CN111230008A - Method for surface treatment of metal piece used in forging process - Google Patents
Method for surface treatment of metal piece used in forging process Download PDFInfo
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- CN111230008A CN111230008A CN202010010309.4A CN202010010309A CN111230008A CN 111230008 A CN111230008 A CN 111230008A CN 202010010309 A CN202010010309 A CN 202010010309A CN 111230008 A CN111230008 A CN 111230008A
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- forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J3/00—Lubricating during forging or pressing
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- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/28—Acidic compositions for etching iron group metals
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Abstract
The invention discloses a surface treatment method. The method comprises the following steps: corroding the surface of the metal piece by using an acid solution to form micropores on the surface of the metal piece; drying the surface of the corroded metal piece; and coating a lubricant on the surface of the metal piece with the micropores, wherein the lubricant is adsorbed in the micropores, and a layer of lubricating film is formed on the surface of the metal piece. The invention can effectively improve the surface lubrication effect of the metal piece, reduce the abrasion between the forging die and the forging piece, prolong the service life of the forging die and reduce the production cost.
Description
Technical Field
The invention relates to the technical field of surface treatment, in particular to a method for carrying out surface treatment on a metal piece used in a forging process.
Background
The role of the lubricant is very important in the forging process. The quality of the lubricating effect directly determines the service life of a forging die, the deformation amount, the appearance quality and the like of a forging piece, and finally determines the forging cost.
At present, the forging process adopts a lubricating mode that: and directly covering a layer of oil film on the surface of the workpiece or the die by using a spraying method, a brush coating method or soaking. The traditional lubricating method causes the effect of the lubricant covering the surface to be poor; for example, for materials with high surface smoothness, such as stainless steel, titanium alloy, etc., the lubricant is difficult to cover the surface; when the surface is provided with the raised areas, the lubricant covers the raised surfaces and stands still for a period of time, and the lubricant is easy to fall off.
In view of any of the above technical problems, the present invention provides a novel method for surface treatment of a metal part used in a forging process.
Disclosure of Invention
An object of the present invention is to provide a method for surface treatment of a metal part used in a forging process to solve the problem of difficulty in adhesion of a lubricant to the surface of the metal part in the prior art.
According to an aspect of the present invention, there is provided a method of surface treating a metal part for use in a forging process, the method comprising the steps of:
corroding the surface of the metal piece by using an acid solution to form micropores on the surface of the metal piece;
drying the surface of the corroded metal piece;
and coating a lubricant on the surface of the metal piece with the micropores, wherein the lubricant is adsorbed in the micropores, and a layer of lubricating film is formed on the surface of the metal piece.
Optionally, before the surface of the metal piece is subjected to corrosion treatment, the method further comprises the following steps:
pretreating the surface of the metal piece;
and cleaning and drying the surface of the pretreated metal piece.
Optionally, the surface corrosion treatment of the metal piece with the acid solution comprises: and soaking the surface of the metal piece in the acid solution to form the micropores with the diameter size of 20nm-40 mu m and the depth of 20nm-40 mu m on the surface of the metal piece.
Optionally, the acid solution comprises one or more of oxalic acid, sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, boric acid, formic acid, hydrofluoric acid, gallic acid.
Optionally, the drying temperature range of the drying process is: 75-85 ℃; the drying time is 15 min-25 min.
Optionally, the temperature range of the acid solution is: 40-80 ℃; the soaking time ranges are as follows: 1min-20 min.
Optionally, the acid solution comprises: oxalic acid 20g/L and sulfuric acid 50 g/L.
Optionally, the acid solution comprises: oxalic acid 30g/L and phosphoric acid 200 g/L.
Optionally, the acid solution comprises: 50g/L of sulfuric acid and 20g/L of hydrofluoric acid.
The invention has the beneficial effects that: the invention carries out corrosion treatment on the surface of the metal piece to form micropores; when the lubricant is smeared on the surface, the micropores can adsorb the lubricant, so that a layer of lubricating film is formed on the surface of the metal piece, and the lubricating effect of the surface is effectively improved; when the wear-resistant forging die is applied to a forging die and a forging piece, the wear of the forging die and the forging piece can be reduced, the service life of the forging die is prolonged, and the production cost is reduced.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a flow chart of a method for treating the surface of a metal part according to the present invention.
