CN115522117A - Novel joint bolt production process - Google Patents
Novel joint bolt production process Download PDFInfo
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- CN115522117A CN115522117A CN202211130354.9A CN202211130354A CN115522117A CN 115522117 A CN115522117 A CN 115522117A CN 202211130354 A CN202211130354 A CN 202211130354A CN 115522117 A CN115522117 A CN 115522117A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
- C21D5/00—Heat treatments of cast-iron
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to the technical field of joint bolt production, and discloses a novel joint bolt production process, which comprises the following raw materials in parts by weight: 70-85% of Fe, si:6.0% -13%, C:3.0% -7.0%, cu:3.0% -9.0%, AI:2.0% -6.0%, mg:0.3 to 1.8 percent of the total weight of the raw materials, placing the raw materials in a high-temperature smelting furnace for first high-temperature smelting, and taking the following raw materials in parts by weight: ni:0.2% -1.2%, cr:0.008% -0.02% of the raw material is added into the raw material smelted for the first time, the mixture is fully stirred and mixed, then secondary high-temperature smelting is carried out, the raw material smelted for the second time is carried out refining treatment and degassing, deslagging and homogenizing treatment, the treated material is injected into a die for casting and forming to obtain a blank with a fixed size, the blank after casting and forming is placed into water for quenching, the surface of the blank is cleaned by sand flow and is subjected to deoxidation operation to obtain a joint plug blank, and the joint plug blank is subjected to tempering treatment, turning and surface galvanization treatment. According to the invention, the later-obtained joint bolt has high overall hardness, high mass and durability.
Description
Technical Field
The invention relates to the technical field of joint bolt production, in particular to a novel joint bolt production process.
Background
The fastener is a general term for a type of mechanical parts used for fastening and connecting and having a wide range of applications, and is a general term for a type of mechanical parts used when two or more parts (or members) are fastened and connected as a whole. The fastener is widely used in the industries including energy, electronics, electrical appliances, machinery, chemical industry, metallurgy, molds, hydraulic pressure and the like, and various fasteners can be seen on various machines, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemical industry, instruments, supplies and the like, and are the most widely applied mechanical basic parts. The fastener is characterized by various varieties and specifications, different performance and purposes, extremely high standardization, serialization and universalization degrees, and higher requirements on the fastener product due to the development of the mechanical industry as a main basic part product in the mechanical industry;
the joint bolt belongs to one kind of fastener, and when the joint bolt was applied to high strength humid environment, the joint bolt that exposes in external environment can appear the tired condition of corrosion, and the joint bolt that receives the environmental impact great is poor in high strength humid environment intensity hardness corrosion resistance, and the whole life of joint bolt is short to be difficult to satisfy market demand.
Therefore, a novel joint bolt production process is provided.
Disclosure of Invention
The invention mainly solves the technical problems in the prior art and provides a novel joint bolt production process.
In order to achieve the purpose, the invention adopts the following technical scheme that the novel joint bolt production process comprises the following working steps:
the first step is as follows: the preparation method comprises the following steps of (1) smelting ingredients in parts by weight: 70-85% of Fe, si:6.0% -13%, C:3.0% -7.0%, cu:3.0% -9.0%, AI:2.0% -6.0%, mg:0.3 to 1.8 percent of the raw materials are put into a high-temperature smelting furnace for first high-temperature smelting, and the smelting temperature is 800 to 920 ℃;
the second step: performing secondary high-temperature smelting, and taking the following raw materials in parts by weight: ni:0.2% -1.2%, cr:0.008% -0.02%, adding the raw materials into the raw materials smelted for the first time, fully stirring and mixing, and then carrying out secondary high-temperature smelting;
the third step: refining, namely refining the raw materials subjected to secondary high-temperature smelting;
the fourth step: casting, namely degassing, deslagging and homogenizing the refined materials, and injecting the materials into a mold for casting and molding to obtain a blank with a fixed size;
the fifth step: quenching, namely putting the cast blank into water for quenching;
and a sixth step: sand blasting, namely cleaning the surface of the blank by using sand flow and carrying out deoxidation operation to obtain a joint bolt blank;
the seventh step: tempering, namely tempering the joint plug blank;
the eighth step: turning, namely finely turning the joint bolt blank after tempering and cooling so that the size of the joint bolt meets the standard;
the ninth step: and (3) performing surface galvanization, namely immersing the joint bolt into a zinc liquid melted at a high temperature of 480 ℃ for galvanization, and performing surface galvanization on the joint bolt to achieve an anti-corrosion effect, thereby finally obtaining the required joint bolt.
