CN110656214A - Preparation method of cast iron workpiece for clothes support - Google Patents
Preparation method of cast iron workpiece for clothes support Download PDFInfo
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- CN110656214A CN110656214A CN201910929574.XA CN201910929574A CN110656214A CN 110656214 A CN110656214 A CN 110656214A CN 201910929574 A CN201910929574 A CN 201910929574A CN 110656214 A CN110656214 A CN 110656214A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/08—Manufacture of cast-iron
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a preparation method of a cast iron workpiece for a clothes support, belonging to the technical field of cast iron castings and comprising the following steps: (1) preparing modified filler; (2) pretreating pig iron; (3) pretreating scrap steel; (4) and (5) preparing a finished product. The cast iron workpiece prepared by the method has obviously improved tensile resistance, impact toughness and rust resistance, and can effectively improve the service quality of the clothes support and prolong the service life of the clothes support when being used for manufacturing the clothes support.
Description
Technical Field
The invention belongs to the technical field of cast iron castings, and particularly relates to a preparation method of a cast iron workpiece for a clothes support.
Background
The clothes support is a necessary living article for people to live, and although the plastic clothes support has a stainless performance, the clothes support is very easy to oxidize and pulverize and even break due to long-term exposure to the sun, so that the service life is very short. Nowadays, more and more people start to use metal clothes supports, iron clothes supports are widely used, however, the iron clothes supports are easy to rust during use, and are easy to break or bend during use, especially when being used for large clothes, and the research reports on the improvement of iron are few and the improvement effect is not significant, for example, application No. 201110051317.4 discloses a method for modifying the surface of a metal die casting by using a polymer coating method, which comprises the following steps: providing a metal die casting base material surface; coating a high molecular polymer on the surface of the metal die casting base material; depositing a metal film on the high molecular polymer in a vacuum coating mode; and a transparent protective layer is coated on the metal film to finish the surface modification of the metal die casting, so that the texture and the metal color of the surface of the metal die casting are improved, although the surface performance of the metal die casting is improved, the film is likely to crack and fall off in the use process, in addition, the surface performance of the casting is only improved in the mode, and the modification effect is greatly weakened or even disappears when the metal die casting is further processed.
Disclosure of Invention
The invention aims to provide a preparation method of a cast iron workpiece for a clothes support, aiming at the existing problems.
The invention is realized by the following technical scheme:
a preparation method of a cast iron workpiece for a clothes hanger comprises the following steps:
(1) preparing the modified filler:
a. putting the hollow glass beads into DBD cold plasma treatment equipment, carrying out cold plasma treatment, treating for 35 ~ 45min, and taking out for later use;
b. immersing the hollow glass beads subjected to cold plasma treatment in the operation a into a modifier, continuously stirring while immersing, stirring at the rotating speed of 120 ~ 140rpm for 30 ~ 40min, and filtering and drying;
(2) pre-treating pig iron:
a. putting pig iron into a microwave environment for microwave treatment for 5 ~ 9min, polishing the surface with abrasive paper, and removing debris for later use;
b. placing the pig iron treated in the operation a on a GJ-1.5 type high-frequency high-voltage high-power electron accelerator for electron beam irradiation treatment, and taking out for later use after the irradiation treatment is carried out for 24 ~ 28 min;
(3) pretreatment of scrap steel:
a. immersing the scrap steel into an oil stain cleaning agent, then placing the scrap steel into an ultrasonic environment for ultrasonic cleaning, taking out the scrap steel after cleaning for 1 ~ 2 hours, washing the scrap steel with sterile water, and drying the scrap steel for later use;
b. placing the steel scrap cleaned and dried in the operation a on a GJ-1.5 type high-frequency high-voltage high-power electron accelerator for electron beam irradiation treatment, and taking out for later use after the irradiation treatment is carried out for 16 ~ 18 min;
(4) and (3) preparing a finished product:
a. uniformly mixing the pig iron pretreated in the step (2) and the scrap steel pretreated in the step (3) according to the weight ratio of 10 ~ 14:1 ~ 2, putting the mixture into a stirring tank, adding the modified filler obtained in the step (1) at a constant speed while stirring, and taking out the mixture for later use after stirring for 1 ~ 2 h;
b. and c, adding the mixture obtained in the operation a into a smelting furnace for smelting, carrying out vacuum degassing treatment after the mixture is completely smelted, and then discharging from the furnace for casting and forming.
