A kind of preparation method of thin-walled part

A technology for thin-walled parts and blanks, which is applied in the field of thin-walled parts preparation, can solve the problems of self-heavy, deformation, and low product yield of thin-walled pads, and can eliminate defects, improve wear resistance, and achieve stable and reliable quality. Effect

CN113059318BActive Publication Date: 2022-06-17XIAN COAL MINING MACHINERY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-06-17

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Abstract

The invention discloses a preparation method of a thin-walled part. The method comprises the following steps: 1. forging; 2. pre-heat treatment; 3. rough processing; 4. deep carburizing; 5. high-temperature tempering; ; 7. Quenching; 8. Low temperature tempering; 9. Finishing to obtain thin-walled parts. The present invention realizes simultaneous carburizing on both ends of the thin-walled part in the thickness direction by opening a plurality of annular grooves on the outer surface of the blank, reduces thermal stress deformation during carburizing, and prevents excessive deformation of the thin-walled part from causing cracks, making the The deformation is identical, which ensures that thin-walled parts will not be deformed by thermal stress due to high temperature creep and self-weight, and makes the surface hardness of thin-walled parts and the thickness of hardened layer uniform, thereby improving the wear resistance of thin-walled parts and ensuring thin-walled parts The quality of the parts is stable and reliable, realizing the preparation of multiple thin-walled parts with uniform performance at one time.
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Description

technical field

[0001] The invention belongs to the technical field of thin-walled parts, and in particular relates to a preparation method of thin-walled parts. Background technique

[0002] The planetary deceleration structure is used in the transmission mechanism of the shearer to transmit torque and achieve the purpose of deceleration. Its structure is divided into two-stage planetary deceleration structure, and the two-stage planetary deceleration structure has a certain axial displacement and has a great impact. In order to solve this problem, Wear-resistant and impact-reducing thin-walled parts are designed between the two-stage planetary deceleration structure. In order to ensure service characteristics, high-quality carburized steel is selected for deep carburizing and quenching treatment to meet the requirements of high wear resistance on the surface and good toughness in the core. technical features.

[0003] Since thin-walled parts require carburizing on both en...

Examples

Embodiment 1

[0043] This embodiment includes the following steps:

[0044] Step 1: Forging: Die forging and punching are performed in sequence after heating the steel raw material to obtain a cylindrical forging billet; the material of the steel raw material is 18Cr2Ni4WA; the initial forging temperature in the die forging process is 1180 ° C, and the final forging temperature is 850℃;

[0045] Step 2, pre-heat treatment: normalizing and high temperature tempering are carried out successively to the cylindrical forging blank obtained in step 1 to obtain a blank; the temperature of the normalizing is 920 ℃, and the temperature of the high temperature tempering is 670 ℃;

[0046] Step 3: Rough machining: rough machining the blank obtained in step 2 to obtain a blank; the rough machining process is: opening a plurality of annular grooves on the outer surface of the blank in a direction perpendicular to the height of the blank; the The blank consists of a support structure and a plurality of ...

Embodiment 2

[0055] This embodiment includes the following steps:

[0056] Step 1: Forging: Die forging and punching are performed in sequence after heating the steel raw material to obtain a cylindrical forging billet; the material of the steel raw material is 20CrNi2Mo; the initial forging temperature in the die forging process is 1140 ° C, and the final forging temperature is 880℃;

[0057] Step 2, pre-heat treatment: normalizing and high temperature tempering are carried out successively to the cylindrical forging blank obtained in step 1 to obtain a blank; the temperature of the normalizing is 950 ℃, and the temperature of the high temperature tempering is 640 ℃;

[0058] Step 3: Rough machining: rough machining the blank obtained in step 2 to obtain a blank; the rough machining process is: opening a plurality of annular grooves on the outer surface of the blank in a direction perpendicular to the height of the blank; the The blank is composed of a support structure and a plurality o...

Embodiment 3

[0067] This embodiment includes the following steps:

[0068] Step 1. Forging: Die forging and punching are performed in sequence after heating the steel raw material to obtain a cylindrical forging blank; the material of the steel raw material is 12Cr2Ni4A; the initial forging temperature in the die forging process is 1160 ° C, and the final forging temperature is 12Cr2Ni4A. 860℃;

[0069] Step 2, pre-heat treatment: normalizing and high temperature tempering are carried out successively to the cylindrical forging blank obtained in step 1 to obtain a blank; the temperature of the normalizing is 920 ℃, and the temperature of the high temperature tempering is 670 ℃;

[0070] Step 3: Rough machining: rough machining the blank obtained in step 2 to obtain a blank; the rough machining process is: opening a plurality of annular grooves on the outer surface of the blank in a direction perpendicular to the height of the blank; the The blank is composed of a support structure and a p...