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Preparation method of in-situ regenerated titanium nitride steel-based roller

A titanium nitride steel-based, in-situ regeneration technology, applied in the field of roll manufacturing in the iron and steel metallurgy industry, can solve the problem of solid ceramic particles floating on the surface of molten steel, easy to fall off, low surface activity of TiN ceramic particles, etc. question

Pending Publication Date: 2021-11-05
SANXIN HEAVY IND MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the specific gravity of TiN powder is lighter than that of molten steel, the sprayed solid ceramic particles are easy to float on the surface of molten steel (the yield is very low); in addition, due to the low surface activity of TiN ceramic particles, and the surface between it and molten steel Tension will make it difficult to form a complete metallurgical bond between the surface of the ceramic particles and the steel-based metal, and exist in the roll material in the form of impurities, which are prone to fall off during use

Method used

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  • Preparation method of in-situ regenerated titanium nitride steel-based roller
  • Preparation method of in-situ regenerated titanium nitride steel-based roller
  • Preparation method of in-situ regenerated titanium nitride steel-based roller

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1 As shown, it is an alloy cast steel BD roll prepared by in-situ regenerated titanium nitride steel-based roll, which is manufactured by the static integral top casting method and is suitable for single-stand BD or double-stand BD1. The preparation steps are:

[0036] (1) Molding: According to the product specification and process of production, the bottom box for the cast lower roll neck, the cold mold for the roll body, and the upper box and riser for the upper roll neck are respectively molded; baked and dried; and The bottom box, the cold box, the top box, and the riser box are connected in sequence to form (combined box);

[0037] (2) Smelting: Put all raw materials into an intermediate frequency furnace for smelting, remove slag, and then roughly adjust the chemical composition of the original steel-based alloy melt according to the middle and lower limits of the following range: C0.6-0.75%, Si0.4-0.8 %, Mn0.5-1.2%, Cr0.8-1.5%, Ni0.2-1.2%, Mo0.2-...

Embodiment 2

[0045] Such as figure 1 As shown, it is a kind of graphite semi-steel BD roll prepared by the static integral top casting method provided by the present invention, which is suitable for double-frame BD2 and in-situ regeneration of titanium nitride steel-based roll raw materials. The specific preparation steps are as follows: :

[0046] (1) molding: with embodiment 1;

[0047] (2) Smelting: The difference between this embodiment and step (2) of Embodiment 1 is that the chemical composition of the original steel-based alloy melt is adjusted to: C1.2-1.4%, Si0.4-1.0 %, Mn0.5-1.2%, Cr0.8-1.5%, Ni0.5-1.5%, Mo0.2-0.8%, V0.01-0.2%, Ti0.02-0.05%, Al0.02-0.03% , [N]0.02-0.04%, the rest is Fe steel-based alloy materials, in addition, P, S, [O] are harmful elements usually P≤0.03%, S≤0.025%, after deoxidation [O]≤0.0015% (first Roughly adjust the chemical composition of the alloy according to the lower limit of the process in the intermediate frequency furnace, including adjusting Ti ...

Embodiment 3

[0056] Such as image 3 As shown, it is a graphite semi-steel billet continuous rolling roll prepared by in-situ regenerated titanium nitride steel-based roll raw material provided by the invention using a static integral top casting method, and its specific preparation steps are:

[0057] The difference between this embodiment and Example 2 is that the contents of each component of the raw material are: C1.4-1.8%, Si0.4-1.0% (0.6-1.5)% before inoculation, Mn0.5-1.2%, Cr0 .8-1.5%, Ni0.5-1.5%, Mo0.2-0.8%, V0.01-0.2%, Ti0.02-0.05%, Al0.02-0.03%, [N]0.03-0.04%, the rest It is a steel-based alloy material of Fe. In addition, P and S are usually P≤0.03 and S≤0.025 as harmful elements. Tuning + fine-tuning, do not use the refining furnace for smelting, but use the refining bag to blow nitrogen. The difference between the refining furnace and the refining bag is that the furnace has a heating function, and the bag only has the function of blowing without heating. All the refining ba...

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Abstract

The invention discloses a preparation method of an in-situ regenerated titanium nitride steel-based roller. The raw material of the steel-based roller is an alloy mixed suspension containing TiN particles, and the alloy mixed suspension is prepared by the following steps of adjusting the titanium content to 0.02-0.05% and the nitrogen content to 0.02-0.03% in a roughly adjusted alloy melt of the steel-based roller to generate part of TiN particles; and pure nitrogen is blown into the alloy solution, and TiN particles are continuously generated in the alloy solution. Compared with the prior art, the in-situ regenerated titanium nitride steel-based roller has the effect of improving the wear resistance on the premise of not destroying the strength performance index of an original steel-based matrix.

Description

technical field [0001] The invention belongs to the field of roll manufacturing for the iron and steel metallurgy industry, and in particular relates to a method for preparing steel-based rolls containing titanium nitride by adopting an in-situ regeneration method in molten steel. Background technique [0002] At present, the two-roll hot-rolled steel-based metallurgical rolls include BD rolls for billet rolling mills, rolls for billet continuous rolling mills, rolls for plate rough rolling mills, rolls and roll rings for rough, medium and finish rolling of section steel, and the net weight of a single piece ranges from 3 tons to 49 tons, and the single weight of castings ranges from 5 tons to nearly 80 tons, all of which are super-large castings. [0003] The current materials for the roll and roll ring include: traditional alloy steel, semi-steel, and graphite steel. The main alloying elements used are Cr, Ni, Mo, etc. From alloy steel to semi-steel, in addition to the a...

Claims

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Application Information

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IPC IPC(8): C22C33/06C22C38/02C22C38/04C22C38/44C22C38/46C22C38/06C22C38/50
CPCC22C33/06C22C38/02C22C38/04C22C38/44C22C38/46C22C38/06C22C38/50C22C38/001
Inventor 周守行花志仁戴鹏宇万建荣万华文汪晨晨赵冬华徐文俊
Owner SANXIN HEAVY IND MACHINERY
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