Further, the power of cold plasma treatment in operation a of step (1) is 1800 ~ 2000W.
Further, in the operation b of the step (1), the modifier comprises 3 ~ 4% of white carbon black, 7 ~ 9% of sodium carbonate, 2 ~ 3% of fulvic acid, 0.6 ~ 0.7.7% of ethylenediamine, 2 ~ 3% of absolute ethyl alcohol and the balance of deionized water according to the corresponding weight percentage.
Further, the power of the microwave during the microwave treatment in the operation a of the step (2) is 500 ~ 700W.
Further, the dosage of the electron beam irradiation treatment in the operation b of the step (2) is 2.1 ~ 2.5 × 105rad/s。
Further, the frequency of the ultrasonic wave in operation a of step (3) is 50 ~ 60 kHz.
Further, the dosage of the electron beam irradiation treatment in the operation b of the step (3) is 2.4 ~ 2.5 × 104rad/s。
Further, the rotation speed during stirring in the operation a of the step (4) is 100 ~ 140 rpm.
Further, the adding speed of the modified filler in the operation a of the step (4) is 1 ~ 2mg/s, and the adding amount of the modified filler is 2.3 ~ 3.3.3% of the adding amount of the pig iron in the operation a of the step (4).
Further, the adding speed of the modified filler in the operation a of the step (4) is 1 ~ 2mg/s, and the adding amount of the modified filler is that the temperature in the melting furnace when the modified filler is melted in the operation b of the step (4) is controlled to be 1500 ~ 1540 ℃.
The invention mainly aims at the use characteristics of the cast iron workpiece for the clothes support and the problems of the prior iron clothes support, researches and develops the preparation method of the cast iron workpiece for the clothes support. In the preparation of a cast iron workpiece, a specially-made modified filler is added, hollow glass beads are used as a matrix, DBD cold plasma treatment is firstly carried out, silicon hydroxyl with low surface activity of the hollow glass beads is promoted to become an active center, further, a monomer is initiated to polymerize on the surfaces of the beads, then, the monomer is added into a modifier, under the auxiliary action of active ingredients of the modifier, white carbon black in the modifier is effectively combined to the hollow glass beads, the performance of the hollow glass beads is enhanced and improved, the performance of a pig iron casting is further improved, meanwhile, the adhesiveness of the hollow glass beads in the matrix of the cast iron workpiece is enhanced, and the antirust performance of the pig iron casting can be enhanced; the method comprises the steps of pretreating pig iron and scrap steel before preparing a finished product, activating and falling off scraps on the surface of the pig iron in a microwave environment, polishing and washing to remove surface scraps, forming micro-etching on the surface of the pig iron through the irradiation of an electron beam, cleaning the scrap steel by using an oil stain cleaning agent, removing stains on the surface of the scrap steel under the auxiliary action of ultrasonic waves, and forming the micro-etching on the surface of the scrap steel through the irradiation of the electron beam. Then the pretreated pig iron and the waste steel are mixed evenly and put into a stirring tank, modified fillers are added slowly while stirring to change the constant speed, the modified fillers are promoted to be evenly distributed on the surfaces of the pig iron and the waste steel, then melting, vacuum degassing and tapping and casting molding are carried out, thus obtaining the product
Compared with the prior art, the invention has the following advantages:
the invention provides a preparation method of a cast iron workpiece for a clothes support, which improves the tensile property, impact toughness and rust resistance of a cast iron casting, further improves and enhances the service performance of the iron clothes support, improves the quality of the clothes support and prolongs the service life of the clothes support.
