CN105420480A

CN105420480A - Basin angle gear annealing process

Info

Publication number: CN105420480A
Application number: CN201510849536.5A
Authority: CN
Inventors: 熊利祥; 刘洪�
Original assignee: CHONGQING SHOUYE MACHINERY MANUFACTURING Co Ltd
Current assignee: CHONGQING SHOUYE MACHINERY MANUFACTURING Co Ltd
Priority date: 2015-11-28
Filing date: 2015-11-28
Publication date: 2016-03-23
Anticipated expiration: 2035-11-28
Also published as: CN105420480B

Abstract

The invention discloses a basin angle gear annealing process which includes the heating step and the cooling step. In the heating step, firstly, the surface of a part is heated to be at the temperature of 800 DEG C to 850 DEG C, the following heating step is conducted in a space heating manner and includes at least two heating time periods, a pause time period is set between every two heating time periods, and as the heating process continues, both the heating time of each heating time period and the pause time of each pause time period are gradually shortened till heating is finished. The basin angle gear annealing process has the beneficial effects of being even to heat, good in annealing effect, high in production efficiency, low in cost and the like, and the mechanical performance of a basin angle gear is greatly improved.

Description

Basin angle tooth annealing process

Technical field

The invention belongs to technical field of metal heat treatment, relate to a kind of basin angle tooth annealing process.

Background technology

Basin angle tooth, also known as dish angle tooth, is widely used in mechanical transmission fields.For ensureing the mechanical property of basin angle tooth, after machining, need to quench to it, the thermal treatment such as annealing.

Annealing refers to and metal is slowly heated to certain temperature, keeps certain hour, then cools with suitable speed, with crystal grain thinning, eliminates unrelieved stress, stable dimensions, reduces distortion and crackle tendency.In the tooth annealing process of basin angle, due to the reason such as Heating temperature, accessory size, in heat-processed, heat is difficult to be delivered to inside parts, causes treatment effect not good, has a strong impact on product performance and the qualification rate that once rolls off the production line.

In prior art, there is the basin angle tooth after by heating to put into solid dielectric, to slow down its speed of cooling, enable heat progressively enter inside parts, but, this type of cooling, its cooling time is longer, affects production efficiency, and need solid dielectric, production cost is higher, for manufacturer, and is not suitable for.

Summary of the invention

In view of this, the invention provides a kind of homogeneous heating, be produced into lower, the basin angle tooth annealing process that efficiency is higher.

Its technical scheme is as follows:

A kind of basin angle tooth annealing process, comprise heating and cooling process, first piece surface is heated to 800 ~ 850 DEG C when described heat-processed starts, subsequent heat process is carried out according to clearance heating mode, comprise at least two heating interval, between every two heating interval, be provided with a blocking period, and along with the carrying out of heat-processed, the heat-up time of each heating interval, the time out of each blocking period reduce all gradually, until heating terminates.

Adopt clearance heating mode, basin angle tooth in heat-processed, in the gap of each heating interval, namely during the blocking period, heat progressively can enter into inside parts, outside temperature reduces gradually simultaneously, reduces internal-external temperature difference, when the second heating interval heats, its uniform heat distribution, improve inside parts metallurgical structure, obtain ideal annealing effect with this, promote the mechanical property of basin angle tooth.

As preferably, described heat-processed comprises the steps:

S1: the first heating interval, heat-up time is 16 ~ 18s;

S2: the first blocking period, time out is 6 ~ 10s;

S3: the second heating interval, heat-up time is 6 ~ 10s;

S4: the second blocking period, time out is 4 ~ 6s;

S5: the three heating interval, heat-up time is 4 ~ 6s;

S6: the three blocking period, time out is 2 ~ 3s;

S7: the four heating interval, heat-up time is 2 ~ 3s;

S8: terminate.

This heat-processed can meet the heating requirements during basin angle tooth return of goods of most of gauge size.

Control Heating temperature for convenience, described heat-processed adopts solid-state induction heating equipment to carry out.

Described process of cooling is air cooling, compares the type of cooling adopting solid dielectric, improves cooling efficiency, accelerate productive temp.

Described every period of heat-up time and time out are that Geometric Sequence reduces gradually, and adopt which to be easy to calculate and automatically control heating and time out, heats is also more desirable simultaneously.

Beneficial effect:

Adopt the basin angle tooth annealing process of above technical scheme, have homogeneous heating, annealing effect is good, and production efficiency is high, low cost and other advantages, greatly improves the mechanical property of basin angle tooth.

Accompanying drawing explanation

Fig. 1 is the process flow sheet according to the embodiment of the present invention.

Embodiment

Below in conjunction with embodiment and accompanying drawing, the invention will be further described.

A kind of basin angle tooth annealing process, wherein, basin angle teeth material is 20CrMnTiH1, and this technique comprises heat-processed and process of cooling, and heat-processed adopts solid-state induction heating equipment to heat, and process of cooling adopts cooling air mode.

When heat-processed starts, first by piece surface heating temperatures to 800 ~ 850 DEG C, subsequent heat process is carried out according to clearance heating mode, comprise at least two heating interval, be generally 3 ~ 10 heating interval, be provided with a blocking period between every two heating interval, and along with the carrying out of heat-processed, the heat-up time of each heating interval, the time out of each blocking period all reduce gradually by Geometric Sequence.

As shown in Figure 1, in the present embodiment, after piece surface temperature reaches 800 ~ 850 DEG C, adopt four sections of type of heating, its step comprises:

S1: the first heating interval, heat-up time is 16 ~ 18s;

S2: the first blocking period, time out is 6 ~ 10s;

S3: the second heating interval, heat-up time is 6 ~ 10s;

S4: the second blocking period, time out is 4 ~ 6s;

S5: the three heating interval, heat-up time is 4 ~ 6s;

S6: the three blocking period, time out is 2 ~ 3s;

S7: the four heating interval, heat-up time is 2 ~ 3s;

S8: terminate.

Finally it should be noted that; foregoing description is only the preferred embodiments of the present invention; those of ordinary skill in the art is under enlightenment of the present invention; under the prerequisite without prejudice to present inventive concept and claim; can make like multiple types and representing, such conversion all falls within protection scope of the present invention.

Claims

1. a basin angle tooth annealing process, comprise heating and cooling process, it is characterized in that: when described heat-processed starts, first piece surface is heated to 800 ~ 850 DEG C, subsequent heat process is carried out according to clearance heating mode, comprise at least two heating interval, between every two heating interval, be provided with a blocking period, and along with the carrying out of heat-processed, the heat-up time of each heating interval, the time out of each blocking period reduce all gradually, until heating terminates.

2. basin angle according to claim 1 tooth annealing process, is characterized in that: described heat-processed comprises the steps:

S1: the first heating interval, heat-up time is 16 ~ 18s;

S2: the first blocking period, time out is 6 ~ 10s;

S3: the second heating interval, heat-up time is 6 ~ 10s;

S4: the second blocking period, time out is 4 ~ 6s;

S5: the three heating interval, heat-up time is 4 ~ 6s;

S6: the three blocking period, time out is 2 ~ 3s;

S7: the four heating interval, heat-up time is 2 ~ 3s;

S8: terminate.

3. basin angle according to claim 2 tooth annealing process, is characterized in that: described heat-processed adopts solid-state induction heating equipment to carry out.

4. the basin angle tooth annealing process according to claim 1 or 2 or 3, is characterized in that: described process of cooling is air cooling.

5. the basin angle tooth annealing process according to claim 1 or 2 or 3, is characterized in that: described every period of heat-up time and time out are that Geometric Sequence reduces gradually.