Forged semi-high-speed steel intermediate roll and manufacturing method thereof

A technology of semi-high-speed steel and manufacturing methods, which is applied in the field of roll preparation, can solve problems such as the increase in roll purchase costs, and achieve the effect of not reducing the service period, ensuring the service period, and ensuring smooth progress

Inactive Publication Date: 2019-03-15
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the upgrading of materials, the purchase cost of rolls has also increased significantly, which has brought a great economic burden to rolling mills

Method used

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  • Forged semi-high-speed steel intermediate roll and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: A forged semi-high-speed steel intermediate roll. The chemical components and contents contained in the material of the intermediate roll are shown in Table 1. The diameter of the intermediate roll is 280 mm, and the length of the intermediate roll is 3000 mm. The preparation steps of the intermediate roll are: prepare the intermediate roll blank according to the chemical composition and content of the above-mentioned intermediate roll material, and rough-turn the blank; then perform quenching and tempering treatment, heat the rough-turned blank to 920°C Under heat preservation for 8 hours, then quenching and tempering treatment; quenching and tempering treatment adopts water cooling and quenching, and then tempering, the tempering temperature is 640 ° C, and the tempering holding time is 15 hours; after that, quenching heat treatment is carried out, quenching is carried out by using double intermediate frequency induction furnace, scanning The heating tempera...

Embodiment 2

[0033] Example 2: A forged semi-high-speed steel intermediate roll. The chemical components and contents contained in the material of the intermediate roll are shown in Table 1. The diameter of the intermediate roll is 320 mm, and the length of the intermediate roll is 3500 mm. The preparation steps of the intermediate roll are: prepare the intermediate roll blank according to the chemical composition and content of the above-mentioned intermediate roll material, and rough-turn the blank; then perform quenching and tempering treatment, heat the rough-turned blank to 950°C Under heat preservation for 4 hours, quenching and tempering treatment adopts water cooling and quenching, and then tempering, the tempering temperature is 620°C, and the tempering holding time is 15 hours; after that, quenching heat treatment is carried out, quenching is carried out by double intermediate frequency induction furnace, and the scanning heating temperature is 980 ℃, the scanning speed is 48mm / mi...

Embodiment 3

[0034] Example 3: A forged semi-high-speed steel intermediate roll. The chemical components and contents contained in the material of the intermediate roll are shown in Table 1. The diameter of the intermediate roll is 360 mm, and the length of the intermediate roll is 3500 mm. The preparation steps of the intermediate roll are: prepare the intermediate roll blank according to the chemical composition and content of the above-mentioned intermediate roll material, and rough-turn the blank; then perform quenching and tempering treatment, heat the rough-turned blank to 900°C Keep warm for 6 hours. After the heat preservation is completed, perform water cooling and quenching, and then temper. The tempering temperature is 600 ° C, and the tempering holding time is 20 hours. ℃, the scanning speed is 36mm / min; after quenching, temper at medium temperature, the tempering temperature is 380℃, and the holding time is 25h.

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Abstract

The invention discloses a forged semi-high-speed steel intermediate roll and a manufacturing method thereof, and belongs to the field of roll preparation. The forged semi-high-speed steel intermediateroll has a chemical composition and a weight percentage of 0.50 to 0.80% of C, 0.80 to 1.20% of Si, 0.20 to 0.80% of Mn, 5.00 to 8.00% of Cr, 1.00 to 2.00% of Mo, 0.20 to 1.00% of V and the balance Fe and unavoidable impurities. The forged semi-high-speed steel intermediate roll and the manufacturing method thereof provided by the invention reduce the production cost on the basis of ensuring theroughness maintaining capability of the intermediate roll applied in the high-end eighteen rolling mill and the non-shortened service cycle.

Description

technical field [0001] The invention belongs to the field of roll preparation, and in particular relates to a forged semi-high-speed steel intermediate roll and a manufacturing method thereof. Background technique [0002] The 18-high rolling mill can be regarded as a model with 4 sets of side support devices added on the basis of the 6-high HC rolling mill. During rolling, the deformation area is small and the rolling force is small. It is suitable for rolling difficult-to-deform materials and thin strips. material; its single rolling pass has a high reduction rate, which can reduce the number of annealing and energy consumption. Compared with the 20-high rolling mill, the 18-high rolling mill does not have problems such as small opening and difficult strip threading, and is suitable for continuous rolling mills. Since the advent of the 18-high rolling mill, many famous iron and steel equipment research and development institutions in the world have also carried out in-dep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D1/25C21D9/38C22C38/02C22C38/04C22C38/22C22C38/24
CPCC21D1/18C21D1/25C21D9/38C22C38/002C22C38/02C22C38/04C22C38/22C22C38/24
Inventor 梁建立韩维国梁俊良辛胜朋
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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