Detailed Description
Example 1
A preparation method of a cast iron workpiece for a clothes hanger comprises the following steps:
(1) preparing the modified filler:
a. putting the hollow glass beads into DBD cold plasma treatment equipment, carrying out cold plasma treatment, and taking out for later use after 35min of treatment;
b. b, immersing the hollow glass beads subjected to cold plasma treatment in the operation a into a modifier, continuously stirring while immersing, stirring at the rotating speed of 120rpm for 30min, filtering and drying;
(2) pre-treating pig iron:
a. putting pig iron into a microwave environment for microwave treatment for 5min, polishing the surface by using abrasive paper, and removing scraps for later use after polishing treatment;
b. placing the pig iron treated in the operation a on a GJ-1.5 type high-frequency high-voltage high-power electron accelerator for electron beam irradiation treatment, and taking out for later use after the irradiation treatment is carried out for 24 min;
(3) pretreatment of scrap steel:
a. immersing the scrap steel into an oil stain cleaning agent, then placing the scrap steel in an ultrasonic environment for ultrasonic cleaning, taking out the scrap steel after cleaning for 1h, washing the scrap steel with sterile water, and drying the scrap steel for later use;
b. placing the steel scrap cleaned and dried in the operation a on a GJ-1.5 type high-frequency high-voltage high-power electron accelerator for electron beam irradiation treatment, and taking out for later use after the irradiation treatment is carried out for 16 min;
(4) and (3) preparing a finished product:
a. uniformly mixing the pig iron pretreated in the step (2) and the scrap steel pretreated in the step (3) according to the weight ratio of 10:1, putting the mixture into a stirring tank, adding the modified filler obtained in the step (1) at a constant speed while stirring, stirring for 1h, and taking out the mixture for later use;
b. and c, adding the mixture obtained in the operation a into a smelting furnace for smelting, carrying out vacuum degassing treatment after the mixture is completely smelted, and then discharging from the furnace for casting and forming.
Further, the power of cold plasma treatment in operation a of step (1) is 1800W.
Further, in the operation b of the step (1), the modifier comprises the following components in percentage by weight: 3% of white carbon black, 7% of sodium carbonate, 2% of fulvic acid, 0.6% of ethylenediamine, 2% of absolute ethyl alcohol and the balance of deionized water.
Further, the power of the microwave during the microwave treatment in the operation a of step (2) is 500W.
Further, the dose of the electron beam irradiation treatment in the operation b of the step (2) is 2.1 × 105rad/s。
Further, the frequency of the ultrasonic wave in operation a of step (3) is 50 kHz.
Further, the dose of the electron beam irradiation treatment in the operation b of the step (3) is 2.4 × 104rad/s。
Further, the rotation speed of the stirring in the operation a of the step (4) is 100 rpm.
Further, the adding speed of the modified filler in the operation a of the step (4) is 1mg/s, and the adding amount of the modified filler is 2.3% of the adding amount of the pig iron in the operation a of the step (4).
Further, the adding speed of the modified filler in the operation a of the step (4) is 1mg/s, and the adding amount of the modified filler is that the temperature in the melting furnace is controlled to be 1500 ℃ when the modified filler is melted in the operation b of the step (4).
Example 2
A preparation method of a cast iron workpiece for a clothes hanger comprises the following steps:
(1) preparing the modified filler:
a. putting the hollow glass beads into DBD cold plasma treatment equipment, carrying out cold plasma treatment, and taking out for later use after 40min of treatment;
b. immersing the hollow glass beads subjected to cold plasma treatment in the operation a into a modifier, continuously stirring while immersing, stirring at the rotating speed of 130rpm for 35min, filtering and drying;
(2) pre-treating pig iron:
a. putting pig iron into a microwave environment for microwave treatment for 7min, polishing the surface by using abrasive paper, and removing scraps for later use after polishing treatment;
b. placing the pig iron treated in the operation a on a GJ-1.5 type high-frequency high-voltage high-power electron accelerator for electron beam irradiation treatment, and taking out for later use after the irradiation treatment is carried out for 26 min;
(3) pretreatment of scrap steel:
a. immersing the scrap steel into an oil stain cleaning agent, then placing the scrap steel in an ultrasonic environment for ultrasonic cleaning, taking out the scrap steel after 1.5h of cleaning, washing the scrap steel with sterile water, and drying the scrap steel for later use;
b. placing the steel scrap cleaned and dried in the operation a on a GJ-1.5 type high-frequency high-voltage high-power electron accelerator for electron beam irradiation treatment, and taking out for later use after the irradiation treatment is carried out for 17 min;
(4) and (3) preparing a finished product:
a. uniformly mixing the pig iron pretreated in the step (2) and the scrap steel pretreated in the step (3) according to the weight ratio of 12:1.5, putting the mixture into a stirring tank, adding the modified filler obtained in the step (1) at a constant speed while stirring, stirring for 1.5 hours, and taking out the mixture for later use;
b. and c, adding the mixture obtained in the operation a into a smelting furnace for smelting, carrying out vacuum degassing treatment after the mixture is completely smelted, and then discharging from the furnace for casting and forming.