FIG. 2 is a flow chart of an embodiment of the surface treatment method of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
According to one embodiment of the present invention, a method of surface treating a metal article for use in a forging process. The method comprises the following steps:
s12, corroding the surface of the metal piece by using an acid solution to form micropores on the surface of the metal piece;
the metal piece comprises a forging die and a forging piece in a forging process. For example, the surface of the metal part can be selectively corroded according to the process conditions in the forging process, so that a lubricating film is formed on the surface of the metal part, and the lubricating performance is improved. For example, when the forging conditions are severe or the appearance of the forged part is strictly required, the surfaces of the forging die and the forged part may be subjected to corrosion treatment, and micropores may be formed on the surfaces of the forging die and the forged part.
The micropores have oleophylic characteristics, and the lubricant is absorbed into the micropores at the moment of contact with the lubricant, so that a layer of lubricating film is formed on the surface of the metal piece, and the purpose of efficient lubrication is achieved.
For example, the surface of the metal piece can be soaked in the acid solution, and the micropores with the diameter size of 20nm-40 μm and the depth of 20nm-40 μm are formed on the surface of the metal piece.
S13, cleaning and drying the surface of the corroded metal piece;
wherein the cleaning and drying treatment specifically comprises the following steps: the drying temperature range after the surface is repeatedly washed by clear water is as follows: 15 min-25 min.
And S14, coating lubricant on the surface of the metal piece with the micropores, wherein the micropores absorb the lubricant, and a layer of lubricating film is formed on the surface of the metal piece.
For example, when the surfaces of the forging die and the forging piece are subjected to surface treatment simultaneously and a layer of lubricating film is formed on the surfaces of the forging die and the forging piece, the friction force between the surface of the forging die and the surface of the forging piece is reduced in the process of machining the forging piece, so that the abrasion to the forging die is reduced, and the service life of the forging die is prolonged; on the other hand, the appearance aesthetic feeling of a forged product formed by processing the forged piece is improved.
Optionally, before the surface corrosion treatment of the metal piece with the acid solution, the method further comprises:
s10, preprocessing the surface of the metal piece;
wherein the pretreatment specifically comprises: and wiping the surface of the metal piece by using absorbent cotton dipped with a solvent, removing oil stains, and wiping the metal piece by using clean cotton cloth for several times to finish degreasing treatment.
S21, cleaning and drying the surface of the pretreated metal piece;
wherein the cleaning and drying treatment specifically comprises the following steps: adopting clear water to repeatedly wash the surface of the forging die and then drying, wherein the drying temperature range is as follows: 50-80 ℃.
The surface treatment method for the metal piece used in the forging process provided by the example can be used for preliminarily treating the surface to eliminate dirt and grease on the surface; the surface is subjected to corrosion treatment to form micropores, so that the surface obtains an oleophylic surface micropore appearance, and a lubricating film is formed when the lubricant is coated on the surface, so that the lubricating effect of the surface is effectively improved. When the method is applied to a forging process, the abrasion between the forging die and a forged piece is effectively reduced, the service life of the forging die is prolonged, the production efficiency is improved, the process period is shortened, and the production cost is reduced.
For example, in the forging process, the surface treatment method of the present invention may be used to treat the surface of a forging die and/or the surface of a forged part.
Specifically, the surface treatment of the forging die comprises the following specific steps:
s20, preprocessing the surface of the forging die;
wherein the pretreatment specifically comprises: wiping the surface of the forging die with absorbent cotton wetted with a solvent, removing oil stains, and wiping with clean cotton cloth for several times to finish degreasing treatment.
S21, cleaning and drying the surface of the preprocessed forging die;
wherein the cleaning and drying treatment specifically comprises the following steps: adopting clear water to repeatedly wash the surface of the forging die and then drying, wherein the drying temperature range is as follows: 50-80 ℃.
S22, performing corrosion treatment on the surface of the forging die by using an acid solution to form micropores on the surface of the forging die;
wherein the performing of the corrosion treatment on the surface of the forging die comprises: and inversely suspending and immersing the parting surfaces of the upper die and the lower die of the forging die into an acid solution to form micropores with the diameter size of 20nm-40 mu m and the depth of 20nm-40 mu m on the surface of the forging die.