Preferably, the raw materials in the first step are in parts by weight: 70% of Fe, si:6.0%, C:3.0%, cu:3.0%, AI:2.0%, mg:0.3 percent.
Preferably, the raw materials in the first step are in parts by weight: 75% of Fe, and Si:8.0%, C:5.0%, cu:6.0%, AI:4.0%, mg:0.8 percent.
Preferably, the raw materials in the first step are in parts by weight: 85% of Fe, si:13%, C:7.0%, cu:9.0%, AI:6.0%, mg:1.8 percent.
Preferably, the high-temperature smelting temperature in the second step is 870-970 ℃.
Preferably, the refining time in the third step is 30min-50min, and the refining temperature is 700 ℃ -780 ℃.
Preferably, the quenching temperature in the fifth step is 30-50 ℃.
Preferably, the tempering time in the seventh step is 5h-8h, and the tempering temperature is 200 ℃ -280 ℃.
Advantageous effects
The invention provides a novel production process of a joint bolt. The method has the following beneficial effects:
(1) This new joint bolt production technology, through add Si in the raw materials, C, cu, ni, cr, the holistic hardness strength of joint bolt has been improved, carry out twice high-temperature melting to the raw materials that adds twice afterwards so that the raw materials intensive mixing is in order to ensure the later stage quality, carry out quenching tempering to the joint bolt in later stage simultaneously and handle in order to improve the holistic quality strength of joint bolt, carry out hot dip galvanizing to the joint bolt and handle in order to make joint bolt surface galvanization, in order to improve the anticorrosive effect of joint bolt in order to improve the durability of joint bolt, thereby the whole intensity quality that improves the joint bolt is in order to make the joint bolt durable more lastingly.
(2) This new joint bolt production technology carries out refining treatment through the raw materials to after the secondary high temperature melting, carries out twice high temperature melting so that raw materials intensive mixing to the raw materials that adds twice, carries out refining treatment to the raw materials after the high temperature melting afterwards, and impurity contained in the raw materials after through refining treatment reduces, and the holistic purity of raw materials improves to improve the whole quality of later stage gained joint bolt.
(3) This new joint bolt production technology carries out the degasification slagging-off homogenization treatment to the material through carrying out twice high-temperature melting at the raw materials after, carries out twice high-temperature melting so that the raw materials intensive mixing to the raw materials that adds twice, carries out refining treatment to the raw materials after high-temperature melting afterwards, carries out degasification slagging-off homogenization treatment to the material afterwards, and the material carries out air and impurity amount that contain in the degasification slagging-off homogenization treatment reducible material to improve the hardness of later stage gained joint bolt.
(4) This new joint bolt production technology, carry out surface deoxidation treatment through utilizing the sand flow to the blank after quenching, carry out twice high-temperature melting so that the raw materials intensive mixing to the raw materials that add twice, carry out refining treatment to the raw materials after high-temperature melting afterwards, carry out degasification slagging-off homogenization to the material afterwards, carry out quenching treatment to the blank after the casting shaping afterwards, the blank after the quenching carries out sand blasting treatment, carry out high-speed flowing friction on the blank surface through the sand flow, the oxide film on blank surface is ground away after the friction of sand flow, the oxide skin adheres to and can corrode joint bolt surface and shorten joint bolt's life on joint bolt surface, and high-speed sand flow gets rid of the oxide skin that joint bolt surface formed in order to improve joint bolt holistic corrosion resistance and increase joint bolt's life.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: a novel joint bolt production process comprises the following working steps:
the first step is as follows: the preparation method comprises the following steps of proportioning and smelting, wherein the raw materials in parts by weight are as follows: 70-85% of Fe, si:6.0% -13%, C:3.0% -7.0%, cu:3.0% -9.0%, AI:2.0% -6.0%, mg:0.3 to 1.8 percent, and placing the raw materials into a high-temperature smelting furnace for primary high-temperature smelting at the smelting temperature of 800 to 920 ℃;
the second step: performing secondary high-temperature smelting, and taking the following raw materials in parts by weight: ni:0.2% -1.2%, cr:0.008% -0.02%, adding the raw materials into the raw materials smelted for the first time, fully stirring and mixing, and then carrying out secondary high-temperature smelting at the smelting temperature of 870-970 ℃;
the third step: refining, namely refining the raw material subjected to secondary high-temperature smelting for 30-50 min at the refining temperature of 700-780 ℃;
the fourth step: casting, namely degassing, deslagging and homogenizing the refined materials, and injecting the materials into a mold for casting and molding after treatment to obtain a blank with a fixed size;
the fifth step: quenching, namely putting the cast blank into water for quenching, wherein the quenching temperature is 30-50 ℃;
and a sixth step: sand blasting, namely cleaning the surface of the blank by using sand flow and carrying out deoxidation operation to obtain a joint bolt blank;
the seventh step: tempering, wherein the blank of the plug of the joint is tempered for 5-8 h at 200-280 ℃;
eighth step: turning, namely finely turning the joint bolt blank after tempering and cooling so that the size of the joint bolt meets the standard;
the ninth step: and (3) performing surface galvanization, namely immersing the joint bolt into a zinc liquid melted at a high temperature of 480 ℃ for galvanization, and performing surface galvanization on the joint bolt to achieve an anti-corrosion effect, thereby finally obtaining the required joint bolt.
