CN103128505B - The preparation method of high-strength steel cable bolt - Google Patents
The preparation method of high-strength steel cable bolt Download PDFInfo
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- CN103128505B CN103128505B CN201310042135.XA CN201310042135A CN103128505B CN 103128505 B CN103128505 B CN 103128505B CN 201310042135 A CN201310042135 A CN 201310042135A CN 103128505 B CN103128505 B CN 103128505B
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Abstract
The invention discloses a kind of preparation method of high-strength steel cable bolt, procedure of processing comprises: a, casting bar material, by weight, first the steel scrap of 10-14 part is dropped in middle frequency furnace and be fused into molten steel, add again and add carbon agent, when temperature in middle frequency furnace rises to 1120 ~ 1220 DEG C, drop into the steel ingot of 30-35 part, the pig iron of 30-35 part and the foundry returns of 12-16 part again, then deslagging, when coming out of the stove when the temperature in middle frequency furnace rises to 1450 DEG C, the copper of 0.4-0.6 part is added ladle with molten iron, pours into a mould; The preparation method of high-strength steel cable bolt of the present invention, adopt the processing of cold-extrusion technology bolt, improve the intensity of bolt, reach the hardness number needed for 12.9 high-strength bolts, intensity level, solve delayed fracture and the fatigue fracture of bolt under high strength, in use connect reliable, not frangibility, improve bolt life, meet the upper every profession and trade of society to the user demand of high-strength bolt.
Description
Technical field
The present invention relates to the processing method of bolt, especially a kind of preparation method of high-strength steel cable bolt.
Background technology
Wire bolt is securing member conventional in machinery industry, and current processing mode is generally the shaping of turning, and intensity is often difficult to ensure, the dangerous phenomenons such as in use generation is sometimes turned around, the fracture of bar portion, very large to industrial production harm.Therefore high-strength bolt production method is studied and improved, guaranteed the quality stability of high-strength bolt, to technology and expanding economy, be there is important function.In addition, when bolt is in the environment of relative humidity, get rusty easily corrosion, finally causes fracture or crackle, form 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 object of the invention is to avoid weak point of the prior art, and a kind of preparation method of high-strength steel cable bolt is provided.
Object of the present invention is as follows by the following technical programs:
The preparation method of high-strength steel cable bolt, procedure of processing comprises:
A, casting bar material, by weight, first the steel scrap of 10-14 part is dropped in middle frequency furnace and be fused into molten steel, add again and add carbon agent, when temperature in middle frequency furnace rises to 1120 ~ 1220 DEG C, drop into the steel ingot of 30-35 part again, the pig iron of 30-35 part and the foundry returns of 12-16 part, fusing, then deslagging, ferromanganese is added after deslagging, the alloys such as ferrosilicon, when coming out of the stove when the temperature in middle frequency furnace rises to 1450 DEG C, pour into a mould, the percentage by weight of each chemical composition of control lever material blank should meet following requirement: C0.28 ~ 0.35, Mn0.25 ~ 0.35, V0.05-0.15, Si0.25 ~ 0.35, W0.01-0.04, P≤0.025, S≤0.035, Ni0.45 ~ 0.60, Sn0.20 ~ 0.30, Cu0.25 ~ 0.35, surplus is iron,
B, bar material after casting do pickling processes; According to the wire diameter requirement of bolt, line is taken out to it, be retracted to wire diameter needed for bolt to make described bar material; Being cut to length needed for bolt by shrinking the bar material after wire diameter, at normal temperatures the bar material after cutting off being put into the mold cavity being coated with plant ash, make bar material form head needed for bolt and bar portion size with upset force; Utilize the outer peripheral face turning of fine turning lathe in bar material bar portion to form screw thread, the cutter on lathe is Sintox, and workpiece velocity of rotation ensures at 3350-3550r.P.M, and feed by one end that disc head portions is relative, cutting fluid adopts water-base cutting fluid;
C, heat treatment
By bolt external screw thread shaping for fine turning lathe turning at 740 DEG C ± 10 DEG C, quench with quenching oil, again the bolt after quenching is carried out tempering at 500 DEG C, duration 80-100 minute, by the polished rod section of bolt at 800 DEG C ± 20 DEG C, use quenching liquid quenches, again the bolt after quenching is carried out tempering at 550 DEG C, duration 60-70 minute, finally carry out Carburization Treatment, carburizer is sent in tempering furnace, Carburization Treatment 80 ~ 120min in 1100 ~ 1150 DEG C of temperature ranges, described carburizer is by fine silica 35 ~ 50Wt%, granular graphite 15 ~ 30Wt% and carbonate are or/and bicarbonate 35 ~ 50Wt% obtains after being uniformly mixed,
D, Passivation Treatment, it is process 4-5min in the inactivating treatment liquid of 100-120 DEG C that bolt after heat treatment is immersed temperature, described inactivating treatment liquid is mixed with by the material of following weight proportioning to form: 4 ~ 6 parts of water-soluble molybdenum hydrochlorates, 8 ~ 12 parts of diethanol amine, 70 ~ 100 parts of alkaline silica sols, 80 ~ 100 parts of water soluble acrylic resins, 80-100 part water;
E, chromising process, the ferrochrome powder bolt after Passivation Treatment being put into hydrochloric acid solution wetting heats, and is heated to 700-900 DEG C, keeps 60-70min, then carry out cleaning, air-dry, get product bolt.
