阅读说明：本技术 一种管廊钢结构板材防变形加工方法 (Deformation-preventing machining method for pipe gallery steel structure plate ) 是由 潘乐军 谢文志 于 2019-09-23 设计创作，主要内容包括：本发明涉及一种管廊钢结构板材防变形加工方法。包括下述步骤：1)板材毛坯；2)码放；3)板材毛坯入炉；4)深冷；5)板材毛坯出炉；6)冷却；7)回火；8)底漆喷漆；9)喷涂耐腐蚀膜。本发明可以在低温-40℃到高温200℃范围内使用,尺寸稳定,变化不超过0.07%,在化工区域较为恶劣的环境下,防止板材受到腐蚀,可以保证板材强度不下降,对管廊起到很好的支撑作用。(The invention relates to an anti-deformation processing method for a pipe gallery steel structure plate. The method comprises the following steps: 1) a plate blank; 2) stacking; 3) feeding the plate blank into a furnace; 4) deep cooling; 5) discharging the plate blank; 6) cooling; 7) tempering; 8) spraying paint on the primer; 9) and spraying a corrosion-resistant film. The invention can be used in the range of low temperature of-40 ℃ to high temperature of 200 ℃, has stable size, does not change more than 0.07 percent, prevents the plate from being corroded in the severe environment of a chemical area, can ensure that the strength of the plate is not reduced, and plays a good role in supporting a pipe gallery.)

1. The deformation-preventing processing method for the pipe gallery steel structure plate is characterized by comprising the following steps of: the method comprises the following steps:

1) plate blank: the plate blank is a sintered piece, and the plate blank is not soaked in anti-rust oil;

2) stacking: stacking the plate blanks in a net disc up and down, neatly stacking, and putting the net disc into a stainless steel hanging basket;

3) feeding the plate blank into a furnace: opening a furnace door when the chamber type deep cooling furnace is in a room temperature state, hoisting a hanging basket filled with a plate blank into the furnace by using a single-arm crane, and closing the furnace door;

4) deep cooling: selecting a corresponding program number, reducing the temperature in the furnace from room temperature to-90 ℃ at a set cooling speed, and preserving the temperature for 2 hours;

5) discharging the plate blank: after the program is finished, wearing anti-freezing gloves, opening the furnace door, and taking out the hanging basket by using the single-arm crane;

6) and (3) cooling: cooling the plate blank for 2 hours at room temperature after the plate blank is taken out of the furnace, and timely wiping the surface of the plate blank to frost to prevent the plate blank from rusting;

7) tempering: after cooling the plate blank, putting the plate blank into a tempering furnace for tempering, wherein the tempering temperature is 180 ℃, and the tempering time is 1 hour;

8) primer painting: cleaning the surface of the tempered plate, removing surface burrs and impurities, spraying a primer, and controlling the thickness of the primer to be 40-50 mu m;

9) spraying a corrosion-resistant film: spraying a corrosion-resistant film within 1 hour of spraying the primer, wherein the thickness is controlled to be 20-25 mu m.

2. The deformation-preventing processing method of the pipe rack steel structure plate material as claimed in claim 1, which is characterized in that: the powder metallurgy piece is a stainless steel powder metallurgy piece.

3. The deformation-preventing processing method for the pipe gallery steel structure plate is characterized by comprising the following steps of: and (4) in the cryogenic process in the step 4), inputting liquid nitrogen into the box-type cryogenic furnace, namely refrigerating by using the latent heat of vaporization of the liquid nitrogen and low-temperature nitrogen.

4. The deformation-preventing processing method for the pipe gallery steel structure plate is characterized by comprising the following steps of: in the deep cooling process in the step 4), the cooling speed is 4 ℃/min and the cooling is executed by a computer program.

5. The deformation-preventing processing method for the pipe gallery steel structure plate is characterized by comprising the following steps of: the total time of the step 6) cooling and the step 7) tempering is not more than 5 hours, so that the cracking of the parts caused by large residual stress in the parts is prevented.

6. The deformation-preventing processing method for the pipe gallery steel structure plate is characterized by comprising the following steps of: step 4) cryrogenic be one time cryrogenic, can repeatedly carry out one step 4) cryrogenic after step 6) cooling and be secondary cryrogenic, after secondary cryrogenic, part hardness improves, but machinability reduces.

Technical Field

The invention relates to a processing method of a steel structure plate, in particular to an anti-deformation processing method of a pipe gallery steel structure plate.

Background

Large steel structures such as lightning rod towers, offshore lighthouses, large reservoir gates, water supply towers, pipe gallery structures in chemical engineering areas and the like are all exposed to the open air and are also all in the corrosion environment of marine atmosphere and industrial atmosphere for a long time. If the long-term use is required without large-area maintenance, the long-acting coating protection is the best in the past, the service life can reach 20-30 years, the maintenance cost is low, obvious economic benefits can be obtained, the size of the plate shows obvious instability and is easy to crack in severe working environments with severe cold or high temperature and severe cold, and the plate is easy to corrode in severe environments in chemical engineering areas, so that the strength of the plate is reduced, and the plate cannot well support the pipe gallery.

