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Method for decreasing silicon content of transformation induced plasticity (TRIP) steel during phase transformation process

A technology of phase change induced plasticity and silicon content, which is applied in the field of phase change induced plasticity steel preparation, can solve the problem of deterioration of hot rolling performance and coating performance, poor toughness of phase change induced plasticity steel continuous casting slabs, and reduction of phase change induction plasticity steel Silicon content and other issues, to achieve the effect of simple hot rolling treatment process, reduce silicon content, and unique and novel methods

Inactive Publication Date: 2016-06-22
CHANGZHOU LANXU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: Although the current phase transformation induced plasticity steel has high yield strength, tensile strength and strong ductility, due to the high silicon content, the continuous casting of phase transformation induction plasticity steel The poor toughness of the billet and the deterioration of the hot rolling performance and coating performance of the steel provide a way to convert the prepared phase transformation induced plasticity steel from a rigid state to a molten state, and then transform the molten state into a fluid state, thereby further Reducing Silicon Content in Phase Transformation Induced Plasticity Steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021]First, weigh 50% solid scheelite, 15% silicon beryllium yttrium, 8% silicon carbide reduced scheelite, 7% silicon beryllium yttrium, 10% silicon reduced scheelite, mix well and put into a container, and add 30% of the mass of the mixture sodium hydroxide and 1 times the mass of the mixture of deionized water, stir and mix, and then add 15% of the mass of the mixture of silicon dioxide powder, continue to stir and mix, and let it stand for 15 minutes. After standing still, take 10% of the mass of the mixture and pour 25% hydrochloric acid into it, stir at 38°C until a semi-permeable membrane sticky substance is produced, and scrape off the sticky substance on the container wall, which is sodium silicate; Then put the obtained sodium silicate in the reaction kettle, and add 40% sodium hydroxide solution with twice the mass of sodium silicate to it, stir evenly, and react at a temperature of 500° C. and a pressure of 8 MPa for 30 minutes. After the reaction is over, reduce ...

example 2

[0024] First, weigh 55% solid scheelite, 18% silicon beryllium yttrium, 9% silicon carbide reduced scheelite, 7.5% silicon beryllium yttrium, 11% silicon reduced scheelite, mix well and put into a container, and add 40% of the mass of the mixture sodium hydroxide and 1.5 times the mass of the mixture of deionized water, stir and mix, then add 20% of the mass of the mixture of silicon dioxide powder, continue to stir and mix, and let it stand for 20 minutes. After standing still, pour 13% of the mass of the mixture into hydrochloric acid with a mass concentration of 25%, stir at 38°C until a semi-permeable membrane sticky substance is produced, and scrape off the sticky substance on the container wall, which is sodium silicate; Then place the obtained sodium silicate in a reaction kettle, and add 2.5 times the mass of sodium silicate to it and a 40% sodium hydroxide solution, stir evenly, and react at a temperature of 530° C. and a pressure of 9 MPa for 35 minutes. After the re...

example 3

[0027] First, weigh 60% solid scheelite, 20% silicon beryllium yttrium, 10% silicon carbide reduced scheelite, 8% silicon beryllium yttrium, 12% silicon reduced scheelite, mix well and put into a container, and add 50% of the mass of the mixture of sodium hydroxide and 2 times the mass of the mixture of deionized water, stir and mix, then add 25% of the mass of the mixture of silicon dioxide powder, continue to stir and mix, and then let it stand for 25 minutes. After standing still, take 15% of the mass of the mixture and pour 25% hydrochloric acid into it, stir at 38°C until a semi-permeable membrane sticky substance is produced, and scrape off the sticky substance on the container wall, which is sodium silicate; Then put the obtained sodium silicate in the reaction kettle, and add 40% sodium hydroxide solution with a mass concentration of 3 times the mass of sodium silicate therein, stir evenly, and react at a temperature of 550° C. and a pressure of 10 MPa for 40 minutes. ...

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Abstract

The invention discloses a method for decreasing silicon content of transformation induced plasticity (TRIP) steel during phase transformation process, and belongs to the technical field of TRIP steel preparation. The technical scheme lies in that the TRIP steel is converted from the rigid state to the molten state, and then is converted from the molten state to the fluid state, so that the silicon content of TRIP steel during phase transformation process is further decreased. Examples prove that the content of silicon in the TRIP steel is decreased, the TRIP steel does not contain precious alloy elements such as Cr, Ni, Mo, and the like, the hot rolling technology is easy and feasible, the welding performance is remarkably improved while relatively high tensile strength and plasticity are achieved, and good impact toughness is achieved.

Description

technical field [0001] The invention discloses a method for reducing the silicon content of phase transformation-induced plastic steel in the phase transformation process, and belongs to the technical field of phase transformation-induced plastic steel preparation. Background technique [0002] Transformation-induced plasticity (TRIP) steel is a new type of steel, which uses a new idea to strengthen and toughen steel, that is, to use the residual austenite in the steel to transform into martensite under the condition of stress and strain. body, so as to achieve the purpose of strengthening, and at the same time, the plasticity of the material will be greatly increased, so that the optimization of strength and toughness can be realized at the same time, which is not available in other steel types. [0003] TRIP steel plate has high yield strength and tensile strength, strong ductility, high stamping ability, yield strength 340-860MPa, tensile strength 640-1080MPa, elongation ...

Claims

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Application Information

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IPC IPC(8): C22C33/04C21D1/26C21D8/02
CPCC22C33/04C21D1/26C21D8/0226C22C33/006
Inventor 汪巍张明
Owner CHANGZHOU LANXU CHEM CO LTD