CN103981481A - Screw nitriding system and application method - Google Patents

Abstract

Screw nitriding system belongs to the field of heat treatment technology, including pressure gauge, first three-way valve, adjustable pressure relief valve, igniter, second three-way valve, nitriding furnace, third three-way valve, pressure regulating valve, valve , the first generator, the one-way valve and the second generator, the pressure gauge, the first three-way valve, the adjustable pressure relief valve, the igniter, and the second three-way valve are sequentially connected to the nitriding furnace through pipelines, and the first The first three-way valve and the second three-way valve are provided with two respectively, and the first three-way valve and the second three-way valve are respectively connected in parallel with a first generator and a second generator through pipelines. The nitriding technology used in this system can reach the technical index of the original screw process of 80 hours within 40 hours, which improves the nitriding efficiency of the screw and is easy to use.

Description

Screw Nitriding System and Application Method

technical field

The invention relates to a screw nitriding system, mainly a nitriding principle using external catalysis, and belongs to the technical field of heat treatment.

Background technique

Nitriding is a chemical heat treatment process that infiltrates nitrogen atoms into the surface of the workpiece in a certain medium at a certain temperature. Common liquid nitriding, gas nitriding, ion nitriding. The traditional gas nitriding is to put the workpiece in a sealed container, pass it through the flowing ammonia gas and heat it. After a long time of heat preservation, the ammonia gas thermally decomposes to generate active nitrogen atoms, which are continuously adsorbed to the surface of the workpiece and diffuse into the surface layer of the workpiece. , thereby changing the chemical composition and organization of the surface, and obtaining excellent surface properties. And the nitriding time is relatively long, especially in the nitriding process of the screw, it takes 80 hours to achieve a good nitriding effect, resulting in low nitriding efficiency, which is an urgent problem to be solved at present.

Contents of the invention

The purpose of the present invention is to provide a screw nitriding system and a using method.

The problem to be solved by the present invention is the problem of low nitriding efficiency of existing screw rods.

For realizing the purpose of the present invention, the technical scheme that the present invention adopts is:

Screw nitriding system, including pressure gauge, first three-way valve, adjustable pressure relief valve, igniter, second three-way valve, nitriding furnace, third three-way valve, pressure regulating valve, valve, first generator , one-way valve and the second generator, the pressure gauge, the first three-way valve, the adjustable pressure relief valve, the igniter, and the second three-way valve are sequentially connected to the nitriding furnace through pipelines, the first three-way valve and Two second three-way valves are respectively provided, and the first three-way valve and the second three-way valve are respectively connected in parallel with a first generator and a second generator through pipelines.

One end of the first generator is provided with a third three-way valve, a valve, and a one-way valve connected to the first three-way valve through a pipeline, and the other end is provided with a third three-way valve, and the valve is connected to the first three-way valve through a pipeline. Two three-way valves, a pressure regulating valve is arranged between the two third three-way valves.

Both the first generator and the second generator have a double-layer shell structure, and the gap between the shells is 10 cm and filled with water, which are used to absorb ammonia gas when an accident occurs.

The electrolytic solution in the first generator and the second generator is a mixture of C5H5N, C3H6N6, water, CH3NH2, HCl, KNO3, and the mass ratio of each component to the mixture is 17%, 18%, 20%, respectively. 13%, 16%, 16%.

The first generator and the second generator are made of PVC plastic material with a diameter of one meter and have good insulation.

How to use the screw nitriding system: firstly turn on the first generator and the second generator for electrolysis, pass ammonia gas into the pipeline through the pressure gauge, adjust the pressure relief valve to adjust the pressure relief, so that most of the ammonia gas passes through the second A three-way valve, enters the first generator and the second generator, mixes with the electrolytic gas and enters the nitriding furnace through the second three-way valve for rapid nitriding. If the first generator and the second generator If an abnormality occurs inside the pipeline, the pressure in the pipeline will increase sharply. The ammonia gas can be discharged through the adjustable pressure relief valve and the igniter can be used to ignite the ammonia gas to ensure safety. During the nitriding process, it can be adjusted according to the nitriding experience, and the electrolysis of the pressure regulating valve can be adjusted appropriately. The gas and ammonia to achieve the best ratio, get the best nitriding efficiency and quality.

The advantages of the present invention are: the nitriding technology adopted in this system can reach the technical index of the original process of the screw for 80 hours within 40 hours, which improves the nitriding efficiency of the screw and should have a wide market space.

Description of drawings

Fig. 1 is the schematic diagram of screw nitriding system of the present invention;

Figure 2 is an enlarged schematic view of the first generator and the second generator;

In the figure: 1. Pressure gauge 2. First three-way valve 3. Adjustable pressure relief valve 4. Igniter 5. Second three-way valve 6. Nitriding furnace 7. Third three-way valve 8. Pressure regulating valve 9 , valve 10, first generator 11, one-way valve 12, second generator.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in the figure, the screw nitriding system includes pressure gauge 1, first three-way valve 2, adjustable pressure relief valve 3, igniter 4, second three-way valve 5, nitriding furnace 6, third three-way valve 7. Pressure regulating valve 8, valve 9, first generator 10, one-way valve 11 and second generator 12, said pressure gauge 1, first three-way valve 2, adjustable pressure relief valve 3, igniter 4 , The second three-way valve 5 is connected to the nitriding furnace 6 through the pipeline in turn, the first three-way valve 2 and the second three-way valve 5 are provided with two respectively, and the first three-way valve 2 and the second three-way valve 5 pass through A first generator 10 and a second generator 12 are respectively connected in parallel in the pipeline.

