A kind of high chromium cast iron composite cast steel product roll and preparation method thereof

A technology of composite casting and high chromium cast iron, which is applied in the direction of rolls, metal rolling, metal rolling, etc., can solve the problems of limited output of section steel rolls, high requirements for worn rolls, and drop in hardness, so as to improve performance and eliminate compounding Stress, yield and quality enhancement effects

Active Publication Date: 2018-02-16
江苏凯达重工股份有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] At present, large and medium-sized steel rolls have deep pass patterns, multiple pass patterns, uneven wear, and high requirements for the operation of the rolls, which makes the surface hardness of the rolls and the bottom of the pass groove, the side wall, and the R angle have uneven hardness and hardness drops. There are also certain restrictions on the output of section steel rolls

Method used

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  • A kind of high chromium cast iron composite cast steel product roll and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] [Example 1] The structure of the high chromium cast iron composite cast steel product roll of the present embodiment is as follows figure 1 Shown: A high chromium cast iron compound cast steel product roll assembly: including two metallographic matrix structures of Cr 7 C 3 、Mo 2 C, VC, NbC fine-grained carbide + bainite + a small amount of martensite high-chromium cast iron compound cast steel product rolls, one of which is used as the main shaft 1, and the other is used as the auxiliary shaft 2, and the two mesh with each other; the main shaft includes The roll body 1-1 located in the middle, the roll neck 1-2 located at both ends of the roll body, and the bearing stop roll neck 1-3; the auxiliary shaft 2 includes the roll body 2-1 located in the middle and the roll neck 2-2 located at both ends of the roll body 2. Bearing retaining roll neck 2-3.

[0029] The main shaft roll body 1-1 of the assembly of the roll includes 4 teeth surrounding the roll body 1-1, and t...

Embodiment 2

[0039] [Example 2] The configuration chemical composition of the high chromium cast iron composite cast steel product roll of this embodiment is: the chemical composition of the outer layer is: C: 3.00%; Si: 0.70%; Mn: 0.80%; Cr: 13.00%; Ni : 2.00%; Mo: 1.30%; V: 0.40%; Nb: 0.30%; P: 0.02%; S: 0.015%; the chemical composition of the core is: C: 3.13%; Nb: 0.16%; Ni: 0.35%; P: 0.01%; S: 0.015%; Mg: 0.05%; the balance is Fe and a small amount of residual elements.

[0040] The design value of the working layer hardness of the high-chromium cast iron composite casting steel product roll is 65-75HSD, and the actual product is 73.5HSD; the design value of the hardness drop from the roll surface to the groove bottom is ≤2HSD, and the actual product is 1.2HSD; The design value of the working layer thickness of the high-chromium cast iron compound casting steel product roll is 80-180mm, and the actual product is 102mm.

[0041] The preparation method of the high-chromium cast iron co...

Embodiment 3

[0042] [Example 3] The configuration chemical composition of the high-chromium cast iron composite cast steel product roll of this embodiment is: the chemical composition of the outer layer is: C: 3.30%; Si: 0.90%; Mn: 1.10%; Cr: 15.00%; Ni : 1.70%; Mo: 1.30%; V: 0.50%; Nb: 0.10%; P: 0.01%; S: 0.02%; the chemical composition of the core is: C: 3.40%; Nb: 0.23%; Ni: 0.42%; P: 0.02%; S: 0.015%; Mg: 0.06%; the balance is Fe and a small amount of residual elements.

[0043] The design value of the working layer hardness of the high-chromium cast iron composite casting steel product roll is 65-75HSD, and the actual product is 74.5HSD; the design value of the hardness drop from the roll surface to the groove bottom is ≤2HSD, and the actual product is 1.1HSD; The design value of the working layer thickness of the high-chromium cast iron compound casting steel product roll is 80-180mm, and the actual product is 146mm.

[0044] The preparation method of the high-chromium cast iron com...

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Abstract

The invention relates to a high chromium cast iron composite casting section steel product roller. The chemical components of the high chromium cast iron composite casting section steel product roller are divided into two configurations of an outer layer and a core part, wherein the outer layer comprises the following chemical components: 2.80-3.30% of C, 0.50-1.00% of Si, 0.50-1.20% of Mn, 10.00-15.00% of Cr, 1.50-2.50% of Ni, 1.00-1.50% of Mo, 0.20-0.60% of V, 0.10-0.30% of Nb, P which is less than or equal to 0.03%, and S which is less than or equal to 0.025%; and the core part comprises the following chemical components 3.00-3.40% of C, 1.80-2.50% of Si, 0.30-0.70% of Mn, Nb which is greater than or equal to 0.10%, Ni which is greater than or equal to 0.30%, P which is less than or equal to 0.03%, S which is less than or equal to 0.025%, 0.04-0.07% of Mg, and the balance of Fe and a few residual elements. Compared with ordinary rollers, the high chromium cast iron composite casting section steel product roller disclosed by the invention has the advantages that through optimizing configuration, the surface quality of the section steel roller is improved, the service life of the roller is prolonged, the production cost of the section steel roller is reduced, and the market competitiveness of products is strengthened.

Description

technical field [0001] The invention relates to a high-chromium cast iron compound cast steel product roll and a preparation method thereof. Background technique [0002] At present, large and medium-sized steel rolls have deep pass patterns, multiple pass patterns, uneven wear, and high requirements for the operation of the rolls, which makes the surface hardness of the rolls and the bottom of the pass groove, the side wall, and the R angle have uneven hardness and hardness drops. And other issues, there are certain restrictions on the output of section steel rolls. Therefore, it is necessary to further solve the above-mentioned problems. Contents of the invention [0003] In order to solve the above problems, the present invention firstly provides a technical solution for high chromium cast iron composite cast steel product roll. [0004] A high chromium cast iron compound cast steel product roll, the chemical composition of the high chromium cast iron compound cast st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C22C37/08B22D19/16C21D9/38B22D1/00B21B27/02
CPCB21B27/02B22D1/007B22D19/16C21D9/38C21D2211/002C21D2211/008C22C37/08C22C37/10
Inventor 许健周国祥蒋志芳
Owner 江苏凯达重工股份有限公司
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