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High-strength and high-toughness steel for petroleum lifting ring and preparation method thereof

A petroleum and high-strength technology, applied in the field of steel materials, can solve the problems of poor low-temperature toughness and increase the cost of steel for petroleum lifting rings, and achieve the effects of improving hardenability, tempering stability, and tempering brittleness resistance.

Active Publication Date: 2021-02-09
CENT IRON & STEEL RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above analysis, the present invention aims to provide a high-strength steel for petroleum suspension rings and its preparation method to solve the problem of poor low-temperature toughness of existing steel for petroleum suspension rings, without increasing the steel used for petroleum suspension rings on the basis of satisfying mechanical properties. cost of steel

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  • High-strength and high-toughness steel for petroleum lifting ring and preparation method thereof
  • High-strength and high-toughness steel for petroleum lifting ring and preparation method thereof
  • High-strength and high-toughness steel for petroleum lifting ring and preparation method thereof

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preparation example Construction

[0046] The present invention also provides a preparation method of steel for high-strength and tough petroleum suspension rings, comprising:

[0047] Step 1: smelting the raw material of steel for high-strength and tough petroleum suspension rings to obtain steel ingots;

[0048] Step 2: Forging the steel ingot into a cylindrical billet for the first time;

[0049] Step 3: Continue to perform free forging on the cylindrical billet several times to obtain the required high-strength and tough steel for oil rings.

[0050] Specifically, in step 2, before the initial forging, in order to ensure that the steel ingot is thoroughly heated, it is necessary to heat the steel ingot to a temperature of 1100° C. to 1150° C. and keep it warm for more than 1 hour. Considering that if the heating temperature is too high, it will cause overburning and overheating. When the temperature is too low, the deformation resistance of the steel is large, and the plasticity is relatively poor, which i...

Embodiment 1

[0058] As shown in Table 1, the chemical composition (mass percentage%) of the steel for petroleum suspension rings in this embodiment is: C: 0.16, Si: 1.09, Mn: 3.70, S: 0.003, P: 0.003, Cr: 0.04, Mo: 0.02, V: 0.02, Ti: 0.02, and the balance is Fe and unavoidable impurities. The cross-sectional dimensions of the prepared steel for petroleum suspension rings are Φ30mm and Φ110mm.

[0059] The specific steps and process parameters are as follows:

[0060] Step 1: smelting the raw material of steel for high-strength and tough petroleum suspension rings to obtain steel ingots;

[0061] Step 2: Heating the steel ingot to a temperature of 1150°C and holding it for 1.5 hours, then forging it into a cylindrical billet for the first time;

[0062] Step 3: Carry out multiple free forgings on the cylindrical billet to obtain the required steel for oil lifting rings. The forging ratio is 10 during the forging process.

Embodiment 2

[0064] As shown in Table 1, the chemical composition (mass percentage%) of the steel for petroleum suspension rings in this embodiment is: C: 0.10, Si: 0.85, Mn: 3.50, S: 0.003, P: 0.003, Cr: 0.02, Mo: 0.03, V: 0.03, Ti: 0.02, and the balance is Fe and unavoidable impurities. The cross-sectional dimensions of the prepared steel for petroleum suspension rings are Φ60mm and Φ110mm.

[0065] The specific steps and process parameters are as follows:

[0066] Step 1: smelting the raw material of steel for high-strength and tough petroleum suspension rings to obtain steel ingots;

[0067] Step 2: Heating the steel ingot to a temperature of 1100°C and holding it for 1.2 hours, then forging it into a cylindrical billet for the first time;

[0068] Step 3: Carry out multiple free forgings on the cylindrical billet to obtain the required steel for oil lifting rings. During the forging process, the forging ratio is 10.

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Abstract

The invention discloses high-strength and high-toughness steel for a petroleum lifting ring and a preparation method thereof, belongs to the technical field of steel materials, and solves the problemof poor low-temperature toughness of steel for the petroleum lifting ring in the prior art. The steel for the petroleum lifting ring comprises the following chemical components including, by mass, 0.10%-0.20% of C, 0.80%-1.20% of Si, 3.00%-4.00% of Mn, 0.01%-0.05% of Cr, 0.01%-0.05% of Mo, less than or equal to 0.01% of P, less than or equal to 0.005% of S, one or two of Ti and V and the balance Fe and inevitable impurities, wherein the sum of the Ti and the V is 0.010%-0.060%. The high-strength and high-toughness steel for the petroleum lifting ring is prepared by the preparation method and has high strength, excellent low-temperature impact performance and excellent comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of iron and steel materials, and in particular relates to a high-strength and tough steel for petroleum suspension rings and a preparation method thereof. Background technique [0002] In recent years, as my country's oil resources have been exhausted under conventional working conditions, oil exploitation has shifted to more severe working conditions. Under low temperature environment, the problem of low temperature brittle fracture of oil drilling and production materials is gradually exposed, which seriously affects the efficiency, cost and safety of oil recovery. Therefore, in the face of this new situation, very high requirements are put forward for the materials of oil drilling and production equipment, which need to have better low temperature service performance. The oil lifting ring is a key stress-bearing connector in the oil drilling rig equipment. Its main function is to lift, and it plays a piv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/22C22C38/24C22C38/28C22C38/38B21J5/00C21D8/00
CPCC22C38/02C22C38/38C22C38/22C22C38/24C22C38/28B21J5/002C21D8/005C21D2211/008C21D2211/001
Inventor 梁小凯杨超黄涛崔建英刘清友王淼孙新军陈玉玺贾书君童帅
Owner CENT IRON & STEEL RES INST
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