A kind of preparation method of thin-walled part

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.

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...

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Problems solved by technology

[0003] Since thin-walled parts require carburizing on both ends, in the prior art, since thin-walled parts are thin-walled and easily deformed structures, a single thin-walled part is often used to carburize in a carburizing furnace by hanging across a cross bar, but thin-walled The circumferential direction of the part is perpendicular to the direction of the crossbar and parallel to the direction of gravity, and the thin-walled pad is self-heavy. After carburizing under high temperature conditions for a long time, the thin-walled parts are superimposed by self-weight and high temperature creep, and the deformation is basically uncontrollable. 1. During the quenching process, due to the superposition of tissue stress and thermal stress, great deformation will also occur, resulting in a low product yield, generally only 5% to 10%.

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