CN103205642A - Preparation method for wear-resistant check bolt - Google Patents

Preparation method for wear-resistant check bolt Download PDF

Info

Publication number
CN103205642A
CN103205642A CN2013100421519A CN201310042151A CN103205642A CN 103205642 A CN103205642 A CN 103205642A CN 2013100421519 A CN2013100421519 A CN 2013100421519A CN 201310042151 A CN201310042151 A CN 201310042151A CN 103205642 A CN103205642 A CN 103205642A
Authority
CN
China
Prior art keywords
bolt
water
parts
temperature
treatment
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
CN2013100421519A
Other languages
Chinese (zh)
Inventor
赵光明
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.)
FANCHANG COUNTY QILIN CASTING Co Ltd
Original Assignee
FANCHANG COUNTY QILIN CASTING 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 FANCHANG COUNTY QILIN CASTING Co Ltd filed Critical FANCHANG COUNTY QILIN CASTING Co Ltd
Priority to CN2013100421519A priority Critical patent/CN103205642A/en
Publication of CN103205642A publication Critical patent/CN103205642A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

Abstract

The invention discloses a preparation method for a wear-resistant check bolt. Processing steps comprise a step of casting of a rod material, wherein chemical components of a rod material blank comprise, by weight, 0.28 to 0.32% of C, 0.25 to 0.35% of Mn, 0.05 to 0.15% of V, 0.15 to 0.35% of Si, 0.01 to 0.04% of W, no more than 0.025% of P, no more than 0.035% of S, 0.55 to 0.80% of Ni, 0.20 to 0.30% of Sn and 0.22 to 0.32% of Cu, with the balance being Fe. According to the invention, a cold extruding process is used for processing of the bolt, so strength of the bolt is improved, a hardness number and a strength value required by a 12.9 high-strength bolt are reached, the problems of delayed fracture and fatigue fracture of the bolt under high stress are overcome, and the bolt has reliable connection and hardly breaks during usage, has a prolonged service life and meets usage demands for high strength bolts by a variety of industries in society.

