CN104805267A - Heat treatment process of gear - Google Patents

Abstract

The invention relates to the technical field of metal heat treatment, in particular to a heat treatment process of a gear. The heat treatment process comprises the following steps: step 1, putting the gear into a carburizing furnace and performing initial preheating at a first temperature, wherein the first temperature is 40 degrees lower than the phase change temperature; step 2, carburizing: carrying out carburizing at the temperature of 800 DEG C for 10 hours; step 3, tempering: carrying out tempering at the temperature of 550-750 DEG C for 2 hours; after heat preservation, discharging and cooling; step 4, quenching: carrying out quenching at the temperature of 850-900 DEG C; performing heat preservation for 3 hours and cooling; step 5, performing low-temperature tempering at the temperature of 250 DEG C; cooling after tempering for 2 hours. According to the heat treatment process of the gear, disclosed by the invention, the process route design is reasonable, the adaptability is high, the service requirements of processed gears can be ensured, and the deformation of the gear can be effectively restrained.

Description

A kind of thermal treatment process of gear

Technical field

The present invention relates to technical field of metal heat treatment, be specifically related to a kind of thermal treatment process of gear.

Background technology

Gear is the intermeshing mechanical component having tooth of energy, and the application of gear in transmission has occurred very early, and now, gear has been widely used in industrial every field.For the gear of different purposes, according to the difference of its load, also have different requirements to each physical properties on its surface, how according to the different requirements of gear, optimize its heat processing technique, make it meet various property requirements, be the problem needing to solve always.

Summary of the invention

For solving the above-mentioned problems in the prior art, the invention provides a kind of thermal treatment process of gear.

Technique effect of the present invention is achieved through the following technical solutions:

A thermal treatment process for gear, comprises the following steps:

Step one: gear is put into cementing furnace, carries out just preheating with the first temperature, and described first temperature is for being below transformation temperature 40 DEG C;

Step 2: carburizing, temperature 800 DEG C, time 10h;

Step 3: tempering, temperature 550-750 DEG C, time 2h, cooling of coming out of the stove after insulation;

Step 4: quenching; Temperature 850-900 DEG C, cools after insulation 3h;

Step 5: low-temperaturetempering, temperature 250 DEG C; Cool after time 2h.

The invention has the beneficial effects as follows:

The thermal treatment process of a kind of gear disclosed in this invention, Process Route is reasonable, and strong adaptability, can ensure the service demand of machining gears, effectively can suppress the distortion of gear.

Embodiment

The present invention is realized by following embodiment:

A thermal treatment process for gear, comprises the following steps:

Step one: gear is put into cementing furnace, carries out just preheating with the first temperature, and described first temperature is for being below transformation temperature 40 DEG C;

Step 2: carburizing, temperature 800 DEG C, time 10h;

Step 3: tempering, temperature 550-750 DEG C, time 2h, cooling of coming out of the stove after insulation;

Step 4: quenching; Temperature 850-900 DEG C, cools after insulation 3h;

Step 5: low-temperaturetempering, temperature 250 DEG C; Cool after time 2h.

Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (1)

1. a thermal treatment process for gear, is characterized in that: comprise the following steps:

Step one: gear is put into cementing furnace, carries out just preheating with the first temperature, and described first temperature is for being below transformation temperature 40 DEG C;

Step 2: carburizing, temperature 800 DEG C, time 10h;

Step 3: tempering, temperature 550-750 DEG C, time 2h, cooling of coming out of the stove after insulation;

Step 4: quenching; Temperature 850-900 DEG C, cools after insulation 3h;

Step 5: low-temperaturetempering, temperature 250 DEG C; Cool after time 2h.