Wear-resistant guide disc coil for seamless steel pipe mill

A technology of a tube rolling mill and a guide plate, applied in the field of key parts, can solve the problems of poor wear resistance, short life and high cost, and achieve high temperature creep strength and oxidation resistance, long service life, and high excess steel. Effect

Inactive Publication Date: 2012-12-19
蔡宏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Their common disadvantages are poor wear resistance, poor impact resistance, easy to break, short service life, and must be repaired after a certain period of time, and the number of times they can be repaired and reused is small. The above defects lead to frequent replacement of the steel pipe rolling guide ring , leading to problems such as large energy consumption, low efficiency, and high cost

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] A wear-resistant guide coil for a pipe mill, the weight percent (%) of each element is: C is 3.0-3.90, Si is 0.20-0.60, Mn is 0.35-0.85, Mo is 0.20-0.60, P is 0- 0.03, S is 0-0.03, Cu is 0.30-0.75, V is 0.20-0.50, RE is 0.02-0.03, and the balance is Fe.

[0013] In the present invention, the reasons for limiting the range of elemental components are as follows:

[0014] C: It is the forming element of carbide, and in wear-resistant cast iron, the composition, shape, distribution and quantity of carbide are the key factors that determine its performance. In the hypoeutectic range, as the carbon content increases, the number of carbides increases correspondingly, the hardness increases, but the brittleness increases and the toughness decreases. When the carbon content is too low, the carbides in the material decrease, which is unfavorable to the wear resistance of cast iron. Take into account the control of carbon content at 3.0-3.9%.

[0015] Si: It can improve the ca...

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Abstract

The invention discloses a wear-resistant guide disc coil for a seamless steel pipe mill. The wear-resistant guide disc coil comprises the following elements of: by weight, 3.0-3.90% of C, 0.20-0.60% of Si, 0.35-0.85% of Mn, 0.20-0.60% of Mo, 0-0.03% of P, 0-0.03% of S, 0.30-0.75% of Cu, 0.20-0.50% of V, 0.02-0.03% of RE, and the balance being Fe. According to the invention, based on the adoption of a wear-resistant alloy nodular cast iron material, a proper amount of microalloying elements of V and Cu is added so as to refine steel's grain size and improve cast structures. Therefore, high-temperature creep strength and antioxidation capacity of the product are raised, and production requirements of a pipe mill are satisfied. The product provided by the invention is widely applied in various pipe mill guiding equipment.

Description

technical field [0001] The invention relates to a key part of a seamless steel tube rolling mill, in particular to a guide ring in a guide disc device for a seamless steel tube rolling mill. Background technique [0002] The seamless steel pipe guide plate device is the key equipment on the domestic seamless steel pipe rolling mill. From the perspective of the current domestic hot-rolled pipe production process: from the acceptance of the tube billet—shearing—heating—piercing—rolling—extrusion—cooling— Collection—pickling—inspection—collection—measurement—hot rolled pipe, piercing, pipe rolling and extrusion are the key processes of seamless pipe rolling, and guide rings are used in the key processes of piercing, pipe rolling and extrusion , the guide ring device mainly plays the role of straightening and guiding in the steel pipe rolling process. Due to the complex working conditions of the steel pipe rolling process, the material of the guide ring has high requirements for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10B21B39/14
Inventor 蔡宏
Owner 蔡宏
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