Purification smelting process of wear-resistant castings

A technology of purification and craftsmanship, applied in the field of purification and smelting of anti-wear castings, can solve problems such as unsatisfactory deoxidation effect, low material purity, and affecting high-end products, so as to reduce oxidized inclusions and reduce the probability of reaction , the effect of prolonging the service life

Pending Publication Date: 2020-09-15
安徽中建材开源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to insufficient understanding of the importance of purification and the limitation of production technology, the deoxidation effect of the existing purification process is not very satisfactory, resulting in high total oxygen content and various inclusion levels in molten steel. The purity of the material is not high, which affects its application in more high-end products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A purification smelting process for anti-wear castings proposed by the present invention comprises the following steps:

[0040] S1. Select steel scrap, ferrochrome alloy, ferromolybdenum alloy, ferromanganese alloy, ferrosilicon alloy, ferrovanadium alloy, ferrotungsten alloy, ferronickel alloy, ferrohafnium alloy and rare earth ferroalloy as raw materials;

[0041] S2. Put steel scrap into the smelting equipment, melt 1 / 3, add ferrochrome alloy and ferromolybdenum alloy for smelting, then add ferromanganese alloy, ferrosilicon alloy, ferrovanadium alloy, ferrotungsten alloy, ferronickel alloy, ferrohafnium alloy and rare earth iron alloy for smelting, add deoxidizer to purify , Obtain pre-deoxidized molten steel after slag removal;

[0042] S3. Use a diffusion deoxidizer to perform a diffusion deoxidation, then use ferrosilicon and ferromanganese to carry out precipitation deoxidation, then use a diffusion deoxidizer to perform a second diffusion deoxidation, and then...

Embodiment 2

[0046] A purification smelting process for anti-wear castings, comprising the following steps:

[0047]S1. Select steel scrap, ferrochrome alloy, ferromolybdenum alloy, ferromanganese alloy, ferrosilicon alloy, ferrovanadium alloy, ferrotungsten alloy, ferronickel alloy, ferrohafnium alloy and rare earth ferroalloy as raw materials; wherein, the size of each raw material is 40-60mm;

[0048] S2. Put steel scrap into a one-to-two intermediate frequency induction furnace, melt 1 / 2, add ferrochrome alloy and ferromolybdenum alloy for melting, then add ferromanganese alloy, ferrosilicon alloy, ferrovanadium alloy, ferrotungsten alloy, ferronickel alloy, ferrohafnium alloy and ferro-rare alloy for melting, Add deoxidizer to purify and remove slag to obtain pre-deoxidized molten steel; the temperature of the smelting is 1450°C; the temperature of the pre-deoxidized molten steel is 1400°C; the weight of the added deoxidizer is 0.15wt of the weight of the molten steel to be treated %;...

Embodiment 3

[0055] A purification smelting process for anti-wear castings, comprising the following steps:

[0056] S1. Select steel scrap, ferrochrome alloy, ferromolybdenum alloy, ferromanganese alloy, ferrosilicon alloy, ferrovanadium alloy, ferrotungsten alloy, ferronickel alloy, ferrohafnium alloy and rare earth ferroalloy as raw materials; wherein, the size of each raw material is 50-90mm;

[0057] S2. Put steel scrap into a one-to-two intermediate frequency induction furnace, melt 1 / 2, add ferrochrome alloy and ferromolybdenum alloy for melting, then add ferromanganese alloy, ferrosilicon alloy, ferrovanadium alloy, ferrotungsten alloy, ferronickel alloy, ferrohafnium alloy and ferro-rare alloy for melting, Add deoxidizer to purify and remove slag to obtain pre-deoxidized molten steel; wherein, the temperature of the smelting is 1550°C; the temperature of the pre-deoxidized molten steel is 1420°C; The weight is 0.25wt% of the molten steel weight;

[0058] S3. Use a diffusion deoxi...

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PUM

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Abstract

The invention discloses a purification smelting process of wear-resistant castings. The process comprises the steps that scrap steel, ferrochrome, ferromolybdenum, ferromanganese, ferrosilicon, ferrovanadium, ferrotungsten, ferro-nickel, ferro-hafnium and rare earth ferroalloy are selected as raw materials; the scrap steel is added into smelting equipment, after melting by 1 / 3-1 / 2, the ferrochromeand the ferromolybdenum are added for smelting, then the ferromanganese, the ferrosilicon, the ferrovanadium, the ferrotungsten, the ferro-nickel, the ferro-hafnium and the rare earth ferroalloy areadded for smelting, and a deoxidizing agent is added for purification and slagging-off; a diffusion deoxidizing agent is used for primary diffusion deoxidation, then ferrosilicon and ferromanganese are used for precipitation deoxidation, then the diffusion deoxidizing agent is used for secondary diffusion deoxidation, and the deoxidizing agent is used for final deoxidation to obtain deoxidized molten steel; the deoxidized molten steel is refined through an LF method to obtain refined molten steel; and the refined molten steel is discharged from a furnace and poured after the composition of therefined molten steel is adjusted. The purification smelting process of the wear-resistant castings is simple in operation and good in purification effect.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a purification and smelting process for wear-resistant castings. Background technique [0002] The purification of anti-wear castings mainly refers to the control of the content of elements that are easy to form inclusions such as oxygen, hydrogen, nitrogen, phosphorus, sulfur, rare earth, aluminum, etc. in the casting to the minimum limit, so that the content, size, shape and distribution of inclusions in the casting The key metallurgical indicators should be controlled within the optimal range specified in the relevant standards (such as strictly controlling the level of inclusions < 2A or 2B). Only the anti-wear castings produced in this way can be called purified high-quality anti-wear castings. [0003] The degree of purification of anti-wear castings is closely related to the inclusion content, inclusion level, inclusion size, shape, distribution, etc. contained in an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/08C22C33/06C21C7/00C21C7/06C22C37/08C22C37/10C22C38/02C22C38/04C22C38/44C22C38/46C22C38/56
CPCC21C7/0006C21C7/06C22C33/06C22C33/08C22C37/08C22C37/10C22C38/002C22C38/005C22C38/02C22C38/04C22C38/44C22C38/46C22C38/56
Inventor 汪德发徐超汤新明张国芳翟健魏纪
Owner 安徽中建材开源新材料科技有限公司
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