CN107513672A - A kind of preparation technology of high-strength stainless steel hex bolts - Google Patents

A kind of preparation technology of high-strength stainless steel hex bolts Download PDF

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Publication number
CN107513672A
CN107513672A CN201711000444.5A CN201711000444A CN107513672A CN 107513672 A CN107513672 A CN 107513672A CN 201711000444 A CN201711000444 A CN 201711000444A CN 107513672 A CN107513672 A CN 107513672A
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CN
China
Prior art keywords
saponification
cold
bolt
stainless steel
annealing
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Pending
Application number
CN201711000444.5A
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Chinese (zh)
Inventor
徐建华
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.)
Suzhou Huafeng Stainless Steel Fastener Co Ltd
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Suzhou Huafeng Stainless Steel Fastener Co Ltd
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Application filed by Suzhou Huafeng Stainless Steel Fastener Co Ltd filed Critical Suzhou Huafeng Stainless Steel Fastener Co Ltd
Priority to CN201711000444.5A priority Critical patent/CN107513672A/en
Publication of CN107513672A publication Critical patent/CN107513672A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26Methods of annealing
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0093Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for screws; for bolts
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C22/00Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/73Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process

Abstract

The invention discloses a kind of preparation technology of high-strength stainless steel hex bolts, successively using the technological process of dispensing, melting, cold-heading molding, heat treatment and phospholeum, is specially:Chosen according to mass percent, raw material, then raw material is mixed in input vacuum melting furnace and carries out melt process, obtain aluminium alloy;Above-mentioned aluminium alloy is subjected to cold-heading processing with cold headers again, molds head and the bar portion of bolt;The bolt of cold-heading molding is put into annealing furnace, then uses the oxygen in n 2 annealing stove all to discharge, is then made annealing treatment, room temperature is then cooled to by the way of air-cooled;The bolt being heat-treated after terminating first is put into phosphating pond and carries out phosphorating treatment, places into progress saponification process in saponification pond, through the above way, the present invention can greatly improve the strength character of stainless steel bolt, and preparation flow is simple, cost is low, the sustainable service life length in later stage.

