A kind of high performance rare earth tool steel and preparation method thereof

A tool steel and high-performance technology, applied in the field of high-performance rare earth tool steel and its preparation, can solve the problem of high production cost, and achieve the effects of improving strength, high tropism, and strengthening grain boundaries

Active Publication Date: 2021-01-22
JIANGXI UNIV OF SCI & TECH +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The patent number is 201410477472.6, which is called low-cost high-speed tool steel for cutting drill bits and its preparation process. It discloses that by reducing the amount of precious metals tungsten and molybdenum, and using titanium-niobium and lanthanum-cerium mixed rare earth for inoculation treatment, the high-speed steel The eutectic grains and eutectic structure are obviously refined, and most of the eutectic carbides become spherical and evenly distributed, which improves the impact toughness, but the amount of tungsten and molybdenum is still high, and the content of titanium, niobium and lanthanum-cerium mixed rare earth Also higher, production costs are still high

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  • A kind of high performance rare earth tool steel and preparation method thereof
  • A kind of high performance rare earth tool steel and preparation method thereof
  • A kind of high performance rare earth tool steel and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0045] Embodiment 1: Preparation of high performance rare earth tool steel

[0046] Its chemical composition and weight percentage are: carbon 0.23%, silicon 0.25%, manganese 0.31%, sulfur 0.002%, phosphorus 0.015%, chromium 1.18%, nickel 2.99%, molybdenum 0.418%, vanadium 0.015%, lanthanum cerium alloy 0.012%, The balance is iron.

[0047](1) Smelting, mixing pure iron, metallic chromium, ferrochromium nitride, electrolytic nickel, ferrovanadium, ferrosilicon, and ferromanganese according to the chemical composition and weight percentage of high-performance rare earth tool steel and putting them into an intermediate frequency induction furnace for melting Molten steel is formed at a temperature of 1590-1650°C for 1 hour. Through the analysis of the spectral composition in front of the furnace, the missing alloy charge is added until the composition requirements of the molten steel are met; (2) Refining. The chemical composition and weight percentage of the lanthanum-cerium a...

Embodiment 2

[0048] Embodiment 2: Preparation of high performance rare earth tool steel

[0049] Its chemical composition and weight percentage are: carbon 0.20%, silicon 0.22%, manganese 0.30%, sulfur 0.015%, phosphorus 0.013%, chromium 1.20%, nickel 3.10%, molybdenum 0.420%, vanadium 0.020%, lanthanum cerium alloy 0.015%, The balance is iron.

[0050] The preparation method includes the following steps: (1) smelting, mixing pure iron, metal chromium, ferrochrome nitride, electrolytic nickel, ferrovanadium, ferrosilicon and ferromanganese according to the chemical composition and weight percentage of high-performance rare earth tool steel Put it into an intermediate frequency induction furnace and melt it into molten steel at a temperature of 1590-1650°C for 1 hour. Through the analysis of the spectral composition before the furnace, add the missing alloy charge until the molten steel composition requirements are met; (2) Refining, the molten steel is transferred to the refining furnace ...

Embodiment 3

[0051] Embodiment 3: Preparation of high performance rare earth tool steel

[0052] Its chemical composition and weight percentage are: carbon 0.25%, silicon 0.28%, manganese 0.33%, sulfur 0.009%, phosphorus 0.010%, chromium 1.10%, nickel 2.90%, molybdenum 0.410%, vanadium 0.010%, lanthanum cerium alloy 0.010%, The balance is iron.

[0053] The preparation method includes the following steps: (1) smelting, mixing pure iron, metal chromium, ferrochrome nitride, electrolytic nickel, ferrovanadium, ferrosilicon and ferromanganese according to the chemical composition and weight percentage of high-performance rare earth tool steel Put it into an intermediate frequency induction furnace and melt it into molten steel at a temperature of 1590-1650°C for 1 hour. Through the analysis of the spectral composition before the furnace, add the missing alloy charge until the molten steel composition requirements are met; (2) Refining, the molten steel is transferred to the refining furnace ...

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Abstract

The invention discloses a high-performance rare earth tool steel, whose chemical composition and weight percentage are: carbon 0.20-0.25%, silicon 0.20-0.40%, manganese 0.25-0.55%, sulfur ≤ 0.015%, phosphorus ≤ 0.015%, chromium 1.10% ‑1.50%, nickel 2.50‑3.50%, molybdenum 0.410‑0.420%, vanadium 0.010‑0.020%, lanthanum-cerium alloy 0.010‑0.020%, and the balance is iron. In the present invention, by adding an appropriate amount of lanthanum-cerium alloy without adding tungsten, titanium, and niobium, while greatly reducing the cost, it is synergistically promoted with other components in the present invention, so that the prepared tool steel has high impact toughness and high tropism.

Description

technical field [0001] The invention relates to the technical field of tool steel production, in particular to a high-performance rare earth tool steel and a preparation method thereof. Background technique [0002] Tool steel is the steel used to manufacture cutting tools, measuring tools, molds and wear-resistant tools. Tool steel needs to have high hardness and maintain high hardness and red hardness at high temperature, as well as high wear resistance and appropriate toughness. Tool steel is generally divided into carbon tool steel, alloy tool steel and high-speed tool steel. [0003] When the current tool steel is used to produce tools such as drill bits, because the drill bit has high requirements on the impact toughness and isotropy of the steel, the impact toughness and isotropy of the drill bits produced by the existing tool steel cannot meet the requirements. Therefore, a high-performance tool steel is urgently needed to meet the requirements of high impact tough...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46C22C33/04B23P15/32
CPCB23P15/32C22C33/04C22C38/005C22C38/02C22C38/04C22C38/44C22C38/46
Inventor 赖朝彬解正云张真铭高洁付瑜蒋鑫杨小刚秦镜罗迪强赖籽屹李杰郑晓楠黄伟谢科贵叶明青楚希亮付春平
Owner JIANGXI UNIV OF SCI & TECH
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