CN109531071A - A kind of nut production technology - Google Patents

A kind of nut production technology Download PDF

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Publication number
CN109531071A
CN109531071A CN201811593937.9A CN201811593937A CN109531071A CN 109531071 A CN109531071 A CN 109531071A CN 201811593937 A CN201811593937 A CN 201811593937A CN 109531071 A CN109531071 A CN 109531071A
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CN
China
Prior art keywords
nut
blank
production technology
temperature
hours
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811593937.9A
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Chinese (zh)
Inventor
张叶黄
宋挺金
宋炜杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Wangda Automobile Parts Co Ltd
Original Assignee
Chongqing Wangda Automobile Parts Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Wangda Automobile Parts Co Ltd filed Critical Chongqing Wangda Automobile Parts Co Ltd
Priority to CN201811593937.9A priority Critical patent/CN109531071A/en
Publication of CN109531071A publication Critical patent/CN109531071A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/001—Heat treatment of ferrous alloys containing Ni
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium

Abstract

The invention discloses a kind of nut production technologies, including S1: blank is made by casting technique, the weight ratio for controlling each chemical component of blank should meet following requirements: C 0.28~0.32, Mn 0.32~0.45, Zn 0.05~0.09, Si 0.15~0.25, La 0.01~0.03, P≤0.015, S≤0.015, Ni 0.50~1.20, Sn 0.15~0.25, Al 0.15~0.25, Mo 0.2~0.5, surplus are iron；S2: blank is put into mold cavity, and nut blank is made in cold-heading extrusion forming；S3: turning, tapping are carried out to nut blank；S4: heat treatment；S5: oil removing is cleaned in surface treatment, and preservative is sprayed on nut using electrostatic means, the nut after spraying is solidified to obtain nut finished product by blackening process.Hardness number, intensity value needed for the nut that nut production technology of the invention is produced has reached high strength nut, are not easy to be corroded, long service life.