Description

A kind of preparation technology of high-strength stainless steel hex bolts
Technical field
The present invention relates to a kind of preparation method, more particularly to a kind of preparation technology of high-strength stainless steel hex bolts.
Background technology
In the standard component of the industries such as Aeronautics and Astronautics, high ferro, high-strength bolt is often in some intensity requirements height, work Make bad environments(Such as high vibration, high air humidity, the temperature difference are big)Under conditions of assemble the fastener used, at present, China one As in use carbon and low-alloy unimach make high-strength bolt(σ b >=1500MPa), during use under high stress Brittle fracture easily occurs, i.e. hydrogen embrittlement is easily caused the appearance for the dangerous phenomenons such as bolt is turned around, bar portion is broken, therefore for bolt Strength character certainly will need to be further strengthened.
The content of the invention
, can the present invention solves the technical problem of a kind of preparation technology of high-strength stainless steel hex bolts is provided The strength character of stainless steel bolt is greatly improved, and preparation flow is simple, cost is low, the sustainable service life length in later stage.
In order to solve the above technical problems, one aspect of the present invention is:A kind of high-strength stainless steel six is provided The preparation technology of corner bolt, specifically comprises the following steps:
(1)Dispensing:The raw material of following composition proportion is chosen according to mass percent:Manganese accounts for 2.2-3.2%, silicon accounts for 1.3-2.1%, aluminium Account for 0.8-1.6%, molybdenum accounts for 1.0-1.4%, titanium accounts for 2.0-2.8%, chromium accounts for 6.8-8.4%, nickel accounts for 9.6-13.2%, surplus is iron and not Evitable impurity;
(2)Melting:Above-mentioned raw materials are mixed in input vacuum melting furnace and carry out melt process, obtain aluminium alloy, melting temperature is 960-1000℃;
(3)Cold-heading molding:Above-mentioned aluminium alloy is subjected to cold-heading processing using cold headers, molds head and the bar portion of bolt;
(4)Heat treatment:The bolt of cold-heading molding is put into annealing furnace, then uses the oxygen in n 2 annealing stove all to discharge, Then made annealing treatment, annealing temperature is 780-820 DEG C, annealing time 2-3h, is then cooled to by the way of air-cooled Room temperature, wind-warm syndrome are 0-20 DEG C;
(5)Phospholeum:The bolt being heat-treated after terminating first is put into phosphating pond and carries out phosphorating treatment, phosphatization temperature 50-80 DEG C, phosphating time 5-15min, progress saponification process in saponification pond is placed into, saponification temperature is 40-60 DEG C, and saponification time is 3-7min。
In a preferred embodiment of the present invention, the step(5)In, set between the phosphating pond and the saponification pond There are clear water reserviors.
In a preferred embodiment of the present invention, the step(5)In phosphating pond in phosphating solution be acidity in 20Kg/L The film agent aqueous solution.
In a preferred embodiment of the present invention, the step(5)In saponification pond in saponification liquor be concentration 10% hydrogen-oxygen Change sodium water solution.
The beneficial effects of the invention are as follows:A kind of preparation technology of high-strength stainless steel hex bolts of the present invention, by work Skill flow and each technological parameter reasonably optimize and improve, and carry out phosphorus saponification process, energy to product after heat treatment The strength character of stainless steel bolt, and the sustainable service life length in later stage are enough greatly improved, prepared by whole process convenient, production Cost is relatively low.
Embodiment
Presently preferred embodiments of the present invention is described in detail below so that advantages and features of the invention can be easier to by It will be appreciated by those skilled in the art that apparent clearly defined so as to be made to protection scope of the present invention.
Embodiment 1:
A kind of preparation technology of high-strength stainless steel hex bolts, specifically comprises the following steps:
(1)Dispensing:The raw material of following composition proportion is chosen according to mass percent:Manganese account for 2.2%, silicon account for 2.1%, aluminium account for 0.8%, Molybdenum, which accounts for 1.4%, titanium and accounts for 2.8%, chromium and account for 6.8%, nickel, accounts for 13.2%, and surplus is iron and inevitable impurity;
(2)Melting:Above-mentioned raw materials are mixed in input vacuum melting furnace and carry out melt process, obtain aluminium alloy, melting temperature 960 ℃;
(3)Cold-heading molding:Above-mentioned aluminium alloy is subjected to cold-heading processing using cold headers, molds head and the bar portion of bolt;
(4)Heat treatment:The bolt of cold-heading molding is put into annealing furnace, then uses the oxygen in n 2 annealing stove all to discharge, Then made annealing treatment, annealing temperature is 780 DEG C, annealing time 3h, room temperature, wind is then cooled to by the way of air-cooled Temperature is 0 DEG C;
(5)Phospholeum:The bolt being heat-treated after terminating first is put into phosphating pond and carries out phosphorating treatment, phosphatization temperature is 80 DEG C, Phosphating time is 5min, places into progress saponification process in saponification pond, and saponification temperature is 40 DEG C, saponification time 7min.
Embodiment 2:
A kind of preparation technology of high-strength stainless steel hex bolts, specifically comprises the following steps:
(1)Dispensing:The raw material of following composition proportion is chosen according to mass percent:Manganese account for 3.2%, silicon account for 1.3%, aluminium account for 1.6%, Molybdenum, which accounts for 1.0%, titanium and accounts for 2.0%, chromium and account for 8.4%, nickel, accounts for 9.6%, and surplus is iron and inevitable impurity;
(2)Melting:Above-mentioned raw materials are mixed in input vacuum melting furnace and carry out melt process, obtain aluminium alloy, melting temperature is 1000℃;
(3)Cold-heading molding:Above-mentioned aluminium alloy is subjected to cold-heading processing using cold headers, molds head and the bar portion of bolt;
(4)Heat treatment:The bolt of cold-heading molding is put into annealing furnace, then uses the oxygen in n 2 annealing stove all to discharge, Then made annealing treatment, annealing temperature is 820 DEG C, annealing time 2h, room temperature, wind is then cooled to by the way of air-cooled Temperature is 20 DEG C;
(5)Phospholeum:The bolt being heat-treated after terminating first is put into phosphating pond and carries out phosphorating treatment, phosphatization temperature is 50 DEG C, Phosphating time is 15min, places into progress saponification process in saponification pond, and saponification temperature is 60 DEG C, saponification time 3min.
Embodiment 3:
A kind of preparation technology of high-strength stainless steel hex bolts, specifically comprises the following steps:
(1)Dispensing:The raw material of following composition proportion is chosen according to mass percent:Manganese account for 22.7%, silicon account for 1.7%, aluminium account for 1.2%, Molybdenum, which accounts for 1.2%, titanium and accounts for 2.4%, chromium and account for 7.6%, nickel, accounts for 11.4%, and surplus is iron and inevitable impurity;
(2)Melting:Above-mentioned raw materials are mixed in input vacuum melting furnace and carry out melt process, obtain aluminium alloy, melting temperature 980 ℃;
(3)Cold-heading molding:Above-mentioned aluminium alloy is subjected to cold-heading processing using cold headers, molds head and the bar portion of bolt;
(4)Heat treatment:The bolt of cold-heading molding is put into annealing furnace, then uses the oxygen in n 2 annealing stove all to discharge, Then being made annealing treatment, annealing temperature is 800 DEG C, annealing time 2.5h, room temperature is then cooled to by the way of air-cooled, Wind-warm syndrome is 10 DEG C;
(5)Phospholeum:The bolt being heat-treated after terminating first is put into phosphating pond and carries out phosphorating treatment, phosphatization temperature is 65 DEG C, Phosphating time is 10min, places into progress saponification process in saponification pond, and saponification temperature is 50 DEG C, saponification time 5min.
Wherein, the step(5)In, clear water reserviors are provided between the phosphating pond and the saponification pond, prevent product from existing The phosphating solution on surface enters in saponification pond after phosphorating treatment, and saponification pond is neutralized, influences saponification quality.
Further illustrate, the step(5)In phosphating pond in phosphating solution be acidity 20Kg/L the film agent aqueous solution; The step(5)In saponification pond in saponification liquor be concentration 10% sodium hydrate aqueous solution.
It is different from prior art, a kind of preparation technology of high-strength stainless steel hex bolts of the present invention, by technique stream Journey and each technological parameter reasonably optimize and improve, and carry out phosphorus saponification process, Neng Gou great to product after heat treatment Width improves the strength character of stainless steel bolt, and the sustainable service life length in later stage, and prepared by whole process convenient, production cost It is relatively low.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair The equivalent structure or equivalent flow conversion that bright description is made, or directly or indirectly it is used in other related technology necks Domain, it is included within the scope of the present invention.

