CN103128505A - Preparation method of high-strength steel cable bolt - Google Patents
Preparation method of high-strength steel cable bolt Download PDFInfo
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- CN103128505A CN103128505A CN201310042135XA CN201310042135A CN103128505A CN 103128505 A CN103128505 A CN 103128505A CN 201310042135X A CN201310042135X A CN 201310042135XA CN 201310042135 A CN201310042135 A CN 201310042135A CN 103128505 A CN103128505 A CN 103128505A
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Abstract
The invention discloses a preparation method of a high-strength steel cable bolt. The method includes the following steps: casting a rod material, throwing 10-14 parts by weight of waste steel into a medium frequency furnace, enabling the steel to be melted into liquid steel, adding a carbon addition agent, throwing 30-35 parts by weight of steel ingot, 30-35 parts by weight of cast iron and 12-16 parts by weight of returns into the medium frequency furnace after temperature in the medium frequency furnace is increased to 1120-1220 DEG C, conducting slagging and adding 0.4-0.6 part by weight of copper and liquid iron into a ladle to conduct pouring when temperature in the medium frequency furnace increases to 1450 DEG C and the iron is discharged. The preparation method of the high-strength steel cable bolt adopts the cold extrusion process to process the bolt, improves bolt strength, achieves the hardness and the strength required by 12.9 high-strength bolt, resolves the problems of delaying breaking and fatigue breaking of the bolt under high strength, prolongs service life of the bolt due to the fact that the bolt is reliable in connection and not easy to break in use, and meets using requirements of social industries for the 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 cable wire bolt.
Background technology
Wire bolt is securing member commonly used in machinery industry, and present processing mode is generally the moulding of turning, and intensity often is difficult to guarantee, sometimes in use produce turn around, the dangerous phenomenon such as bar section fracture, endanger very large to industrial production.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 important function.In addition, when bolt was in relatively moist 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 object of the invention is to avoid weak point of the prior art, and a kind of preparation method of high strength cable wire bolt is provided.
Purpose of the present invention is as follows by the following technical programs:
The preparation method of high strength cable wire bolt, procedure of processing comprises:
a, casting bar material, by weight, first be fused into molten steel in the steel scrap input middle frequency furnace with 10-14 part, add again and add the carbon agent, when the temperature in middle frequency furnace rises to 1120～1220 ℃, drop into again the steel ingot of 30-35 part, the foundry returns of the pig iron of 30-35 part and 12-16 part, fusing, then deslagging, add ferromanganese after deslagging, the alloys such as ferrosilicon, when coming out of the stove when the temperature in middle frequency furnace rises to 1450 ℃, pour into a mould, the percentage by weight of each chemical composition of control lever material blank should satisfy following requirement: C 0.28～0.35, Mn 0.25～0.35, V 0.05-0.15, Si 0.25～0.35, W 0.01-0.04, P≤0.025, S≤0.035, Ni 0.45～0.60, Sn 0.20～0.30, Cu 0.25～0.35, surplus is iron,
Bar material after b, process casting is done pickling processes; According to the wire diameter requirement of bolt, it is taken out line, so that described bar material is retracted to the required wire diameter of bolt; The bar material that shrinks after wire diameter is cut to the required length of bolt, and the bar material after cutting off is at normal temperatures put into the mold cavity that is coated with plant ash, makes the required head of bar material formation bolt and bar section size with upset force; Utilize fine turning lathe at the outer peripheral face turning formation screw thread of bar material bar section, the cutter on lathe is Sintox, and 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, heat treatment
with the bolt external screw thread of fine turning lathe turning moulding under 740 ℃ ± 10 ℃, quench with quenching oil, bolt after quenching again carries out tempering under 500 ℃, duration 80-100 minute, with the polished rod section of bolt under 800 ℃ ± 20 ℃, the use quenching liquid quenches, bolt after quenching again carries out tempering under 550 ℃, duration 60-70 minute, carry out at last Carburization Treatment, carburizer is sent in tempering furnace, Carburization Treatment 80～120min in 1100～1150 ℃ of temperature ranges, described carburizer is with fine silica 35～50Wt%, granular graphite 15～30Wt% and carbonate or/and bicarbonate 35～50Wt% obtain after mixing,
D, Passivation Treatment, it is to process 4-5min in the inactivating treatment liquid of 100-120 ℃ that bolt after heat treatment is immersed temperature, described inactivating treatment liquid is that the material by the following weight proportioning is mixed with and forms: 4～6 parts of water-soluble molybdates, 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, and the bolt after Passivation Treatment is put into the wetting ferrochrome powder of hydrochloric acid solution heat, and are heated to 700-900 ℃, keep 60-70min, then clean, air-dry, bolt gets product.
