CN112251577A - Heat treatment process for corrosion-resistant ferrous metal plate - Google Patents
Heat treatment process for corrosion-resistant ferrous metal plate Download PDFInfo
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- CN112251577A CN112251577A CN202011165866.XA CN202011165866A CN112251577A CN 112251577 A CN112251577 A CN 112251577A CN 202011165866 A CN202011165866 A CN 202011165866A CN 112251577 A CN112251577 A CN 112251577A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/30—Stress-relieving
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
- C23C22/62—Treatment of iron or alloys based thereon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Child & Adolescent Psychology (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention relates to the technical field of metal processing technology, in particular to a heat treatment process of a corrosion-resistant ferrous metal plate, which comprises the following steps: (1) firstly, cleaning a ferrous metal plate by acid washing, and then soaking and pretreating the ferrous metal plate by using pretreatment liquid; (2) annealing the pretreated ferrous metal plate; (3) normalizing the annealed ferrous metal plate; (4) tempering the normalized ferrous metal plate; (5) and (6) hardening and tempering. Because the pretreatment is carried out by using the pretreatment, the deformation and the cracking in the heat treatment process can be effectively reduced; the heat treatment is convenient to eliminate the internal stress, the mechanical property required by the work is obtained, and the surface smoothness of the plate is greatly improved, so that the plate has excellent corrosion resistance. Experiments prove that the corrosion resistance of the ferrous metal plate treated by the method is improved by more than 15-20% compared with the corrosion resistance of similar products sold in the market, and the effect is obvious.
Description
Technical Field
The invention relates to the technical field of metal processing technology, in particular to a heat treatment process of a corrosion-resistant ferrous metal plate.
Background
Metals are materials that are shiny, have good electrical conductivity, thermal conductivity and mechanical properties, and have a positive temperature coefficient of resistance. There are 86 kinds of metals in the world, and people generally classify the metals into ferrous metals and non-ferrous metals according to the characteristics of the metals such as color and property. Ferrous metals are mainly iron and its alloys, such as steel, pig iron, ferroalloys, cast iron, etc. Metals other than ferrous metals are referred to as non-ferrous metals.
Chinese patent (publication No. CN108130545A, publication No. 2018.06.08) discloses a ferrous metal rust removing liquid, which comprises the following components in parts by weight: 15-20 parts of hexamethylenetetramine, 15-18 parts of diethyl thiophosphate, 8-10 parts of dioctyl sodium sulfosuccinate, 1-4 parts of benzoic acid, 1-2 parts of potassium chloride and 30-35 parts of deionized water. However, the rust removing liquid only can achieve the rust removing effect, and the corrosion resistance of the ferrous metal cannot be fundamentally improved.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a heat treatment process for corrosion-resistant ferrous metal plates.
In order to achieve the purpose, the invention provides the following technical scheme:
a heat treatment process for a corrosion-resistant ferrous metal plate comprises the following steps:
(1) firstly, cleaning a ferrous metal plate by acid washing, and then soaking and pretreating the ferrous metal plate for 3-5 hours at 80-85 ℃ by using pretreatment liquid; the pretreatment solution is prepared from the following components in parts by weight: 1-2 parts of a stabilizer, 1-3 parts of an emulsifier, 4-6 parts of potassium dichromate, 2-9 parts of polyphosphate, 1-5 parts of sodium fluoride, 5-10 parts of ammonium persulfate, 1-4 parts of coconut acid alkanolamide, 2-7 parts of sodium molybdate, 0.1-0.5 part of hexamethylene tetramine zinc oxide, 15-30 parts of ammonia water and 250 parts of water 200 and sodium chloride;
(2) annealing the pretreated ferrous metal plate: heating to 730-740 ℃, and then naturally cooling;
(3) normalizing the annealed ferrous metal plate: heating to 900-;
(4) tempering the normalized ferrous metal plate: the temperature is 700 and 720 ℃, the heat preservation time is 2 to 4 hours, and then the temperature is cooled to the room temperature;
(5) and (5) tempering to HRC40-45 to obtain the product.
As a further scheme of the invention: the stabilizer in the step (1) is prepared by mixing magnesium stearate and potassium stearate according to the mass ratio of 1-4: 1.