Example two: a novel joint bolt production process comprises the following working steps:
the first step is as follows: the preparation method comprises the following steps of proportioning and smelting, wherein the raw materials in parts by weight are as follows: 70% of Fe, and Si:6.0%, C:3.0%, cu:3.0%, AI:2.0%, mg:0.3 percent of the raw materials are put into a high-temperature smelting furnace for first high-temperature smelting, and the smelting temperature is 800-920 ℃;
the second step is that: performing secondary high-temperature smelting, and taking the following raw materials in parts by weight: ni:0.2%, cr:0.008 percent, adding the raw materials into the raw materials which are firstly smelted, fully stirring and mixing, and then carrying out secondary high-temperature smelting at the smelting temperature of 870-970 ℃;
the third step: refining, namely refining the raw materials subjected to secondary high-temperature smelting for 30-50 min at 700-780 ℃;
the fourth step: casting, namely degassing, deslagging and homogenizing the refined materials, and injecting the materials into a mold for casting and molding to obtain a blank with a fixed size;
the fifth step: quenching, namely putting the cast blank into water for quenching, wherein the quenching temperature is 30-50 ℃;
and a sixth step: sand blasting, namely cleaning the surface of the blank by using sand flow and carrying out deoxidation operation to obtain a joint bolt blank;
the seventh step: tempering, namely tempering the joint plug blank, wherein the tempering time is 5-8 h, and the tempering temperature is 200-280 ℃;
eighth step: turning, namely finely turning the joint bolt blank after tempering and cooling so that the size of the joint bolt meets the standard;
the ninth step: and (3) performing surface galvanization, namely immersing the joint bolt into a zinc liquid melted at a high temperature of 480 ℃ for galvanization, and performing surface galvanization on the joint bolt to achieve an anti-corrosion effect, thereby finally obtaining the required joint bolt.
Example three: a novel joint bolt production process comprises the following working steps: a novel joint bolt production process comprises the following steps:
the first step is as follows: the preparation method comprises the following steps of proportioning and smelting, wherein the raw materials in parts by weight are as follows: 75% of Fe, and Si:8.0%, C:5.0%, cu:6.0%, AI:4.0%, mg:0.8 percent, putting the raw materials into a high-temperature smelting furnace for first high-temperature smelting, wherein the smelting temperature is 800-920 ℃;
the second step is that: performing secondary high-temperature smelting, and taking the following raw materials in parts by weight: ni:0.6%, cr: 0.01 percent of the raw materials are added into the raw materials smelted for the first time, fully stirred and mixed, and then smelted for the second time at high temperature, wherein the smelting temperature is 870-970 ℃;
the third step: refining, namely refining the raw material subjected to secondary high-temperature smelting for 30-50 min at the refining temperature of 700-780 ℃;
the fourth step: casting, namely degassing, deslagging and homogenizing the refined materials, and injecting the materials into a mold for casting and molding to obtain a blank with a fixed size;
the fifth step: quenching, namely putting the cast blank into water for quenching, wherein the quenching temperature is 30-50 ℃;
and a sixth step: sand blasting, namely cleaning the surface of the blank by using sand flow and performing deoxidation operation to obtain a joint bolt blank;
the seventh step: tempering, namely tempering the joint plug blank, wherein the tempering time is 5-8 h, and the tempering temperature is 200-280 ℃;
eighth step: turning, namely finely turning the joint bolt blank after tempering and cooling so that the size of the joint bolt meets the standard;
the ninth step: and (3) performing surface galvanization, namely immersing the joint bolt into a zinc liquid melted at a high temperature of 480 ℃ for galvanization, and performing surface galvanization on the joint bolt to achieve an anti-corrosion effect, thereby finally obtaining the required joint bolt.
