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Low-cost high-speed tool steel for cutting drill bit and preparation process of low-cost high-speed tool steel

A high-speed tool steel, low-cost technology, applied in the direction of improving process efficiency, energy efficiency, etc., can solve the problems of rising bar prices, achieve high hardness, fine carbide particle size, and avoid the generation of coarse horn-shaped carbides Effect

Inactive Publication Date: 2014-12-10
丹阳惠达模具材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of bar stock continues to rise, which has brought huge cost pressure to the processing industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A high-speed tool steel for low-cost cutting drill bits, the composition of the material in weight percentage: C: 0.90%; W: 5.20%; Mo: 4.50%; Cr: 4.60%; V: 1.90%; Mn: 0.35%; Si : 0.35%; Al: 0.90%; Nb: 0.10%; La: 0.035%; Ce: 0.035%; Ti: 0.10%; P: ≤ 0.02%; S: ≤ 0.02%; the rest is Fe and inevitable trace impurities , the sum of the chemical composition is 100%.

[0030] Its preparation method comprises the following processes:

[0031] 1. Preparation of consumable electrodes by smelting in Zhongpo induction furnace:

[0032] ① Alkaline crucible smelting is used to prepare ferro-tungsten alloy, ferro-molybdenum alloy, high-carbon ferro-chrome alloy, ferro-aluminum and 40% of waste high-speed steel return material and scrap steel according to the required composition plus the burning loss of each element. Put the waste high-speed steel return material into the bottom of the intermediate frequency furnace crucible, and then fill the upper part of the return material with hi...

Embodiment 2

[0039] A high-speed tool steel for low-cost cutting drill bits, the composition of the material in weight percentage: C: 0.95%; W: 5.40%; Mo: 4.30%; Cr: 4.70%; V: 2.00%; Mn: 0.35%; Si : 0.35%; Al: 1.10%; Nb: 0.20%; La: 0.045%; Ce: 0.045%; Ti: 0.15%; P: ≤ 0.02%; S: ≤ 0.02%; the rest is Fe and inevitable trace impurities , the sum of the chemical composition is 100%.

[0040] Its preparation method is with embodiment one. slightly.

Embodiment 3

[0042] C: 0.99%; W: 5.50%; Mo: 4.10%; Cr 4.50%; V: 2.15%; Mn: 0.45%; Si: 0.40%; Al: 1.30%; Nb: 0.30%; La: 0.06%; : 0.06%; Ti: 0.20%; P: ≤ 0.02%; S: ≤ 0.02%; the rest is Fe and unavoidable trace impurities, the sum of the chemical composition is 100%.

[0043] Its preparation method is with embodiment one. slightly.

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Abstract

The invention discloses low-cost high-speed tool steel for a cutting drill bit and a preparation process of the low-cost high-speed tool steel. The low-cost high-speed tool steel for the cutting drill bit is characterized by comprising the following components in percentage by weight: 0.88-0.99% of C, 4.80-5.60% of W, 3.8-4.50% of Mo, 3.80-4.80% of Cr, 1.80-2.25% of V, 0.25-0.45% of Mn, 0.20-0.40% of Si, 0.70-1.30% of Al, 0.10-0.30% of Nb, 0.03-0.06% of La, 0.03-0.06% of Ce, 0.10-0.20% of Ti, 0-0.03% of P, 0-0.03% of S, the balance of Fe and inevitable trace impurities. High-speed steel bars are prepared by a medium frequency induction furnace and an electroslag remelting process. Compared with the prior art, the low-cost high-speed tool steel for the cutting drill bit has the advantages as follows: the using amount of tungsten, molybdenum and other valuable alloys is reduced, aluminum is added and titanium-niobium-lanthanum-cerium mixed rare earth is used for inoculation, so that austenite grains and an eutectic structure of the high-speed steel are obviously refined, most of eutectic carbides are spheroidized and uniformly distributed, the hardness, the red hardness, the impact toughness and the stickness resistance are improved, the cutting service life is prolonged, and the cost is reduced.

Description

[0001] technical field [0002] The invention belongs to the technical field of high-speed steel materials for cutting tools, and relates to a high-speed tool steel for drill bits, in particular to a low-cost high-speed tool steel for cutting drill bits and a preparation process thereof. Background technique [0003] Drilling is one of the most common processing methods in the current machining field, and it is also the most time-consuming process in machining. It occupies a high proportion in metal cutting processes, which is significantly higher than milling. On some flexible production lines and machining centers, the drilling process occupies a higher proportion. Due to its high efficiency and economical advantages, drilling plays a key role in the production fields of machinery and electricity. However, the rapid wear of the cutting edge is an important factor restricting the drilling quality and the life of the drill bit. For a long time, many scholars and researcher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/28C22B9/18
CPCY02P10/25
Inventor 魏青松王爱华李正阳丁刚张海龙
Owner 丹阳惠达模具材料科技有限公司
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