Claims (4)

1. a kind of preparation technology of high-strength stainless steel hex bolts, it is characterised in that specifically comprise the following steps:
(1)Dispensing:The raw material of following composition proportion is chosen according to mass percent:Manganese accounts for 2.2-3.2%, silicon accounts for 1.3-2.1%, aluminium Account for 0.8-1.6%, molybdenum accounts for 1.0-1.4%, titanium accounts for 2.0-2.8%, chromium accounts for 6.8-8.4%, nickel accounts for 9.6-13.2%, surplus is iron and not Evitable impurity;
(2)Melting:Above-mentioned raw materials are mixed in input vacuum melting furnace and carry out melt process, obtain aluminium alloy, melting temperature is 960-1000℃;
(3)Cold-heading molding:Above-mentioned aluminium alloy is subjected to cold-heading processing using cold headers, molds head and the bar portion of bolt;
(4)Heat treatment:The bolt of cold-heading molding is put into annealing furnace, then uses the oxygen in n 2 annealing stove all to discharge, Then made annealing treatment, annealing temperature is 780-820 DEG C, annealing time 2-3h, is then cooled to by the way of air-cooled Room temperature, wind-warm syndrome are 0-20 DEG C;
(5)Phospholeum:The bolt being heat-treated after terminating first is put into phosphating pond and carries out phosphorating treatment, phosphatization temperature 50-80 DEG C, phosphating time 5-15min, progress saponification process in saponification pond is placed into, saponification temperature is 40-60 DEG C, and saponification time is 3-7min。
2. the preparation technology of high-strength stainless steel hex bolts according to claim 1, it is characterised in that the step (5)In, clear water reserviors are provided between the phosphating pond and the saponification pond.
3. the preparation technology of high-strength stainless steel hex bolts according to claim 1, it is characterised in that the step (5)In phosphating pond in phosphating solution be acidity 20Kg/L the film agent aqueous solution.
4. the preparation technology of high-strength stainless steel hex bolts according to claim 1, it is characterised in that the step (5)In saponification pond in saponification liquor be concentration 10% sodium hydrate aqueous solution.
CN201711000444.5A 2017-10-24 2017-10-24 A kind of preparation technology of high-strength stainless steel hex bolts Pending CN107513672A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110421318A (en) * 2019-07-24 2019-11-08 王丽 A kind of aero titanium alloy high locked bolts processing technology
CN111876677A (en) * 2020-07-14 2020-11-03 昆山正通铭金属有限公司 Forming process of hexagonal alloy tool steel S2

