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High-speed tool steel and preparation method thereof

A high-speed tool steel, mass percentage technology, applied in the field of mold steel, can solve the problems of insufficient bending strength and hardness, inability to meet the processing requirements of high-performance parts, low impact toughness, etc., and achieve the effect of excellent mechanical properties

Inactive Publication Date: 2020-09-11
樟树市兴隆高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of the existing high-speed tool steel can only meet the cutting requirements of general materials. For high-performance parts, the bending strength and hardness of the existing high-speed tool steel are still not high enough, and the impact toughness is low, which cannot meet the high performance requirements. Processing requirements of parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A high-speed tool steel, in terms of mass percentage, has the following components: C: 0.45%, Si: 0.02%, Mn: 0.15%, P: 0.01%, Se: 0.02%, Ti: 3.35%, Zr: 1.11% , Mo: 2.56%, fullerene: 0.03%, the balance is Fe and unavoidable impurity elements, and the sum of the mass percentages of each component is 100%.

[0032] In this embodiment, the high-speed tool steel preparation method, the specific steps are as follows:

[0033] The batching is carried out according to the mass percentage of the components contained in the high-speed tool steel, melted in an electric arc furnace, the melting temperature is 1700 ° C, the melting time is 2 hours, blowing argon gas and stirring and refining for 1 hour, and the primary molten steel is obtained; the primary molten steel is dried to obtain a mixture powder; the dried mixed powder is loaded in a bag for vacuum degassing treatment and the bag is sealed; the sealed bag loaded with the mixed powder is subjected to hot isostatic pressing, ...

Embodiment 2

[0035] A high-speed tool steel has the following components in terms of mass percentage: C: 0.50%, Si: 0.09%, Mn: 0.24%, P: 0.02%, Se: 0.03%, Ti: 3.49%, Zr: 1.17% , Mo: 3.04%, fullerene: 0.09%, the balance is Fe and unavoidable impurity elements, and the sum of the mass percentages of each component is 100%.

[0036] In this example, the preparation method of high-speed tool steel, the specific steps are as follows: batching according to the mass percentage of the components contained in high-speed tool steel, melting in an electric arc furnace, the melting temperature is 1780 °C, the melting time is 2.2h, blowing argon Stir and refine for 1.5 hours to obtain primary molten steel; dry the primary molten steel to obtain mixed powder; load the dried mixed powder in a sheath for vacuum degassing and seal the sheath; The sealing sheath of the mixed powder is subjected to hot isostatic pressing, and the temperature of the hot isostatic pressing is 1000° C., so that the mixed powder...

Embodiment 3

[0038] A high-speed tool steel, in terms of mass percentage, has the following components: C: 0.45%, Si: 0.03%, Mn: 0.36%, P: 0.03%, Se: 0.04%, Ti: 3.66%, Zr: 1.23% , Mo: 4.05%, fullerene: 0.37%, the balance is Fe and unavoidable impurity elements, and the sum of the mass percentages of each component is 100%.

[0039] In this example, the preparation method of high-speed tool steel, the specific steps are as follows: batching according to the mass percentage of the components contained in high-speed tool steel, melting in an electric arc furnace, the melting temperature is 1700 ° C, the melting time is 2.5h, blowing argon Stir and refine for 2 hours to obtain primary molten steel; dry the primary molten steel to obtain mixed powder; load the dried mixed powder in a sheath for vacuum degassing and seal the sheath; The sealed sheath of the powder is subjected to hot isostatic pressing, and the temperature of the hot isostatic press is 1200° C., so that the mixed powder forms a ...

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Abstract

The invention discloses high-speed tool steel and a preparation method thereof. The high-speed tool steel comprises the components of 0.45% - 0.70% of C, 0.02% - 0.16% of Si, 0.15% - 0.40% of Mn, 0.01% - 0.03% of P, 0.02% - 0.05% of Se, 3.35% - 3.85% of Ti, 1.11% - 1.28% of Zr, 2.56% - 4.35% of Mo, 0.03% - 0.42% of fullerene, and the balance Fe and inevitable impurity elements. A high-speed tool steel billet body is excellent in mechanical property, the highest hardness of the high-speed tool steel billet body reaches 77 HRC or above, the tensile strength of the high-speed tool steel billet body is 4120 Mpa, and the impact toughness of the high-speed tool steel billet body reaches 92 alphak.

Description

technical field [0001] The invention relates to the technical field of die steel, in particular to a high-speed tool steel. Background technique [0002] High-speed tool steel is mainly used to prepare high-speed cutting tools, such as drill bits, milling cutters and band saws. High-speed tool steel is a tool steel commonly used in Mo-series high-speed steel. After years of development, on the basis of the original M1 steel , the content of carbon and vanadium is appropriately increased, and the cutting performance is significantly improved, so it becomes a general-purpose steel with better red hardness, toughness and wear resistance. The service hardness of high-speed tool steel after heat treatment can reach above HRC63, and it can still maintain high hardness at a working temperature of about 600 ° C, and its toughness, wear resistance and heat resistance are all good. The main alloying elements of the annealed high-speed tool steel are tungsten, molybdenum, chromium, va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/60C22C38/14C22C38/12C22C33/02B22F3/15
CPCB22F3/15C22C33/0264C22C38/02C22C38/04C22C38/12C22C38/14C22C38/60
Inventor 陈帆陈龙闽
Owner 樟树市兴隆高新材料有限公司
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