Further, the power of the cold plasma treatment in the operation a of the step (1) is 1900W.
Further, in the operation b of the step (1), the modifier comprises the following components in percentage by weight: 3.5% of white carbon black, 8% of sodium carbonate, 2.5% of fulvic acid, 0.65% of ethylenediamine, 2.5% of absolute ethyl alcohol and the balance of deionized water.
Further, the power of the microwave during the microwave treatment in the operation a of step (2) is 600W.
Further, the dose of the electron beam irradiation treatment in the operation b of the step (2) is 2.3 × 105rad/s。
Further, the frequency of the ultrasonic wave in operation a of step (3) is 55 kHz.
Further, the dose of the electron beam irradiation treatment in the operation b of the step (3) is 2.45 × 104rad/s。
Further, the rotation speed during stirring in the operation a of the step (4) is 120 rpm.
Further, the adding speed of the modified filler in the operation a of the step (4) is 1.5mg/s, and the adding amount of the modified filler is 2.8 percent of the adding amount of the pig iron in the operation a of the step (4).
Further, the adding speed of the modified filler in the operation a of the step (4) is 1.5mg/s, and the adding amount of the modified filler is that the temperature in the melting furnace is controlled to be 1520 ℃ when the modified filler is melted in the operation b of the step (4).
Example 3
A preparation method of a cast iron workpiece for a clothes hanger comprises the following steps:
(1) preparing the modified filler:
a. putting the hollow glass beads into DBD cold plasma treatment equipment, carrying out cold plasma treatment, treating for 45min, and taking out for later use;
b. immersing the hollow glass beads subjected to cold plasma treatment in the operation a into a modifier, continuously stirring while immersing, stirring at the rotating speed of 140rpm for 40min, filtering and drying;
(2) pre-treating pig iron:
a. putting pig iron into a microwave environment for microwave treatment for 9min, polishing the surface by using abrasive paper, and removing scraps for later use after polishing treatment;
b. placing the pig iron treated in the operation a on a GJ-1.5 type high-frequency high-voltage high-power electron accelerator for electron beam irradiation treatment, and taking out for later use after the irradiation treatment is carried out for 28 min;
(3) pretreatment of scrap steel:
a. immersing the scrap steel into an oil stain cleaning agent, then placing the scrap steel in an ultrasonic environment for ultrasonic cleaning, taking out the scrap steel after 2 hours of cleaning, washing the scrap steel with sterile water, and drying the scrap steel for later use;
b. placing the steel scrap cleaned and dried in the operation a on a GJ-1.5 type high-frequency high-voltage high-power electron accelerator for electron beam irradiation treatment, and taking out for later use after the irradiation treatment is carried out for 18 min;
(4) and (3) preparing a finished product:
a. uniformly mixing the pig iron pretreated in the step (2) and the scrap steel pretreated in the step (3) according to the weight ratio of 14: 2, putting the mixture into a stirring tank, adding the modified filler obtained in the step (1) at a constant speed while stirring, and taking out the mixture for later use after stirring treatment for 2 hours;
b. and c, adding the mixture obtained in the operation a into a smelting furnace for smelting, carrying out vacuum degassing treatment after the mixture is completely smelted, and then discharging from the furnace for casting and forming.
Further, the power of the cold plasma treatment in the operation a of the step (1) is 2000W.
Further, in the operation b of the step (1), the modifier comprises the following components in percentage by weight: 4% of white carbon black, 9% of sodium carbonate, 3% of fulvic acid, 0.7% of ethylenediamine, 3% of absolute ethyl alcohol and the balance of deionized water.
Further, the power of the microwave during the microwave treatment in the operation a of step (2) is 700W.
Further, the dose of the electron beam irradiation treatment in the operation b of the step (2) is 2.5 × 105rad/s。
Further, the frequency of the ultrasonic wave in operation a of step (3) is 60 kHz.
Further, the dose of the electron beam irradiation treatment in the operation b of the step (3) is 2.5 × 104rad/s。
Further, the rotation speed during stirring in the operation a of the step (4) is 140 rpm.
Further, the adding speed of the modified filler in the operation a of the step (4) is 2mg/s, and the adding amount of the modified filler is 3.3% of the adding amount of the pig iron in the operation a of the step (4).
