Unlock instant, AI-driven research and patent intelligence for your innovation.

High speed steel compound roll and manufacture method thereof

A composite roll and high-speed steel technology, applied in the direction of roll, metal rolling, metal rolling, etc., can solve the problems of high roll production cost, coarse roll core structure, poor competitiveness, etc., and achieve shortened production cycle, cast state High hardness and high production efficiency

Inactive Publication Date: 2012-05-30
BEIJING UNIV OF TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned high-speed steel rolls all contain more expensive alloying elements such as tungsten, molybdenum, vanadium, niobium, cobalt, etc., which lead to high production costs of the rolls, poor competitiveness for popularization, and high-speed steel rolls. Energy, pollute the environment, and during the process of high temperature heating and heat preservation, the structure of the roll core will be coarsened, and the performance of the roll core will decrease, which will lead to roll breakage accidents during the use of the roll and affect the normal operation of the rolling mill

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High speed steel compound roll and manufacture method thereof
  • High speed steel compound roll and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The outer layer (2) and roll core (1) of the high-speed steel composite roll are smelted in a 500-kg and 1500-kg electric furnace respectively, and compositely formed by centrifugal casting. The process steps are:

[0035] 1) Roll outer layer (2) Molten steel melting of high speed steel

[0036] 1. ordinary steel scrap, ferrochrome and ferromolybdenum are mixed and put into the furnace for heating and melting according to the composition requirements of the composite roll outer layer (2) of claim 1, and 0.1% calcium-silicon alloy is added for pre-deoxidation after molten steel is melted;

[0037] ② After adjusting the composition before the furnace, the temperature is raised to 1543°C, aluminum is added for deoxidation and alloying, and then ferrovanadium, ferroboron and ferrotitanium are added in sequence, and the molten steel is released when the temperature reaches 1546°C;

[0038] ③ Place the magnesium-nickel alloy at the bottom of the ladle, and alloy the molten st...

Embodiment 2

[0045] The outer layer (2) and roll core (1) of the high-speed steel composite roll are smelted in a 500-kg and 1500-kg electric furnace respectively, and compositely formed by centrifugal casting. The process steps are:

[0046] 1) Roll outer layer (2) Molten steel melting of high speed steel

[0047] 1. ordinary steel scrap, ferrochrome and ferromolybdenum are mixed and put into the furnace for heating and melting according to the composition requirements of the composite roll outer layer (2) of claim 1, and 0.3% calcium-silicon alloy is added for pre-deoxidation after molten steel is melted;

[0048] ② After adjusting the composition before the furnace, the temperature is raised to 1573°C, aluminum is added for deoxidation and alloying, and then ferrovanadium, ferroboron and ferrotitanium are added in sequence, and the molten steel is released when the temperature reaches 1578°C;

[0049] ③ Place the magnesium-nickel alloy at the bottom of the ladle, and alloy the molten st...

Embodiment 3

[0056] The outer layer (2) and the roll core (1) of the high-speed steel composite roll are smelted in an electric furnace of 750 kg and 3000 kg respectively, and are compositely formed by centrifugal casting. The process steps are:

[0057] 1) Roll outer layer (2) Molten steel melting of high speed steel

[0058] 1. ordinary steel scrap, ferrochrome and ferromolybdenum are mixed and put into the furnace for heating and melting according to the composition requirements of the composite roll outer layer (2) of claim 1, and 0.2% calcium-silicon alloy is added for pre-deoxidation after molten steel is melted;

[0059] ② After adjusting the ingredients before the furnace, the temperature is raised to 1562°C, adding aluminum for deoxidation and alloying, and then adding ferrovanadium, ferroboron and ferrotitanium in sequence, and the molten steel is released when the temperature reaches 1565°C;

[0060] ③ Place the magnesium-nickel alloy at the bottom of the ladle, and alloy the mo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
strengthaaaaaaaaaa
strengthaaaaaaaaaa
strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high speed compound roll, comprising an outer layer and a roller core. The outer layer comprises the following chemical components by weight percent: 0.5-0.8% of C, 1.5-1.8% of B, 8.0-11.0% of Cr, 4.0-5.5% of Mo, 1.0-1.2% of V, 2.0-2.5% of Al, 0.1-0.4% of Ni, 0.04-0.08% of Mg, 0.06-0.15% of Ti, less than 0.7% of Si, less than 0.4% of Mn, less than 0.04% of S, less than 0.05% of P and the balance of Fe. The roller core is ductile iron. The invention also discloses a manufacture method of the compound roller, comprising the following steps of: respectively smelting the outer layer and the roller core of the compound roller in an electric furnace, and carrying out compound molding by using a centrifugal casting method. The compound roller has the advantages of no need of high temperature heat treatment, simple process, low energy consumption, high hardness of the roller surface, good wear resistance, strong intensity of the roller core, safe and reliable use, long service life and low production cost. The application of the high speed compound roller has good economic benefits.

Description

technical field [0001] The invention relates to a high-speed steel roll and a preparation method thereof, in particular to a high-speed steel composite roll and a preparation method thereof, and belongs to the technical field of steel rolling. Background technique [0002] Rolls are metallurgical spare parts with large consumption in steel rolling production. The quality of the rolls directly determines the surface quality, dimensional accuracy and production efficiency of the rolling mill. It improves the performance of the rolls, prolongs the service life of the rolls, and reduces the production cost of the rolls. It is an important topic that rolling steel users and roll manufacturing companies continue to pay attention to. Among them, high-carbon high-vanadium high-speed steel rolls have attracted the attention of steel rolling companies due to their high hardness and good wear resistance, and have been widely used. [0003] Chinese invention patent CN101220440 discloses...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B21B27/02C22C38/54B22D1/00B22D13/02C21D9/38
Inventor 符寒光雷永平杜忠泽蒋志强
Owner BEIJING UNIV OF TECH