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Disk-type shear knife and its heat treating technology

A manufacturing method and technology of disc shears, applied in the direction of manufacturing tools, knives for shearing machine devices, shearing devices, etc., can solve the problems of complex process and high manufacturing cost, and achieve simple heat treatment process, low production cost and low price cheap effect

Inactive Publication Date: 2003-06-18
张云寿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disc scissors made of 9sicr steel, although the hardness can reach H RC More than 50, but the process is complicated and the manufacturing cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0009] Example 1, diameter 352mm, thickness 20mm disc scissor blade, material 45 steel, chemical composition (%): carbon 0.45, silicon 0.35, manganese 0.70. The steel billet is made by forging, rough machining, quenching and tempering treatment, and finishing process. Quenching and tempering process: quenching temperature: 850°C, holding time: 40 minutes, water cooling (circulating water); tempering temperature: 320°C, holding time: 160 minutes .

example 2

[0010] Example 2, 320 millimeters in diameter, 15 millimeters of thickness disc scissors, material 45 steel, chemical composition (%): carbon 0.50, silicon 0.37, manganese 0.80. The steel billet is made by forging, rough machining, quenching and tempering treatment, and finishing process. Quenching and tempering process: quenching temperature: 870 ° C, holding time: 45 minutes, water cooling (circulating water); tempering temperature: 320 degrees, holding time: 225 minutes .

example 3

[0011] Example 3, 180 millimeters in diameter, 10 millimeters of thickness disc scissors, material 45 steel, chemical composition (%): carbon 0.48, silicon 0.30, manganese 0.60. The steel billet is made by forging, rough machining, quenching and tempering treatment, and finishing process. Quenching and tempering process: quenching temperature: 860°C, holding time: 25 minutes, water cooling (circulating water); tempering temperature: 310°C, holding time: 100 minutes .

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Abstract

A disk-type shear knife is made up of No.45 steel with carbon content of 0.45-0.50%. Its heat treating technology features quenching at 850-870 deg.C for 2-3 min / mm, cooling agent, circulating water and tempering at 300-320 deg.C for 8-15 min / mm.

Description

Technical field: [0001] The invention relates to material selection and manufacturing process of disc scissor blades. Background technique: [0002] The disc scissor blades used for stripping of slitting machines are generally made of alloy tool steel, and the commonly used material is 9sicr steel. Product requirements hardness H RC 48-52. The heat treatment process of alloy tool steel to manufacture disc scissors is very complicated. It must first undergo preliminary heat treatment including: spheroidizing annealing, normalizing, low temperature annealing, quenching and tempering, and then quenching. The cooling medium is oil. Disc scissors made of 9sicr steel, although the hardness can reach H RC More than 50, but the process is complicated and the manufacturing cost is high. Invention content: [0003] The object of the present invention is to overcome the disadvantages of the prior art, and provide a method for manufacturing disc scissors, which simplifies the manu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23D35/00C21D9/00
Inventor 张云寿毕光照
Owner 张云寿
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