Description

A kind of nut production technology
Technical field
The present invention relates to nut processing technique field, especially a kind of nut production technology.
Background technique
Nut is common fastener in machinery industry, and current processing method is generally the molding of turning, and intensity is often It is difficult to ensure, the dangerous phenomenon such as produces fracture in use sometimes, industrial production is endangered very big.Therefore to high strength nut Production method is studied and is improved, it is ensured that the quality stability of high strength nut has technology and expanding economy important Effect.In addition, get rusty easily corrosion when nut is in the environment of relative humidity, fracture or crackle are eventually led to, is formed potential Accident source.
Summary of the invention
For the deficiency of the above technology, it is an object of the invention to provide a kind of nut production technologies.
It is realized the purpose of the present invention is technical solution in this way, a kind of nut production technology, procedure of processing includes:
S1: being made blank by casting technique, and the weight ratio for controlling each chemical component of blank should meet following want It asks: C 0.28~0.32, Mn 0.32~0.45, Zn 0.05~0.09, Si 0.15~0.25, La 0.01~0.03, P≤ 0.015, S≤0.015, Ni 0.50~1.20, Sn 0.15~0.25, Al 0.15~0.25, Mo 0.2~0.5, surplus are Iron；
S2: blank is put into mold cavity, and nut blank is made in cold-heading extrusion forming；
S3: turning, tapping are carried out to nut blank；
S4: heat treatment heats nut blank 3 hours at 900 DEG C, then furnace temperature is warming up to 1100 DEG C, keeps adding Hot 3 hours, quenching of then coming out of the stove place into furnace after quenching, and furnace temperature is warming up to 550 DEG C, keeps the temperature 6-8 hours, then come out of the stove It is cooling with aqueous quenching liquid；It is quenched at 900 DEG C with quenching oil, carries out air-cooled after 4 hours, returned when being cooled to 500 DEG C Fire, tempering temperature are 650 DEG C, and tempering time is 15 hours, last cooled to room temperature；
S5: oil removing is cleaned in surface treatment, and preservative is sprayed on nut using electrostatic means, will be sprayed by blackening process Nut afterwards is solidified to obtain nut finished product.
Further, in the step S5, the cleaning greasy dirt is cleaned using alkaline degreaser, and cleaning temperature is 25-35℃。
Further, in the step S5, the blackening process is room temperature blackening under conditions of pH value is 0.2~0.5 Handle 6 hours.
Further, sprayed in the step S5 with a thickness of 100 μm.
Further, the electrostatic pressure of the electrostatic spraying in the step S5 is 45~55KV, electrostatic current 60-70uA, mist Change pressure is 0.2-0.3MPa, spray distance 180-200mm.
Further, cured temperature is 120 DEG C in the step S5, and curing time is 0.5 hour.
By adopting the above-described technical solution, the invention has the benefit that silicon, manganese contains present invention reduces sulphur, phosphorus Amount, and increases the content of molybdenum, can not only reach the requirement of high strength nut in intensity and hardness, and due to chemistry at The change divided, microscopic structure also change, and reduction phosphorus, sulfur content can not only improve the plasticity and toughness and delayed fracture resistance of steel Performance can also improve the cold-forming property of steel, and hardness number needed for having reached high strength nut, intensity value solve high-strength The delayed fracture and fatigue fracture of lower nut are spent, connection is reliable in use, is not easily broken, improves bolt life, meets Use demand of the every profession and trade to high strength nut in society.The spraying of preservative can be such that preservative firmly attaches in nut On, avoiding nut, there is a situation where corrosions in use, extend the service life of nut.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke To be instructed from the practice of the present invention.Target of the invention and other advantages can be realized by following specification and It obtains.
Specific embodiment
Below with reference to embodiment, the invention will be further described.
The invention discloses a kind of nut production technology, procedure of processing includes:
S1: being made blank by casting technique, and the weight ratio for controlling each chemical component of blank should meet following want It asks: C 0.28~0.32, Mn 0.32~0.45, Zn 0.05~0.09, Si 0.15~0.25, La 0.01~0.03, P≤ 0.015, S≤0.015, Ni 0.50~1.20, Sn 0.15~0.25, Al 0.15~0.25, Mo 0.2~0.5, surplus are Iron；
S2: blank is put into mold cavity, and nut blank is made in cold-heading extrusion forming；
S3: turning, tapping are carried out to nut blank；
S4: heat treatment heats nut blank 3 hours at 900 DEG C, then furnace temperature is warming up to 1100 DEG C, keeps adding Hot 3 hours, quenching of then coming out of the stove place into furnace after quenching, and furnace temperature is warming up to 550 DEG C, keeps the temperature 6-8 hours, then come out of the stove It is cooling with aqueous quenching liquid；It is quenched at 900 DEG C with quenching oil, carries out air-cooled after 4 hours, returned when being cooled to 500 DEG C Fire, tempering temperature are 650 DEG C, and tempering time is 15 hours, last cooled to room temperature；
S5: oil removing is cleaned in surface treatment, and preservative is sprayed on nut using electrostatic means, will be sprayed by blackening process Nut afterwards is solidified to obtain nut finished product.
In the step S5, the cleaning greasy dirt is cleaned using alkaline degreaser, and cleaning temperature is 25-35 DEG C.
In the step S5, the blackening process is that room temperature blackening processing is 6 small under conditions of pH value is 0.2~0.5 When.
Sprayed in the step S5 with a thickness of 100 μm.
The electrostatic pressure of electrostatic spraying in the step S5 is 45~55KV, electrostatic current 60-70uA, and atomizing pressure is 0.2-0.3MPa, spray distance 180-200mm.
Cured temperature is 120 DEG C in the step S5, and curing time is 0.5 hour.
Present invention reduces sulphur, phosphorus, silicon, the contents of manganese, and increase the content of molybdenum, not only can in intensity and hardness Reach the requirement of high strength nut, and due to the change of chemical component, microscopic structure also changes, reduces phosphorus, sulphur contains Amount can not only improve the plasticity and toughness and resistance for delayed fracture of steel, can also improve the cold-forming property of steel, reach high-strength Hardness number, intensity value needed for spending nut, solve the delayed fracture and fatigue fracture of high-intensitive lower nut, connect in use Reliably, it is not easily broken, improves bolt life, meet in society every profession and trade to the use demand of high strength nut.Preservative Spraying preservative can be made firmly to attach on nut, avoid nut in use there is a situation where corrosion, Extend the service life of nut.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention Art scheme is modified or replaced equivalently, and without departing from the objective and range of the technical program, should all be covered in the present invention Scope of the claims in.