Further, the adding speed of the modified filler in the operation a of the step (4) is 2mg/s, and the adding amount of the modified filler is that the temperature in the melting furnace when the modified filler is melted in the operation b of the step (4) is controlled to be 1540 ℃.
Comparative example 1
A preparation method of a cast iron workpiece for a clothes hanger comprises the following steps:
(1) pre-treating pig iron:
a. putting pig iron into a microwave environment for microwave treatment for 7min, polishing the surface by using abrasive paper, and removing scraps for later use after polishing treatment;
b. placing the pig iron treated in the operation a on a GJ-1.5 type high-frequency high-voltage high-power electron accelerator for electron beam irradiation treatment, and taking out for later use after the irradiation treatment is carried out for 26 min;
(2) pretreatment of scrap steel:
a. immersing the scrap steel into an oil stain cleaning agent, then placing the scrap steel in an ultrasonic environment for ultrasonic cleaning, taking out the scrap steel after 1.5h of cleaning, washing the scrap steel with sterile water, and drying the scrap steel for later use;
b. placing the steel scrap cleaned and dried in the operation a on a GJ-1.5 type high-frequency high-voltage high-power electron accelerator for electron beam irradiation treatment, and taking out for later use after the irradiation treatment is carried out for 17 min;
(3) and (3) preparing a finished product:
a. uniformly mixing the pig iron pretreated in the step (2) and the scrap steel pretreated in the step (3) according to the weight ratio of 12:1.5, putting the mixture into a stirring tank, adding hollow glass beads at a constant speed while stirring, stirring for 1.5 hours, and taking out the mixture for later use;
b. and c, adding the mixture obtained in the operation a into a smelting furnace for smelting, carrying out vacuum degassing treatment after the mixture is completely smelted, and then discharging from the furnace for casting and forming.
The technical parameters of all the operating steps in this comparative example 1 are the same as in example 2.
Comparative example 2
A preparation method of a cast iron workpiece for a clothes hanger comprises the following steps:
(1) pre-treating pig iron:
a. putting pig iron into a microwave environment for microwave treatment for 7min, polishing the surface by using abrasive paper, and removing scraps for later use after polishing treatment;
b. placing the pig iron treated in the operation a on a GJ-1.5 type high-frequency high-voltage high-power electron accelerator for electron beam irradiation treatment, and taking out for later use after the irradiation treatment is carried out for 26 min;
(2) pretreatment of scrap steel:
a. immersing the scrap steel into an oil stain cleaning agent, then placing the scrap steel in an ultrasonic environment for ultrasonic cleaning, taking out the scrap steel after 1.5h of cleaning, washing the scrap steel with sterile water, and drying the scrap steel for later use;
b. placing the steel scrap cleaned and dried in the operation a on a GJ-1.5 type high-frequency high-voltage high-power electron accelerator for electron beam irradiation treatment, and taking out for later use after the irradiation treatment is carried out for 17 min;
(3) and (3) preparing a finished product:
a. uniformly mixing the pig iron pretreated in the step (2) and the scrap steel pretreated in the step (3) according to the weight ratio of 12:1.5 to obtain a mixture for later use;
b. and c, adding the mixture obtained in the operation a into a smelting furnace for smelting, carrying out vacuum degassing treatment after the mixture is completely smelted, and then discharging from the furnace for casting and forming.
The technical parameters of all the operating steps in this comparative example 2 are the same as in example 2.
Comparative example 3
A preparation method of a cast iron workpiece for a clothes hanger comprises the following steps:
(1) preparing the modified filler:
a. putting the hollow glass beads into DBD cold plasma treatment equipment, carrying out cold plasma treatment, and taking out for later use after 40min of treatment;
b. immersing the hollow glass beads subjected to cold plasma treatment in the operation a into a modifier, continuously stirring while immersing, stirring at the rotating speed of 130rpm for 35min, filtering and drying;
(2) pretreatment of scrap steel:
a. immersing the scrap steel into an oil stain cleaning agent, then placing the scrap steel in an ultrasonic environment for ultrasonic cleaning, taking out the scrap steel after 1.5h of cleaning, washing the scrap steel with sterile water, and drying the scrap steel for later use;
b. placing the steel scrap cleaned and dried in the operation a on a GJ-1.5 type high-frequency high-voltage high-power electron accelerator for electron beam irradiation treatment, and taking out for later use after the irradiation treatment is carried out for 17 min;
(3) and (3) preparing a finished product:
a. uniformly mixing pig iron and the waste steel pretreated in the step (2) according to the weight ratio of 12:1.5, adding the mixture into a stirring tank, adding the modified filler obtained in the step (1) at a constant speed while stirring, stirring for 1.5h, and taking out the mixture for later use;
b. and c, adding the mixture obtained in the operation a into a smelting furnace for smelting, carrying out vacuum degassing treatment after the mixture is completely smelted, and then discharging from the furnace for casting and forming.