As a further scheme of the invention: the emulsifier in the step (1) is prepared by mixing polyol fatty acid ester and sodium alkyl benzene sulfonate according to the mass ratio of 1: 2-8.
Compared with the prior art, the invention has the beneficial effects that: the ferrous metal plate treated by the method of the invention can effectively reduce deformation and cracking in the heat treatment process due to the pretreatment; the heat treatment is convenient to eliminate the internal stress, the mechanical property required by the work is obtained, and the surface smoothness of the plate is greatly improved, so that the plate has excellent corrosion resistance. Experiments prove that the corrosion resistance of the ferrous metal plate treated by the method is improved by more than 15-20% compared with the corrosion resistance of similar products sold in the market, and the effect is obvious.
Detailed Description
Example 1
A heat treatment process for a corrosion-resistant ferrous metal plate comprises the following steps:
(1) firstly, cleaning a ferrous metal plate by acid washing, and then soaking and pretreating for 3 hours at 80 ℃ by using pretreatment liquid; the pretreatment solution is prepared from the following components in parts by weight: 1 part of stabilizer, 1 part of emulsifier, 4 parts of potassium dichromate, 2 parts of polyphosphate, 1 part of sodium fluoride, 5 parts of ammonium persulfate, 1 part of cocoate alkanolamide, 2 parts of sodium molybdate, 0.1 part of hexamethylenetetramine zinc oxide, 15 parts of ammonia water and 200 parts of water;
(2) annealing the pretreated ferrous metal plate: heating to 730 deg.C, and naturally cooling;
(3) normalizing the annealed ferrous metal plate: heating to 900 ℃, preserving heat for 3 hours, and then cooling to below 300 ℃;
(4) tempering the normalized ferrous metal plate: keeping the temperature at 700 ℃ for 2h, and then cooling to room temperature;
(5) and (5) tempering to HRC40 to obtain the product.
As a further scheme of the invention: the stabilizer in the step (1) is prepared by mixing magnesium stearate and potassium stearate according to the mass ratio of 1: 1.
As a further scheme of the invention: the emulsifier in the step (1) is prepared by mixing polyol fatty acid ester and sodium alkyl benzene sulfonate according to the mass ratio of 1: 2.
Example 2
A heat treatment process for a corrosion-resistant ferrous metal plate comprises the following steps:
(1) firstly, cleaning a ferrous metal plate by acid washing, and then soaking and pretreating for 5 hours at 85 ℃ by using pretreatment liquid; the pretreatment solution is prepared from the following components in parts by weight: 2 parts of a stabilizer, 3 parts of an emulsifier, 6 parts of potassium dichromate, 9 parts of polyphosphate, 5 parts of sodium fluoride, 10 parts of ammonium peroxydisulfate, 4 parts of cocoate alkanolamide, 7 parts of sodium molybdate, 0.5 part of hexamethylenetetramine zinc oxide, 30 parts of ammonia water and 250 parts of water;
(2) annealing the pretreated ferrous metal plate: heating to 740 deg.C, and naturally cooling;
(3) normalizing the annealed ferrous metal plate: heating to 920 ℃, preserving heat for 5 hours, and then cooling to below 300 ℃;
(4) tempering the normalized ferrous metal plate: keeping the temperature at 720 ℃ for 4h, and then cooling to room temperature;
(5) and (5) tempering to HRC45 to obtain the product.
As a further scheme of the invention: the stabilizer in the step (1) is prepared by mixing magnesium stearate and potassium stearate according to the mass ratio of 4: 1.
As a further scheme of the invention: the emulsifier in the step (1) is prepared by mixing polyol fatty acid ester and sodium alkyl benzene sulfonate according to the mass ratio of 1: 8.
