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A kind of die steel processing and smelting method

A smelting method and die steel technology, applied in the field of smelting, can solve the problems of insufficient durability, heat resistance and wear resistance, and deformation during use, so as to improve the overall mechanical properties, reduce thermal cracks, and have strong operability Effect

Active Publication Date: 2021-11-12
TIANGONG AIHE SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In some harsh and complex application scenarios, the requirements for mold steel are very high. The existing mold steel is prone to insufficient durability, heat resistance and wear resistance during application, and deformation occurs during use. and other phenomena

Method used

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  • A kind of die steel processing and smelting method

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Effect test

Embodiment 1

[0027] A method for processing and smelting die steel, comprising the following steps:

[0028] Step 1, collecting scrap steel for centralized cleaning and processing for standby;

[0029] Step 2, adding steel scrap into the intermediate frequency furnace, raising the temperature for smelting, and controlling the temperature of the furnace to 1500°C;

[0030] Step 3: After controlling the intermediate frequency furnace to keep the temperature for smelting for 3 hours, add slag to adjust the chemical composition of molten steel. The composition and weight percentage of molten steel are: C: 0.36%, W: 0.8%, Mo: 0.5%, Cr: 4.5 %, V: 0.6%, Mn: 0.3%, Si: 0.85%, P: 0.02% and S: 0.01%, the rest is Fe and unavoidable impurities, then inject a sufficient amount of oxygen into the intermediate frequency furnace, and add the oxidant , make the molten steel undergo oxidation reaction, remove gas, non-metallic impurities and various impurities in the molten steel, and use the temperature re...

Embodiment 2

[0038] A method for processing and smelting die steel, comprising the following steps:

[0039] Step 1, collecting scrap steel for centralized cleaning and processing for standby;

[0040] Step 2, adding steel scrap into the intermediate frequency furnace, raising the temperature for smelting, and controlling the temperature of the furnace to 1600°C;

[0041]Step 3: After controlling the intermediate frequency furnace to keep the temperature for smelting for 5 hours, add slag to adjust the chemical composition of molten steel. The composition and weight percentage of molten steel are: C: 0.43%, W: 1.0%, Mo: 0.7%, Cr: 5.5 %, V: 0.8%, Mn: 0.5%, Si: 1.20%, P: 0.03% and S: 0.015%, the rest is Fe and unavoidable impurities, then inject a sufficient amount of oxygen into the intermediate frequency furnace, and add the oxidant , make the molten steel undergo oxidation reaction, remove gas, non-metallic impurities and various impurities in the molten steel, and use the temperature re...

Embodiment 3

[0049] A method for processing and smelting die steel, comprising the following steps:

[0050] Step 1, collecting scrap steel for centralized cleaning and processing for standby;

[0051] Step 2, adding steel scrap into the intermediate frequency furnace, raising the temperature for smelting, and controlling the temperature of the furnace to 1550°C;

[0052] Step 3: After controlling the intermediate frequency furnace to keep the temperature for 4 hours, add slag to adjust the chemical composition of molten steel. The composition and weight percentage of molten steel are: C: 0.39%, W: 0.9%, Mo: 0.6%, Cr: 5 %, V: 0.7%, Mn: 0.4%, Si: 1.0%, P: 0.025% and S: 0.013%, the rest is Fe and unavoidable impurities, then inject a sufficient amount of oxygen into the intermediate frequency furnace, and add oxidant , make the molten steel undergo oxidation reaction, remove gas, non-metallic impurities and various impurities in the molten steel, and use the temperature released during the ...

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Abstract

The invention discloses a method for processing and smelting mold steel, and specifically relates to the field of smelting technology. Step 1 is to collect scrap steel for centralized cleaning and treatment for standby; step 2 is to add scrap steel to an intermediate frequency furnace and heat up for smelting. The temperature of the furnace is controlled to 1500- 1600°C; step 3, control the intermediate frequency furnace to keep the temperature for smelting for 3-5 hours, then add slag to adjust the chemical composition of molten steel, then inject sufficient oxygen into the intermediate frequency furnace, and add oxidant to make the molten steel undergo oxidation reaction, Remove gas, non-metallic impurities and various impurities in molten steel; the invention has high heat resistance, and by strictly controlling the content of harmful elements P and S, the impact value of the steel is improved, and the anisotropy is also improved. In addition, the fatigue performance is also improved, reducing thermal cracks and improving fatigue performance.

Description

technical field [0001] The invention relates to the technical field of smelting, and more specifically, the invention relates to a method for processing and smelting die steel. Background technique [0002] Steel is a general term for iron-carbon alloys with a carbon content between 0.02% and 2.11% by mass. The chemical composition of steel can vary greatly. Steel containing only carbon elements is called carbon steel (carbon steel) or ordinary steel; in actual production, steel often contains different alloying elements according to different uses, such as: manganese, Nickel, vanadium, etc. [0003] Die steel is a type of steel used to make molds such as cold stamping dies, hot forging dies, and die-casting dies. Mold is the main processing tool for manufacturing parts in industrial sectors such as machinery manufacturing, radio instruments, motors, and electrical appliances. The quality of the mold directly affects the quality of the pressure processing process, the pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04C21D8/00C22C38/22C22C38/24C22C38/02C22C38/04
CPCC21D8/005C22C33/04C22C38/02C22C38/04C22C38/22C22C38/24Y02P10/20
Inventor 朱小坤吴建忠徐文瑛廖俊徐辉霞王帅帅
Owner TIANGONG AIHE SPECIAL STEEL
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