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Hot roll for rolling titanium plate and manufacturing method of hot roll

A manufacturing method and technology of hot rolling rolls, which are applied in the directions of rolls, metal rolling, and manufacturing tools, etc., can solve the problems such as hot cracks on the surface of the roll body, poor quality of the titanium plate surface, shortening the life of the rolls, etc., so as to enhance the corrosion resistance. The effect of strong corrosion resistance and thermal crack resistance

Active Publication Date: 2013-12-11
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the rolling production process, the hot rolls are subjected to electrochemical corrosion under rolling stress conditions and stress fatigue under corrosive conditions at the same time. Thermal cracks are prone to appear on the surface of the roll body, and the grinding amount of the off-machine is large, which further aggravates the wear and tear of the rolls. , shorten the life of the roll;
[0006] (3) The thermal cracks on the surface of the hot roll are easily printed on the titanium plate, resulting in poor quality of the titanium plate surface and high scrap rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Hot rolls for rolling titanium plates, the design targets for the chemical components and weight percentages in the hot rolls are: C0.30-0.35%, Si0.80-0.90%, Mn0.70-0.80%, Cr4 .50~5.00%, Ni0.35~0.45%, Mo1.40~1.50%, V0.80~0.90%, P≤0.025%, S≤0.020%; the rest is Fe and unavoidable impurities.

[0028] The manufacturing method of the hot-rolled titanium work roll comprises the following process steps:

[0029] A. Refining steel ingots: prepare raw materials according to the above chemical components and their weight percentages, and carry out preliminary smelting in an electric arc furnace into molten steel. After smelting, the molten steel is refined and vacuum degassed in an LF refining furnace. The molten steel is poured and molded into electrode ingots;

[0030] After the obtained electrode ingot is annealed, the electrode ingot is melted and cast into a steel ingot by using an electroslag remelting method.

[0031] After analyzing the chemical composition of the obta...

Embodiment 2

[0040] Process step is identical with embodiment 1 among the embodiment 2, and the difference with embodiment 1 is:

[0041] The design targets for the chemical components and weight percentages of the hot rolls described in this example are: C0.40-0.45%, Si0.60-0.70%, Mn0.90-1.00%, Cr4.50-5.00% , Ni0.05~0.10%, Mo1.60~2.00%, V0.50~0.60%, P≤0.025%, S≤0.020%; the rest is Fe and unavoidable impurities.

[0042]Carry out chemical composition analysis to the steel ingot that step A obtains, the chemical composition and weight percentage composition thereof in the obtained steel ingot are: C0.45%, Si0.60%, Mn1.00%, Cr4.50%, Ni0.05 %, Mo2.00%, V0.50%, P0.019%, S0.015%.

[0043] The surface hardness of the hot-rolled work roll of this embodiment is measured by a dedicated roll Shore hardness tester to be 73-75 HSD. The hot roll produced in this embodiment has good metallographic structure and metallurgical properties. Under the same rolling temperature and rolling load, the corrosio...

Embodiment 3

[0045] Process step is identical with embodiment 1 among the embodiment 3, and the difference with embodiment 1 is:

[0046] The design targets of the chemical components and weight percentages of the hot rolls described in this example are: C0.30-0.35%, Si0.80-0.90%, Mn0.60-0.70%, Cr4.80-5.50% , Ni0.55~0.65%, Mo1.00~1.10%, V0.60~0.70%, P≤0.020%, S≤0.010%; the rest is Fe and unavoidable impurities.

[0047] Carry out chemical composition analysis to the steel ingot that step A obtains, the chemical composition and weight percentage composition thereof in the steel ingot that obtains are: C0.30%, Si0.80%, Mn0.60%, Cr5.50%, Ni0.65 %, Mo1.00%, V0.70%, P0.017%, S0.007%.

[0048] The surface hardness of the hot-rolled work roll of this embodiment is measured by a dedicated roll Shore hardness tester to be 72-74 HSD. The hot roll produced in this embodiment has good metallographic structure and metallurgical properties. Under the same rolling temperature and rolling load, the corr...

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Abstract

The invention discloses a hot roll for rolling a titanium plate, and a manufacturing method of the hot roll. The hot roll comprises the following chemical constituents in percentage by weight: 0.30-0.50% of C, 0.60-2.00% of Si, 0.20-1.00% of Mn, 4.50-6.00% of Cr, 0.05-0.65% of Ni, 1.00-2.00% of Mo, 0.50-1.50% of V, less than or equal to 0.025% of P, less than or equal to 0.020% of S, and the balance of Fe and unavoidable impurities. The manufacturing method of the hot roll for rolling the titanium plate comprises the processing steps of steel ingot refining, roll blank forging, thermal refining, induction quenching treatment, tempering treatment and the like. Compared with the traditional hot roll made of a Cr3 material, the hot roll is good in abrasive resistance, corrosion resistance and thermal crack resistance, and the service life of the hot roll can be prolonged by above 70%.

Description

technical field [0001] The invention relates to a roll and a manufacturing method thereof, in particular to a hot rolling roll for rolling titanium plates and a manufacturing method thereof. Background technique [0002] Titanium has a series of excellent properties and is widely used in aerospace, aviation, chemical industry, petroleum, metallurgy, light industry, electric power, seawater desalination, ships and daily life appliances and other fields. Titanium plate has the characteristics of high strength and low density, good mechanical properties, good toughness and corrosion resistance. With the rapid development of my country's economy, the demand for titanium and its alloys is increasing, and the requirements for the surface quality and dimensional accuracy of titanium plates are also getting higher and higher. Therefore, the performance requirements for hot rolls used for rolling titanium plates are also increasing. Higher and higher. [0003] At present, the hot ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/46C21D9/38B21B27/00
Inventor 杨昱东高新生
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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