Described Passivation Treatment, it is to process 4.5min in the inactivating treatment liquid of 110 ℃ that bolt after heat treatment is immersed temperature, inactivating treatment liquid is that the material by the following weight proportioning is prepared from: 5 parts of water-soluble molybdates, 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 cable wire bolt of the present invention, adopt the processing of cold-extrusion technology bolt, improved the intensity of bolt, reached required hardness number, the intensity level of high-strength bolt, solved delayed fracture and the fatigue fracture of bolt under high strength, in use connected reliably, not frangibility, improve bolt life, satisfied social upper every profession and trade to the user demand of high-strength bolt.
Beneficial effect of the present invention is:
1, refinement of the present invention the shaping processing technology of material, make wire rod hardness moderate, the surface has good phosphatization epithelium, greasy property is good, wire rod is without hydrogen embrittlement, plasticity is good;
2, bolt of the present invention has carried out repeatedly cold-heading extrusion modling, has improved the high-strength bolt bulk strength, and the bolt precision is high, and quality is good, and production efficiency is high, and without waste material, unit cost descends greatly without cutting.Obtain bulk metal and flowed to the consistent bolt of direction, greatly improved its tensile strength;
3, the invention of Technology for Heating Processing 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.
The specific embodiment
The invention will be further described with the following Examples:
The preparation method of high strength cable wire bolt, procedure of processing comprises:
a, casting bar material, by weight, first be fused into molten steel in the steel scrap input middle frequency furnace with 10-14 part, add again and add the carbon agent, when the temperature in middle frequency furnace rises to 1120～1220 ℃, drop into again the steel ingot of 30-35 part, the foundry returns of the pig iron of 30-35 part and 12-16 part, fusing, then deslagging, add ferromanganese after deslagging, the alloys such as ferrosilicon, when coming out of the stove when the temperature in middle frequency furnace rises to 1450 ℃, pour into a mould, the percentage by weight of each chemical composition of control lever material blank should satisfy following requirement: C 0.28～0.35, Mn 0.25～0.35, V 0.05-0.15, Si 0.25～0.35, W 0.01-0.04, P≤0.025, S≤0.035, Ni 0.45～0.60, Sn 0.20～0.30, Cu 0.25～0.35, surplus is iron,
Bar material after b, process casting is done pickling processes; According to the wire diameter requirement of bolt, it is taken out line, so that described bar material is retracted to the required wire diameter of bolt; The bar material that shrinks after wire diameter is cut to the required length of bolt, and the bar material after cutting off is at normal temperatures put into the mold cavity that is coated with plant ash, makes the required head of bar material formation bolt and bar section size with upset force; Utilize fine turning lathe at the outer peripheral face turning formation screw thread of bar material bar section, the cutter on lathe is Sintox, and 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, heat treatment
with the bolt external screw thread of fine turning lathe turning moulding under 740 ℃ ± 10 ℃, quench with quenching oil, bolt after quenching again carries out tempering under 500 ℃, duration 80-100 minute, with the polished rod section of bolt under 800 ℃ ± 20 ℃, the use quenching liquid quenches, bolt after quenching again carries out tempering under 550 ℃, duration 60-70 minute, carry out at last Carburization Treatment, carburizer is sent in tempering furnace, Carburization Treatment 80～120min in 1100～1150 ℃ of temperature ranges, described carburizer is with fine silica 35～50Wt%, granular graphite 15～30Wt% and carbonate or/and bicarbonate 35～50Wt% obtain after mixing,
D, Passivation Treatment, it is to process 4.5min in the inactivating treatment liquid of 110 ℃ that bolt after heat treatment is immersed temperature, inactivating treatment liquid is that the material by the following weight proportioning is mixed with and forms: 5 parts of water-soluble molybdates, 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, and the bolt after Passivation Treatment is put into the wetting ferrochrome powder of 20% hydrochloric acid solution heat, and are heated to 700-900 ℃, keep 60-70min, then clean, air-dry, bolt gets product.