Disclosure of Invention

The invention provides the deformation-preventing processing method for the pipe gallery steel structure plate, which is simple to operate, short in process flow, capable of preventing the product from deforming, good in size stability, wide in application range, corrosion-resistant and long in service life.

The technical scheme of the invention is as follows: an anti-deformation processing method for a pipe gallery steel structure plate comprises the following steps:

1) plate blank: the plate blank is a sintered piece, and the plate blank is not soaked in anti-rust oil;

2) stacking: stacking the plate blanks in a net disc up and down, neatly stacking, and putting the net disc into a stainless steel hanging basket;

3) feeding the plate blank into a furnace: opening a furnace door when the chamber type deep cooling furnace is in a room temperature state, hoisting a hanging basket filled with a plate blank into the furnace by using a single-arm crane, and closing the furnace door;

4) deep cooling: selecting a corresponding program number, reducing the temperature in the furnace from room temperature to-90 ℃ at a set cooling speed, and preserving the temperature for 2 hours;

5) discharging the plate blank: after the program is finished, wearing anti-freezing gloves, opening the furnace door, and taking out the hanging basket by using the single-arm crane;

6) and (3) cooling: cooling the plate blank for 2 hours at room temperature after the plate blank is taken out of the furnace, and timely wiping the surface of the plate blank to frost to prevent the plate blank from rusting;

7) tempering: after cooling the plate blank, putting the plate blank into a tempering furnace for tempering, wherein the tempering temperature is 180 ℃, and the tempering time is 1 hour;

8) primer painting: cleaning the surface of the tempered plate, removing surface burrs and impurities, spraying a primer, and controlling the thickness of the primer to be 40-50 mu m;

9) spraying a corrosion-resistant film: spraying a corrosion-resistant film within 1 hour of spraying the primer, wherein the thickness is controlled to be 20-25 mu m.

The powder metallurgy piece is a stainless steel powder metallurgy piece.

And (4) in the cryogenic process in the step 4), inputting liquid nitrogen into the box-type cryogenic furnace, namely refrigerating by using the latent heat of vaporization of the liquid nitrogen and low-temperature nitrogen.

In the deep cooling process in the step 4), the cooling speed is 4 ℃/min and the cooling is executed by a computer program.

The total time of the step 6) cooling and the step 7) tempering is not more than 5 hours, so that the cracking of the parts caused by large residual stress in the parts is prevented.

Step 4) cryrogenic be one time cryrogenic, can repeatedly carry out one step 4) cryrogenic after step 6) cooling and be secondary cryrogenic, after secondary cryrogenic, part hardness improves, but machinability reduces.

The invention has the advantages that: the novel plate can be used in a range from low temperature to 40 ℃ below zero to high temperature of 200 ℃, has stable size, does not change more than 0.07 percent, prevents the plate from being corroded in a severe environment of a chemical engineering area, can ensure that the strength of the plate is not reduced, and plays a good supporting role for a pipe gallery.

Detailed Description

An anti-deformation processing method for a pipe gallery steel structure plate comprises the following steps:

1) plate blank: the plate blank is a sintered piece, and the plate blank is not soaked in anti-rust oil;

2) stacking: stacking the plate blanks in a net disc up and down, neatly stacking, and putting the net disc into a stainless steel hanging basket;

3) feeding the plate blank into a furnace: opening a furnace door when the chamber type deep cooling furnace is in a room temperature state, hoisting a hanging basket filled with a plate blank into the furnace by using a single-arm crane, and closing the furnace door;

4) deep cooling: selecting a corresponding program number, reducing the temperature in the furnace from room temperature to-90 ℃ at a set cooling speed, and preserving the temperature for 2 hours;

5) discharging the plate blank: after the program is finished, wearing anti-freezing gloves, opening the furnace door, and taking out the hanging basket by using the single-arm crane;

6) and (3) cooling: cooling the plate blank for 2 hours at room temperature after the plate blank is taken out of the furnace, and timely wiping the surface of the plate blank to frost to prevent the plate blank from rusting;

7) tempering: after cooling the plate blank, putting the plate blank into a tempering furnace for tempering, wherein the tempering temperature is 180 ℃, and the tempering time is 1 hour;

8) primer painting: cleaning the surface of the tempered plate, removing surface burrs and impurities, spraying a primer, and controlling the thickness of the primer to be 40-50 mu m;

9) spraying a corrosion-resistant film: spraying a corrosion-resistant film within 1 hour of spraying the primer, wherein the thickness is controlled to be 20-25 mu m.

The powder metallurgy piece is a stainless steel powder metallurgy piece.

And (4) in the cryogenic process in the step 4), inputting liquid nitrogen into the box-type cryogenic furnace, namely refrigerating by using the latent heat of vaporization of the liquid nitrogen and low-temperature nitrogen.

In the deep cooling process in the step 4), the cooling speed is 4 ℃/min and the cooling is executed by a computer program.

The total time of the step 6) cooling and the step 7) tempering is not more than 5 hours, so that the cracking of the parts caused by large residual stress in the parts is prevented.

Step 4) cryrogenic be one time cryrogenic, can repeatedly carry out one step 4) cryrogenic after step 6) cooling and be secondary cryrogenic, after secondary cryrogenic, part hardness improves, but machinability reduces.