Cantilevered roller and manufacturing method thereof

A manufacturing method and technology of cantilever rolls, which are applied in the field of steel smelting equipment, can solve problems such as poor performance of cantilever rolls, and achieve the effects of improving microhardness, reducing production costs, and increasing strength

Inactive Publication Date: 2018-06-08
江苏长友特钢机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, one of the objects of the present invention is to provide a cantilever roller and its

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A cantilever roller whose chemical composition and weight percentage are: carbon 0.33%, manganese 1.5%, silicon 1.2%, chromium 28%, nickel 48%, tungsten 5%, sulfur 0.3%, P phosphorous 0.4%, the balance It is iron and inevitable impurities. The above-mentioned cantilever roller is worth using the following manufacturing methods:

[0039] (1) Smelting process: Prepare steel raw materials according to the above chemical components and their weight percentages, and perform preliminary smelting in an electric arc furnace. After smelting, the molten steel is placed in a refining furnace to refine the molten steel, and the refining temperature is 1590℃; After adjusting the content of each chemical component to qualified, adjust the temperature to 1500℃ for tapping, and cast into steel ingots by die casting;

[0040] (2) Forging process: heating the steel ingot to 1200°C, holding time for 9 hours; then forging into a roll blank, and performing heat treatment and turning processing ...

Embodiment 2

[0044] A cantilever roller whose chemical composition and its weight percentage are: carbon 0.3%, manganese 1%, silicon 1.8%, chromium 29%, nickel 47%, tungsten 4%, sulfur 0.25%, P phosphorus 0.5%, the balance It is iron and inevitable impurities. The above-mentioned cantilever roller is worth using the following manufacturing methods:

[0045] (1) Smelting process: Prepare steel materials according to the above chemical components and their weight percentages, and perform preliminary smelting in an electric arc furnace. After the smelting is completed, the molten steel is placed in a refining furnace to refine the molten steel at a refining temperature of 1650°C; After adjusting the content of each chemical component to qualified, adjust the temperature to 1560°C for tapping, and cast into steel ingots by die casting;

[0046] (2) Forging process: heating the steel ingot to 1250°C, holding time for 7 hours; then forging into a roll blank, and heat treating and turning the roll bl...

Embodiment 3

[0050] A cantilever roller whose chemical composition and weight percentage are: carbon 0.39%, manganese 2%, silicon 1%, chromium 27%, nickel 49%, tungsten 6%, sulfur 0.35%, P phosphorous 0.3%, the balance It is iron and inevitable impurities. The above-mentioned cantilever roller is worth using the following manufacturing methods:

[0051] (1) Smelting process: Prepare steel materials according to the above chemical components and their weight percentages, and conduct preliminary smelting in an electric arc furnace. After smelting, place the molten steel in a refining furnace for refining the molten steel at a refining temperature of 1600℃; After adjusting the content of each chemical component to qualified, adjust the temperature to 1540°C for tapping, and cast into steel ingots by die casting;

[0052] (2) Forging process: heating the steel ingot to 1230°C, holding time for 8 hours; then forging into a roll blank, and heat treating and turning the roll blank;

[0053] (3) Temper...

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Abstract

The invention discloses a cantilevered roller and a manufacturing method thereof. The cantilevered roller is prepared from the following chemical components by weight percent: 0.30-0.39% of C, 1-2% ofMn, 1-1.8% of Si, 27-29% of Cr, 47-49% of Ni, 4-6% of W, 0.25-0.35% of S, 0.3-0.5% of P, and the balance of Fe and unavoidable impurities. The manufacturing method can solve the problems that in theprior art, the cantilevered roller is poor in performance and shorter in service life.

Description

Technical field [0001] The invention relates to the technical field of steel smelting equipment, in particular to a cantilever roll and a manufacturing method thereof. Background technique [0002] The cantilever roll can be used in, for example, a walking heating furnace in the steelmaking field. Taking a steel rolling heating furnace as an example, the cantilever roll is used to guide the billet in and out, and send the billet into the rough rolling mill. However, it has been found that this cantilever roll has the following shortcomings in use: 1. Because the temperature in the furnace is as high as 1100°C, the roll head often cracks and the roll head is broken under the action of thermal expansion and contraction during operation; 2. Roller The head material is 45# steel, which is rapidly oxidized under the action of high temperature, and the abrasion resistance of the roller body is greatly reduced. It often wears and leaks and leaks until the roller head falls off; 3. The f...

Claims

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Application Information

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IPC IPC(8): C22C38/60C22C38/44C22C38/02C22C38/58C22C38/04C22C33/04C21D8/00
CPCC22C38/60C21D8/005C22C33/04C22C38/002C22C38/02C22C38/04C22C38/44C22C38/58
Inventor 王长洪王万亮
Owner 江苏长友特钢机械有限公司
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