Example four: a novel joint bolt production process comprises the following working steps: a novel joint bolt production process comprises the following steps:
the first step is as follows: the preparation method comprises the following steps of proportioning and smelting, wherein the raw materials in parts by weight are as follows: 85% of Fe, si:13%, C:7.0%, cu:9.0%, AI:6.0%, mg:1.8 percent, putting the raw materials into a high-temperature smelting furnace for first high-temperature smelting, wherein the smelting temperature is 800-920 ℃;
the second step is that: performing secondary high-temperature smelting, and taking the following raw materials in parts by weight: ni:1.2%, cr: 0.02 percent, adding the raw materials into the raw materials which are smelted for the first time, fully stirring and mixing the raw materials, and then smelting for the second time at the high temperature of 870-970 ℃;
the third step: refining, namely refining the raw material subjected to secondary high-temperature smelting for 30-50 min at the refining temperature of 700-780 ℃;
the fourth step: casting, namely degassing, deslagging and homogenizing the refined materials, and injecting the materials into a mold for casting and molding after treatment to obtain a blank with a fixed size;
the fifth step: quenching, namely putting the cast blank into water for quenching, wherein the quenching temperature is 30-50 ℃;
and a sixth step: sand blasting, namely cleaning the surface of the blank by using sand flow and carrying out deoxidation operation to obtain a joint bolt blank;
the seventh step: tempering, namely tempering the joint plug blank, wherein the tempering time is 5-8 h, and the tempering temperature is 200-280 ℃;
eighth step: turning, namely finely turning the joint bolt blank after tempering and cooling so that the size of the joint bolt meets the standard;
the ninth step: and (3) performing surface galvanization, namely immersing the joint bolt into a zinc liquid melted at a high temperature of 480 ℃ for galvanization, and performing surface galvanization on the joint bolt to achieve an anti-corrosion effect, thereby finally obtaining the required joint bolt.
The working principle of the invention is as follows: taking the following raw materials in parts by weight: 70-85% of Fe, si:6.0% -13%, C:3.0% -7.0%, cu:3.0% -9.0%, AI:2.0% -6.0%, mg:0.3 to 1.8 percent, putting the raw materials into a high-temperature smelting furnace for first high-temperature smelting, wherein the smelting temperature is 800 to 920 ℃, and taking the following raw materials in parts by weight: ni:0.2% -1.2%, cr: 0.008-0.02 percent, adding the raw materials into the raw materials smelted for the first time, fully stirring and mixing the raw materials, then carrying out secondary high-temperature smelting, wherein the smelting temperature is 870-970 ℃, carrying out refining treatment on the raw materials smelted for the second time for 30-50 min, the refining temperature is 700-780 ℃, carrying out degassing, deslagging and homogenizing treatment on the refined materials, pouring the materials into a mold, casting and molding the materials to obtain blanks with fixed size, putting the cast and molded blanks into water for quenching, wherein the quenching temperature is 30-50 ℃, cleaning the surfaces of the blanks by using sand flow and carrying out deoxidation operation to obtain blank plugs, tempering the blank plugs, carrying out tempering treatment on the blank plugs, wherein the tempering time is 5-8 h, the tempering temperature is 200-280 ℃, finely turning the tempered and cooled blank plugs to ensure that the size of the joint plugs meets the standard, the method comprises the steps of immersing a joint bolt into molten zinc which is melted at a high temperature of 480 ℃ for zinc immersion treatment, galvanizing the surface of the joint bolt to play a role of corrosion prevention, finally obtaining the required joint bolt, carrying out high-temperature melting twice on the raw materials added twice to enable the raw materials to be fully mixed uniformly so as to ensure the quality of the joint bolt in the later period, carrying out quenching tempering treatment on the joint bolt in the later period so as to improve the overall quality strength of the joint bolt, carrying out hot-dip galvanizing treatment on the joint bolt so as to enable the surface of the joint bolt to be galvanized so as to improve the corrosion prevention effect of the joint bolt so as to improve the durability of the joint bolt, thereby integrally improving the strength quality of the joint bolt so as to enable the joint bolt to be more durable, carrying out refining treatment on the raw materials which are melted at the high temperature, reducing impurities in the raw materials which are refined, improving the overall purity of the raw materials, and further improving the overall quality