Description

The preparation method of wear-resistant lock bolt
Technical field
The present invention relates to the working method of bolt, especially a kind of preparation method of wear-resistant lock bolt.
Background technology
Lock bolt is fastening piece commonly used in the mechanical industry, and present processing mode is generally the moulding of turning, and intensity often is difficult to guarantee, dangerous phenomenons such as generation is in use sometimes turned around, the fracture of bar portion are very big to industrial production harm.Therefore the high strength bolt production method is studied and improved, guaranteed the quality stability of high strength bolt, technology and expanding economy are had vital role.In addition, when bolt was in the moist relatively environment, the corrosion that gets rusty easily finally caused fracture or crackle, forms potential accident source.
Given this, be necessary to provide a kind of wire bolt preparation method, produce more corrosion-resistant, more anti abrasive high strength bolt.
Summary of the invention
The objective of the invention is to avoid weak point of the prior art, and a kind of preparation method of wear-resistant lock bolt is provided.
Purpose of the present invention is as follows by the following technical programs:
The preparation method of wear-resistant lock bolt, procedure of processing comprises:
A, casting bar material, by weight, be fused into molten steel in the steel scrap input middle frequency furnace with 12-14 part earlier, add carburelant again, when treating that the interior temperature of middle frequency furnace rises to 1120～1220 ℃, drop into the steel ingot of 30-35 part again, the foundry returns of the scrap iron of 30-35 part and 12-15 part, deslagging then, add ferromanganese behind the deslagging, alloys such as ferrosilicon, when treating to come out of the stove when the interior temperature of middle frequency furnace rises to 1450 ℃, pour into a mould, the weight percent of each chemical ingredients of control lever material blank should satisfy following requirement: C 0.28～0.32, Mn 0.25～0.35, V 0.05-0.15, Si 0.15～0.35, W 0.01-0.04, P≤0.025, S≤0.035, Ni 0.55～0.80, Sn 0.20～0.30, Cu 0.22～0.32, and surplus is iron;
B, the bar material behind the casting is carried out forging and molding processing, line footpath design requirements according to bolt, forge temperature and be controlled to be 750-800 ℃, cover thin layer flyash at the impression inwall that forges mould, forge number of times no more than 20 times, utilize precision lathe turning to go out the outside screw of bolt after forging moulding, cutter on the lathe is Sintox, the workpiece velocity of rotation guarantees at 3350-3550r.P.M, and begins feed by the relative end of disc head portions, cutting fluid employing water-base cutting fluid;
C, thermal treatment
Bolt outside screw after the precision lathe turning is heated to 740 ℃ ± 10 ℃ with 60 ℃/min intensification, be incubated 1-2 hour, carry out quench cooled with quenching oil again, the bolt after will quenching again heats up to be heated to 20 ℃/min again and carries out temper under 500 ℃, continues insulation 50-70 minute; The polished rod section of bolt is heated up under 800 ± 20 ℃ of the heating with 50 ℃/min, be incubated 1-2 hour, the use hardening liquid carries out quench cooled again, and the bolt after will quenching again heats up to be heated to 20 ℃/min again and carries out temper under 550 ℃, continues insulation 60-70 minute; Carry out carburizing treatment at last, carburizing agent is sent in the tempering stove, carburizing treatment 80～120min in 1100～1150 ℃ of temperature ranges, described carburizing agent are with aluminium sesquioxide fine powder 35～50Wt%, granular graphite 15～30Wt% and carbonate or/and supercarbonate 35～50Wt% obtains after mixing;
D, bonderizing at first carry out skimming treatment with the washing of 14% sodium hydroxide solution, and temperature is controlled between 55-60 ℃, and the time is 5-6 minute, then washing; Use 18%KHSO again 4Solution washing carries out cleanup acid treatment, and temperature is controlled at 18-20 ℃, and the time is 1-2 minute, then washing; At last under 40 ℃ of situations of temperature, the concentration that adopts volume ratio to be respectively 1-2:2-3:1:3-5:50-60 is in the surfactant soln of 36% HCl solution, diethanolamine, SODIUMNITRATE, hydrogen peroxide and water preparation, temperature control is at 45-57 ℃, the immersion time is 3 minutes, cleans up afterwards;
E, Passivation Treatment, it is to handle 4-5min in 100-120 ℃ the inactivating treatment liquid that bolt behind the bonderizing is immersed temperature, described inactivating treatment liquid is to be prepared from by following materials by weight: 4～6 parts of water-soluble molybdates, 8～12 parts of water-soluble manganese salts, 70～100 parts of alkaline silica sols, 80～100 parts of water soluble acrylic resins, 80-100 part water;
F, chromising handle, and the bolt after the Passivation Treatment is put into the wetting ferrochrome powder of hydrochloric acid soln heat, and are heated to 700-900 ℃, keep 60-70min, clean, air-dry again, and bolt gets product.
Described Passivation Treatment, it is to handle 4.5min in 110 ℃ the inactivating treatment liquid that bolt after the thermal treatment is immersed temperature, inactivating treatment liquid is to be prepared from by following materials by weight: 5 parts of water-soluble molybdates, 10 parts of water-soluble manganese salts, 85 parts of alkaline silica sols, 90 parts of water soluble acrylic resins, 90 parts of water.
The preparation method of wear-resistant lock bolt of the present invention, adopt the processing of cold-extrusion technology bolt, improved the intensity of bolt, reached required hardness value, the intensity level of high strength bolt, solved delayed fracture and the repeated stress failure of bolt under the high strength, in use connected reliably, not frangibility, improve bolt life, satisfied the social every profession and trade that goes up to the user demand of high strength bolt.
Beneficial effect of the present invention is:
