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High-toughness and high-red-hardness high-speed tool steel

A high-speed tool steel and red-hardness technology, applied in the field of tool steel, can solve the problem of high cost of high-speed steel and achieve the effect of reducing production costs

Inactive Publication Date: 2014-02-05
LONGNAN LONGYI HEAVY RARE EARTH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main alloying elements of high-speed steel are tungsten, molybdenum, chromium, cobalt and vanadium, etc. Among them, tungsten, molybdenum, cobalt and vanadium have limited reserves on the earth, and they are all precious and scarce elements, so the cost of high-speed steel is relatively high

Method used

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  • High-toughness and high-red-hardness high-speed tool steel

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Embodiment Construction

[0013] The high-speed tool steel composition table 1 of the embodiment of the present invention (the remainder is Fe and trace impurity elements not specifically indicated), the manufacturing process is: intermediate frequency + external refining + electroslag remelting → electroslag ingot → fast forging, precision forging → Billet or bar stock→rolling mill finished product→annealing→finishing→production of various specifications of forged and rolled materials.

[0014] Table 1 Composition table of high-speed tool steel

[0015] .

[0016] After taking a sample of the above-mentioned examples for heat treatment (quenching + tempering), the hardness and impact toughness at room temperature are tested,

[0017] And the hardness at 600℃, the results are shown in Table 2.

[0018] Table 2 High-speed tool steel properties

[0019]

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Abstract

The invention discloses a high-toughness and high-red-hardness high-speed tool steel which is characterized by comprising the following components by weight percent: 1.2-1.5% of C, 0.2-0.6% of Si, 4.5-5.5% of Cr, 3.5-4.0% of Mo, 0.8-1.5% of V, 1.5-4.5% of W, 0.2-0.8% of Mn, 0.08-1.0% of Zr, 0.1-0.7% of Al, 0.15-1.5% of Re, 0.02-0.1% of N, less than 0.015% of S, less than 0.03% of P and the balance of Fe and trace impurity elements. The high-toughness and high-red-hardness high-speed tool steel has the red hardness and toughness reaching M42 index and does not contain noble element Co; the cost of the high-toughness and high-red-hardness high-speed tool steel is close to that of M2 high-speed steel, but the performances of the high-toughness and high-red-hardness high-speed tool steel are superior to those of the M2 high-speed steel, so that the high-toughness and high-red-hardness high-speed tool steel can be used for replacing M2 and M42 high-speed steel to manufacture high-precision tools and moulds.

Description

Technical field [0001] The invention relates to a tool steel, in particular to a high-speed tool steel with high toughness and high red hardness. Background technique [0002] High-speed tool steel is a high-carbon and high-alloy steel with very high performance. After heat treatment, its hardness can be as high as 63-70HRc, which is the highest hardness among special steels. This steel grade not only has high hardness, but also has good heat resistance, wear resistance and toughness properties, so it has become an important tool material. The sales of high-speed steel tools account for about 45% of the total sales of all tools, which plays an important role in the development of the manufacturing industry. In addition to being used as tools, high-speed steel is also used to make high-end molds, high-temperature bearings, rolls, etc. Some mechanical parts that require high hardness and particularly wear resistance are also non-high-speed steel, such as diesel oil pump nozzles. ...

Claims

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Application Information

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IPC IPC(8): C22C38/28
Inventor 朱福生杨清廖志军杨宇鹏
Owner LONGNAN LONGYI HEAVY RARE EARTH TECH CO LTD
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