Preparing method for wear-resisting steel used for water-cooling nozzle

A wear-resistant steel and nozzle technology, which is applied in the coating process of metal materials, etc., can solve problems such as insufficient wear resistance, and achieve the effects of increasing hardness, improving corrosion resistance, and small electronegativity

Inactive Publication Date: 2016-10-26
CHUZHOU DIBANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The water-cooling nozzle materials in the prior art often have insufficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of preparation method that the present invention proposes is used for the wear-resistant steel of water-cooled nozzle, comprises the following steps:

[0021] S1. Raising the temperature of the raw material to a molten state to obtain a liquid alloy, wherein the components of the liquid alloy include: C: 0.05%, Cr: 1.3%, Al: 0.5%, Mg: 1.4%, Zr: 0.4%, Ni: 0.3%, Mn: 0.8%, Mo: 0.15%, V: 0.06%, Co: 0.08%, Ga: 0.01%, Ti: 1.2%, Si: 0.3%, and the rest is Fe; then cast to get billets;

[0022] S2. Raise the temperature of the billet to 520°C at a heating rate of 12°C / min, keep it for 4 hours, then raise it to 700°C at a heating rate of 3°C / min, keep it for 50 minutes, and then raise it to 980 at a heating rate of 2°C / min ℃, keep warm for 4h, then oil cool to 250°C, then heat up to 540°C, keep warm for 1h, air cool to room temperature;

[0023] S3. Place the heat-treated billet in acetone and let it stand for 12 minutes, then perform ultrasonic cleaning for 5 minutes, ta...

Embodiment 2

[0026] A kind of preparation method that the present invention proposes is used for the wear-resistant steel of water-cooled nozzle, comprises the following steps:

[0027] S1. Raw materials are heated to a molten state to obtain a liquid alloy, wherein the components of the liquid alloy include: C: 0.1%, Cr: 1%, Al: 0.8%, Mg: 1.1%, Zr: 0.6%, Ni: 0.2%, Mn: 1.1%, Mo: 0.1%, V: 0.1%, Co: 0.05%, Ga: 0.03%, Ti: 0.8%, Si: 0.6%, and the rest is Fe; then casting to get billets;

[0028] S2. Raise the temperature of the billet to 550°C at a heating rate of 9°C / min, keep it for 3 hours, then raise it to 680°C at a heating rate of 4°C / min, keep it for 60 minutes, and then raise it to 1000 at a heating rate of 1°C / min ℃, keep warm for 3h, then oil cool to 280°C, then heat up to 525°C, keep warm for 2h, then air cool to room temperature;

[0029] S3. Place the heat-treated billet in acetone for 8 minutes, then ultrasonically clean it for 10 minutes, take it out and wash it, then place it ...

Embodiment 3

[0032] A kind of preparation method that the present invention proposes is used for the wear-resistant steel of water-cooled nozzle, comprises the following steps:

[0033] S1. Raising the temperature of the raw material to a molten state to obtain a liquid alloy, wherein the components of the liquid alloy include: C: 0.08%, Cr: 1.1%, Al: 0.7%, Mg: 1.2%, Zr: 0.55%, Ni: 0.23%, Mn: 1%, Mo: 0.12%, V: 0.09%, Co: 0.06%, Ga: 0.023%, Ti: 0.9%, Si: 0.5%, and the rest is Fe; then cast to get billets;

[0034] S2. Raise the temperature of the billet to 540°C at a heating rate of 10°C / min, keep it warm for 3.6h, then raise it to 685°C at a heating rate of 3.5°C / min, keep it warm for 58min, and then raise it to 1.2°C / min at a heating rate of 995°C, heat preservation for 3.4h, then oil cooling to 270°C, then heating to 530°C, heat preservation for 1.8h, air cooling to room temperature;

[0035] S3. Place the heat-treated billet in acetone for 9 minutes, then ultrasonically clean it for 8 ...

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Abstract

The invention discloses a preparing method for wear-resisting steel used for a water-cooling nozzle. The preparing method includes the following steps that smelting and pouring are conducted; heat treatment is conducted; a steel billet obtained after heat treatment is subjected to pretreatment and then put into a boriding agent, the temperature is increased to 910 DEG C to 930 DEG C, heat insulation is conducted for 6 h to 7 h, and then a steel billet generated after boriding is obtained; and covering of a conversion film is conducted. The use amount of the boriding agent ranges from 1.3 g/cm<2> to 1.6 g/cm<2>, and the boriding agent includes, by weight, 4-6 parts of boron carbide, 10-15 parts of borax, 3-4 parts of potassium fluoborate, 0.5-1 part of sodium fluosilicate, 5-7 parts of sodium bicarbonate, 40-50 parts of silicon carbide and 30-35 parts of activated carbon. Covering of the conversion film includes the specific steps that the steel billet generated after boriding is cleaned and then put into a conversion solution, the temperature is increased to 40 DEG C to 50 DEG C, heat insulation is conducted for 18 min to 22 min, and the wear-resisting steel used for the water-cooling nozzle is obtained through drying. The wear-resisting steel has good wear-resisting performance and is good in corrosion resistance performance and high temperature resistance performance.

Description

technical field [0001] The invention relates to the technical field of water-cooled nozzle steel, in particular to a preparation method of wear-resistant steel for water-cooled nozzles. Background technique [0002] Water-cooled nozzles in the field of metallurgy are often used for heat treatment such as quenching to strengthen the resulting alloys, so water-cooled nozzles are required to have excellent high temperature resistance. The coolant in water cooling often uses water or salt solution, which is easy to rust the surface of the water-cooling nozzle, so the water-cooling nozzle also needs to have high corrosion resistance. The alloy will rub against the water-cooling nozzle during the water-cooling process, so the water-cooling nozzle also needs to have strong wear resistance. [0003] The water-cooling nozzle materials in the prior art often have insufficient wear resistance, and a new wear-resistant steel material is needed for the water-cooling nozzle. Contents o...

Claims

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Application Information

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IPC IPC(8): C23C8/70C22C38/18C22C38/06C22C38/14C22C38/08C22C38/04C22C38/12C22C38/10C22C38/02C21D6/00C23C22/34
CPCC23C8/70C21D6/004C21D6/007C22C38/002C22C38/02C22C38/04C22C38/06C22C38/105C22C38/12C22C38/14C22C38/18C23C22/34
Inventor 梁晓杨正超沙思延
Owner CHUZHOU DIBANG TECH
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