The technical parameters of all the operating steps in this comparative example 3 are the same as in example 2.
Comparative example 4
A preparation method of a cast iron workpiece for a clothes hanger comprises the following steps:
(1) preparing the modified filler:
a. putting the hollow glass beads into DBD cold plasma treatment equipment, carrying out cold plasma treatment, and taking out for later use after 40min of treatment;
b. immersing the hollow glass beads subjected to cold plasma treatment in the operation a into a modifier, continuously stirring while immersing, stirring at the rotating speed of 130rpm for 35min, filtering and drying;
(2) pre-treating pig iron:
a. putting pig iron into a microwave environment for microwave treatment for 7min, polishing the surface by using abrasive paper, and removing scraps for later use after polishing treatment;
b. placing the pig iron treated in the operation a on a GJ-1.5 type high-frequency high-voltage high-power electron accelerator for electron beam irradiation treatment, and taking out for later use after the irradiation treatment is carried out for 26 min;
(3) and (3) preparing a finished product:
a. uniformly mixing the pig iron and the scrap steel pretreated in the step (2) according to the weight ratio of 12:1.5, putting the mixture into a stirring tank, adding the modified filler obtained in the step (1) at a constant speed while stirring, stirring for 1.5h, and taking out the mixture for later use;
b. and c, adding the mixture obtained in the operation a into a smelting furnace for smelting, carrying out vacuum degassing treatment after the mixture is completely smelted, and then discharging from the furnace for casting and forming.
The technical parameters of all the operating steps in this comparative example 4 are the same as in example 2.
Comparative example 5
A preparation method of a cast iron workpiece for a clothes hanger comprises the following steps:
(1) preparing the modified filler:
a. putting the hollow glass beads into DBD cold plasma treatment equipment, carrying out cold plasma treatment, and taking out for later use after 40min of treatment;
b. immersing the hollow glass beads subjected to cold plasma treatment in the operation a into a modifier, continuously stirring while immersing, stirring at the rotating speed of 130rpm for 35min, filtering and drying;
(2) and (3) preparing a finished product:
a. uniformly mixing pig iron and scrap steel according to the weight ratio of 12:1.5, putting into a stirring tank, adding the modified filler obtained in the step (1) at a constant speed while stirring, stirring for 1.5h, and taking out the mixture for later use;
b. and c, adding the mixture obtained in the operation a into a smelting furnace for smelting, carrying out vacuum degassing treatment after the mixture is completely smelted, and then discharging from the furnace for casting and forming.
The technical parameters of all the operating steps in this comparative example 5 are the same as in example 2.
Control group
The application numbers are: 201610510622.8 discloses a method for preparing pig iron castings.
In order to compare the effects of the present invention, cast iron workpieces were prepared by the methods of example 2, comparative example 1, comparative example 2, comparative example 3, comparative example 4 and comparative example 5, respectively, and cast iron castings were prepared by the method of the control group, and then tensile strength and elongation were measured by the methods specified in GB/T228-2002, respectively; the impact toughness is tested according to the method specified in GB/T229-2007, and the specific test and comparative data are shown in the following table 1:
TABLE 1
As can be seen from table 1 above, the cast iron workpiece prepared by the method of the present invention has significantly improved tensile strength, elongation and impact resistance compared to the cast iron casting in the control group, and when the cast iron workpiece is used for preparing a clothes support, the use quality and service life of the clothes support can be prolonged.
