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Abrasion-resistant taper-shank twist drill and preparation method thereof

A twist drill and taper shank technology, which is applied in the direction of manufacturing tools, heat treatment equipment, coatings, etc., can solve the problems of difficult heat dissipation and disadvantages, improve stamping resistance and high temperature resistance, prolong service life, and increase tempering Effect of Stability and Abrasion Resistance

Inactive Publication Date: 2016-08-24
HEXIAN LONGSHENG PRECISION MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to prevent the drill bit from breaking or chipping, the material used should have sufficient bending strength and toughness; at the same time, when the drill bit is continuously drilling, its cutting edge is completely surrounded by metal chips, and the heat generated is not easy to dissipate, especially when drilling deep holes. more unfavorable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A wear-resistant tapered shank twist drill, including substances in parts by weight: carbon 0.88%, chromium 5.6%, tungsten 5.1%, vanadium 1.69%, manganese 11.6%, titanium 0.52%, niobium 0.02%, molybdenum 2.9%, zirconium 0.008% , aluminum 1.23%, boron 0.0037%, nitrogen 0.021%, and the balance is iron.

[0023] Aluminum 0.97~1.23%, Boron 0.0024~0.0037%, Nitrogen 0.021~0.026%

[0024] A preparation method of a wear-resistant tapered shank twist drill, comprising the following steps:

[0025] (1) Add ferro-tungsten, ferro-vanadium, ferro-manganese, ferro-titanium, ferro-niobium, ferro-molybdenum, ferro-zirconium and ferro-chrome into the electric furnace, heat and melt, then add aluminum, adjust the composition to the required ratio, deoxidize and remove slag, and add rare earth elements, and then keep warm for 10 minutes to obtain molten steel;

[0026] (2) pouring the molten steel in step (1) to obtain a steel part;

[0027] (3) Heat the steel piece in step (2) to 870°...

Embodiment 2

[0030] A wear-resistant tapered shank twist drill bit, including substances in parts by weight: carbon 0.95%, chromium 3.8%, tungsten 4.5%, vanadium 2.45%, manganese 13.6%, titanium 0.37%, niobium 0.06%, molybdenum 3.2%, zirconium 0.003% , aluminum 1.37%, boron 0.0015%, nitrogen 0.026%, and the balance is iron.

[0031] A preparation method of a wear-resistant tapered shank twist drill, the same as in Example 1.

Embodiment 3

[0033] A wear-resistant tapered shank twist drill bit, including substances in parts by weight: carbon 1.15%, chromium 4.1%, tungsten 5.7%, vanadium 1.65%, manganese 12.3%, titanium 0.43%, niobium 0.05%, molybdenum 2.6%, zirconium 0.004% , aluminum 0.86%, boron 0.0048%, nitrogen 0.02%, and the balance is iron.

[0034] A preparation method of a wear-resistant tapered shank twist drill, the same as in Example 1.

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PUM

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Abstract

The invention discloses an abrasion-resistant taper-shank twist drill and a preparation method thereof. The abrasion-resistant taper-shank twist drill comprises, by weight, 0.88%-1.36% of carbon, 3.8%-5.6% of chromium, 4.5%-6.2% of tungsten, 1.65%-3.55% of vanadium, 11.6%-13.6% of manganese, 0.37%-0.72% of titanium, 0.02%-0.08% of niobium, 2.6%-4.2% of molybdenum, 0.003%-0.008% of zirconium, 0.86%-1.37% of aluminum, 0.0015%-0.0048% of boron, 0.02%-0.028% of nitrogen and the balance iron. The hardness, the strength and the abrasion resistance of the surface of steel are further improved through nitriding treatment. Proportions of the elements are adjusted to make the elements achieve the synergistic effect, the strength, the hardness and the abrasion resistance of the drill are remarkably improved, and the hardness and the abrasion resistance of the drill are further improved through quenching, moderate-temperature tempering and nitriding, so that the service life of the drill is greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of machine tool drill bits, in particular to a wear-resistant tapered shank twist drill bit and a preparation method thereof. Background technique [0002] 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. Due to its high efficiency and economical advantages, drilling plays a key role in the production fields of machinery and electricity. [0003] Twist drills are the most widely used drilling tools, usually in the diameter range of 0.25 to 80 mm. It is mainly composed of a drill part and a shank. There are two spiral grooves in the working part, which are shaped like twists, hence the name. In order to reduce the friction between the guide part and the hole wall during drilling, the diameter of the twist dril...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/32C22C38/18C22C38/12C22C38/04C22C38/14C22C38/06C21D9/22C21D1/18C23C8/26
CPCC21D1/18C21D9/22C22C38/001C22C38/04C22C38/06C22C38/12C22C38/14C22C38/18C22C38/32C23C8/26
Inventor 韩年珍程华程士弟
Owner HEXIAN LONGSHENG PRECISION MACHINERY CO LTD
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