CN109048236A - The processing technology of high-strength big six-angle spiral - Google Patents
The processing technology of high-strength big six-angle spiral Download PDFInfo
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- CN109048236A CN109048236A CN201811245866.3A CN201811245866A CN109048236A CN 109048236 A CN109048236 A CN 109048236A CN 201811245866 A CN201811245866 A CN 201811245866A CN 109048236 A CN109048236 A CN 109048236A
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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
- 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
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- 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
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- 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
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- 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
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- 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
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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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
- 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
- C23C24/00—Coating starting from inorganic powder
- C23C24/02—Coating starting from inorganic powder by application of pressure only
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Abstract
The present invention relates to the processing technologys of high-strength big six-angle spiral, belong to the processing technique field of spare and accessory parts.The processing technology includes the following steps: cooling after melting steel alloy used in high-strength big six-angle spiral, and the big hexagon head bolt blank including nut and shank of bolt is made；Screw thread is processed on the surface of shank of bolt, obtains big hexagon head bolt semi-finished product；Big hexagon head bolt semi-finished product are first quenched at 880-930 DEG C, then carry out tempering at 220-250 DEG C again；Big hexagon head bolt surface of semi-finished after tempering sprays SiC composite film, obtains big hexagon head bolt finished product.The processing technology of hexagon-headed bolt of the present invention sprays SiC composite film in bolt surface after heat treatment, and hexagon-headed bolt is made of the reasonable material of compatibility, by the content for optimizing other chemical components, due to the change of chemical component, its microscopic structure also changes, and then improves the intensity of hexagon-headed bolt.
Description
Technical field
The present invention relates to the processing technologys of high-strength big six-angle spiral, belong to the processing technique field of spare and accessory parts.
Background technique
Hex head screw Hex cap screw and big hex bolts Hex bolt is that head is the outer of hexangle type as its name suggests
Threaded fasteners are designed as rotating using spanner.According to ASME B18.2.1 standard, hex head screw (Hex cap screw) compared with
The head height and the long tolerance of bar of general big hex bolts (Hex bolt) are small, therefore ASME B18.2.1 hex screw is adapted to fit
It also include the too big and non-serviceable place of big hex bolts in the place that all hex bolts can be used.
Soket head cap screw mainly has three kinds of carbon steel, stainless steel, copper materials currently on the market.
(1) carbon steel.We distinguish mild steel, medium carbon steel and high-carbon steel and steel alloy with the content of carbon in carbon steel material.
1, it is commonly referred to as A3 steel that mild steel C%≤0.25% is domestic.Foreign countries are generally referred to as 1008,1015,1018,1022
Deng.It is mainly used for the product (note: main 1022 materials of drilling tail nail without hardness requirement such as 4.8 grade bolts and 4 grades of nuts, primary screws
Material).
2, medium carbon steel 0.25%0.45%.It is basic currently on the market not use.
3, steel alloy: adding alloying element in straight carbon steel, increases some properties of steel: such as 35,40 chrome molybdenums,
SCM435,10B38.The raw screw of virtue mainly uses SCM435 chrome-moly steel, and main component has C, Si, Mn, P, S, Cr, Mo.
(2) stainless steel.Performance rate: 45,50,60,70,80 mainly divide austenite (18%Cr, 8%Ni) heat-resist,
Good corrosion resistance, solderability are good.A1, A2, A4 martensite, 13%Cr corrosion resistance are poor, and intensity is high, and wearability is good.C1, C2,
C4 ferritic stainless steel.18%Cr upsetting is preferable, and corrosion resistance is better than martensite.Imported material is mainly day currently on the market
This product.Mainly divide SUS302, SUS304, SUS316 by rank.
(3) copper.Common used material is brass pltine.Standard component mainly is made with H62, H65, H68 copper in the market.Carbon steel
The member of disk used in product: 2 6.8 grades of 1010 1015K of 1 4.8 grades of hex screw 1008K of the available material of serial number type
Hex screw.
However the intensity of currently used big hexagon head bolt is still lower, it is also necessary to the further high-intensitive big turret head of research
Bolt.
Summary of the invention
The purpose of the present invention is being directed to the above-mentioned problems in the prior art, adding for high-strength big six-angle spiral is provided
Work technique.
Object of the invention can be realized by the following technical scheme: the processing technology of high-strength big six-angle spiral, institute
The processing technology stated includes the following steps:
Will be cooling after the fusing of steel alloy used in high-strength big six-angle spiral, it is made big by six including nut and shank of bolt
Hex bolt blank；
Screw thread is processed on the surface of shank of bolt, obtains big hexagon head bolt semi-finished product；
Big hexagon head bolt semi-finished product are first quenched at 880-930 DEG C, are then carried out at tempering at 220-250 DEG C again
Reason；
Big hexagon head bolt surface of semi-finished after tempering sprays SiC composite film, obtain big hexagon head bolt at
Product.
