High-magnesium cold-working mould steel and preparation method thereof

A technology of cold working die steel and high magnesium, which is applied in the field of mold manufacturing, can solve the problems of burning loss, low yield, and low solubility, and achieve the effects of reducing costs, improving solubility, and refining grains

Inactive Publication Date: 2016-01-13
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, due to the high vapor pressure of metal magnesium, magnesium exists in gaseous form after entering molten steel, and the solubility of magnesium in molten steel is very small; meanwhile, magnesium is a kind of active metal, and the burning loss is serious after magnesium is added into molten steel, and the yield is high. The rate is very low; the above two points limit the role of magnesium in steel

Method used

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  • High-magnesium cold-working mould steel and preparation method thereof

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Embodiment 1

[0019] A high-magnesium cold-working die steel, wherein the weight percent of each content component is, The balance is Fe and unavoidable impurities.

[0020] A preparation method of high-magnesium cold-working die steel, comprising the following steps:

[0021] (1) Smelting raw materials including industrial pure iron, ferrosilicon, ferromanganese, ferromolybdenum and ferrovanadium are loaded into the pressurized induction furnace, and the nickel-magnesium alloy is loaded into the feed bin of the pressurized induction furnace;

[0022] (2) Start induction smelting, and at the same time start the external air extraction system to evacuate the smelting system, and control the vacuum degree within 10Pa;

[0023] (3) After the smelting raw materials are melted, pressurize to 1MPa with argon gas, add nickel-magnesium alloy in three times from the silo, add the last batch of nickel-magnesium alloy for 5 minutes, keep the furnace temperature at 1580-1620°C and start pouring;

[0...

Embodiment 2

[0027] A high-magnesium cold-working die steel, wherein the weight percentages of the components are: C: 1.50, Si: 0.40, Mn: 0.40, Cr: 12.0, V: 0.80, Mo: 0.90, Ni: 0.50, Mg: 0.07, The balance is Fe and unavoidable impurities.

[0028] A preparation method of high-magnesium cold-working die steel, comprising the following steps:

[0029] (1) Smelting raw materials including industrial pure iron, ferrosilicon, ferromanganese, ferromolybdenum and ferrovanadium are loaded into the pressurized induction furnace, and the nickel-magnesium alloy is loaded into the feed bin of the pressurized induction furnace;

[0030] (2) Start induction smelting, and at the same time start the external air extraction system to evacuate the smelting system, and control the vacuum degree within 10Pa;

[0031] (3) After the smelting raw materials are melted, argon gas is applied to pressurize to 2MPa, and nickel-magnesium alloy is added from the silo in 4 times. After the last batch of nickel-magnesiu...

Embodiment 3

[0035] A high-magnesium cold-working die steel, wherein the weight percentage of each content component is, C: 1.60, Si: 0.50, Mn: 0.50, Cr: 13.0, V: 0.80, Mo: 1.20, Ni: 0.70, Mg: 0.08, The balance is Fe and unavoidable impurities.

[0036] A preparation method of high-magnesium cold-working die steel, comprising the following steps:

[0037] (1) Smelting raw materials including industrial pure iron, ferrosilicon, ferromanganese, ferromolybdenum and ferrovanadium are loaded into the pressurized induction furnace, and the nickel-magnesium alloy is loaded into the feed bin of the pressurized induction furnace;

[0038] (2) Start induction smelting, and at the same time start the external air extraction system to evacuate the smelting system, and control the vacuum degree within 10Pa;

[0039] (3) After the smelting raw materials are melted, argon is applied to pressurize to 3MPa, and nickel-magnesium alloy is added in 5 times from the silo. After the last batch of nickel-magnes...

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Abstract

The invention relates to high-magnesium cold-working mould steel. The high-magnesium cold-working mould steel is composed of, by weight, 1.40-1.60% of C, 0.30-0.50% of Si, 0.30-0.50% of Mn, 11.0-13.0% of Cr, 0.80% of V, 0.70-1.20% of Mo, 0.4-0.7% of Ni, 0.06-0.08% of Mg, and the balance Fe and inevitable impurities. Grains of the prepared high-magnesium cold-working mould steel are refined, network carbide is reduced, and the properties of abrasion resistance, plasticity, tenacity, fatigue life and the like are improved on the condition of reducing the cost.

Description

technical field [0001] The invention relates to the field of mold manufacturing, in particular to a high-magnesium cold-working mold steel and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's mold manufacturing industry, the domestic demand for mold steel has increased year by year, but most of the domestically produced mold steel is at the middle and low level, and the high-grade mold steel mainly relies on foreign imports. At present, the development and research High-quality die steel has been paid more and more attention by the country. Adding magnesium to die steel can refine grains, purify grain boundaries, denature inclusions, and eliminate reticular carbides, thereby achieving the purpose of improving the service life of die steel. [0003] However, due to the high vapor pressure of metal magnesium, magnesium exists in gaseous form after entering molten steel, and the solubility of magnesium in mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/46C22C33/04
Inventor 李阳姜周华徐光刘聪颍王亚峰曹海波姚聪林胡浩梁轶杰张聪何盼万万
Owner NORTHEASTERN UNIV
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