Claims (6)

1. a kind of nut production technology, it is characterised in that: procedure of processing includes:
S1: being made blank by casting technique, and the weight ratio for controlling each chemical component of blank should meet following requirements: C 0.28~0.32, Mn 0.32~0.45, Zn 0.05~0.09, Si 0.15~0.25, La 0.01~0.03, P≤0.015, S ≤ 0.015, Ni 0.50~1.20, Sn 0.15~0.25, Al 0.15~0.25, Mo 0.2~0.5, surplus are iron；
S2: blank is put into mold cavity, and nut blank is made in cold-heading extrusion forming；
S3: turning, tapping are carried out to nut blank；
S4: heat treatment heats nut blank 3 hours at 900 DEG C, then furnace temperature is warming up to 1100 DEG C, keeps heating 3 Hour, quenching of then coming out of the stove places into furnace after quenching, and furnace temperature is warming up to 550 DEG C, keeps the temperature 6-8 hours, then come out of the stove with aqueous Quenching liquid is cooling；It is quenched at 900 DEG C with quenching oil, air-cooled, tempering when being cooled to 500 DEG C is carried out after 4 hours, be tempered Temperature is 650 DEG C, and tempering time is 15 hours, last cooled to room temperature；
S5: oil removing is cleaned in surface treatment, and blackening process is sprayed to preservative on nut using electrostatic means, after spraying Nut is solidified to obtain nut finished product.
2. nut production technology according to claim 1, it is characterised in that: in the step S5, the cleaning greasy dirt is adopted It is cleaned with alkaline degreaser, cleaning temperature is 25-35 DEG C.
3. nut production technology according to claim 1, it is characterised in that: in the step S5, the blackening process is Room temperature blackening handles 6 hours under conditions of pH value is 0.2~0.5.
4. nut production technology according to claim 1, it is characterised in that: sprayed in the step S5 with a thickness of 100 μ m。
5. nut production technology according to claim 1, it is characterised in that: the electrostatic of the electrostatic spraying in the step S5 Pressure is 45~55KV, electrostatic current 60-70uA, atomizing pressure 0.2-0.3MPa, spray distance 180-200mm.
6. nut production technology according to claim 1, it is characterised in that: cured temperature is 120 in the step S5 DEG C, curing time is 0.5 hour.
CN201811593937.9A 2018-12-25 2018-12-25 A kind of nut production technology Pending CN109531071A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811593937.9A CN109531071A (en) 2018-12-25 2018-12-25 A kind of nut production technology

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811593937.9A CN109531071A (en) 2018-12-25 2018-12-25 A kind of nut production technology

Publications (1)

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CN109531071A true CN109531071A (en) 2019-03-29

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110439904A (en) * 2019-07-19 2019-11-12 苏州中新精密工业有限公司 A kind of nut and its production technology
CN110479936A (en) * 2019-08-20 2019-11-22 王丽 A kind of Closely locking nut production method
CN112222785A (en) * 2020-10-20 2021-01-15 苏州市正如懿电子科技有限公司 Copper nut machining process
CN112474181A (en) * 2020-12-09 2021-03-12 王侠 Nut production method
CN112589398A (en) * 2020-12-29 2021-04-02 苏州力迩美精密电子有限公司 Processing technology of high-temperature-resistant water inlet valve spring
CN113564312A (en) * 2021-06-25 2021-10-29 江苏锦瑞金属制品有限公司 Nut production method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102943207A (en) * 2012-11-09 2013-02-27 谢亚平 High-strength fastener and processing method thereof
CN104227358A (en) * 2014-09-16 2014-12-24 浙江新东方汽车零部件有限公司 Production technology for nut special for commercial vehicle
CN108031625A (en) * 2018-01-09 2018-05-15 海宁迪万沃浦建材科技有限公司 A kind of nut surface corrosion-resistant processing method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102943207A (en) * 2012-11-09 2013-02-27 谢亚平 High-strength fastener and processing method thereof
CN104227358A (en) * 2014-09-16 2014-12-24 浙江新东方汽车零部件有限公司 Production technology for nut special for commercial vehicle
CN108031625A (en) * 2018-01-09 2018-05-15 海宁迪万沃浦建材科技有限公司 A kind of nut surface corrosion-resistant processing method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110439904A (en) * 2019-07-19 2019-11-12 苏州中新精密工业有限公司 A kind of nut and its production technology
CN110479936A (en) * 2019-08-20 2019-11-22 王丽 A kind of Closely locking nut production method
CN112222785A (en) * 2020-10-20 2021-01-15 苏州市正如懿电子科技有限公司 Copper nut machining process
CN112474181A (en) * 2020-12-09 2021-03-12 王侠 Nut production method
CN112589398A (en) * 2020-12-29 2021-04-02 苏州力迩美精密电子有限公司 Processing technology of high-temperature-resistant water inlet valve spring
CN113564312A (en) * 2021-06-25 2021-10-29 江苏锦瑞金属制品有限公司 Nut production method

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Application publication date: 20190329