Claims (10)
1. A preparation method of a cast iron workpiece for a clothes hanger is characterized by comprising the following steps:
(1) preparing the modified filler:
a. putting the hollow glass beads into DBD cold plasma treatment equipment, carrying out cold plasma treatment, treating for 35 ~ 45min, and taking out for later use;
b. immersing the hollow glass beads subjected to cold plasma treatment in the operation a into a modifier, continuously stirring while immersing, stirring at the rotating speed of 120 ~ 140rpm for 30 ~ 40min, and filtering and drying;
(2) pre-treating pig iron:
a. putting pig iron into a microwave environment for microwave treatment for 5 ~ 9min, polishing the surface with abrasive paper, and removing debris for later use;
b. placing the pig iron treated in the operation a on a GJ-1.5 type high-frequency high-voltage high-power electron accelerator for electron beam irradiation treatment, and taking out for later use after the irradiation treatment is carried out for 24 ~ 28 min;
(3) pretreatment of scrap steel:
a. immersing the scrap steel into an oil stain cleaning agent, then placing the scrap steel into an ultrasonic environment for ultrasonic cleaning, taking out the scrap steel after cleaning for 1 ~ 2 hours, washing the scrap steel with sterile water, and drying the scrap steel for later use;
b. placing the steel scrap cleaned and dried in the operation a on a GJ-1.5 type high-frequency high-voltage high-power electron accelerator for electron beam irradiation treatment, and taking out for later use after the irradiation treatment is carried out for 16 ~ 18 min;
(4) and (3) preparing a finished product:
a. uniformly mixing the pig iron pretreated in the step (2) and the scrap steel pretreated in the step (3) according to the weight ratio of 10 ~ 14:1 ~ 2, putting the mixture into a stirring tank, adding the modified filler obtained in the step (1) at a constant speed while stirring, and taking out the mixture for later use after stirring for 1 ~ 2 h;
b. and c, adding the mixture obtained in the operation a into a smelting furnace for smelting, carrying out vacuum degassing treatment after the mixture is completely smelted, and then discharging from the furnace for casting and forming.
2. The method for preparing a cast iron workpiece for a clothes hanger as claimed in claim 1, wherein the power of cold plasma treatment in operation a of step (1) is 1800 ~ 2000W.
3. The method for preparing a cast iron workpiece for a clothes hanger according to claim 1, wherein the modifier in the operation b of the step (1) comprises 3 ~ 4% white carbon black, 7 ~ 9% sodium carbonate, 2 ~ 3% fulvic acid, 0.6 ~ 0.7.7% ethylene diamine, 2 ~ 3% absolute ethyl alcohol and the balance of deionized water.
4. The method for preparing a cast iron workpiece for a clothes hanger according to claim 1, wherein the microwave in the microwave treatment in the operation a of the step (2) has a power of 500 ~ 700W.
5. The method for preparing a cast iron workpiece for a clothes support according to claim 1, wherein the dosage of the electron beam irradiation treatment in the operation b of the step (2) is 2.1 ~ 2.5 x 105rad/s。
6. The method for preparing a cast iron workpiece for a clothes hanger according to claim 1, wherein the frequency of the ultrasonic wave in the operation a of the step (3) is 50 ~ 60 kHz.
7. The method for preparing a cast iron workpiece for a clothes support according to claim 1, wherein the dosage of the electron beam irradiation treatment in the operation b of the step (3) is 2.4 ~ 2.5 x 104rad/s。
8. The method for preparing a cast iron workpiece for a clothes hanger according to claim 1, wherein the stirring speed in operation a of step (4) is 100 ~ 140 rpm.
9. The method for preparing a cast iron workpiece for a clothes hanger according to claim 1, wherein the adding speed of the modified filler in the operation a of the step (4) is 1 ~ 2mg/s, and the adding amount of the modified filler is 2.3 ~ 3.3.3% of the adding amount of the pig iron in the operation a of the step (4).
10. The method for preparing a cast iron workpiece for a clothes hanger according to claim 1, wherein the modified filler is added at a rate of 1 ~ 2mg/s in operation a of step (4), and the temperature in the furnace is controlled to be 1500 ~ 1540 ℃ when the modified filler is melted in operation b of step (4).
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| CN112342552A (en) * | 2020-10-28 | 2021-02-09 | 蚌埠飞宇轴承有限公司 | Surface treatment method for improving chemical corrosion resistance of bearing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112342552A (en) * | 2020-10-28 | 2021-02-09 | 蚌埠飞宇轴承有限公司 | Surface treatment method for improving chemical corrosion resistance of bearing |
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