metal rolling, etc., can solve the problems of wear resistance and temperature resistance not being significantly improved, and the service life of hot perforating plugs is not long. Good wearability, improved wear resistance, and the effect of increasing chromium content

Active Publication Date: 2013-06-05
宁波文而昌新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The new material improves the hardness, strength, toughness and other properties of the new material of the piercing plug to a certain extent, but its wear resistance and temperature resistance have not been significantly improved, so that the service life of the thermal piercing plug is not long

Method used

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  • Steel tube piercing point and preparation method thereof
  • Steel tube piercing point and preparation method thereof
  • Steel tube piercing point and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] According to Table 1, Example 1, the composition elements and mass percentages of steel pipe perforated plugs are determined. The composition elements and mass percentages of steel pipe perforated plugs have certain influence on the mechanical properties of the plugs, and the preparation process has a great influence on the mechanical properties of the finally formed perforated plugs. also have a greater impact.

[0037] Prepare steel pipe piercing plugs as follows:

[0038] Raw material preparation: The raw materials were prepared according to the composition elements and mass percentages of the steel pipe perforated plug described in Example 1 in Table 1.

[0039] Forging: smelting, pouring and processing the prepared raw materials into the desired shape.

[0040] Annealing heat treatment: heat the processed steel pipe perforated plug to 880°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 ...

Embodiment 2

[0043] Prepare steel pipe piercing plugs as follows:

[0044] Raw material preparation: prepare raw materials according to the composition elements and mass percentages of the steel pipe perforated plug described in Example 2 in Table 1.

[0045] Forging: smelting, pouring and processing the prepared raw materials into the desired shape.

[0046] Annealing heat treatment: heat the processed steel pipe perforated plug to 930°C for annealing, keep it warm for 3 hours after annealing, and then take it out of the furnace at 360°C and air cool to obtain the preliminary steel pipe perforated plug.

[0047] Surface oxidation treatment: first micro-processing the assembly surface of the finished steel pipe perforated plug, then heating to 980°C for high-temperature oxidation, and then holding the temperature at 580°C for 4 hours to obtain the finished steel pipe perforated plug.

Embodiment 3

[0049] Prepare steel pipe piercing plugs as follows:

[0050] Raw material preparation: The raw materials were prepared according to the composition elements and mass percentages of the steel pipe perforated plug described in Example 3 in Table 1.

[0051] Forging: smelting, pouring and processing the prepared raw materials into the desired shape.

[0052] Annealing heat treatment: heat the processed steel pipe perforated plug to 950°C for annealing, keep it warm for 4 hours after annealing, and then take it out of the furnace at 370°C and air cool to obtain the finished product of steel pipe perforated plug.

[0053] Surface oxidation treatment: first micro-process the assembly surface of the finished steel pipe perforated plug, then heat it to 1100°C for high-temperature oxidation, and then hold it at 610°C for 5 hours to obtain the finished steel pipe perforated plug.

[0054] Immediately, the steel pipe piercing plug samples prepared in Examples 1-3 of the invention were ...

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Abstract

The invention discloses a steel tube piercing point and a preparation method thereof. The invention solves the problems of insufficient wear resistance, short service life and the like in the steel tube piercing point in the prior art. The steel tube piercing point disclosed by the invention comprises the following component elements in percentage by mass: 0.28%-0.40% of carbon (C), 11.0%-12.2% of chromium (Cr), 1.7%-2.3% of manganese (Mn), 0.2%-0.6% of molybdenum (Mo), 0.25%-1.10% of silicon (Si), 0.8%-1.1% of nickel (Ni), 0.3%-0.5% of vanadium (V), 0.25%-0.35% of rhenium(Re) and the balance of iron (Fe) and inevitable impurities. The invention also provides a preparation method of the steel tube piercing point, which comprises the following steps: proportioning, forging, annealing heat treatment and surface oxidation treatment. The steel tube piercing point disclosed by the invention has the advantages of favorable wear resistance and long service life.

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): C22C38/58B21B25/00
Inventor 吴满旵
Owner 宁波文而昌新材料科技有限公司
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