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005226150A (en) * 2004-02-16 2005-08-25 Daido Steel Co Ltd Annealing method of tool steel, production method of annealed material for tool steel, annealed material for tool steel, tool steel using the same and tool
CN1831181A (en) * 2005-03-10 2006-09-13 日立金属株式会社 Stainless steel having a high hardness and excellent mirror-finished surface property, and method of producing the same
CN101259582A (en) * 2008-04-28 2008-09-10 江阴市界达特异制管有限公司 Preparation of seamless special-shaped steel pipe for low temperature resistance oil derrick electric transmission pole tower
CN103014551A (en) * 2011-09-22 2013-04-03 兴化市新迅达不锈钢标准件有限公司 Novel high-temperature alloy heat-resistant stainless steel bolt and production process thereof
CN104480477A (en) * 2014-11-20 2015-04-01 海盐汇联通用配件有限公司 Production process of corrosion-resistant high-strength hexagon bolts
CN104791564A (en) * 2015-03-31 2015-07-22 无锡市华尔泰机械制造有限公司 C276 Hastelloy alloy flange and production technology thereof
CN105154785A (en) * 2015-07-16 2015-12-16 江苏永昊高强度螺栓有限公司 High-strength bolt and manufacturing method thereof

Patent Citations (7)

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Publication number Priority date Publication date Assignee Title
JP2005226150A (en) * 2004-02-16 2005-08-25 Daido Steel Co Ltd Annealing method of tool steel, production method of annealed material for tool steel, annealed material for tool steel, tool steel using the same and tool
CN1831181A (en) * 2005-03-10 2006-09-13 日立金属株式会社 Stainless steel having a high hardness and excellent mirror-finished surface property, and method of producing the same
CN101259582A (en) * 2008-04-28 2008-09-10 江阴市界达特异制管有限公司 Preparation of seamless special-shaped steel pipe for low temperature resistance oil derrick electric transmission pole tower
CN103014551A (en) * 2011-09-22 2013-04-03 兴化市新迅达不锈钢标准件有限公司 Novel high-temperature alloy heat-resistant stainless steel bolt and production process thereof
CN104480477A (en) * 2014-11-20 2015-04-01 海盐汇联通用配件有限公司 Production process of corrosion-resistant high-strength hexagon bolts
CN104791564A (en) * 2015-03-31 2015-07-22 无锡市华尔泰机械制造有限公司 C276 Hastelloy alloy flange and production technology thereof
CN105154785A (en) * 2015-07-16 2015-12-16 江苏永昊高强度螺栓有限公司 High-strength bolt and manufacturing method thereof

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110421318A (en) * 2019-07-24 2019-11-08 王丽 A kind of aero titanium alloy high locked bolts processing technology
CN111876677A (en) * 2020-07-14 2020-11-03 昆山正通铭金属有限公司 Forming process of hexagonal alloy tool steel S2

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Application publication date: 20171226