1, refinement of the present invention the shaping complete processing of material, make wire rod hardness moderate, the surface has good phosphatization epithelium, lubricity is good, wire rod does not have hydrogen embrittlement, plasticity-is good;
2, bolt of the present invention has carried out repeatedly cold-heading extrusion molding, has improved the high strength bolt bulk strength, bolt precision height, and quality is good, and the production efficiency height does not have the no waste material of cutting, and unit cost descends greatly.Obtain the bolt that bulk metal flows to the direction unanimity, improved its tensile strength greatly;
3, the invention of thermal treatment process has broken through the limit of the alloy steel products of bolt prior heat treatment, the leading domestic Investment in fastener industry level of the characteristic of its super-strong and super-toughened property.
Embodiment
With the following Examples the present invention is further described:
The preparation method of wear-resistant lock bolt, procedure of processing comprises:
A, casting bar material, by weight, be fused into molten steel in the steel scrap input middle frequency furnace with 12-14 part earlier, add carburelant again, when treating that the interior temperature of middle frequency furnace rises to 1120～1220 ℃, drop into the steel ingot of 30-35 part again, the foundry returns of the scrap iron of 30-35 part and 12-15 part, deslagging then, add ferromanganese behind the deslagging, alloys such as ferrosilicon, when treating to come out of the stove when the interior temperature of middle frequency furnace rises to 1450 ℃, pour into a mould, the weight percent of each chemical ingredients of control lever material blank should satisfy following requirement: C 0.28～0.32, Mn 0.25～0.35, V 0.05-0.15, Si 0.15～0.35, W 0.01-0.04, P≤0.025, S≤0.035, Ni 0.55～0.80, Sn 0.20～0.30, Cu 0.22～0.32, and surplus is iron;
B, the bar material behind the casting is carried out forging and molding processing, line footpath design requirements according to bolt, forge temperature and be controlled to be 750-800 ℃, cover thin layer flyash at the impression inwall that forges mould, forge number of times no more than 20 times, utilize precision lathe turning to go out the outside screw of bolt after forging moulding, cutter on the lathe is Sintox, the workpiece velocity of rotation guarantees at 3350-3550r.P.M, and begins feed by the relative end of disc head portions, cutting fluid employing water-base cutting fluid;
C, thermal treatment
Bolt outside screw after the precision lathe turning is heated to 740 ℃ ± 10 ℃ with 60 ℃/min intensification, be incubated 1-2 hour, carry out quench cooled with quenching oil again, the bolt after will quenching again heats up to be heated to 20 ℃/min again and carries out temper under 500 ℃, continues insulation 50-70 minute; The polished rod section of bolt is heated up under 800 ± 20 ℃ of the heating with 50 ℃/min, be incubated 1-2 hour, the use hardening liquid carries out quench cooled again, and the bolt after will quenching again heats up to be heated to 20 ℃/min again and carries out temper under 550 ℃, continues insulation 60-70 minute; Carry out carburizing treatment at last, carburizing agent is sent in the tempering stove, carburizing treatment 80～120min in 1100～1150 ℃ of temperature ranges, described carburizing agent are with aluminium sesquioxide fine powder 35～50Wt%, granular graphite 15～30Wt% and carbonate or/and supercarbonate 35～50Wt% obtains after mixing;
D, bonderizing at first carry out skimming treatment with the washing of 14% sodium hydroxide solution, and temperature is controlled between 55-60 ℃, and the time is 5-6 minute, then washing; Use 18%KHSO again 4Solution washing carries out cleanup acid treatment, and temperature is controlled at 18-20 ℃, and the time is 1-2 minute, then washing; At last under 40 ℃ of situations of temperature, the concentration that adopts volume ratio to be respectively 1-2:2-3:1:3-5:50-60 is in the surfactant soln of 36% HCl solution, diethanolamine, SODIUMNITRATE, hydrogen peroxide and water preparation, temperature control is at 45-57 ℃, the immersion time is 3 minutes, cleans up afterwards;
E, Passivation Treatment, it is to handle 4-5min in 100-120 ℃ the inactivating treatment liquid that bolt behind the bonderizing is immersed temperature, described inactivating treatment liquid is to be mixed with by following materials by weight to form: 4～6 parts of water-soluble molybdates, 8～12 parts of water-soluble manganese salts, 70～100 parts of alkaline silica sols, 80～100 parts of water soluble acrylic resins, 80-100 part water;
F, chromising handle, and the bolt after the Passivation Treatment is put into the wetting ferrochrome powder of hydrochloric acid soln heat, and are heated to 700-900 ℃, keep 60-70min, clean, air-dry again, and bolt gets product.
Described Passivation Treatment, it is to handle 4.5min in 110 ℃ the inactivating treatment liquid that bolt after the thermal treatment is immersed temperature, inactivating treatment liquid is to be prepared from by following materials by weight: 5 parts of water-soluble molybdates, 10 parts of water-soluble manganese salts, 85 parts of alkaline silica sols, 90 parts of water soluble acrylic resins, 90 parts of water.
The bolt of producing according to the preparation method of wear-resistant lock bolt of the present invention, as follows through detecting its mechanical property numerical value of test, the bolt centre hardness reaches 42-45HRC, tensile strength reaches 1210Mpa, yield strength reaches 1250Mpa, unit elongation is greater than 12%, relative reduction in area is greater than 35%, and impelling strength is greater than 55J/cm 2, the high 10-12% of bolt that comprehensive mechanical performance produces than existing technology.
Should be noted that at last; above embodiment only is used for explanation technical scheme of the present invention but not limiting the scope of the invention; although with reference to preferred embodiment the present invention has been done detailed description; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement technical scheme of the present invention, and not break away from essence and the scope of technical solution of the present invention.

