Preparation method of high manganese steel

A technology for high-manganese steel and molten steel, which is applied in the field of high-manganese steel preparation, can solve the problems of low production efficiency, high density, large material loss, etc., and achieve the effect of improving the yield of alloys

Active Publication Date: 2016-08-10
GUANGDONG INST OF NEW MATERIALS +1
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The degree is large, the production efficiency is low, and the Mn x o y , Fe x o y 、Cr x o y When the oxides enter the slag, Mn, Fe, and Cr cannot be reduced and returned to the molten steel, resulting in a large material loss, and the cleanliness of the molten steel cannot be guaranteed in the subsequent tapping and pouring process.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Put the steel scrap into the furnace to melt; after the steel scrap is completely melted, introduce oxygen, the pressure is 0.42MPa, and the time is 6 minutes. High manganese steel composition requirements, add electrolytic manganese, pig iron, high-carbon ferromanganese, low-carbon ferrochrome, melt, create new slag, add 1.3% of 60% aluminum-20% silicon-20% calcium alloy after melting for deoxidation; in molten steel Sprinkle 0.25% of 1% carbon-50% silicon-49% calcium composite powder into the slag and keep it for 6 minutes; pass argon gas into the molten steel at a pressure of 0.42MPa and keep it for 6 minutes; pour the molten steel into the baked ladle, Add 0.2% of yttrium-based rare earth to the bottom of the molten steel in advance, tap the steel at 1470°C, pour at 1375°C, and cool to obtain high manganese steel castings. The composition and weight percentage of high manganese steel castings are measured: C: 1.25%, Mn: 13.23%, Cr: 1.82%, Al: 0.03%, Si: 0.65%, Ca: 0...

Embodiment 2

[0019] Put the steel scrap into the furnace to melt; after the steel scrap is completely melted, introduce oxygen at a pressure of 0.45 MPa for 8 minutes, sample and analyze the C content to be 0.07%, the furnace temperature is 1570°C, and the slag content is 2.5%; remove part of the slag, according to High-manganese steel composition requirements, add electrolytic manganese, pig iron, high-carbon ferromanganese, low-carbon ferrochrome, melt, create new slag, add 1.5% of 60% aluminum-20% silicon-20% calcium alloy after melting for deoxidation; in molten steel Sprinkle 0.25% of 1% carbon-50% silicon-49% calcium composite powder into the slag and keep it for 8 minutes; pass argon gas into the molten steel at a pressure of 0.45MPa and keep it for 8 minutes; pour the molten steel into the baked ladle, Add 0.25% of yttrium-based rare earth to the bottom of the molten steel in advance, tap the steel at 1480°C, pour at 1380°C, and cool to obtain high manganese steel castings. The com...

Embodiment 3

[0021] Put the steel scrap into the furnace to melt; after the steel scrap is completely melted, introduce oxygen, the pressure is 0.48MPa, the time is 9 minutes, the sample analysis C content is 0.09%, the furnace temperature is 1580 ℃, and the slag content is 3%; part of the slag is removed, according to High manganese steel composition requirements, add electrolytic manganese, pig iron, high-carbon ferromanganese, low-carbon ferrochrome, melt, create new slag, add 1.8% of 60% aluminum-20% silicon-20% calcium alloy after melting for deoxidation; in molten steel Sprinkle 0.25% of 1% carbon-50% silicon-49% calcium composite powder into the slag and keep it for 9 minutes; pass argon gas into the molten steel at a pressure of 0.48MPa and keep it for 9 minutes; pour the molten steel into the baked ladle, Add 0.3% of yttrium-based rare earth to the bottom of the molten steel in advance, tap the steel at 1490°C, pour at 1385°C, and cool to obtain high manganese steel castings. The ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a preparation method of high manganese steel. The preparation method comprises the following steps: waste steel is heated for melting; oxygen is introduced by 5-10 minutes, the furnace temperature is kept above 1550 DEG C, and the quantity of furnace slag is not lower than 2%; one part of the furnace slag is pushed out, electrolytic manganese, pig iron, high carbon ferromanganese and low carbon ferrochromium are added for melting, and 60% aluminum-20% silicon and 20% calcium alloys by the total quantity of molten steel are added for deoxidation after melting; 1% carbon-50% silicon-49% calcium composite powder by the total quantity of molten steel is spread in the furnace slag of the molten steel for keeping by 5-10 minutes, and argon for heating and dehydration is introduced for keeping by 5-10 minites; and the molten steel is poured in a braked ladle, yttrium base rare earth is preset at the bottom of the ladle, the tapping temperature is 1460-1500 DEG C, the pouring temperature is 1370-1390 DEG C, and the high manganese steel is obtained through solidification cooling. The preparation method of the high manganese steel improves the metallurgy quality of the high manganese steel, reduces the oxygen content, and is suitable for manufacturing of rolled mortar walls, crushed walls, jaw plates, hammer heads, plate hammers, side plates, chain plates and the like.

Description

technical field [0001] The invention relates to a preparation method of high manganese steel. Background technique [0002] High manganese steel materials have been developed for more than 100 years and are often used in impact abrasive wear conditions. However, due to the high manganese content of high manganese steel (11~26%), it is easy to cause high content of inclusions and gases during the preparation process of high manganese steel, such as smelting and casting, and the oxygen content is generally about 200ppm, so that the performance of high manganese steel is greatly improved reduced, taking Mn13 as an example, σ b 600~700MPa, α kv 70~120J / cm 2 , affecting the service life of high manganese steel. Therefore, improving the metallurgical quality and performance of high manganese steel by improving the preparation method of high manganese steel is one of the research directions of high manganese steel. [0003] CN1320148C discloses a high-manganese steel smelting ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C21C7/06C21C7/072
CPCC21C7/0037C21C7/06C21C7/072
Inventor 郑开宏王海艳王娟董晓蓉王秀连农登
Owner GUANGDONG INST OF NEW MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap