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Final heat treatment method for steel for cutters

A final heat treatment and cutting tool technology, applied in the field of cutting tool steel, can solve the problems of increased power consumption, expensive cutting tool costs, fast cutting tool wear, etc., and achieve improved wear resistance, good wear resistance and service life, and high strength and hardness. Effect

Active Publication Date: 2018-01-09
青岛钲瑞热处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially for the use environment required for the cutter used in the waste crusher, because the solid waste usually contains sand and gravel, etc., the cutter wears quickly, and the cutter is often replaced every 2 or 3 months, and the cutter is expensive and wears out at the same time. which leads to increased power consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for final heat treatment of steel for knives, wherein the raw material for steel for knives comprises the following elements: C: 0.60%, Si: 0.50%, Mn: 0.50%, Cr: 5.50%, Mo: 0.80%, Co: 1.20% , Al: 0.10%, P<0.01%, S<0.02%, the balance is Fe and unavoidable impurities. The final heat treatment adopts the method of induction heating, puts the roughly machined tool steel into the induction heating furnace, raises the temperature to 450°C at a uniform speed within 3 hours, and the holding time is 1h, and then continues to heat up to 950°C at 50°C / h ℃, the holding time is 3h, air-cooled to room temperature, then heated to 850°C for the second time, water quenched after holding for 1h, stirred the water during quenching, put it into the heating furnace again after water quenching, and raised the temperature to 600°C at 50°C / h Temper at ℃, hold for 1h, cool down to 250℃ with the furnace, and then take out the furnace and air cool to room temperature. Before the final h...

Embodiment 2

[0018] A method for final heat treatment of steel for knives, wherein the raw material for steel for knives comprises the following elements: C: 0.65%, Si: 0.60%, Mn: 0.40%, Cr: 4.50%, Mo: 0.90%, Co: 1.30% , Al: 0.08%, P<0.01%, S<0.02%, the balance is Fe and unavoidable impurities. The final heat treatment adopts the method of induction heating, puts the roughly machined tool steel into the induction heating furnace, raises the temperature to 420°C at a uniform speed within 35h, and the holding time is 0.5h, and then continues to heat up to 420°C at 60°C / h 1000°C, holding time is 2.5h, air-cooled to room temperature, then heated to 820°C for the second time, water quenched after holding for 1h, stirred the water during quenching, put it into the heating furnace again after water quenching, and raised the temperature at 40°C / h Temper at 550°C, hold for 2 hours, cool down to 220°C with the furnace, and then take it out of the furnace and air cool to room temperature. Before the...

Embodiment 3

[0020] A method for final heat treatment of steel for knives, wherein the raw material for steel for knives comprises the following elements: C: 0.70%, Si: 0.80%, Mn: 0.30%, Cr: 4.50%, Mo: 1.20%, Co: 1.50% , Al: 0.10%, P<0.01%, S<0.02%, the balance is Fe and unavoidable impurities. The final heat treatment adopts the method of induction heating, puts the roughly machined tool steel into the induction heating furnace, raises the temperature to 450°C at a uniform speed within 4h, and the holding time is 1h, and then continues to heat up to 1050°C at 80°C / h ℃, the holding time is 3h, air-cooled to room temperature, then heated to 850°C for the second time, water quenched after holding for 2h, stirred the water during quenching, put it into the heating furnace again after water quenching, and raised the temperature to 600°C at 50°C / h Temper at ℃, hold for 2 hours, cool down to 250℃ with the furnace, and then take it out of the furnace and air cool to room temperature. Before the ...

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Abstract

The invention relates to a final heat treatment method of steel for cutters. according to the final heat treatment method, the steel is sequentially subjected to double heating, water quenching and tempering and sectional type heating is particularly carried out during primary heating, and therefore the steel for the cutters can have a relatively high strength, and deformation or cracking, causedby too high cooling speed in the subsequent water quenching process, of the cutters can be avoided; sectional type cooling is adopted in the tempering and cooling process after the steel is subjectedto the water quenching, so that certain help is provided for improving the wear resistance of finished products; and in addition, the steel for the cutters adopts a specific elemental composition andproportion, the content and the proportion of silicon, manganese, chromium, molybdenum and cobalt are tragetedly adjusted, so that the product obtained after the final heat treatment is good in wear resistance and long in service life.

Description

technical field [0001] The invention relates to the field of cutting tool steel, in particular to a final heat treatment method for cutting tool steel. Background technique [0002] The quality of steel for knives should not only be judged from the sharpness or hardness of the knife, but should be comprehensively evaluated from the four aspects of the steel it uses: hardness, corrosion resistance, toughness, and machinability. The most important manufacturing step for the performance of knives is heat treatment. A poor steel with good heat treatment may produce a better edge. Poor or very poor heat treatment may cause a good knife steel to lose it. Some inherent properties of steel, or cause hard steel to become brittle. [0003] Heat treatment can improve the microstructure of steel to meet the required physical requirements. Toughness, hardness, and wear resistance are all properties that can be obtained through heat treatment. To obtain these properties, operations s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/42C21D6/00
CPCY02P10/25
Inventor 刘仕爽
Owner 青岛钲瑞热处理有限公司