Claims (2)

1. the preparation method of wear-resistant lock bolt is characterized in that, procedure of processing comprises:
A, casting bar material, by weight, be fused into molten steel in the steel scrap input middle frequency furnace with 12-14 part earlier, add carburelant again, when treating that the interior temperature of middle frequency furnace rises to 1120～1220 ℃, drop into the steel ingot of 30-35 part again, the foundry returns of the scrap iron of 30-35 part and 12-15 part, deslagging then, add ferromanganese behind the deslagging, alloys such as ferrosilicon, when treating to come out of the stove when the interior temperature of middle frequency furnace rises to 1450 ℃, pour into a mould, the weight percent of each chemical ingredients of control lever material blank should satisfy following requirement: C 0.28～0.32, Mn 0.25～0.35, V 0.05-0.15, Si 0.15～0.35, W 0.01-0.04, P≤0.025, S≤0.035, Ni 0.55～0.80, Sn 0.20～0.30, Cu 0.22～0.32, and surplus is iron;
B, the bar material behind the casting is carried out forging and molding processing, line footpath design requirements according to bolt, forge temperature and be controlled to be 750-800 ℃, cover thin layer flyash at the impression inwall that forges mould, forge number of times no more than 20 times, utilize precision lathe turning to go out the outside screw of bolt after forging moulding, cutter on the lathe is Sintox, the workpiece velocity of rotation guarantees at 3350-3550r.P.M, and begins feed by the relative end of disc head portions, cutting fluid employing water-base cutting fluid;
C, thermal treatment
Bolt outside screw after the precision lathe turning is heated to 740 ℃ ± 10 ℃ with 60 ℃/min intensification, be incubated 1-2 hour, carry out quench cooled with quenching oil again, the bolt after will quenching again heats up to be heated to 20 ℃/min again and carries out temper under 500 ℃, continues insulation 50-70 minute; The polished rod section of bolt is heated up under 800 ± 20 ℃ of the heating with 50 ℃/min, be incubated 1-2 hour, the use hardening liquid carries out quench cooled again, and the bolt after will quenching again heats up to be heated to 20 ℃/min again and carries out temper under 550 ℃, continues insulation 60-70 minute; Carry out carburizing treatment at last, carburizing agent is sent in the tempering stove, carburizing treatment 80～120min in 1100～1150 ℃ of temperature ranges, described carburizing agent are with aluminium sesquioxide fine powder 35～50Wt%, granular graphite 15～30Wt% and carbonate or/and supercarbonate 35～50Wt% obtains after mixing;
D, bonderizing at first carry out skimming treatment with the washing of 14% sodium hydroxide solution, and temperature is controlled between 55-60 ℃, and the time is 5-6 minute, then washing; Use 18%KHSO again 4Solution washing carries out cleanup acid treatment, and temperature is controlled at 18-20 ℃, and the time is 1-2 minute, then washing; At last under 40 ℃ of situations of temperature, the concentration that adopts volume ratio to be respectively 1-2:2-3:1:3-5:50-60 is in the surfactant soln of 36% HCl solution, diethanolamine, SODIUMNITRATE, hydrogen peroxide and water preparation, temperature control is at 45-57 ℃, the immersion time is 3 minutes, cleans up afterwards;
E, Passivation Treatment, it is to handle 4-5min in 100-120 ℃ the inactivating treatment liquid that bolt behind the bonderizing is immersed temperature, described inactivating treatment liquid is to be prepared from by following materials by weight: 4～6 parts of water-soluble molybdates, 8～12 parts of water-soluble manganese salts, 70～100 parts of alkaline silica sols, 80～100 parts of water soluble acrylic resins, 80-100 part water;
F, chromising handle, and the bolt after the Passivation Treatment is put into the wetting ferrochrome powder of hydrochloric acid soln heat, and are heated to 700-900 ℃, keep 60-70min, clean, air-dry again, and bolt gets product.
2. the preparation method of wear-resistant lock bolt according to claim 1, it is characterized in that: described Passivation Treatment, it is to handle 4.5min in 110 ℃ the inactivating treatment liquid that bolt after the thermal treatment is immersed temperature, inactivating treatment liquid is to be prepared from by following materials by weight: 5 parts of water-soluble molybdates, 10 parts of water-soluble manganese salts, 85 parts of alkaline silica sols, 90 parts of water soluble acrylic resins, 90 parts of water.
CN2013100421519A 2013-02-04 2013-02-04 Preparation method for wear-resistant check bolt Pending CN103205642A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013100421519A CN103205642A (en) 2013-02-04 2013-02-04 Preparation method for wear-resistant check bolt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013100421519A CN103205642A (en) 2013-02-04 2013-02-04 Preparation method for wear-resistant check bolt

