Petroleum drilling machine winch brake hub material and preparation method thereof

A drilling rig winch and brake hub technology, which is applied in manufacturing tools, heat treatment process control, heat treatment equipment, etc., can solve the problems of high price, increased brake hub material cost, and soaring price of ferromolybdenum, and achieve low C content and good plasticity , good thermal fatigue resistance effect

Inactive Publication Date: 2009-06-24
RG PETRO MACHINERY GROUP
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  • Abstract
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Problems solved by technology

[0006] Although the above-mentioned Cr-Mo series brake hub material steel has good heat resistance and thermal fatigue resistance, long service life, and seldom has abnormal failure problems, the molybdenum-chromium element is a metal that is lacking in my country, so it is expensive, especially ferromolybdenum in recent years. The price soared, which increased the cost of brake hub materials a lot

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  • Petroleum drilling machine winch brake hub material and preparation method thereof

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[0031] Example: 4,000-meter drilling rig drawworks brake hub material and its manufacturing method.

[0032] Technical requirements for brake hub materials: Mechanical performance requirements: σs≥420MPa, σb≥620MPa, δ5≥15, ψ≥35, Akv≥40J.

[0033] The material used for the brake hub is a low-carbon Mn-Si-V-RE alloy, and its chemical composition (%) is selected as:

[0034] C Si mn V RE P S 0.22 0.35 1.6 0.18 0.03 0.020 0.018

[0035] The manufacture method of this brake hub material is:

[0036] 1. Steelmaking process: 5T basic electric arc furnace is used for smelting, oxidation smelting, and aluminum ingots are used for final deoxidation.

[0037] 2. Pouring process: 10T leak ladle pouring, tapping temperature 1620°C, sedation for 6 minutes pouring, pouring temperature 1570°C.

[0038] 3. Heat treatment process: normalizing: 920℃~930℃ air cooling

[0039] Quenching: 890℃~910℃ oil cooling or special medium cooling

[0040] ...

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Abstract

A kind of new material to produce brake hub of oil drill and the method to made it. The low carbon Mn-Si-V-RE alloy is used, the chemical components ( mass percent ) is : C: 0.10-0.30, Mn: 1.2-2.0, Si: 0.20-0.50, V: 0.05-0.20, Re: 0.010-0.040, P<=0.025, S<=0.025, the other is Fe. The manufacture method is: (1) steel-making: the liquid steel is smelt by arc furnace, Steel-making will be carried on according to the demand of the chemical components and routine technology. (2) Pouring: bottom pour ladle pouring is used, the tapping temperature is 1620+-20deg.C, the pouring temperature is 1560+-10deg.C. (3) heat-treatment: normalization: 920-940deg.C, air cooling; quenching: 890-920deg.C, oil cooling or cooling with special medium; Tempering: 540-560deg.C, air cooling, frequent quenching on surface: 870+-10 deg.C, the thickness of quenching layer is 3-5mm. The cost of the new material in this patent is low, and it own higher obdurability, abrasion resistance, heat tiredness resistance, and weldableness, and it can fulfill the wicked operating mode of the brake hub.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and relates to an oil drilling rig drawworks brake hub material and a manufacturing method thereof. Background technique [0002] The brake hub is an important part of the drawworks braking system of oil drilling rigs and workover rigs. It is related to the safety and reliability of the entire drilling rig and workover rig. The working conditions are very harsh. The surface of the brake hub will rub against the brake belt during braking. The instantaneous temperature can be as high as 900°C. Since the inner cavity of the brake hub is designed with a circulating water jacket for cooling, the surface temperature drops rapidly within 3 to 5 seconds after the brake is released. The periodic heating and cooling of the brake hub is subjected to alternating thermal stress, phase change stress and friction, and its normal failure mode is surface cracking (typical thermal fatigue characteristics) ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/12C22C33/04B22D27/04C21D1/28C21D1/18C21D1/10C21D11/00
CPCY02P10/25
Inventor 赵旭平张勇尹永晶刘洪泽王芬兰周国星
Owner RG PETRO MACHINERY GROUP
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