S23, cleaning and drying the surface of the forging die after the corrosion treatment;
wherein the cleaning and drying treatment specifically comprises the following steps: the drying temperature range after the surface is repeatedly washed by clear water is as follows: 15 min-25 min
And S24, coating a lubricant on the surface of the forging die with the micropores, wherein the lubricant is adsorbed in the micropores, and a layer of lubricating film is formed on the surface of the forging die.
The forging piece is placed in the forging die subjected to surface treatment to be forged to form a forged product, so that the appearance aesthetic feeling of the forged product is improved.
The surface of the forging die is subjected to microstructure treatment in an acid solution corrosion mode, so that the surface of the forging die is provided with a microporous structure which has oleophilic surface microporous characteristics, the lubricant is absorbed into micropores at the moment that the surface of the forging die contacts the lubricant, and a layer of lubricating film is formed on the surface of the forging die; make in forging the course of working, the lubricated film that the forging mould formed can set up for a long time and save on the surface of forging the mould, improve the lubricity on forging the mould surface. When the forging piece is combined with the forging die, the abrasion between the forging piece and the forging die can be reduced, and the service life of the forging die is prolonged.
Optionally, the forging die may be made of: die steel; for example, the die material may be a cold die material or a hot die material, wherein the cold die material may be: DC53, carbon tool steel, low alloy cold work die steel, high speed steel, and the like.
The hot forging die material may be: DIVAR, 3Cr2W8V, CG-2, GR, etc.
Specifically, the surface treatment of the forging piece comprises the following specific steps:
s30, pretreating the surface of the forging piece;
wherein the pretreatment specifically comprises: wiping the surface of the forged piece by using absorbent cotton wetted with a solvent, removing oil stains, and wiping the surface by using clean cotton cloth for several times to finish degreasing treatment.
S31, cleaning and drying the surface of the preprocessed forged piece;
wherein the cleaning and drying treatment specifically comprises the following steps: adopting clear water to repeatedly wash the surface of the forging part and then drying, wherein the drying temperature range is as follows: 50-80 ℃.
S32, adopting acid solution to corrode the surface of the forging piece to form micropores on the surface of the forging piece;
wherein the surface of the forging is subjected to corrosion treatment, and the corrosion treatment comprises the following steps: and soaking the forging piece in an acid solution to form the micropores with the diameter size of 20nm-40 mu m and the depth of 20nm-40 mu m on the surface of the forging piece.
S33, cleaning and drying the surface of the forged piece after corrosion treatment;
wherein the cleaning and drying treatment specifically comprises the following steps: the drying temperature range after the surface is repeatedly washed by clear water is as follows: 15 min-25 min.
And S34, coating a lubricant on the surface of the forging piece with the micropores, wherein the lubricant is adsorbed in the micropores, and a layer of lubricating film is formed on the surface of the forging piece.
The surface of the forging piece is subjected to microstructure treatment in an acid solution corrosion mode, so that the surface of the forging piece is provided with a microporous structure, the microporous structure has oleophilic surface microporous characteristics, the lubricant is absorbed into micropores at the moment that the surface of the forging piece is contacted with the lubricant, a layer of lubricating film is formed on the surface of the forging piece, and when the forging piece is combined with a forging die, the abrasion between the forging piece and the forging die can be reduced, and the service life of the forging die is prolonged.
Optionally, the material of the forged part includes any one of steel and titanium alloy.
In an alternative embodiment, the surface corrosion treatment of the metal piece by the acid solution comprises: and soaking the surface of the metal piece in an acid solution to form the micropores with the diameter size of 20nm-40 mu m and the depth of 20nm-40 mu m on the surface of the metal piece. The inventor finds that: the surface of the metal piece is treated to obtain a surface micropore shape with the size of 20nm-40 mu m, the micropore has the oleophylic characteristic, a lubricant can be absorbed in the micropore structure, a layer of lubricating film is formed on the surface, and the lubricating film can be stored for a long time, so that the lubricating property of the surface is improved; when the treatment mode is applied to forging processing, for example, the surface treatment mode of the invention is adopted to treat the surface of the forging die and/or the surface of the forging piece, the abrasion between the forging die and the forging piece can be reduced, the service life of the forging die is prolonged, and the appearance of the forging piece is improved; meanwhile, by adopting the surface treatment method, the lubricant coated on the surface can not easily fall off, so that the process time is reduced, the production cost is reduced, and the production line environment is improved.