Publications (1)

Publication Number Publication Date
CN103205642A true CN103205642A (en) 2013-07-17

Family

ID=48753045

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2013100421519A Pending CN103205642A (en) 2013-02-04 2013-02-04 Preparation method for wear-resistant check bolt

Country Status (1)

Country Link
CN (1) CN103205642A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104400359A (en) * 2014-11-28 2015-03-11 杨帆 Method for preparing foundation bolts
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
CN108515137A (en) * 2018-03-27 2018-09-11 宁波世裕五金电器有限公司 A kind of manufacturing method of cold forging high-strength stainless steel setscrew
CN108730303A (en) * 2018-06-12 2018-11-02 绵竹市科迪机械加工有限公司 Bolt with corrosion resistance
CN109023011A (en) * 2018-07-27 2018-12-18 含山县林宏铸造厂 A kind of stainless steel metal plate resistant to high temperature
CN109531064A (en) * 2018-11-27 2019-03-29 重庆旺达汽车零部件有限公司 A kind of bolt processing method
CN110438398A (en) * 2019-08-21 2019-11-12 洛阳双瑞特种装备有限公司 A kind of marine environment high-intensity fasteners steel

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104400359A (en) * 2014-11-28 2015-03-11 杨帆 Method for preparing foundation bolts
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
CN108515137A (en) * 2018-03-27 2018-09-11 宁波世裕五金电器有限公司 A kind of manufacturing method of cold forging high-strength stainless steel setscrew
CN108730303A (en) * 2018-06-12 2018-11-02 绵竹市科迪机械加工有限公司 Bolt with corrosion resistance
CN109023011A (en) * 2018-07-27 2018-12-18 含山县林宏铸造厂 A kind of stainless steel metal plate resistant to high temperature
CN109531064A (en) * 2018-11-27 2019-03-29 重庆旺达汽车零部件有限公司 A kind of bolt processing method
CN110438398A (en) * 2019-08-21 2019-11-12 洛阳双瑞特种装备有限公司 A kind of marine environment high-intensity fasteners steel

Similar Documents

Publication Publication Date Title
CN103205642A (en) Preparation method for wear-resistant check bolt
CN103128506B (en) The anti-preparation method of foot bolt yieldly
CN103205641A (en) Preparation method for high-strength foundation bolt
CN103088268B (en) The preparation method of fastening bolt used for automobile wheels
CN103131948A (en) Preparation method of high-strength T-shaped bolt
CN103128505B (en) The preparation method of high-strength steel cable bolt
CN103089781B (en) Method for machining high-strength double end bolt
CN104400359A (en) Method for preparing foundation bolts
CN103088266A (en) Forging method for foundation bolt
CN103084532A (en) Method for machining T-shaped bolt
CN104630605A (en) Composite ceramic steel-based material taking SiC and Al2O3 as basic components and preparation method of composite ceramic steel-based material
CN103084798B (en) high-strength bolt forging method
CN103131949A (en) Preparation method of high-strength aluminum alloy flange bolt
CN103131954A (en) Preparation method of fracture-resistant steel rope bolt
CN103088267B (en) The preparation method of Lengthened bolt
CN103133481B (en) The preparation method of abrasion-resistant foundation bolt
CN103028685B (en) The processing method of high-grade bolt
CN103084523B (en) High intensity U bolt processing method
CN102974771A (en) Casting forming preparation method of pressure reducing valve body
CN103084797B (en) Crawler of excavator bolt forging method
CN103133485B (en) The preparation method of wear-resistant U bolt
CN103084524B (en) Flange bolt forging method
CN103084533B (en) Method for forging torsional shear type high-strength bolt
CN102994861B (en) A kind of castmethod of spherical check valve rod
CN103203593B (en) The preparation method of high strength excavator bolt

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20130717