Example 3
A heat treatment process for a corrosion-resistant ferrous metal plate comprises the following steps:
(1) firstly, cleaning a ferrous metal plate by acid washing, and then soaking and pretreating for 4 hours at 82 ℃ by using pretreatment liquid; the pretreatment solution is prepared from the following components in parts by weight: 1 part of stabilizer, 2 parts of emulsifier, 5 parts of potassium dichromate, 6 parts of polyphosphate, 4 parts of sodium fluoride, 8 parts of ammonium persulfate, 3 parts of cocoate alkanolamide, 5 parts of sodium molybdate, 0.3 part of hexamethylenetetramine zinc oxide, 25 parts of ammonia water and 220 parts of water;
(2) annealing the pretreated ferrous metal plate: heating to 735 deg.C, and naturally cooling;
(3) normalizing the annealed ferrous metal plate: heating to 910 ℃, preserving heat for 4 hours, and then cooling to below 300 ℃;
(4) tempering the normalized ferrous metal plate: the temperature is 710 ℃, the heat preservation time is 3 hours, and then the temperature is cooled to the room temperature;
(5) and (5) tempering to HRC45 to obtain the product.
As a further scheme of the invention: the stabilizer in the step (1) is prepared by mixing magnesium stearate and potassium stearate according to the mass ratio of 2: 1.
As a further scheme of the invention: the emulsifier in the step (1) is prepared by mixing polyol fatty acid ester and sodium alkyl benzene sulfonate according to the mass ratio of 1: 6.
Example 4
A heat treatment process for a corrosion-resistant ferrous metal plate comprises the following steps:
(1) firstly, cleaning a ferrous metal plate by acid washing, and then soaking and pretreating for 3 hours at 85 ℃ by using pretreatment liquid; the pretreatment solution is prepared from the following components in parts by weight: 1 part of stabilizer, 3 parts of emulsifier, 4 parts of potassium dichromate, 9 parts of polyphosphate, 1 part of sodium fluoride, 10 parts of ammonium peroxydisulfate, 1 part of cocoate alkanolamide, 7 parts of sodium molybdate, 0.5 part of hexamethylenetetramine zinc oxide, 30 parts of ammonia water and 200 parts of water;
(2) annealing the pretreated ferrous metal plate: heating to 730 deg.C, and naturally cooling;
(3) normalizing the annealed ferrous metal plate: heating to 920 ℃, preserving heat for 3 hours, and then cooling to below 300 ℃;
(4) tempering the normalized ferrous metal plate: keeping the temperature at 700 ℃ for 4h, and then cooling to room temperature;
(5) and (5) tempering to HRC40 to obtain the product.
As a further scheme of the invention: the stabilizer in the step (1) is prepared by mixing magnesium stearate and potassium stearate according to the mass ratio of 1: 1.
As a further scheme of the invention: the emulsifier in the step (1) is prepared by mixing polyol fatty acid ester and sodium alkyl benzene sulfonate according to the mass ratio of 1: 8.
Example 5
A heat treatment process for a corrosion-resistant ferrous metal plate comprises the following steps:
(1) firstly, cleaning a ferrous metal plate by acid washing, and then soaking and pretreating for 3 hours at 85 ℃ by using pretreatment liquid; the pretreatment solution is prepared from the following components in parts by weight: 2 parts of a stabilizer, 1 part of an emulsifier, 6 parts of potassium dichromate, 2 parts of polyphosphate, 5 parts of sodium fluoride, 5 parts of ammonium persulfate, 4 parts of cocoate alkanolamide, 2 parts of sodium molybdate, 0.5 part of hexamethylenetetramine zinc oxide, 15 parts of ammonia water and 250 parts of water;
(2) annealing the pretreated ferrous metal plate: heating to 730 deg.C, and naturally cooling;
(3) normalizing the annealed ferrous metal plate: heating to 920 ℃, preserving heat for 3 hours, and then cooling to below 300 ℃;
(4) tempering the normalized ferrous metal plate: keeping the temperature at 720 ℃ for 2h, and then cooling to room temperature;
(5) and (5) tempering to HRC45 to obtain the product.
As a further scheme of the invention: the stabilizer in the step (1) is prepared by mixing magnesium stearate and potassium stearate according to the mass ratio of 1: 1.
As a further scheme of the invention: the emulsifier in the step (1) is prepared by mixing polyol fatty acid ester and sodium alkyl benzene sulfonate according to the mass ratio of 1: 8.
Comparative example
This comparative example is different from example 1 in that it does not undergo the operation of step (1), and the other steps of the method are the same as those of example 1.
