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Continuous casting rolling-roller with good crack-resisting performance

A kind of crack-resistant and good technology, applied in the direction of rolls, metal rolling, manufacturing tools, etc., can solve the problems of low corrosion resistance, low toughness, accelerated crack development speed, etc.

Inactive Publication Date: 2003-06-11
村田宝林技研株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Also, in the method of performing nitriding treatment after overlay welding, chromium nitride is formed on the surface of Cr-based stainless steel to make it very hard, but its corrosion resistance is low and wear resistance decreases
In addition, since corrosion accelerates the growth rate of cracks, crack resistance cannot be sufficiently improved.
[0010] In addition, in the method of performing quenching heat treatment after overlay welding of Cr-based stainless steel, since the hardness is high but the toughness is low, the crack resistance is even worse, and the life due to cracks is shortened.

Method used

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  • Continuous casting rolling-roller with good crack-resisting performance
  • Continuous casting rolling-roller with good crack-resisting performance
  • Continuous casting rolling-roller with good crack-resisting performance

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Embodiment Construction

[0035] Embodiments of the present invention will be described with reference to the drawings. figure 1 It is a schematic diagram showing the state of the surface treatment of the roll barrel portion of the continuously cast roll having excellent crack resistance according to the present invention. and, Figure 4 It is a schematic view showing the structure of the surface of the roll barrel portion of the continuous casting roll having excellent crack resistance of the present invention.

[0036] First, emboss grooves with a pitch of 0.5 mm to 3 mm and a depth of 0.2 mm to 3 mm on the surface of the roller body, thereby forming roughly diamond-shaped embossing patterns or spiral embossing patterns that avoid the circumferential direction. The embossing 2 is used to form a fine concave-convex pattern on the surface of the roll body. Figure 4 The embossed surface 10 representing the barrel portion 9 of the continuous casting roll is formed in a fine concave-convex shape. Thi...

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Abstract

The present invention provides a continuously-cast roller with good craze crack resisting property, and is characterized by that on the partial surface of the roller body the grooves whose space length is 0.5 mm-3 mm and depth is 0.2 mm-3 mm are engraved so as to form diamond-shaped concave-convex pattern or spiral concave-convex pattern, then on the partial surface of said roller body the ceramics or glass coating melting layer are set. Said invention can utilize the reduction of heat quantity load inputted from casting band to inhibit the craze crack resulted from heat stress, at the same time it utilizes the preformed microfine concave-convex pattern on the partial surface of the roller to suppress development of craze crack so as to prolong life of roller.

Description

technical field [0001] The present invention relates to a continuous casting roll of continuous casting equipment, in particular to a roll capable of suppressing the development of sharp cracks by pre-forming fine convex and concave patterns on the surface of the roll while suppressing cracks due to thermal stress. , Continuous casting roll with good crack resistance. Background technique [0002] In the past, continuous casting units in steel production facilities such as figure 2 Like the structure of the continuous casting equipment shown in , the molten steel is injected from the ladle 3 through the tundish 4 into the crystallizer 5, and is sprayed from the water-cooled crystallizer inside the inner side and the external sprayer arranged between the continuous casting rolls 1 It is cooled by water (not shown in the figure), and it is pulled out from the exit side while being cooled, and the material to be cast, that is, a cast strip is continuously produced. [0003] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/46B21B27/02B22D11/128
Inventor 田代久郎王卫中村田光生
Owner 村田宝林技研株式会社