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Method for preparing heat-resistant and abrasion-resistant composite guide carrier roller

A high temperature resistant and guiding technology, applied in other manufacturing equipment/tools, manufacturing tools, etc., can solve the problems of wear resistance, poor thermal shock resistance, short average life of guide rollers, etc., and achieve excellent resistance to high temperature oxidation and resistance. Wear performance, excellent hot hardness and high temperature wear resistance, the effect of strong process controllability

Active Publication Date: 2010-07-21
河北瑞兆激光再制造技术股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a guide roller parent body made of 40Cr steel rods, which is prepared by using a laser melting The preparation method of high-temperature wear-resistant composite guide rollers with good wear resistance and thermal shock resistance and long service life. The composite guide rollers produced by this method can meet the requirements of long-term continuous production under complex working conditions in steel rolling production

Method used

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  • Method for preparing heat-resistant and abrasion-resistant composite guide carrier roller
  • Method for preparing heat-resistant and abrasion-resistant composite guide carrier roller
  • Method for preparing heat-resistant and abrasion-resistant composite guide carrier roller

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Embodiment 1

[0024] First, 40Cr steel rods are used to prepare the guide roller matrix 1, with an outer diameter of 66mm, which is 4mm smaller than the outer diameter of the finished guide roller. Other dimensions are prepared according to the finished roller, and subjected to conventional heat treatment. Ni60 powder and Cr 3 C 2 The powder is mixed by mechanical mixing method to obtain Ni60+Cr 3 C 2 alloy powder. The mixing ratio of the alloy powder is: the particle size is 200 mesh, and the Cr with good fluidity after "spheroidization" treatment 3 C 2 The powder accounts for 30% of the total mass, and the Ni60 powder with a particle size of 200 mesh accounts for 70% of the total mass. Then use acetone cleaning agent to remove oil and rust on the surface of the carrier roller matrix 1 . Preheat the guide roller matrix 1 to be clad to 280°C. The method of pneumatic powder feeding is adopted, the powder transmission speed of the powder feeder is 120g / min, and the argon gas protection...

Embodiment 2

[0026] Firstly, 40Cr steel bar is used to prepare the guide roller matrix 1, the outer diameter is 86mm, and the outer diameter is 4mm smaller than the outer diameter of the finished guide roller, and the other dimensions are prepared according to the finished roller, and the conventional heat treatment is carried out by mechanical mixing method. Get Ni60+Cr 3 C 2 Alloy powder, the mixing ratio of the alloy powder is: the particle size is 200 mesh, and the Cr with good fluidity after "spheroidization" treatment 3 C 2 The powder accounts for 40% of the total mass, and the Ni60 powder with a particle size of 200 mesh accounts for 60% of the total mass. Then remove the oil stain and rust on the surface of the 40Cr steel guide roller parent body 1 with acetone cleaning agent. Preheat the guide roller matrix 1 to be clad to 300°C; adopt the method of pneumatic powder feeding, the powder transmission speed of the powder feeder is 120g / min, and the argon gas protection. Use a 6KW...

Embodiment 3

[0028] Firstly, 40Cr steel rods are used to prepare the guide roller body, with an outer diameter of 96mm, which is 4mm smaller than the outer diameter of the finished guide roller. Other sizes are prepared according to the finished roller and subjected to conventional heat treatment. Using mechanical mixing method to obtain Ni60+Cr 3 C 2 alloy powder. The mixing ratio of the alloy powder is: the particle size is 200 mesh, and the Cr with good fluidity after "spheroidization" treatment 3 C 2 The powder accounts for 40% of the total mass, and the Ni60 powder with a particle size of 200 mesh accounts for 60% of the total mass. Then use acetone cleaning agent to remove the oil and rust on the surface of the 40Cr steel roller parent body. Preheat the parent body of the guide roller to be clad to 300°C; adopt the method of pneumatic powder feeding, the speed is 150g / min, and protect it with argon; scan through a 6KW high-power laser, the laser power is P=3200W, and the spot dia...

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Abstract

The invention relates to a method for preparing a guide carrier roller used on a steel rolling production line, in particular to the method for preparing a heat-resistant and abrasion-resistant composite guide carrier roller. The method comprises the following steps of: firstly, preparing a guide carrier roller matrix, and carrying out conventional heat treatment on the guide carrier roller matrix; mixing Ni60 powder and Cr3C2 powder to prepare alloy powder; removing oil stains on the surface of the guide carrier roller matrix by using a cleaning agent; preheating the guide carrier roller matrix to be molten and coated; melting, coating and scanning the guide carrier roller matrix with a laser by adopting a method for pneumatically delivering powder; melting and coating the alloy powder on the surface of the guide carrier roller matrix for two times; and grinding the molten and coated guide carrier roller with a cylindrical grinder according to diameter dimensions to prepare the finished product composite guide carrier roller of which the surface is provided with a metal ceramic alloy abrasion-resistant layer. The method for preparing the composite guide carrier roller has high controllability of technological process, meets the requirements of continuous production on steel rolling lines under severe working conditions, saves a great number of precious heat-resistant stainless steel alloy materials and has the advantages of low price, high productivity and the like.

Description

technical field [0001] The invention relates to a preparation method of a guide roller used in a steel rolling production line, in particular to a preparation method of a high-temperature wear-resistant composite guide roller. Background technique [0002] In metallurgical equipment, the guide rollers on the rolling line are vulnerable parts. During the steel rolling process, the temperature reaches 1100℃~900℃, and the steel moves at a high speed. The surface of the idler roller is subjected to the rolling and high temperature wear of the high temperature steel plate and the high temperature abrasive wear of abrasive materials such as oxide scale. At the same time, when the guide roller is working , In order to reduce the overall temperature of the idler roller and increase the life of the bearing, the method of forced water cooling is adopted. In addition to high temperature wear, the guide idler roller also has to bear the effect of severe cooling and heat. The currently ...

Claims

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Application Information

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IPC IPC(8): B23P23/04
Inventor 韩宏升付宇明
Owner 河北瑞兆激光再制造技术股份有限公司
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