Optionally, the acid solution comprises one or more of oxalic acid, sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, boric acid, formic acid, hydrofluoric acid, gallic acid.
The acid solution further comprises deionized water, wherein the deionized water is pure water from which impurities in the form of ions are removed.
The acid solution is corrosive, micropores can be formed after the surface of the metal piece is corroded by the acid solution, and the micropores have oleophilic property and can prevent the lubricant coated on the surface of the metal piece from falling off.
The inventor finds that: aiming at different materials, different formulas are needed to be adopted to prepare the solution; namely, the acid solution with different degrees of corrosiveness is prepared according to different materials.
Example 1:
the present example surface-treated both the surfaces of the forging die and the forging to improve the life of the forging die and reduce wear between the forging die and the forging.
For example, in this example, the forging die is processed in the following manner:
the forging die is made of DC53, the formula of the acid solution of the DC53 is 20g/L oxalic acid and 50g/L sulfuric acid, the other components are deionized water, the forging die made of the DC53 is immersed in the solution consisting of the oxalic acid, the sulfuric acid and the deionized water, and nano-scale micropores are formed on the surface of the forging die.
Pretreating the forging die, cleaning the pretreated forging die, and drying the die;
inversely suspending and immersing the parting surfaces of the upper die and the lower die of the forging die into a prepared acid solution, wherein the immersion time is 5min, and the temperature of the acid solution is 80 ℃;
drying the forging die after soaking; wherein the drying temperature is 50 ℃ and the drying time is 15 min.
After drying, the surface of the forging die is provided with micropores with the diameter size of 20nm-400nm and the depth of 20nm-400nm, and the surface of the micropores is coated with a lubricant.
The inventor finds that when the solution formula is adopted to carry out surface treatment on DC53, micropores which are uniformly distributed and have consistent structures can be formed on the surface of the solution formula, the diameter sizes of the micropores are all within the range of 20nm-400nm, and the depths of the micropores are all within the range of 20nm-400 nm; the surface of the forged die after corrosion is coated with the lubricant, so that the lubricant can be stored on the surface of the forged die for a long time, and the surface lubricating property of the forged die is improved.
For example, the forged parts of this example were treated in the following manner:
the forging piece is made of 316L stainless steel, the formula of an acid solution of the 316L stainless steel is 30g/L oxalic acid, 200g/L phosphoric acid and the other components are deionized water; a forged piece made of 316L stainless steel is immersed in a solution consisting of oxalic acid, phosphoric acid and deionized water, and nano-scale micropores are formed on the surface of the forged piece.
Pretreating the forging part, cleaning and drying the pretreated forging part;
immersing the forging piece into a prepared acid solution, wherein the temperature of the acid solution is 70 ℃, and the immersion time is 10 min;
drying the forged piece after soaking; wherein the drying temperature is 80 ℃, and the drying time is 20 min;
after drying, the surface of the forging part is provided with nano-scale micropores with the diameter size of 20nm-400nm and the depth of 20nm-400 nm.
The forged product formed by forging the forging die subjected to the surface treatment and the forged piece subjected to the surface treatment has good appearance attractiveness.
The inventor finds that: the forging piece is made of a material suitable for cold forging processing, the surface treatment method is adopted to simultaneously carry out surface treatment on the surface of the forging die and the surface of the forging piece, the service life of the forging die is prolonged by 20%, the processing efficiency is improved by 10%, and the appearance effect of a forging product formed by forging the forging piece is better.
Example 2:
the present example surface-treated both the surfaces of the forging die and the forging to improve the life of the forging die and reduce wear between the forging die and the forging.
For example, in this example, the forging die is processed in the following manner:
the forging die is made of DIVAR, the formula of a DIVAR solution is 20g/L of oxalic acid and 50g/L of sulfuric acid, the other components are deionized water, the forging die made of the DIVAR is immersed into the solution consisting of the oxalic acid, the sulfuric acid and the deionized water, and nano-scale micropores are formed on the surface of the forging die.
