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Method for prolonging service life of piercing plug for seamless steel tubes

A technology of perforated plug and seamless steel pipe, applied in the direction of metal material coating process, coating, etc., can solve problems such as difficult to popularize and apply in a large range, and achieve easy control, good wear resistance and oxidation resistance, and service life. improved effect

Active Publication Date: 2012-07-04
南通东湖国际商务服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of studies have shown that by surface coating, boronizing, surfacing and other surface treatments on the plug, this surface treatment technology is economical and can effectively improve the service life of the plug, but due to the complexity of the transition layer between the coating and the substrate role, thus making it difficult for this surface treatment technology to be widely applied

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) Preparation of coated electrodes: NiCr alloy powder and Mo are selected as the bonding metal phase, and the chromium carbide powder is composed of 30 % Cr 3 C 2 、30 % Cr 7 C 3 and 40 % Cr 23 C 6 Composition, a mixture of NiCr alloy powder and metal Mo powder 25%; wherein metal Mo powder accounts for 0.5% of the mixture mass; nanometer Y 2 o 3 1%; chromium carbide powder 74%, after mixing the components, wet ball milling, vacuum drying, N 2 Sieve in the airflow, press and form under 5MPa high pressure, put into sintering at 1300°C, keep warm for 10h to make chromium carbide electrode, the particle size range of the chromium carbide powder is 170~190nm; the nanometer Y 2 o 3 The particle size range is 150~180nm.

[0018] 2) Preparation of the surface coating of the perforated plug: select the 16Cr2Ni4MoW material surface of the seamless steel pipe perforated plug to deposit a chromium carbide coating with high-energy micro-arc alloying equipment, and select...

Embodiment 2

[0020] 1) Preparation of coated electrodes: NiCr alloy powder and Mo are selected as the bonding metal phase, and the chromium carbide powder is Cr 3 C 2 , the mixture of NiCr alloy powder and metal Mo powder is 26%; the metal Mo powder accounts for 1% of the mixture mass; nanometer Y 2 o 3 2%; chromium carbide powder 72%, after mixing the components, wet ball milling, vacuum drying, N 2 Sieve in airflow, press to form under 5MPa high pressure, put into sintering at 1300°C, keep warm for 10h to make chromium carbide electrode, the particle size range of the chromium carbide powder is 180~200nm; the nanometer Y 2 o 3 The particle size range is 180~200nm.

[0021] 2) Preparation of the surface coating of the perforated plug: select the 15Cr2Ni3MoW material surface of the seamless steel pipe perforated plug to deposit chromium carbide coating with high-energy micro-arc alloying equipment, and select the semi-sintered chromium carbide electrode prepared in step 1 as the self-...

Embodiment 3

[0023] 1) Preparation of coated electrodes: NiCr alloy powder and Mo are selected as the bonding metal phase, and the chromium carbide powder is Cr 7 C 3 , a mixture of NiCr alloy powder and metal Mo powder 24.5%; the metal Mo powder accounts for 1% of the mixture; nanometer Y 2 o 3 0.5%; chromium carbide powder 75%, after mixing the components, wet ball milling, vacuum drying, N 2 Sieve in the air flow, press to form under 5MPa high pressure, put into sintering at 1300°C, keep warm for 10 hours to make chromium carbide electrode, the particle size range of the chromium carbide powder is 160~180nm; the nanometer Y 2 o 3 The particle size range is 180~200nm.

[0024] 2) Preparation of the surface coating of the perforated plug: select the 15Cr2Ni3MoW material surface of the seamless steel pipe perforated plug to deposit chromium carbide coating with high-energy micro-arc alloying equipment, and select the semi-sintered chromium carbide electrode prepared in step 1 as the s...

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Abstract

The invention relates to the technical field of seamless steel tube production, in particular to a method for prolonging the service life of a piercing plug for seamless steel tubes. Applying a high-energy micro-arc alloying into the technique for preparing coating on the surface of the piercing plug, the method comprises: firstly, preparing a metal yttrium modified chrome carbide electrode by a hot pressing sintering process; secondly, depositing a chrome carbide coating on the piercing plug by using high-energy micro-arc alloying equipment, controlling the argon flow and the output voltage, frequency, power and deposition time of the equipment in a coating preparation process, and thus, preparing the high-performance coating on the surface of the piercing plug and prolonging the service life of the piercing plug.

Description

technical field [0001] The invention relates to the technical field of seamless steel pipe production, in particular to a method for improving the service life of a seamless steel pipe perforation plug, which uses a high-energy micro-arc alloying method to prepare a rare earth Y CrC coating on the surface of a commonly used perforation plug, so that the plug can be used The service life is increased by more than 55%, and the cost is effectively saved. Background technique [0002] The piercing plug is one of the key tools with the largest consumption in the production of seamless steel pipes. Its service life has a direct impact on the output, quality and production cost of steel pipe products, and has received great attention from steel pipe companies. Since the plug is in contact with the high-temperature tube blank during the piercing process, it bears the combined stress of huge axial compressive stress, radial shear stress and surface friction, so it is easy to fail in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B22F3/16
Inventor 潘太军张保薛文龙陈德贵
Owner 南通东湖国际商务服务有限公司
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