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Novel high carbon high wolfram fast steel rolling roller and preparation process thereof

A high-speed steel and high-tungsten technology, which is applied in the field of new high-carbon high-tungsten high-speed steel rolls and their preparation, can solve problems such as shedding and increased cost of rolls, and achieve the effects of increasing density and hardness, reducing additives, and good economic benefits

Inactive Publication Date: 2009-06-17
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology

However, the overall content of alloy elements in this roll, especially the content of tungsten, is relatively high, and it is easy to precipitate coarse flake M at the grain boundary. 2 Carbide and matrix shedding caused by C carbide, too high alloy content will also lead to an increase in the cost of the roll

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  • Novel high carbon high wolfram fast steel rolling roller and preparation process thereof

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Embodiment Construction

[0014] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0015] The high-carbon high-tungsten high-speed steel roll of this embodiment is melted by a medium-frequency induction furnace, and contains the following elements by weight percentage: 2.4% carbon, 15.0% tungsten, 3.5% vanadium, 2.0% molybdenum, 6.0% chromium, silicon<1.2%, manganese <1.2%, the rest is iron element and unavoidable impurities, sulfur <0.04% and phosphorus <0.04% are controlled in impurities.

[0016] Carbon is used to obtain a certain amount of carbide hard phase, improve the wear resistance of the roll, and part of the carbon dissolved in the matrix can also improve the hardenability; if the amount is too much, the material is brittle, the thermal cracking resistance is poor, and casting cracks are easy to occur , Therefore, its content is controlled at 2.0-3.0%. Tungsten mainly exists in MC composite carbides and M 2 In C...

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Abstract

The present invention discloses one kind of new high carbon and high tungsten high speed steel roll and its making process, and belongs to the field of high speed steel roll making technology. The high carbon and high tungsten high speed steel roll contains C 2.0-3.0 wt%, W 6.0-18.0 wt%, V 2.0-4.0 wt%, Mo 1.0-3.0 wt%, Cr 3.0-9.0 wt%, Si less than 1.2 wt%, and Mn less than 1.2 wt%, and possesses MC type composite carbide of V and W. The making process of the high carbon and high tungsten high speed steel roll includes heating high carbon and high tungsten high speed steel to 1580-1620 deg.c before deoxidizing, casting at 1400-1500 deg.c and rotary forming while adding stable magnetic field of 0.05-0.25 T to the centrifuging casting mold and rotating the casting mold at 600-1800 rpm speed.

Description

technical field [0001] The invention belongs to the technical field of preparation of high-speed steel rolls, and in particular relates to a novel high-carbon high-tungsten high-speed steel roll and a preparation method thereof. Background technique [0002] In recent years, in order to improve the surface quality of rolled products, rolling precision and reduce costs, many new rolling technologies have been developed, and at the same time, high-speed steel rolls and The development of its preparation method. [0003] The main alloying elements of high-speed steel roll materials are elements such as vanadium, chromium, molybdenum and tungsten. As the main forming element of MC carbide, vanadium can make high-speed steel have high wear resistance; and adding chromium to high-speed steel can Increase the stability of austenite and improve the hardenability of high-speed steel; adding tungsten and molybdenum can cause secondary hardening to ensure that high-speed steel has hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/36C22C33/02C21C7/06B22D13/12B22D27/02
Inventor 李丘林刘伟宋亮
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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