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Manufacturing method of spray formed high-vanadium high-speed steel composite roller

A technology of composite roll and manufacturing method, which is applied in the field of steel rolling, can solve problems such as uneven structure of the outer layer, element segregation, etc., and achieve the effect of uniform structure, fine grain, and avoiding element segregation

Inactive Publication Date: 2012-01-18
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of uneven outer structure and element segregation produced in the manufacturing process of existing high-speed steel composite rolls

Method used

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  • Manufacturing method of spray formed high-vanadium high-speed steel composite roller
  • Manufacturing method of spray formed high-vanadium high-speed steel composite roller
  • Manufacturing method of spray formed high-vanadium high-speed steel composite roller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Main chemical composition (wt%, the balance is Fe):

[0035] material C V Si Cr Mo mn P S outer layer 2.5 10.00 1.60 5.50 1.4 0.50 0.03 0.02

[0036] 1) High speed steel molten steel smelting

[0037] According to the quality requirements of the sprayed metal and the size conditions of the base metal, etc., select the capacity of the 20L melting crucible. Place the crucible in the induction coil, and fill the pores with magnesia for consolidation. Tilt the crucible, slowly put the master alloy ingot into the melting crucible and put it upright to avoid scratching the crucible.

[0038] Close the vacuum port of the equipment and turn on the pump to pump to 10 -3 Mpa, filled with argon to the working pressure. Then apply medium-frequency alternating current to the coil and heat it to 1500°C to melt;

[0039] 2) The preheating process of the roller core

[0040]According to the requirements of the preparation process, the ba...

Embodiment 2

[0056] Main chemical composition (wt%, the balance is Fe):

[0057] material C V Si Cr Mo mn P S outer layer 1.76 9.00 1.56 5.96 1.32 0.56 0.03 0.02

[0058] 2) High speed steel molten steel smelting

[0059] According to the quality requirements of the sprayed metal and the size conditions of the base metal, etc., select the capacity of the 20L melting crucible. Place the crucible in the induction coil, and fill the pores with magnesia for consolidation. Tilt the crucible, slowly put the master alloy ingot into the melting crucible and put it upright to avoid scratching the crucible.

[0060] Close the vacuum port of the equipment and turn on the pump to pump to 10 -3 Mpa, filled with argon to the working pressure. Then apply medium-frequency alternating current to the coil and heat it to 1500°C to melt;

[0061] 2) The preheating process of the roller core

[0062] According to the requirements of the preparation process, the ...

Embodiment 3

[0078] Main chemical composition (wt%, the balance is Fe):

[0079] material C V Si Cr Mo mn P S outer layer 1.70 8.00 1.40 5.00 1.30 0.60 0.03 0.02

[0080] 3) High speed steel molten steel smelting

[0081] According to the quality requirements of the sprayed metal and the size conditions of the base metal, etc., select the capacity of the 20L melting crucible. Place the crucible in the induction coil, and fill the pores with magnesia for consolidation. Tilt the crucible, slowly put the master alloy ingot into the melting crucible and put it upright to avoid scratching the crucible.

[0082] Close the vacuum port of the equipment and turn on the pump to pump to 10 -3 Mpa, filled with argon to the working pressure. Then apply medium-frequency alternating current to the coil and heat it to 1500°C to melt;

[0083] 2) The preheating process of the roller core

[0084] According to the requirements of the preparation process, the ...

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Abstract

The invention belongs to the technical field of rolled steel, and in particular relates to a manufacturing method of a spray formed high-vanadium high-speed steel composite roller. The high-vanadium high-speed steel comprises the following chemical components in percentage by mass: 1.7 to 1.8 percent of C, 1.2 to 1.6 percent of Si, 5.0 to 6.0 percent of Cr, 1.2 to 1.4 percent of Mo, 0.5 to 0.6 percent of Mn, 8.0 to 10.0 percent of V, and the balance of Fe; and the roller core is made of ball milling cast iron. The invention also discloses a preparation method of the radiation roller. The preparation method comprises the following steps of: preheating the roller core to a certain temperature by using an induction coil, simultaneously smelting the high-speed steel of the outer layer in a vacuum induction furnace, atomizing the high-speed steel molten metal flow by adopting a spray forming method and using nitrogen, and depositing the molten metal on the rotary roller core for compounding. The outer texture of the compound roller is uniform, rough eutectic carbides and texture segregation are eliminated, and good metallurgical combination is formed between the roller core and a spraylayer; and the spray formed compound roller has high hardness on the surface, good abrasion resistance, improved fatigue performance and longer service life, and has higher and better economic benefits as equipment is mature.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a method for manufacturing a spray-formed high-vanadium high-speed steel composite roll. Background technique [0002] The iron and steel industry is an important pillar industry for the development of the national economy and national modernization, a symbol of social civilization, and an important strategic material. Since the reform and opening up, my country's steel industry has taken the lead, ranking first in the world in steel output for 15 consecutive years, ensuring and promoting the rapid development of automobiles, ships, construction, home appliances and national defense. The roll is an important and key component of steel rolling, and plays a very important role in the steel industry chain. It is crucial to the development of steel rolling technical equipment and variety quality. With the rapid development of the iron and steel metallurgical indus...

Claims

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Application Information

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IPC IPC(8): B22F3/115C22C38/24C22C38/34C22C38/36C21D9/38C21D1/18
Inventor 葛昌纯郭志家张宇徐轶邱成杰
Owner UNIV OF SCI & TECH BEIJING
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