In the processing technology of above-mentioned high-strength big six-angle spiral, conjunction used in the high-strength big six-angle spiral
The component and its mass percent of Jin Gang are as follows: C:0.15-0.25%, Cr:1.5-2.0%, Si:0.17-0.25%, Mn:
0.08-0.2%, Al:0.05-0.1%, Nb:0.03-0.06%, Cu:0.05-0.2%, V:0.05-0.1%, Ni:0.1-
0.2%, Ce:0.005-0.01%, Ti:0.005-0.02%, S:0.005-0.03%, P≤0.015%, surplus is for Fe and not
Evitable impurity.
Preferably, Nb+Ti:0.04-0.06% in steel alloy used in high-strength big six-angle spiral.
In the processing technology of above-mentioned high-strength big six-angle spiral, the SiC composite film with a thickness of 3-5 μm.
In the processing technology of above-mentioned high-strength big six-angle spiral, the SiC composite film is by SiC powder and bonding
Agent is mixed to form mixture, then by mixture even application in big hexagon head bolt surface of semi-finished, when mixture partly solidifies, sprays table
Face activating agent, natural coagulation form SiC composite film.
Preferably, the surfactant is one of neopelex, fatty glyceride or two
Kind.
Compared with prior art, the present invention has the advantage that
1. the processing technology of hexagon-headed bolt of the present invention sprays SiC composite film in bolt surface after heat treatment, into one
Step improves intensity.
2. hexagon-headed bolt of the present invention is made of the reasonable material of compatibility, by optimizing the content of other chemical components,
Due to the change of chemical component, microscopic structure also changes, and then improves the intensity of hexagon-headed bolt.
Specific embodiment
The following is specific embodiments of the present invention, illustrates that technical scheme of the present invention will be further described, but this hair
It is bright to be not limited to these examples.
Embodiment 1
The processing technology of high-strength big six-angle spiral, the processing technology include the following steps:
Will be cooling after the fusing of steel alloy used in high-strength big six-angle spiral, it is made big by six including nut and shank of bolt
Hex bolt blank；The component and its mass percent of steel alloy used in high-strength big six-angle spiral are as follows: C:
0.2%, Cr:1.8%, Si:0.22%, Mn:0.15%, Al:0.08%, Nb:0.04%, Cu:0.12%, V:0.07%, Ni:
0.15%, Ce:0.008%, Ti:0.01%, S:0.02%, P≤0.015%, surplus are Fe and inevitable impurity；In spiral shell
The surface of tightening latch processes screw thread, obtains big hexagon head bolt semi-finished product；
Big hexagon head bolt semi-finished product are first quenched at 900 DEG C, then carry out tempering at 230 DEG C again；
The SiC composite film that big hexagon head bolt surface of semi-finished coating thickness after tempering is 4 μm, obtains greatly six
Hex bolt finished product.Wherein, the SiC composite film is to be mixed to form mixture by SiC powder and binder 1:2 in mass ratio,
Again by mixture even application in big hexagon head bolt surface of semi-finished, when mixture partly solidifies, spraying accounts for soul agent gross mass 3%
Surfactant sodium dodecyl base benzene sulfonic acid sodium salt, natural coagulation form SiC composite film.
Embodiment 2
The processing technology of high-strength big six-angle spiral, the processing technology include the following steps:
Will be cooling after the fusing of steel alloy used in high-strength big six-angle spiral, it is made big by six including nut and shank of bolt
Hex bolt blank；The component and its mass percent of steel alloy used in high-strength big six-angle spiral are as follows: C:
0.25%, Cr:1.5%, Si:0.25%, Mn:0.08%, Al:0.1%, Nb:0.03%, Cu:0.2%, V:0.05%, Ni:
0.2%, Ce:0.005%, Ti:0.02%, S:0.005%, P≤0.015%, surplus are Fe and inevitable impurity；
Screw thread is processed on the surface of shank of bolt, obtains big hexagon head bolt semi-finished product；
Big hexagon head bolt semi-finished product are first quenched at 880 DEG C, then carry out tempering at 220 DEG C again；
The SiC composite film that big hexagon head bolt surface of semi-finished coating thickness after tempering is 5 μm, obtains greatly six
Hex bolt finished product.Wherein, the SiC composite film is to be mixed to form mixture by SiC powder and binder 1:1 in mass ratio,
Again by mixture even application in big hexagon head bolt surface of semi-finished, when mixture partly solidifies, spraying accounts for soul agent gross mass 2%
Surfactant fatty acid glyceride, natural coagulation form SiC composite film.