Described Passivation Treatment, it is process 4.5min in the inactivating treatment liquid of 110 DEG C that bolt after heat treatment is immersed temperature, inactivating treatment liquid is prepared from by the material of following weight proportioning: 5 parts of water-soluble molybdenum hydrochlorates, 10 parts of diethanol amine, 85 parts of alkaline silica sols, 90 parts of water soluble acrylic resins, 90 parts of water.
The preparation method of high-strength steel cable bolt of the present invention, adopt the processing of cold-extrusion technology bolt, improve the intensity of bolt, reach the hardness number needed for high-strength bolt, intensity level, solve delayed fracture and the fatigue fracture of bolt under high strength, in use connect reliable, not frangibility, improve bolt life, meet the upper every profession and trade of society to the user demand of high-strength bolt.
Beneficial effect of the present invention is:
1, the refinement of the present invention shaping processing technology of material, make wire rod hardness moderate, surface has good phosphatization epithelium, and greasy property is good, wire rod is without hydrogen embrittlement, and plasticity is good;
2, bolt of the present invention has carried out that repeatedly cold-heading is extruded, and improve high-strength bolt bulk strength, bolt precision is high, and quality is good, and production efficiency is high, and without cutting no waste mine, unit cost declines greatly.Obtain bulk metal and flow to the consistent bolt in direction, substantially increase its tensile strength;
3, the invention of Technology for Heating Processing breaches the limit of the alloy steel products of bolt prior heat treatment, the leading domestic Investment in fastener industry level of characteristic of its super-strong and super-toughened property.
Detailed description of the invention
The invention will be further described with the following Examples:
The preparation method of high-strength steel cable bolt, procedure of processing comprises:
A, casting bar material, by weight, first the steel scrap of 10-14 part is dropped in middle frequency furnace and be fused into molten steel, add again and add carbon agent, when temperature in middle frequency furnace rises to 1120 ~ 1220 DEG C, drop into the steel ingot of 30-35 part again, the pig iron of 30-35 part and the foundry returns of 12-16 part, fusing, then deslagging, ferromanganese is added after deslagging, the alloys such as ferrosilicon, when coming out of the stove when the temperature in middle frequency furnace rises to 1450 DEG C, pour into a mould, the percentage by weight of each chemical composition of control lever material blank should meet following requirement: C0.28 ~ 0.35, Mn0.25 ~ 0.35, V0.05-0.15, Si0.25 ~ 0.35, W0.01-0.04, P≤0.025, S≤0.035, Ni0.45 ~ 0.60, Sn0.20 ~ 0.30, Cu0.25 ~ 0.35, surplus is iron,
B, bar material after casting do pickling processes; According to the wire diameter requirement of bolt, line is taken out to it, be retracted to wire diameter needed for bolt to make described bar material; Being cut to length needed for bolt by shrinking the bar material after wire diameter, at normal temperatures the bar material after cutting off being put into the mold cavity being coated with plant ash, make bar material form head needed for bolt and bar portion size with upset force; Utilize the outer peripheral face turning of fine turning lathe in bar material bar portion to form screw thread, the cutter on lathe is Sintox, and workpiece velocity of rotation ensures at 3350-3550r.P.M, and feed by one end that disc head portions is relative, cutting fluid adopts water-base cutting fluid;
C, heat treatment
By bolt external screw thread shaping for fine turning lathe turning at 740 DEG C ± 10 DEG C, quench with quenching oil, again the bolt after quenching is carried out tempering at 500 DEG C, duration 80-100 minute, by the polished rod section of bolt at 800 DEG C ± 20 DEG C, use quenching liquid quenches, again the bolt after quenching is carried out tempering at 550 DEG C, duration 60-70 minute, finally carry out Carburization Treatment, carburizer is sent in tempering furnace, Carburization Treatment 80 ~ 120min in 1100 ~ 1150 DEG C of temperature ranges, described carburizer is by fine silica 35 ~ 50Wt%, granular graphite 15 ~ 30Wt% and carbonate are or/and bicarbonate 35 ~ 50Wt% obtains after being uniformly mixed,
D, Passivation Treatment, it is process 4.5min in the inactivating treatment liquid of 110 DEG C that bolt after heat treatment is immersed temperature, inactivating treatment liquid is mixed with by the material of following weight proportioning to form: 5 parts of water-soluble molybdenum hydrochlorates, 10 parts of diethanol amine, 85 parts of alkaline silica sols, 90 parts of water soluble acrylic resins, 90 parts of water;
E, chromising process, the ferrochrome powder bolt after Passivation Treatment being put into 20% hydrochloric acid solution wetting heats, and is heated to 700-900 DEG C, keeps 60-70min, then carry out cleaning, air-dry, get product bolt.
