One-time heat treatment method of integral high-speed steel cutter

A heat treatment method and high-speed steel technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of difficult control of tool quality, reduction of tool red hardness, and difficult work, so as to reduce quenching time, reduce energy consumption, The effect of improving productivity

Active Publication Date: 2012-05-16
ZUNYI FENGHUA ELECTROMECHANICAL FITTINGS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the current method can meet the production requirements, it has the following disadvantages: 1) It is difficult to meet the two hardness requirements after heat treatment for smaller tools; To reduce the hardness, it is required to strictly control the heating position,

Method used

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  • One-time heat treatment method of integral high-speed steel cutter
  • One-time heat treatment method of integral high-speed steel cutter
  • One-time heat treatment method of integral high-speed steel cutter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: M2 material countersink heat treatment (such as figure 1 As shown, Ф1=5.5mm, Ф2=12mm, Ф3=8mm, L1=12mm, L2=10mm, L3=60mm)

[0025] (1) Degreasing: Soak the countersink in a chemical degreasing tank at 80°C for 15 minutes, then scrub it with cotton yarn, then wash it with hot water at 90°C, and finally wash it with cold water; the formula of the chemical degreasing tank is: sodium hydroxide 8% , 4% sodium carbonate, 2% sodium silicate, and the balance is water;

[0026] (2) Clamping and drying: Bind the countersink with iron wire, hang the shank upwards and the blade downwards in the drying oven. During the installation and hanging process, try to keep a certain gap between the tools to ensure that the tools are heated evenly. The hanging height is required to be consistent to ensure that the heating position of the knife edge in the salt bath is the same, and then dried at 200°C;

[0027] (3) Preheating: immerse the countersink as a whole in a medium-temp...

Embodiment 2

[0033] Embodiment 2: W18 material countersink heat treatment (such as figure 2 As shown, Ф1=25.3mm, Ф2=12mm, Ф3=22mm, Ф4=24.2mm, Ф5=19.4mm, L1=25mm, L2=98mm, L3=145mm, L4=20mm, H=7.9, α=90o)

[0034] (1) Degreasing: Soak the countersink in a 70°C degreasing tank for 20 minutes, then scrub with cotton yarn, then wash with 80°C hot water, and finally wash with cold water; the chemical degreasing tank formula is: sodium hydroxide 6%, Sodium carbonate 6%, sodium silicate 1%, the balance is water;

[0035] (2) Drying: Bind the countersink drill with iron wire, hang the shank upward and the blade downward in the air resistance heating furnace. During the installation process, try to keep a certain gap between the knives to ensure that the knives are heated evenly. The same hanging height is required to ensure that the heating position of the knife edge in the salt bath is the same, and then dried in a drying oven at 150°C;

[0036] (3) Preheating: immerse the countersink as a who...

Embodiment 3

[0042] Embodiment 3: M2 material end mill heat treatment (such as image 3 with Figure 4 as shown, image 3 Parameters: Ф1=34mm, Ф2=30mm, Ф3=26mm, L1=50mm, L2=108mm, L3=338mm; Figure 4 Parameter: L=32mm)

[0043] (1) Degreasing: Soak the end mill in a chemical degreasing tank at 90°C for 30 minutes, then scrub it with cotton yarn, then wash it with hot water at 100°C, and finally wash it with cold water; the formula of the chemical degreasing tank is: sodium hydroxide 10 %, sodium carbonate 3%, sodium silicate 3%, the balance is water;

[0044] (2) Drying: Use M14 bolts to pass through the hanging plate, and screw the other end into it Figure 4 The handle of the end mill is then dried in a drying oven at 250°C. During drying, the hanging height is required to be consistent to ensure that the heating position of the cutting edge in the salt bath is the same;

[0045](3) Preheating: immerse the end mill as a whole in a medium-temperature salt bath at 840°C, and keep it w...

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Abstract

The invention discloses a one-time heat treatment method of an integral high-speed steel cutter. The method comprises the following steps of: (1) removing oil; (2) baking: the cutter is uniformly baked at a temperature of between 150 and 250 DEG C; (3) preheating; (4) quenching: after the cutter is preheated, the edge is quickly immersed in a salt bath to perform quenching heating, wherein the salt bath heating temperature of a W18 cutter is 1,280+/-10 DEG C, the salt bath heating temperature of an M2 cutter is 1,220+/-10 DEG C, the quenching insulating time is calculated according to tz which equals to 40 plus delta D, after insulation is completed, the cutter is completely immersed in the salt bath to quickly heat the handle of the cutter, and the heating time depends on the size of the cutter; (5) cooling; (6) cleaning; (7) annealing; and (8) subsequently processing. According to the method, the requirements for the edge part and the handle part of the cutter can be simultaneously fulfilled only by one-time heat treatment, secondary heat treatment to the handle part is not required, so that the process period can be shortened, the production efficiency can be improved, and the energy consumption can be reduced.

Description

technical field [0001] The invention relates to the technical field of heat treatment of cutting tools, in particular to a one-time heat treatment method for integral high-speed steel cutting tools. Background technique [0002] High-speed steel is the main material for manufacturing various cutting tools. It is mainly used to manufacture cutting tools with high cutting speed, large cutting volume, high mechanical properties or large size and complex shape, such as reamers, milling cutters, countersinks, boring cutters and drills, etc. . Commonly used are tungsten series and tungsten molybdenum series, the typical grade is W 18 Cr 4 V (referred to as W18) and W 6 Mo 5 Cr 4 V 2 (referred to as M2). The knives made of integral high-speed steel require the hardness of the blade to be HRC63-66, and the hardness of the handle to be HRC30-45. [0003] For the overall high-speed steel tool with different hardness values ​​for the blade and handle, the current method is to p...

Claims

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Application Information

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IPC IPC(8): C21D9/22C21D1/18
Inventor 邓国军
Owner ZUNYI FENGHUA ELECTROMECHANICAL FITTINGS CO LTD
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