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A guide plate for primary piercing for multifunctional piercing and rolling mill

A multi-functional technology for piercing and rolling mills, which is applied in the field of primary piercing guide plates for multi-functional piercing and rolling mills. It can solve the problems of high chromium guide plates such as low service life, failure to meet the use requirements, and high price, and achieve comprehensive performance improvement and resistance to cold and heat fatigue. Good performance and good tissue stability

Active Publication Date: 2017-08-29
LIAOCHENG ANTAI PETROLEUM MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high chromium guide plate has a low service life and cannot meet the requirements of use; the high nickel guide plate has a good service life, but it is expensive and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A primary piercing guide plate for a multifunctional piercing and rolling mill, the material of which includes: C: 2%, Si: 1%, Mn: 0.5%, Cr: 26%, Ni; 9%, Mo; 0.6%, Ti0. 4%, P0.02%, S<0.025%, and the balance is iron. According to this ratio, compared with the high-chromium guide plate and high-nickel guide plate obtained by the above-mentioned manufacturing method, the structure stability is good, and the high-temperature Good strength, toughness, cold and heat fatigue resistance; increased strength and hardness, good thermal strength and wear resistance. The structure of the guide plate is dense, the grains are refined, and there is no casting defect; the particles of the carbide strengthening phase are fine and evenly distributed, and the comprehensive performance of the guide plate is greatly improved.

Embodiment 2

[0022] Embodiment 2: a kind of multi-functional piercing and rolling mill is used once piercing guide plate, and its material comprises according to mass percentage:

[0023] C: 1.9%, Si: 0.8%, Mn: 0.3, Cr: 25%, Ni; 8%, Mo; 0.5%, Ti: 0.3%, P<0.035%, S<0.035%, the balance is iron, according to Compared with the high-chromium guide plate and high-nickel guide plate of the prior art, the guide plate obtained by using the above-mentioned manufacturing method has good structural stability, good high-temperature strength, toughness, and good cold and heat fatigue resistance; the strength and hardness are improved, and the thermal strength , Good wear resistance. The structure of the guide plate is dense, the grains are refined, and there is no casting defect; the particles of the carbide strengthening phase are fine and evenly distributed, and the comprehensive performance of the guide plate is greatly improved.

Embodiment 3

[0024] Embodiment 3: a kind of multi-functional piercing and rolling mill is used once piercing guide plate, and its material comprises according to mass percentage:

[0025] C: 2.1%, Si: 1.2%, Mn: 0.6%, Cr: 27%, Ni; 10%, Mo; 0.7%, Ti: 0.5%, P<0.035%, S<0.035%, the balance is iron, According to this ratio, compared with the high-chromium guide plate and high-nickel guide plate of the prior art, the guide plate obtained by using the above-mentioned manufacturing method has good structural stability, good high-temperature strength, toughness, and good cold and heat fatigue resistance; the strength and hardness are improved, and the thermal strength Good durability and wear resistance. The structure of the guide plate is dense, the grains are refined, and there is no casting defect; the particles of the carbide strengthening phase are fine and evenly distributed, and the comprehensive performance of the guide plate is greatly improved.

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Abstract

The invention provides a first perforation guide plate for a multifunctional piercing mill. The first perforation guide plate comprises, by mass, 1.9-2.1% of C, 0.8-1.2% of Si, 0.3-0.6% of Mn, 25-27% of Cr, 8-10% of Ni, 0.5-0.7% of Mo, 0.3-0.5% of Ti, below 0.035% of P, below 0.035% of S, and the balance of Fe. The matrix structure of the guide plate is austenite, so the guide plate has good structure stability, good high temperature strength, toughness and good cold and hot fatigue resistance; and high chromium and high silicon guarantee that the guide plate have high oxidation resistance, high carbon content and the addition of chromium and molybdenum alloy guarantee that the matrix of the guide plate have enough carbide strengthening phase, improved strength and hardness, and good hot strength and wear resistance. A reasonable making technology guarantees that the guide plate have the characteristics of structure compactness, refined crystal grain and no casting defects; and the particles of the carbide strengthening phase are fine and are uniformly distributed, so the comprehensive performances of the guide plate are greatly improved.

Description

technical field [0001] The invention relates to the technical field of high-alloy material heating, in particular to a primary perforation guide plate for a multifunctional piercing and rolling mill in the field of seamless steel pipe production. Background technique [0002] The guide plate of the piercing machine is the main deformation tool in the production of seamless steel pipes. It is used in very harsh working environments, has a low service life and high price, and has a great impact on the normal production and production costs of seamless steel pipes. At present, steel pipe factories generally use Cr32Ni5 high chromium guide plates and high nickel guide plates containing about 50% nickel. The high chromium guide plate has a low service life and cannot meet the requirements of use; the high nickel guide plate has a good service life, but is expensive and expensive. Contents of the invention [0003] In order to solve the above technical problems, the present inv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/56B21B39/16
Inventor 高万峰石满鹰宋来柱周建超李万明
Owner LIAOCHENG ANTAI PETROLEUM MACHINERY
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