of the joint bolt obtained in the later period, the material is then subjected to degassing, deslagging and homogenizing treatment, the air and impurity content in the material can be reduced through the degassing, deslagging and homogenizing treatment, the hardness of the joint bolt obtained in the later period is improved, the quenched blank is subjected to sand blasting treatment, high-speed flowing friction is performed on the surface of the blank through sand flow, an oxide film on the surface of the blank is ground after the friction of the sand flow, oxide skin is attached to the surface of the joint bolt, the surface of the joint bolt can be corroded, the service life of the joint bolt is shortened, and the oxide skin formed on the surface of the joint bolt is removed through the high-speed sand flow, so that the corrosion resistance of the whole joint bolt is improved, and the service life of the joint bolt is prolonged.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A novel joint bolt production process is characterized in that: the method comprises the following working steps:
the first step is as follows: the preparation method comprises the following steps of proportioning and smelting, wherein the raw materials in parts by weight are as follows: 70-85% of Fe, si:6.0% -13%, C:3.0% -7.0%, cu:3.0% -9.0%, AI:2.0% -6.0%, mg:0.3 to 1.8 percent of the raw materials are put into a high-temperature smelting furnace for first high-temperature smelting, and the smelting temperature is 800 to 920 ℃;
the second step is that: performing secondary high-temperature smelting, and taking the following raw materials in parts by weight: ni:0.2% -1.2%, cr:0.008% -0.02%, adding the raw materials into the raw materials smelted for the first time, fully stirring and mixing, and then carrying out secondary high-temperature smelting;
the third step: refining, namely refining the raw materials subjected to secondary high-temperature smelting;
the fourth step: casting, namely degassing, deslagging and homogenizing the refined materials, and injecting the materials into a mold for casting and molding to obtain a blank with a fixed size;
the fifth step: quenching, namely putting the cast blank into water for quenching;
and a sixth step: sand blasting, namely cleaning the surface of the blank by using sand flow and carrying out deoxidation operation to obtain a joint bolt blank;
the seventh step: tempering, namely tempering the joint plug blank;
eighth step: turning, namely finely turning the tempered and cooled joint bolt blank so that the size of the joint bolt meets the standard;
the ninth step: and (3) performing surface galvanization, namely immersing the joint bolt into a zinc liquid melted at a high temperature of 480 ℃ for galvanization, and performing surface galvanization on the joint bolt to achieve an anti-corrosion effect, thereby finally obtaining the required joint bolt.
2. A new process for the production of a joint pin according to claim 1, characterized in that: the first step comprises the following raw materials in parts by weight: 70% of Fe, and Si:6.0%, C:3.0%, cu:3.0%, AI:2.0%, mg:0.3 percent.
3. A new process for the production of a joint pin according to claim 1, characterized in that: the first step comprises the following raw materials in parts by weight: 75% of Fe, and Si:8.0%, C:5.0%, cu:6.0%, AI:4.0%, mg:0.8 percent.
4. A new process for the production of a joint pin according to claim 1, characterized in that: the first step comprises the following raw materials in parts by weight: 85% of Fe, si:13%, C:7.0%, cu:9.0%, AI:6.0%, mg:1.8 percent.
5. The process for producing a new joint pin according to claim 1, wherein: the high-temperature smelting temperature in the second step is 870-970 ℃.
6. A new process for the production of a joint pin according to claim 1, characterized in that: the refining time in the third step is 30min-50min, and the refining temperature is 700 ℃ -780 ℃.
7. A new process for the production of a joint pin according to claim 1, characterized in that: the quenching temperature in the fifth step is 30-50 ℃.
8. A new process for the production of a joint pin according to claim 1, characterized in that: the tempering time in the seventh step is 5-8 h, and the tempering temperature is 200-280 ℃.
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| CN202211130354.9A CN115522117A (en) | 2022-09-16 | 2022-09-16 | Novel joint bolt production process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116121632A (en) * | 2023-02-22 | 2023-05-16 | 山东华达工业设备技术有限公司 | Metallurgical equipment manufacturing process based on artificial intelligence |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116121632A (en) * | 2023-02-22 | 2023-05-16 | 山东华达工业设备技术有限公司 | Metallurgical equipment manufacturing process based on artificial intelligence |
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