Electromagnetic centrifugal casting quick-cutting steel composite roller operational layer material

A technology of centrifugal casting and composite rolls, applied in the field of metallurgical rolls, can solve the problems of poor wear resistance, affecting service performance, microstructure segregation, etc., and achieve the effects of avoiding macrosegregation, improving overall performance, and reducing content

Active Publication Date: 2008-10-01
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0009] Chinese patent 93103678.X is a composite roll and its production method invented by Hitachi Metals Co., Ltd. The composition of cast iron in the working layer is by weight: 1.0-3.0% C, 2.0% or less Si, 2.0% or less Mn, 2.0-15.0% Cr, 10.0% or less Mo, 2.0-8.0% V, and the rest are Fe and unavoidable impurities. The invented material does no

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  • Electromagnetic centrifugal casting quick-cutting steel composite roller operational layer material
  • Electromagnetic centrifugal casting quick-cutting steel composite roller operational layer material
  • Electromagnetic centrifugal casting quick-cutting steel composite roller operational layer material

Examples

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Example Embodiment

[0039] See Table 1 for examples of the present invention.

[0040] Table 1 Unit: mass percentage

[0041]

[0042] During the centrifugal casting and solidification of the working layer of the roller body, an electromagnetic field with a magnetic induction intensity of 0.21T-0.30T is applied, and V is replaced by W. The carbides can be evenly distributed without segregation, and the structure is dense and small. The performance is better than ordinary centrifugation. Cast high-speed steel rolls, in which: wear resistance and impact toughness are increased by more than 30%, and accident resistance is greatly improved.

[0043] by figure 1 , figure 2 It can be seen that the heat treatment process is unchanged, and a large amount of black carbides are precipitated under the conditions of centrifugal casting without electromagnetic field; under the conditions of 0.22T electromagnetic field centrifugal casting, a large number of dispersed white fine carbides are precipitated, and th...

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Abstract

The invention discloses a material of the working layer of an electromagnetic centrifugal casting high speed steel composite roller, the composition mass percentage of which is as follows: 1.8 to 2.5 of C, 3 to 10.0 of W, 2 to 4 of Mo, 4.0 to 7.0 of Cr, 0.5 to 2 of V, 0.03 to 0.5 of RE, less than or equal to 1 of Si, less than or equal to 1 of Mn, and marginal Fe and unavoidable impurities; wherein, an electromagnetic field with the magnetic strength of 0.21T to 0.30T is applied during the centrifugal casting and solidifying process of the roll barrel working layer. The high carbon, high tungsten and high speed steel material of the invention can produce high carbon, high tungsten and high speed steel composite rollers by adopting an electromagnetic centrifugal casting technique and by replacing V with W, thereby not only eliminating the macroscopic segregation of a cast structure and effectively controlling the even distribution of MC carbide, but also obviously improving the service performance of the high speed steel composite roller.

Description

technical field [0001] The invention relates to the field of metallurgical rolls, in particular to an electromagnetic centrifugal casting high-speed steel composite roll working layer material used for hot rolling work rolls. Background technique [0002] Due to the harsh operating conditions of the hot-rolled work rolls, which are subject to high temperature, impact loads and the circulation of cooling water, especially the front-end stand, the performance requirements for the work rolls are very high. [0003] In recent years, due to the excellent characteristics of centrifugal casting high-speed steel composite hot rolling rolls, it has been rapidly popularized and applied. The feature of this composite roll is that it has a working layer made of high-speed steel. A large amount of alloying elements such as Cr, Mo, V, W, and Nb are added to the high-speed steel material, which can form MC, M 2 C and M 6 Various types of alloy carbides such as C have high hardness, are u...

Claims

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Application Information

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IPC IPC(8): B22D13/00B22D27/02C22C38/00
Inventor 孙大乐范群姚利松李小兵汪长安
Owner BAOSHAN IRON & STEEL CO LTD
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