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A method for overcoming heat treatment deformation of blades

A heat treatment deformation and blade technology, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve the problems of low practicability, time-consuming and laborious beating, and inaccurateness, so as to improve stability, easy decarburization, and improve wear resistance sexual effect

Active Publication Date: 2021-04-02
MAANSHAN HENGLIDA MACHINE BLADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for overcoming heat treatment deformation of the blade, so as to solve the problem that the traditional method for processing the heat treatment deformation of the blade proposed in the above-mentioned background technology is to beat with a hammer. question

Method used

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  • A method for overcoming heat treatment deformation of blades
  • A method for overcoming heat treatment deformation of blades
  • A method for overcoming heat treatment deformation of blades

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for overcoming heat treatment deformation of blades, comprising the steps of:

[0021] Step 1: Put the forged blade body into a special mold and fill it with metal liquid. Both the blade body and the metal liquid are made of 65Mn steel (see Table 1 for the specific composition of 65Mn steel);

[0022] Step 2: Put the special mold with the blade body into the box furnace to heat up to 1000-1050°C, and then cool to 430-480°C in the furnace;

[0023] Step 3: Stress-relief annealing. After step 2 is cooled, the special mold for processing the blade body is placed in a box furnace and heated to 500°C-550°C, and kept for 3-4 hours, and then cooled in the furnace to 230-280°C ℃;

[0024] Step 4: Austempering processing, heating to 580°C-620°C in a box furnace for 5-6 minutes, then heating in a salt bath furnace to 815°C-825°C for 3-4 minutes, cooling to 230°C-280°C , and then placed in nitrate salt for isothermal quenching, heated to 300°C-320°C, heating time 20-25m...

Embodiment 2

[0027] A method for overcoming heat treatment deformation of blades, comprising the steps of:

[0028] Step 1: Put the forged blade body into a special mold and fill it with metal liquid. Both the blade body and the metal liquid are made of 65Mn steel;

[0029] Step 2: Put the special mold with the blade body into the box furnace to heat up to 1050-1100°C, and then cool to 450-500°C in the furnace;

[0030] Step 3: Stress relief annealing. After step 2 is cooled, the special mold for processing the blade body is placed in a box furnace and heated to 600 ℃ ~ 650 ℃, and kept for 2.5 ~ 3.5 hours, and then cooled in the furnace to 300 ~ 350°C;

[0031] Step 4: Austempering processing, heating to 600°C-640°C in a box furnace for 3-5 minutes, then heating in a salt bath furnace to 840°C-855°C for 2-3 minutes, cooling to 280°C-330°C , and then put it into nitrate salt for isothermal quenching, heating to 320°C-340°C, heating time 18-23min, after heating, quickly use dry sawdust to ...

Embodiment 3

[0034] A method for overcoming heat treatment deformation of blades, comprising the steps of:

[0035] Step 1: Put the forged blade body into a special mold and fill it with metal liquid. Both the blade body and the metal liquid are made of 65Mn steel;

[0036] Step 2: Put the special mold with the blade body into the box furnace to heat up to 950-1000°C, and then cool to 410-440°C in the furnace;

[0037] Step 3: Stress-relieving annealing process. After step 2 is cooled, the special mold for processing the blade body is placed in a box furnace and heated to 450 ° C ~ 500 ° C, and kept for 3.5 ~ 4.5 hours, and then cooled in the furnace to 160 ~210°C;

[0038] Step 4: Austempering processing. After cooling in step 3, heat to 560°C-600°C in a box furnace for 7-8 minutes, then heat in a salt bath furnace to 790°C-800°C for 4-5 minutes, and cool to 180℃~230℃, then put it into nitrate salt, heat to 280℃~300℃, heating time 22~27min, after heating, quickly use dry sawdust to dry ...

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Abstract

The invention discloses a method for overcoming thermal treatment deformation of blades. The method comprises the following steps that 1, a forged blade blank is placed into a special mold and filledwith molten metal; 2, the temperature is increased to 1,000-1,050 DEG C and decreased to 430-480 DEG C; 3, stress relief annealing is performed; 4, isothermal quenching machining is performed; 5, tempering is performed. According to the method for overcoming thermal treatment deformation, the blade blank is placed into the special mold and filled with the molten metal, thermal treatment is performed, in the thermal treatment process, the phenomenon that the blade deforms is effectively avoided, the blade is manufactured by 65 Mn steel, a large amount of alloy carbides can be formed due to thehigh carbon content of 65 Mn, the stability is improved, meanwhile, the content of alloy elements in martensite is increased, and the hardness is ensured; the undissolved carbides achieve the effectsof refining grains and improving tenacity, meanwhile Si and Mn are main alloy elements, the hardenability of the steel is greatly improved, and the temper resistance is improved.

Description

technical field [0001] The invention relates to the technical field of blade processing, in particular to a method for overcoming heat treatment deformation of blades. Background technique [0002] Heat treatment refers to a metal thermal processing process in which materials are heated, kept warm and cooled in a solid state to obtain the desired structure and properties. In order to make the metal workpiece have the required mechanical properties, physical properties and chemical properties, in addition to reasonable In addition to the selection of materials and various forming processes, heat treatment processes are often essential. [0003] The blade needs to be heat-treated during the processing, but there is a problem of deformation of the blade during the heat treatment process. Even blades of different materials will be more or less deformed. The traditional method of heat treatment deformation of the blade is to use a hammer. Beating, the mode of beating is time-con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/18C21D1/22C21D1/30C21D6/00C22C38/02C22C38/04C22C38/40
CPCC21D1/22C21D1/30C21D6/004C21D6/005C21D6/008C21D9/18C22C38/02C22C38/04C22C38/40
Inventor 张增明谢敏杨威韦昌森陈洋
Owner MAANSHAN HENGLIDA MACHINE BLADE