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Heat treatment technology of 30CrMnTi steel large-scale spiral bevel gear

A bevel gear and spiral technology, which is applied in the heat treatment process of 30CrMnTi steel large spiral bevel gears, can solve the problems of low impact toughness, etc., and achieve the effects of increasing content, fine grain and high order of organization.

Inactive Publication Date: 2018-11-16
HUBEI WEINENGDA TRANSMISSION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 30CrMnTi steel has higher strength and hardenability than 20CrMnTi steel, but its impact toughness is slightly lower

Method used

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  • Heat treatment technology of 30CrMnTi steel large-scale spiral bevel gear

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A heat treatment process for a 30CrMnTi steel large-scale spiral bevel gear, the chemical element composition and mass percentage of the 30CrMnTi steel passive helical bevel gear are: C: 0.24%, Si: 0.17%, Mn: 0.8%, Cr: 1.0%, Ti: 0.04%, P<0.035%, S<0.035%, the balance is iron, and the heat treatment process includes the following steps:

[0026] S1: Preparation process: cleaning and drying the forging of the spiral bevel gear, and performing anti-carburization treatment on the web between the teeth of the spiral bevel gear;

[0027] S2: Carburizing: Use the method of heating to high temperature. After the gas carburizing furnace is heated to 950-1100 ° C, put the spiral bevel gear into the furnace vertically, exhaust, keep warm for 2.5 hours, and drop 160-180 drops of kerosene during the heat preservation / min, the temperature of the infiltrated layer will drop to 860±10℃ after meeting the requirements;

[0028] S3: heat preservation: heat preservation and soaking for 2...

Embodiment 2

[0035] A heat treatment process for a 30CrMnTi steel large-scale spiral bevel gear. The chemical element composition and mass percentage of the 30CrMnTi steel passive helical bevel gear are: C: 0.32%, Si: 0.37%, Mn: 1.3%, Cr: 1.3%, Ti: 0.12%, P<0.035%, S<0.035%, the balance is iron, and the heat treatment process includes the following steps:

[0036] S1: Preparation process: cleaning and drying the forging of the spiral bevel gear, and performing anti-carburization treatment on the web between the teeth of the spiral bevel gear;

[0037] S2: Carburizing: Use the method of heating to high temperature. After the gas carburizing furnace is heated to 950-1100 ° C, put the spiral bevel gear into the furnace vertically, exhaust, keep warm for 2.5 hours, and drop 160-180 drops of kerosene during the heat preservation / min, the temperature of the infiltrated layer will drop to 860±10℃ after meeting the requirements;

[0038] S3: heat preservation: heat preservation and soaking for 2...

Embodiment 3

[0045] A heat treatment process for a 30CrMnTi steel large-scale spiral bevel gear. The chemical element composition and mass percentage of the 30CrMnTi steel passive helical bevel gear are: C: 0.30%, Si: 0.23%, Mn: 0.9%, Cr: 1.2%, Ti: 0.08%, P<0.035%, S<0.035%, the balance is iron, and the heat treatment process includes the following steps:

[0046] S1: Preparation process: cleaning and drying the forging of the spiral bevel gear, and performing anti-carburization treatment on the web between the teeth of the spiral bevel gear;

[0047] S2: Carburizing: Use the method of heating to high temperature. After the gas carburizing furnace is heated to 950-1100 ° C, put the spiral bevel gear into the furnace vertically, exhaust, keep warm for 2.5 hours, and drop 160-180 drops of kerosene during the heat preservation / min, the temperature of the infiltrated layer will drop to 860±10℃ after meeting the requirements;

[0048] S3: heat preservation: heat preservation and soaking for 2...

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Abstract

The invention provides a heat treatment technology of a 30CrMnTi steel large-scale spiral bevel gear. The spiral bevel gear comprises the following chemical elements (by weight): 0.24-0.32% of C, 0.17-0.37% of Si, 0.8-1.3% of Mn, 1.0-1.3% of Cr, 0.04-0.12% of Ti, P being less than 0.035%, S being less than 0.035% and the balance iron. Through anticarburizing treatment, carburization, thermal insulation, two-stage quenching, normalization and tempering and then through machining, a 30CrMnTi steel passive skew / spiral bevel gear with high strength, high impact toughness and high tensile propertyis prepared.

Description

technical field [0001] The invention relates to the technical field of processing mechanical parts, in particular to a heat treatment process for a 30CrMnTi steel large-scale spiral bevel gear. Background technique [0002] In recent years, with the development of the national economy, the demand for shafts and spiral bevel gear parts has increased, and their life and carrying capacity directly affect the economic benefits of machinery manufacturers. Capacity and service life are increasingly important in the machinery industry. Commonly used spiral bevel gears, shafts, and carburized parts need to be forged, cut, and then subjected to heat treatment such as normalizing, carburizing and quenching, and low-temperature tempering to obtain a hard carburized layer on the shallow surface and a good carburized layer on the core. The organization with comprehensive mechanical properties, the structure contains martensite, retained austenite and massive carbide, etc. These organiza...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/28C23C8/22C21D1/18C21D1/60C21D9/32C23F17/00
CPCC22C38/02C21D1/18C21D1/60C21D9/32C21D2211/008C22C38/04C22C38/28C23C8/22C23F17/00
Inventor 陈涛许向阳
Owner HUBEI WEINENGDA TRANSMISSION CO LTD
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