Blank control group
The same products are sold in the market.
Experiments prove that the corrosion resistance of the ferrous metal plate treated by the method is improved by more than 15-20% compared with the corrosion resistance of similar products sold in the market, and the effect is obvious.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The heat treatment process of the corrosion-resistant ferrous metal plate is characterized by comprising the following steps:
(1) firstly, cleaning a ferrous metal plate by acid washing, and then soaking and pretreating the ferrous metal plate for 3-5 hours at 80-85 ℃ by using pretreatment liquid; the pretreatment solution is prepared from the following components in parts by weight: 1-2 parts of a stabilizer, 1-3 parts of an emulsifier, 4-6 parts of potassium dichromate, 2-9 parts of polyphosphate, 1-5 parts of sodium fluoride, 5-10 parts of ammonium persulfate, 1-4 parts of coconut acid alkanolamide, 2-7 parts of sodium molybdate, 0.1-0.5 part of hexamethylene tetramine zinc oxide, 15-30 parts of ammonia water and 250 parts of water 200 and sodium chloride;
(2) annealing the pretreated ferrous metal plate: heating to 730-740 ℃, and then naturally cooling;
(3) normalizing the annealed ferrous metal plate: heating to 900-;
(4) tempering the normalized ferrous metal plate: the temperature is 700 and 720 ℃, the heat preservation time is 2 to 4 hours, and then the temperature is cooled to the room temperature;
(5) and (5) tempering to HRC40-45 to obtain the product.
2. The heat treatment process for the corrosion-resistant ferrous metal plate as claimed in claim 1, wherein the pretreatment liquid is prepared from the following components in parts by weight: 1 part of stabilizer, 2 parts of emulsifier, 5 parts of potassium dichromate, 6 parts of polyphosphate, 4 parts of sodium fluoride, 8 parts of ammonium persulfate, 3 parts of cocoate alkanolamide, 5 parts of sodium molybdate, 0.3 part of hexamethylenetetramine zinc oxide, 25 parts of ammonia water and 220 parts of water.
3. The heat treatment process of a corrosion-resistant ferrous metal plate as claimed in claim 1 wherein: the stabilizer in the step (1) is prepared by mixing magnesium stearate and potassium stearate according to the mass ratio of 1-4: 1.
4. A process according to claim 3, wherein the heat treatment process comprises: the stabilizer in the step (1) is prepared by mixing magnesium stearate and potassium stearate according to the mass ratio of 2: 1.
5. The heat treatment process of a corrosion-resistant ferrous metal plate as claimed in claim 1 wherein: the emulsifier in the step (1) is prepared by mixing polyol fatty acid ester and sodium alkyl benzene sulfonate according to the mass ratio of 1: 2-8.
6. The process of claim 5, wherein the heat treatment comprises: the emulsifier in the step (1) is prepared by mixing polyol fatty acid ester and sodium alkyl benzene sulfonate according to the mass ratio of 1: 6.
7. The heat treatment process of a corrosion-resistant ferrous metal plate as claimed in claim 1 wherein: and (3) the step (2) of water-lifting annealing treatment is heating to 735 ℃ and then naturally cooling.
8. The heat treatment process of a corrosion-resistant ferrous metal plate as claimed in claim 1 wherein: and (3) heating to 910 ℃, keeping the temperature for 4h, and then cooling to below 300 ℃.
9. The heat treatment process of a corrosion-resistant ferrous metal plate as claimed in claim 1 wherein: and (4) tempering at the temperature of 710 ℃, keeping the temperature for 3h, and then cooling to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011165866.XA CN112251577A (en) | 2020-10-27 | 2020-10-27 | Heat treatment process for corrosion-resistant ferrous metal plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011165866.XA CN112251577A (en) | 2020-10-27 | 2020-10-27 | Heat treatment process for corrosion-resistant ferrous metal plate |
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| CN112251577A true CN112251577A (en) | 2021-01-22 |
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| CN202011165866.XA Withdrawn CN112251577A (en) | 2020-10-27 | 2020-10-27 | Heat treatment process for corrosion-resistant ferrous metal plate |
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2020
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