According to the bolt that the preparation method of high-strength steel cable bolt of the present invention produces, as follows through its mechanical performance numerical value of detection experiment, bolt centre hardness reaches 42-45HRC, tensile strength reaches 1220Mpa, yield strength reaches 1250Mpa, percentage elongation is greater than 10%, the contraction percentage of area is greater than 32%, and impact flexibility is greater than 60J/cm
2, the bolt height 10-12% that comprehensive mechanical performance goes out than existing manufacture technics.
Finally should be noted that; above embodiment is only for illustration of technical scheme of the present invention but not limiting the scope of the invention; although be explained in detail the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (2)
1. the preparation method of high-strength steel cable bolt, is characterized in that, procedure of processing comprises:
A, casting bar material, by weight, first the steel scrap of 10-14 part is dropped in middle frequency furnace and be fused into molten steel, add again and add carbon agent, when temperature in middle frequency furnace rises to 1120 ~ 1220 DEG C, drop into the steel ingot of 30-35 part again, the pig iron of 30-35 part and the foundry returns of 12-16 part, fusing, then deslagging, ferromanganese is added after deslagging, Antaciron, when coming out of the stove when the temperature in middle frequency furnace rises to 1450 DEG C, pour into a mould, the percentage by weight of each chemical composition of control lever material blank should meet following requirement: C0.28 ~ 0.35, Mn0.25 ~ 0.35, V0.05-0.15, Si0.25 ~ 0.35, W0.01-0.04, P≤0.025, S≤0.035, Ni0.45 ~ 0.60, Sn0.20 ~ 0.30, Cu0.25 ~ 0.35, surplus is iron,
B, bar material after casting do pickling processes; According to the wire diameter requirement of bolt, line is taken out to it, be retracted to wire diameter needed for bolt to make described bar material; Being cut to length needed for bolt by shrinking the bar material after wire diameter, at normal temperatures the bar material after cutting off being put into the mold cavity being coated with plant ash, make bar material form head needed for bolt and bar portion size with upset force; Utilize the outer peripheral face turning of fine turning lathe in bar material bar portion to form screw thread, the cutter on lathe is Sintox, and workpiece velocity of rotation ensures at 3350-3550r.P.M, and feed by one end that disc head portions is relative, cutting fluid adopts water-base cutting fluid;
C, heat treatment
By bolt external screw thread shaping for fine turning lathe turning at 740 DEG C ± 10 DEG C, quench with quenching oil, again the bolt after quenching is carried out tempering at 500 DEG C, duration 80-100 minute, by the polished rod section of bolt at 800 DEG C ± 20 DEG C, use quenching liquid quenches, again the bolt after quenching is carried out tempering at 550 DEG C, duration 60-70 minute, finally carry out Carburization Treatment, carburizer is sent in tempering furnace, Carburization Treatment 80 ~ 120min in 1100 ~ 1150 DEG C of temperature ranges, described carburizer is by fine silica 35 ~ 50Wt%, granular graphite 15 ~ 30Wt% and carbonate are or/and bicarbonate 35 ~ 50Wt% obtains after being uniformly mixed,
D, Passivation Treatment, it is process 4-5min in the inactivating treatment liquid of 100-120 DEG C that bolt after heat treatment is immersed temperature, described inactivating treatment liquid is mixed with by the material of following weight proportioning to form: 4 ~ 6 parts of water-soluble molybdenum hydrochlorates, 8 ~ 12 parts of diethanol amine, 70 ~ 100 parts of alkaline silica sols, 80 ~ 100 parts of water soluble acrylic resins, 80-100 part water;
E, chromising process, the ferrochrome powder bolt after Passivation Treatment being put into hydrochloric acid solution wetting heats, and is heated to 700-900 DEG C, keeps 60-70min, then carry out cleaning, air-dry, get product bolt.