Pretreating the forging die, cleaning the pretreated forging die, and drying the die;
inversely suspending and immersing the parting surfaces of the upper die and the lower die of the forging die into a prepared acid solution, wherein the immersion time is 15min, and the temperature of the acid solution is 65 ℃;
drying the forging die after soaking; wherein the drying temperature is 75 ℃, and the drying time is 25 min.
After drying, the surface of the forging die is provided with micropores with the diameter size of 20nm-400nm and the depth of 20nm-400nm, and the surface of the micropores is coated with a lubricant.
The inventor finds that: the inventor finds that when DIVAR is subjected to surface treatment by adopting the solution formula, micropores which are uniformly distributed and have consistent structures can be formed on the surface of the DIVAR, the diameter sizes of the micropores are all within the range of 20nm-400nm, and the depths of the micropores are all within the range of 20nm-400 nm; the corroded surface is coated with the lubricant, so that the lubricant can be preserved on the surface for a long time, and the lubricating property of the surface is improved.
For example, the forged parts of this example were treated in the following manner:
the forging piece is made of TA2, the formula of the TA2 stainless steel solution is 50g/L sulfuric acid, 20g/L hydrofluoric acid and the other components are deionized water; by immersing a forging of TA2 material in a solution of phosphoric acid, hydrofluoric acid and deionized water, nano-scale micro-pores are formed on the surface of the forging.
Pretreating the forging part, cleaning and drying the pretreated forging part;
immersing the forging piece into a prepared acid solution, wherein the temperature of the acid solution is 40 ℃, and the immersion time is 20 min;
drying the forged piece after soaking; wherein the drying temperature is 85 ℃, and the drying time is 15 min;
after drying, the surface of the forging part is provided with nano-scale micropores with the diameter size of 20nm-400nm and the depth of 20nm-400 nm.
The inventor finds that: the forging piece is made of a material suitable for hot forging processing, the surface treatment method is adopted to simultaneously carry out surface treatment on the surface of the forging die and the surface of the forging piece, the service life of the forging die is prolonged by 20%, the processing efficiency is improved by 10%, and the appearance of a forging product formed by forging the forging piece is improved to a great extent.
According to the embodiment 1 and the embodiment 2, the method for surface treatment of the metal piece used in the forging process is applicable to forging processing in any process manner, so the method for surface treatment of the metal piece used in the forging process is wide in application range.
Example 3:
in this example, only the surface of the forging die was subjected to surface treatment.
For example, in this example, the forging die is processed in the following manner:
the forging die is made of DC53, the formula of the acid solution of the DC53 is 30g/L oxalic acid and 60g/L sulfuric acid, the other components are deionized water, the forging die made of the DC53 is immersed in the solution consisting of the oxalic acid, the sulfuric acid and the deionized water, and nano-scale micropores are formed on the surface of the forging die.
Pretreating the forging die, cleaning the pretreated forging die, and drying the die;
inversely suspending and immersing the parting surfaces of the upper die and the lower die of the forging die into a prepared acid solution, wherein the immersion time is 15min, and the temperature of the acid solution is 65 ℃;
drying the forging die after soaking; wherein the drying temperature is 80 ℃ and the drying time is 20 min.
After drying, the surface of the forging die is provided with micropores with the diameter size of 20nm-400nm and the depth of 20nm-400nm, and the surface of the micropores is coated with a lubricant.
The inventor finds that: the forging piece is made of a material which is suitable for cold forging, hot forging or warm forging, when only the surface of the forging die is subjected to surface treatment, the abrasion between the die and the forging piece can be reduced, and the service life of the die is prolonged; meanwhile, the attractiveness of the forged product can be improved to a certain extent. The surface treatment method only performs surface treatment on the surface of the forging die, so that the service life of the forging die is prolonged by 15%, the processing efficiency is improved by 10%, and the appearance effect of a forged product formed by forging a forged piece is better improved.
Example 4:
the present example surface-treated both the surfaces of the forging die and the forging to improve the life of the forging die and reduce wear between the forging die and the forging.
For example, in this example, the forging die is processed in the following manner:
the forging die is made of carbon tool steel, the formula of an acid solution of the carbon tool steel is 30g/L of nitric acid and 100g/L of hydrofluoric acid, and the other components are deionized water, the forging die made of the carbon tool steel is immersed in the solution consisting of the nitric acid, the hydrofluoric acid and the deionized water, and micro-nano-scale micropores are formed on the surface of the forging die.
