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Preparation method of liners for rolling mills

A liner and rolling mill technology, which is applied in the field of preparation of rolling mill liners, can solve the problems that the production efficiency and reliability of the rolling mill cannot be guaranteed, the ideal service life is not reached, and the cost performance is low, and the ideal anti-wear performance and excellent corrosion resistance can be achieved. And anti-fatigue performance, the effect of improving the service life

Active Publication Date: 2018-03-09
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual use, it is found that although the life of the rolling mill liner has been improved after the improvement, the cost is high, the cost performance is low, the ideal service life has not been reached, and the production efficiency and reliability of the rolling mill cannot be guaranteed.

Method used

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  • Preparation method of liners for rolling mills
  • Preparation method of liners for rolling mills
  • Preparation method of liners for rolling mills

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 As shown, the 45 steel plate is processed according to the drawing of the lining plate, and the working surface of the lining plate contacting the moving parts is reduced by 1mm according to the size to continue processing. The mass percentage of the chemical composition is: C 0.1%, Si 1.0%, Cr 14%, Co 1.6%, Mn 1.2%, the balance is Fe, and the particle size of the powder is 125-325 mesh; the above alloy powder is mixed with a three-dimensional powder mixer Mix for 3 hours and mix evenly; combine the processed liners of the same size in pairs, and fix the two liners together with bolts through the countersunk holes on the liners so that the non-working surfaces of the liners are in contact (such as figure 1 and figure 2 shown in the figure); the countersunk holes of the installed bolts are covered with good quick-drying powder and dried to ensure that the countersunk holes and bolts are not damaged when the laser cladding alloy powder is applied; the f...

Embodiment 2

[0027] Process the 45-steel plate according to the drawing of the liner plate, and continue to process the working surface of the liner plate in contact with the moving parts according to the size reduced by 1mm. The mass percentage is: C 0.13%, Si 1.5%, Cr 16%, Co 1.7%, Mn 1.6%, the balance is Fe, the particle size of the powder is 125-325 mesh; use a three-dimensional powder mixer to mix the above alloy powder for 3 hours , mixed evenly; combine the processed liners of the same size in pairs, and use bolts to fix the non-working surfaces of the two liners together through the countersunk holes on the liners; in the countersunk holes of the installed bolts Coat with good quick-drying powder and dry to ensure that the countersink holes and bolts are not damaged during laser cladding alloy powder; place the fixed two combined liners on a high-power semiconductor laser processing machine tool, and use preset powder coating method, evenly spread the alloy powder on the working su...

Embodiment 3

[0029] Process the 45-steel plate according to the drawing of the liner plate, and continue to process the working surface of the liner plate in contact with the moving parts according to the size reduced by 1mm. The mass percentage is: C 0.12%, Si 1.3%, Cr 16%, Co 1.7%, Mn 1.6%, the balance is Fe, and the particle size of the powder is 125-325 mesh; use a three-dimensional powder mixer to mix the above alloy powder for 3 hours , mixed evenly; combine the processed liners of the same size in pairs, and use bolts to fix the non-working surfaces of the two liners together through the countersunk holes on the liners; in the countersunk holes of the installed bolts Coat with good quick-drying powder and dry to ensure that the countersink holes and bolts are not damaged during laser cladding alloy powder; place the fixed two combined liners on a high-power semiconductor laser processing machine tool, and use preset powder coating method, evenly spread the alloy powder on the workin...

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Abstract

Disclosed is a preparation method of liners for rolling mills. According to the preparation method, after the process of processing 45# steel plates according to drawings, size of working surfaces ofcontact moving parts of the liners is reduced by 1mm and then further processing is carried out; alloy powder is prepared from, by mass percent, 0.1-0.13% of C, 1.0-1.5% of Si, 14-16% of Cr, 1.6-1.7%of Co, 1.2-1.6% of Mn and the balance being Fe; every two processed liners of the same dimension are combined by the fixing way of keeping non-working surfaces of every two liners contacting; the alloy metal powder is spread in advance, and is subjected to metallurgical reaction with the basic metal of the liners through high-powder semi-conductor laser high-energy optical bean scanning, and thena reinforced alloy layer is formed on the working surface of each liner; finally, the reinforced alloy layer is subjected to finish machining through a surface grinder. The preparation method needs simple process and causes no pollution; the reinforced liners prepared by the method have the advantages of long service life and low cost.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a preparation method of a liner plate for a rolling mill. Background technique [0002] During the working process of the rolling mill, the bearing capacity of the whole rolling mill is very large, and during the process of rolling steel plates by the rolling mill, the moving parts in the rolling mill wear very large on the fixed lining plate on the rolling mill archway. Due to the poor wear resistance of conventional liners, they are frequently replaced in actual use, which increases downtime and enterprise costs. Looking for a liner for rolling mills with more wear resistance, good performance, and low price and its preparation method is of great importance for improving the production of rolling mills in iron and steel enterprises. Benefits, reducing downtime loss is of great significance. [0003] In recent years, in order to improve the service life of rolling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C38/30C22C38/38C22C38/04C22C38/02B23P15/00
CPCB23P15/00C22C38/02C22C38/04C22C38/30C22C38/38C23C24/103
Inventor 付宇明齐童郑丽娟
Owner YANSHAN UNIV
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