2. the preparation method of high-strength steel cable bolt according to claim 1, it is characterized in that: described Passivation Treatment, it is process 4.5min in the inactivating treatment liquid of 110 DEG C that bolt after heat treatment is immersed temperature, inactivating treatment liquid is prepared from by the material of following weight proportioning: 5 parts of water-soluble molybdenum hydrochlorates, 10 parts of diethanol amine, 85 parts of alkaline silica sols, 90 parts of water soluble acrylic resins, 90 parts of water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310042135.XA CN103128505B (en) | 2013-02-04 | 2013-02-04 | The preparation method of high-strength steel cable bolt |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310042135.XA CN103128505B (en) | 2013-02-04 | 2013-02-04 | The preparation method of high-strength steel cable bolt |
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| CN103128505B true CN103128505B (en) | 2016-01-20 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104825219A (en) * | 2015-05-03 | 2015-08-12 | 刘乐 | Bone plate for minimally invasive surgery |
| CN105154785B (en) * | 2015-07-16 | 2017-12-22 | 江苏永昊高强度螺栓有限公司 | High-strength bolt and its manufacture method |
| CN105014320A (en) * | 2015-07-20 | 2015-11-04 | 中山市祥丰瓦斯器材制品有限公司 | Valve body manufacturing method |
| CN106917045B (en) * | 2017-03-07 | 2019-03-05 | 广西大学行健文理学院 | Cast the manufacturing method of cold upsetting die of car |
| CN111001981A (en) * | 2019-11-01 | 2020-04-14 | 江苏振光电力设备制造有限公司 | Preparation method of weather-resistant bolt for iron tower |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4442562A (en) * | 1982-05-07 | 1984-04-17 | Russo Peter J | Method of forming anchor bolts |
| CN101486087A (en) * | 2009-02-11 | 2009-07-22 | 江苏大学 | Casting and forging combined technique of aluminum alloy linkage rod |
| CN101549448A (en) * | 2008-03-31 | 2009-10-07 | 江都狮鹤高强度螺栓有限公司 | Processing technology for high-strength bolt used for steel net frame bolt ball node |
| CN101797685A (en) * | 2010-04-08 | 2010-08-11 | 浙江裕泰紧固件制造有限公司 | Process for manufacturing high-strength bolt |
| CN101890618A (en) * | 2010-06-17 | 2010-11-24 | 鹏驰五金制品有限公司 | Processing method of high-strength bolts |
| CN102152078A (en) * | 2011-03-30 | 2011-08-17 | 浙江迪特高强度螺栓有限公司 | Processing technique for high-strength bolt adopted by bulldozer or excavator pedrail |
-
2013
- 2013-02-04 CN CN201310042135.XA patent/CN103128505B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4442562A (en) * | 1982-05-07 | 1984-04-17 | Russo Peter J | Method of forming anchor bolts |
| CN101549448A (en) * | 2008-03-31 | 2009-10-07 | 江都狮鹤高强度螺栓有限公司 | Processing technology for high-strength bolt used for steel net frame bolt ball node |
| CN101486087A (en) * | 2009-02-11 | 2009-07-22 | 江苏大学 | Casting and forging combined technique of aluminum alloy linkage rod |
| CN101797685A (en) * | 2010-04-08 | 2010-08-11 | 浙江裕泰紧固件制造有限公司 | Process for manufacturing high-strength bolt |
| CN101890618A (en) * | 2010-06-17 | 2010-11-24 | 鹏驰五金制品有限公司 | Processing method of high-strength bolts |
| CN102152078A (en) * | 2011-03-30 | 2011-08-17 | 浙江迪特高强度螺栓有限公司 | Processing technique for high-strength bolt adopted by bulldozer or excavator pedrail |
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Effective date of registration: 20190726 Address after: 226121 Room 6, No. 32 Daqing Road, Sanchang Town, Haimen City, Nantong City, Jiangsu Province Patentee after: Haimen Qinglong Shipping Engineering Co.,Ltd. Address before: 241200 Xindong Village, Xingang Town, Fanchang County, Wuhu City, Anhui Province Patentee before: FANCHANG QIXIN CASTING CO.,LTD. |
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Address after: Room 6, No.32 Daqing Road, Sanchang Town, Haimen City, Nantong City, Jiangsu Province Patentee after: Qinglong Shipping Engineering (Nantong) Co.,Ltd. Address before: Room 6, No.32 Daqing Road, Sanchang Town, Haimen City, Nantong City, Jiangsu Province Patentee before: Haimen Qinglong Shipping Engineering Co.,Ltd. |
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