Pretreating the forging die, cleaning the pretreated forging die, and drying the die;
inversely suspending and immersing the parting surfaces of the upper die and the lower die of the forging die into a prepared acid solution, wherein the immersion time is 15min, and the temperature of the acid solution is 50 ℃; the soaking time can be adjusted according to the temperature of the solution, for example, when the temperature of the solution is low, the soaking time can be prolonged, so that the surface of the forging die can form a better micropore structure, and the lubricating property of the surface is improved.
Drying the forging die after soaking; wherein the drying temperature is 75 ℃, and the drying time is 25 min.
And (3) obtaining micropores with the diameter size of 100nm-20 mu m and the depth of 100nm-20 mu m on the surface of the forging die after drying, and smearing a lubricant on the surface of the micropores.
For example, the forged parts of this example were treated in the following manner:
the material of the forged piece is No. 45 steel, the formula of the No. 45 steel solution is 50g/L of hydrochloric acid, 300g/L of boric acid, and the other components are deionized water; a forged piece made of 45 # steel is immersed in a solution consisting of hydrochloric acid, boric acid and deionized water, and micro-nano-scale micropores are formed on the surface of the forged piece.
Pretreating the forging part, cleaning and drying the pretreated forging part;
immersing the forging piece into a prepared acid solution, wherein the temperature of the acid solution is 80 ℃, and the immersion time is 8 min;
the third step: drying the forged piece after soaking; wherein the drying temperature is 80 ℃, and the drying time is 20 min;
after the drying is finished, micro-nano-scale micropores with the diameter size of 100nm-20 mu m and the depth of 100nm-20 mu m are obtained on the surface of the forging piece.
The inventor finds that: by adopting the surface treatment method provided by the invention to simultaneously carry out surface treatment on the surface of the forging die and the surface of the forging piece, the service life of the forging die is prolonged by 25%, the processing efficiency is improved by 15%, and the appearance of a forging product formed by forging the forging piece is improved to a great extent.
Example 5:
the present example surface-treated both the surfaces of the forging die and the forging to improve the life of the forging die and reduce wear between the forging die and the forging.
For example, in this example, the forging die is processed in the following manner:
the material of the forging die is GR, the formula of the solution for GR is 50g/L sulfuric acid, 100g/L gallic acid and the other components are deionized water, the forging die with the material GR is immersed in the solution consisting of sulfuric acid, gallic acid and deionized water, and nano-scale micropores can be formed on the surface of the forging die.
Pretreating the forging die, cleaning the pretreated forging die, and drying the die;
inversely suspending and immersing the parting surfaces of the upper die and the lower die of the forging die into a prepared acid solution, wherein the immersion time is 15min, and the temperature of the acid solution is 55 ℃;
drying the forging die after soaking; wherein the drying temperature is 80 ℃ and the drying time is 20 min.
And (3) after drying, obtaining micropores with the diameter size of 100nm-800nm and the depth of 100nm-800nm on the surface of the forging die, and smearing a lubricant on the surface of the micropores.
For example, the forged parts of this example were treated in the following manner:
the forging piece is made of cast iron, the formula of an acid solution for the cast iron is 300g/L sulfuric acid, and the other components are deionized water; the forging piece made of cast iron is immersed in a solution composed of sulfuric acid and deionized water, and nano-scale micropores are formed on the surface of the forging piece.
Pretreating the forging part, cleaning and drying the pretreated forging part;
immersing the forging piece into a prepared acid solution, wherein the temperature of the acid solution is 40 ℃, and the immersion time is 20 min;
drying the forged piece after soaking; wherein the drying temperature is 85 ℃, and the drying time is 15 min;
after drying, the surface of the forging part obtains nano-scale micropores with the diameter size of 100nm-500nm and the depth of 100nm-500 nm.
The inventor finds that: by adopting the surface treatment method provided by the invention to simultaneously carry out surface treatment on the surface of the forging die and the surface of the forging piece, the service life of the forging die is prolonged by 25%, the processing efficiency is improved by 15%, and the appearance of a forging product formed by forging the forging piece is improved to a great extent.
