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A kind of amorphous modifier for low-alloy cast steel and its preparation method and application

A low-alloy cast steel, amorphous technology, applied in the field of metal materials and metallurgy, can solve the problems of molten steel pollution, large size differences, waste of elements, etc.

Inactive Publication Date: 2019-04-23
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to propose a more efficient, environmentally friendly and energy-saving amorphous metamorphic agent for the problems of various types of compounds, large size differences, element waste, and molten steel pollution in the current cast steel smelting process. agent

Method used

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  • A kind of amorphous modifier for low-alloy cast steel and its preparation method and application
  • A kind of amorphous modifier for low-alloy cast steel and its preparation method and application
  • A kind of amorphous modifier for low-alloy cast steel and its preparation method and application

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Effect test

Embodiment 1

[0031] Step 1: Polish the surface oxide layers of metal materials such as Ce, Al, Ni, Nb and Cu with a purity of not less than 99.9%, and then clean them according to Ce 22.63g, Al 0.76g, Ni 2.08g, Cu 1.89g , Nb2.63g (the corresponding atomic ratio is calculated as: Ce 58%Al 10%Ni 12.5%Cu 10.5%Nb 9%) composition ratio Put the prepared materials evenly into the electric arc furnace crucible, and then cover the furnace Cover, evacuated to 5.0 x 10 -3 Pa and then fill the furnace with high-purity Ar gas with a purity of 99.9% to dilute the residual gas in the furnace cavity, and then evacuate to 5.0×10 -3 Pa, and then fill the furnace with 0.6 atmospheric pressure of high-purity Ar gas. First smelt pure titanium for 3.5 minutes, and then smelt pure titanium placed in another crucible next to the alloy for 3.5 minutes to consume oxygen in the furnace cavity and ensure the purity of the master alloy smelting. Then smelt the alloy, smelting 100s-110s at a constant power of 20KW, t...

Embodiment 2

[0035] The first step: polish the surface oxide layer of metal materials such as Ce, Al, Ni, Nb and Cu with a purity of not less than 99.9%, and then clean the surface according to Ce 33.19g, Al1.12g, Ni 3.05g, Cu 2.77g Nb 3.86g (calculated corresponding atomic ratio: Ce 57%Al 10%Ni 12.5%Cu 10.5%Nb 10%) composition ratio Place the prepared materials evenly in the electric arc furnace crucible, and then cover the furnace cover , vacuumed to 6.0×10 -3 After Pa, fill the furnace with high-purity Ar gas with a purity of 99.9% to dilute the residual gas in the furnace cavity, and then evacuate to 6.0×10 -3 Pa, and then fill the furnace with 0.7 atmospheric pressure of high-purity Ar gas. First smelt pure titanium for 3.5 minutes to consume free oxygen in the vacuum furnace. Then the alloy is smelted to ensure smelting for 100s-110s at a constant power of 20KW. In order to make the composition of the alloy uniform, use an electromagnetic stirring handle to stir, and turn the allo...

Embodiment 3

[0039] The first step: Polish the surface oxide layer of metal materials such as Ce, Al, Ni, Nb and Cu with a purity of not less than 99.9%, and then clean the surface according to Ce47.15g, Al1.59g, Ni4.33g, Cu3.94g, Nb5.49g (the calculated corresponding atomic ratio is: Ce56%Al 10%Ni 12.5%Cu 10.5%Nb 11%) composition ratio Place the prepared materials evenly in the electric arc furnace crucible, and then cover the furnace cover, Vacuum to 7.0×10 -3 Pa and then fill the furnace with high-purity Ar gas with a purity of 99.9% to dilute the residual gas in the furnace cavity, and then evacuate to 7.0×10 -3 Pa, and then fill the furnace with 0.8 atmospheric pressure of high-purity Ar gas. First smelt pure titanium for 3.5 minutes to consume free oxygen in the vacuum furnace. Then smelt the alloy, and ensure that it is smelted at a constant power of 20KW for 100s-110s. In order to make the alloy composition uniform, use an electromagnetic stirring handle to stir, turn the alloy i...

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Abstract

The invention discloses amorphous state alterant for low-alloy cast steel and a preparation method and application of the amorphous state alterant. The refiner is a Ce-Al-Ni-Cu-Nb alloy, and according to the atom percentage composition of the refiner, Ce accounts for (58-x)%, Al accounts for 10%, Ni accounts for 12.5%, Cu accounts for 10.5%, and Nb accounts for (9+x)%, wherein x is equal to 0-2. The amorphous state alterant can utilize the effectively refined elements extremely well; compared with rare earth traditional alterant, element waste is avoided, and impurities brought into molten steel by the alterant are reduced; and the structure can be more efficiently refined in an energy saving manner, and performance can be improved.

Description

technical field [0001] The invention belongs to the field of metal materials and metallurgy, in particular to an amorphous modifier for low-alloy cast steel. Background technique [0002] At present, energy regeneration, resource sustainability, and environmental protection are facing very severe challenges. Aerospace, heavy industry, transportation and other fields have put forward higher requirements for material performance in order to save energy, reduce emissions, and protect the environment. Due to the suitable hardenability of low-alloy cast steel, after suitable heat treatment, the microstructure is uniform sorbite, bainite or very fine pearlite, so it has high tensile strength and yield ratio (Generally around 0.85), high toughness and fatigue strength and low ductile-brittle transition temperature and many other advantages, the application in engineering structural materials is expanding day by day. [0003] At present, the demand for alloy steel in industrial dev...

Claims

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Application Information

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IPC IPC(8): C22C45/00C22C33/06B22D11/06
CPCB22D11/06C22C33/06C22C45/00
Inventor 赵维民王英虎梁鑫肖海涛
Owner HEBEI UNIV OF TECH
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