Embodiment 3
The processing technology of high-strength big six-angle spiral, the processing technology include the following steps:
Will be cooling after the fusing of steel alloy used in high-strength big six-angle spiral, it is made big by six including nut and shank of bolt
Hex bolt blank；The component and its mass percent of steel alloy used in high-strength big six-angle spiral are as follows: C:
0.15%, Cr:2.0%, Si:0.17%, Mn:0.2%, Al:0.05%, Nb:0.06%, Cu:0.05%, V:0.1%, Ni:
0.1%, Ce:0.01%, Ti:0.005%, S:0.03%, P≤0.015%, surplus are Fe and inevitable impurity；
Screw thread is processed on the surface of shank of bolt, obtains big hexagon head bolt semi-finished product；
Big hexagon head bolt semi-finished product are first quenched at 930 DEG C, then carry out tempering at 250 DEG C again；
The SiC composite film that big hexagon head bolt surface of semi-finished coating thickness after tempering is 3 μm, obtains greatly six
Hex bolt finished product.Wherein, the SiC composite film is to be mixed to form mixture by SiC powder and binder 1:3 in mass ratio,
Again by mixture even application in big hexagon head bolt surface of semi-finished, when mixture partly solidifies, spraying accounts for soul agent gross mass 2%
Neopelex and 2% fatty glyceride, natural coagulation form SiC composite film.
Comparative example 1
Compared with Example 3, comparative example 1 does not spray SiC composite film in big hexagon head bolt surface of semi-finished.
To the tensile strength sigma b of high-strength big six-angle spiral made from embodiment 1-3, tensile strength σ s, detect,
Testing result is as shown in table 1:
Table 1: high-strength big six-angle spiral obtained and commercially available height in the prior art in embodiment 1-3 and comparative example 1
The performance test results of intensity big hexagon head bolt
In conclusion the processing technology of hexagon-headed bolt of the present invention sprays SiC composite membrane in bolt surface after heat treatment
Layer and hexagon-headed bolt are made of the reasonable material of compatibility, by optimizing the content of other chemical components, due to chemistry at
The change divided, microscopic structure also change, and then improve the intensity of hexagon-headed bolt.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can do various modifications or supplement or is substituted in a similar manner to described specific embodiment, but simultaneously
Spirit or beyond the scope defined by the appended claims of the invention is not deviated by.
It is skilled to this field although present invention has been described in detail and some specific embodiments have been cited
For technical staff, as long as it is obvious for can making various changes or correct without departing from the spirit and scope of the present invention.
Claims (6)
1. the processing technology of high-strength big six-angle spiral, which is characterized in that the processing technology includes the following steps:
Will be cooling after the fusing of steel alloy used in high-strength big six-angle spiral, the big turret head including nut and shank of bolt is made
Bolt blank；
Screw thread is processed on the surface of shank of bolt, obtains big hexagon head bolt semi-finished product；
Big hexagon head bolt semi-finished product are first quenched at 880-930 DEG C, then carry out tempering at 220-250 DEG C again；
Big hexagon head bolt surface of semi-finished after tempering sprays SiC composite film, obtains big hexagon head bolt finished product.
2. the processing technology of high-strength big six-angle spiral according to claim 1, which is characterized in that the high intensity
The component and its mass percent of steel alloy used in big hexagon head bolt are as follows: C:0.15-0.25%, Cr:1.5-
2.0%, Si:0.17-0.25%, Mn:0.08-0.2%, Al:0.05-0.1%, Nb:0.03-0.06%, Cu:0.05-
0.2%, V:0.05-0.1%, Ni:0.1-0.2%, Ce:0.005-0.01%, Ti:0.005-0.02%, S:0.005-
0.03%, P≤0.015%, surplus are Fe and inevitable impurity.
3. the processing technology of high-strength big six-angle spiral according to claim 2, which is characterized in that high-intensitive big hexagonal
Nb+Ti:0.04-0.06% in steel alloy used in hook bolt.
4. the processing technology of high-strength big six-angle spiral according to claim 1, which is characterized in that the SiC is compound
Film layer with a thickness of 3-5 μm.
5. the processing technology of high-strength big six-angle spiral according to claim 1, which is characterized in that the SiC is compound
Film layer is that mixture is mixed to form by SiC powder and binder, then by mixture even application in big hexagon head bolt surface of semi-finished,
When mixture partly solidifies, sprayed surface activating agent, natural coagulation forms SiC composite film.
6. the processing technology of high-strength big six-angle spiral according to claim 5, which is characterized in that the surface is living
Property agent be one or both of neopelex, fatty glyceride.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811245866.3A CN109048236A (en) | 2018-10-25 | 2018-10-25 | The processing technology of high-strength big six-angle spiral |
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| CN201811245866.3A CN109048236A (en) | 2018-10-25 | 2018-10-25 | The processing technology of high-strength big six-angle spiral |
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Cited By (2)
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| CN109957722A (en) * | 2019-04-10 | 2019-07-02 | 宁波瑞国精机工业有限公司 | A kind of self-locking position pin |
| CN111961808A (en) * | 2020-07-28 | 2020-11-20 | 苏州剑派实业有限公司 | Preparation method of high-strength corrosion-resistant hexagon head bolt |
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| CN111961808A (en) * | 2020-07-28 | 2020-11-20 | 苏州剑派实业有限公司 | Preparation method of high-strength corrosion-resistant hexagon head bolt |
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Application publication date: 20181221 |