Example 6:
the present example surface-treated both the surfaces of the forging die and the forging to improve the life of the forging die and reduce wear between the forging die and the forging.
For example, in this example, the forging die is processed in the following manner:
the forging die is made of high-speed steel, the formula of the acid solution of the high-speed steel is 500g/L sulfuric acid, the other components are deionized water, the forging die made of the high-speed steel is immersed in the solution formed by the sulfuric acid and the deionized water, and nano-scale micropores are formed on the surface of the forging die.
Pretreating the forging die, cleaning the pretreated forging die, and drying the die;
inversely suspending and immersing the parting surfaces of the upper die and the lower die of the forging die into a prepared acid solution, wherein the immersion time is 10min, and the temperature of the acid solution is 60 ℃;
drying the forging die after soaking; wherein the drying temperature is 80 ℃ and the drying time is 20 min.
After drying, the surface of the forging die is provided with micropores with the diameter size of 20nm-400nm and the depth of 20nm-400nm, and the surface of the micropores is coated with a lubricant.
For example, the forged parts of this example were treated in the following manner:
the forging piece is made of 316L stainless steel, the formula of a 316L stainless steel solution is 300g/L phosphoric acid, and the other components are deionized water; a forging piece made of 316L stainless steel is immersed in a solution consisting of phosphoric acid and deionized water, and nano-scale micropores are formed on the surface of the forging piece.
Pretreating the forging part, cleaning and drying the pretreated forging part;
immersing the forged piece into a prepared acid solution, wherein the temperature of the acid solution is 60 ℃, and the immersion time is 15 min;
drying the forged piece after soaking; wherein the drying temperature is 80 ℃, and the drying time is 20 min;
after drying, the surface of the forging part is provided with nano-scale micropores with the diameter size of 20nm-400nm and the depth of 20nm-400 nm.
The inventor finds that: by adopting the surface treatment method provided by the invention to simultaneously carry out surface treatment on the surface of the forging die and the surface of the forging piece, the service life of the forging die is prolonged by 25%, the processing efficiency is improved by 15%, and the appearance of a forging product formed by forging the forging piece is improved to a great extent.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (9)
1. A method of surface treating a metal article for use in a forging process, the method comprising the steps of:
corroding the surface of the metal piece by using an acid solution to form micropores on the surface of the metal piece;
drying the surface of the corroded metal piece;
and coating a lubricant on the surface of the metal piece with the micropores, wherein the lubricant is adsorbed in the micropores, and a layer of lubricating film is formed on the surface of the metal piece.
2. The method of surface treating a metal part for use in a forging process of claim 1, further comprising, prior to subjecting the surface of the metal part to a corrosion treatment:
pretreating the surface of the metal piece;
and cleaning and drying the surface of the pretreated metal piece.
3. The method of surface treating a metal part for use in a forging process of claim 1, wherein the surface etching treatment of the metal part with the acid solution comprises: and soaking the surface of the metal piece in the acid solution to form the micropores with the diameter size of 20nm-40 mu m and the depth of 20nm-40 mu m on the surface of the metal piece.
4. A method of surface treating a metal part for use in a forging process according to claim 1 or 3, wherein the acid solution comprises one or more of oxalic acid, sulphuric acid, hydrochloric acid, phosphoric acid, nitric acid, boric acid, formic acid, hydrofluoric acid, gallic acid.
5. The method for surface treating a metal piece for use in a forging process of claim 2, wherein the drying temperature range of the drying process is: 75-85 ℃; the drying time is 15 min-25 min.
6. A method of surface treating a metal part for use in a forging process as recited in claim 3, wherein the acid solution has a temperature in the range of: 40-80 ℃; the soaking time ranges are as follows: 1min-20 min.
7. The method of surface treating a metal part for use in a forging process of claim 4, wherein the acid solution comprises: oxalic acid 20g/L and sulfuric acid 50 g/L.
8. The method of surface treating a metal part for use in a forging process of claim 4, wherein the acid solution comprises: oxalic acid 30g/L and phosphoric acid 200 g/L.
9. The method of surface treating a metal part for use in a forging process of claim 4, wherein the acid solution comprises: 50g/L of sulfuric acid and 20g/L of hydrofluoric acid.
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