One end of the first generator 10 is provided with a third three-way valve 7, a valve 9, and a one-way valve 11 and is connected to the first three-way valve 2 through a pipeline, and the other end is provided with a third three-way valve 7, a valve 9 It is connected to the second three-way valve 5 through a pipeline, and a pressure regulating valve 8 is arranged between the two third three-way valves 7; Carry out work; Check valve 11 can effectively prevent the gas from pouring back and destroying the whole equipment when an accident occurs.

Both the first generator 10 and the second generator 12 have a double-layer shell structure, and the gap between the shells is 10 cm and is filled with water. They are used to absorb ammonia gas in the event of an accident to prevent personnel poisoning and explosion accidents.

The electrolytic solution in the first generator 10 and the second generator 12 is a mixture of C5H5N, C3H6N6, water, CH3NH2, HCl, KNO3, and the mass ratio of each component to the mixture is 17%, 18%, 20% respectively. %, 13%, 16%, 16%, the gas generated by the electrolyte during work can greatly accelerate the nitriding efficiency and achieve complete nitriding in 40 hours with the cooperation of this system.

The first generator 10 and the second generator 12 are made of PVC plastic material with a diameter of one meter, have good insulation, and can effectively prevent electric shock accidents during electrolysis.

How to use this system: firstly turn on the first generator 10 and the second generator 12 for electrolysis, pass the ammonia gas into the pipeline through the pressure gauge 1, adjust the pressure relief valve 3 to release the pressure, and make most of the ammonia gas Through the first three-way valve 2, it enters the first generator 10 and the second generator 12, and after being mixed with the electrolytic gas, enters into the nitriding furnace 6 through the second three-way valve 5 for rapid nitriding. Abnormalities occur in the generator 10 and the second generator 12, and the pressure in the pipeline increases sharply. The ammonia gas can be discharged through the adjustable pressure relief valve 3 and ignited by the igniter 4 to ensure safety. According to the experience adjustment, the electrolytic gas and ammonia gas of the pressure regulating valve 8 are properly adjusted to achieve the best ratio, and the best nitriding efficiency and quality are obtained, and the use is simple and convenient.

Claims (6)

1. screw rod nitride system, comprise tensimeter (1), the first T-valve (2), adjustable pressure release valve (3), lighter for ignition (4), the second T-valve (5), nitriding furnace (6), the 3rd T-valve (7), relief valve (8), valve (9), the first producer (10), check valve (11) and the second producer (12), it is characterized in that: described tensimeter (1), the first T-valve (2), adjustable pressure release valve (3), lighter for ignition (4), the second T-valve (5) accesses nitriding furnace (6) by pipeline successively, the first T-valve (2) and the second T-valve (5) are respectively equipped with two, the first T-valve (2) and the second T-valve (5) are parallel with respectively the first producer (10) by pipeline, the second producer (12).

2. screw rod nitride system according to claim 1, it is characterized in that: described the first producer (10) one end is provided with the 3rd T-valve (7), valve (9), check valve (11) and receives the first T-valve (2) by pipeline, the other end is provided with the 3rd T-valve (7), valve (9) is linked into the second T-valve (5) by pipeline, between two the 3rd T-valve (7), is provided with relief valve (8).

3. screw rod nitride system according to claim 1, is characterized in that: described the first producer (10), the second producer (12) are double-layer shell structure, and body clearance is 10cm and is full of water, while meeting accident for absorbing ammonia.

4. screw rod nitride system according to claim 1, it is characterized in that: the electrolytic solution in described the first producer (10), the second producer (12) is the mixture of C5H5N, C3H6N6, water, CH3NH2, HCl, KNO3, and the mass ratio that each composition accounts for mixture is respectively 17%, 18%, 20%, 13%, 16%, 16%.

5. screw rod nitride system according to claim 1, is characterized in that: described the first producer (10), the second producer (12) are PVC plastic material, and diameter is one meter, has good insulativity.

6. the using method based on screw rod nitride system, it is characterized in that: first open the first producer (10), the second producer (12) carries out electrolysis, in pipeline, lead to ammonia by tensimeter (1), adjustable pressure release valve (3) regulates pressure release, make its most of ammonia by the first T-valve (2), enter into the first producer (10), in the second producer (12), after mixing with water electrolytic gas, in entering into nitriding furnace (6), the second T-valve (5) carries out Rapid Nitriding, if the first producer (10), in the second producer (12), occur abnormal, manifold pressure increases severely, can ammonia be lighted by adjustable pressure release valve (3) outer row while lighter for ignition (4), to guarantee safety, in nitridation process, can regulate according to the experience of nitrogenize, gas and the ammonia of suitably adjusting the electrolysis of relief valve (8) reach best ratio, obtain best nitrogenize efficiency and quality.