The bolt of producing according to the preparation method of high strength cable wire bolt of the present invention, as follows through detecting its mechanical performance numerical value of test, the 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 high 10-12% of bolt that comprehensive mechanical performance produces than existing technique.
Should be noted that at last; above embodiment only is used for technical scheme of the present invention being described 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 modify 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 high strength cable wire bolt, is characterized in that, procedure of processing comprises:
a, casting bar material, by weight, first be fused into molten steel in the steel scrap input middle frequency furnace with 10-14 part, add again and add the carbon agent, when the temperature in middle frequency furnace rises to 1120～1220 ℃, drop into again the steel ingot of 30-35 part, the foundry returns of the pig iron of 30-35 part and 12-16 part, fusing, then deslagging, add ferromanganese after deslagging, the alloys such as ferrosilicon, when coming out of the stove when the temperature in middle frequency furnace rises to 1450 ℃, pour into a mould, the percentage by weight of each chemical composition of control lever material blank should satisfy following requirement: C 0.28～0.35, Mn 0.25～0.35, V 0.05-0.15, Si 0.25～0.35, W 0.01-0.04, P≤0.025, S≤0.035, Ni 0.45～0.60, Sn 0.20～0.30, Cu 0.25～0.35, surplus is iron,
Bar material after b, process casting is done pickling processes; According to the wire diameter requirement of bolt, it is taken out line, so that described bar material is retracted to the required wire diameter of bolt; The bar material that shrinks after wire diameter is cut to the required length of bolt, and the bar material after cutting off is at normal temperatures put into the mold cavity that is coated with plant ash, makes the required head of bar material formation bolt and bar section size with upset force; Utilize fine turning lathe at the outer peripheral face turning formation screw thread of bar material bar section, the cutter on lathe is Sintox, and 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, heat treatment
with the bolt external screw thread of fine turning lathe turning moulding under 740 ℃ ± 10 ℃, quench with quenching oil, bolt after quenching again carries out tempering under 500 ℃, duration 80-100 minute, with the polished rod section of bolt under 800 ℃ ± 20 ℃, the use quenching liquid quenches, bolt after quenching again carries out tempering under 550 ℃, duration 60-70 minute, carry out at last Carburization Treatment, carburizer is sent in tempering furnace, Carburization Treatment 80～120min in 1100～1150 ℃ of temperature ranges, described carburizer is with fine silica 35～50Wt%, granular graphite 15～30Wt% and carbonate or/and bicarbonate 35～50Wt% obtain after mixing,
D, Passivation Treatment, it is to process 4-5min in the inactivating treatment liquid of 100-120 ℃ that bolt after heat treatment is immersed temperature, described inactivating treatment liquid is that the material by the following weight proportioning is mixed with and forms: 4～6 parts of water-soluble molybdates, 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, and the bolt after Passivation Treatment is put into the wetting ferrochrome powder of hydrochloric acid solution heat, and are heated to 700-900 ℃, keep 60-70min, then clean, air-dry, bolt gets product.
2. the preparation method of high strength cable wire bolt according to claim 1, it is characterized in that: described Passivation Treatment, it is to process 4.5min in the inactivating treatment liquid of 110 ℃ that bolt after heat treatment is immersed temperature, inactivating treatment liquid is that the material by the following weight proportioning is prepared from: 5 parts of water-soluble molybdates, 10 parts of diethanol amine, 85 parts of alkaline silica sols, 90 parts of water soluble acrylic resins, 90 parts of water.
Priority Applications (1)
| 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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| CN103128505A true CN103128505A (en) | 2013-06-05 |
| CN103128505B CN103128505B (en) | 2016-01-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104825219A (en) * | 2015-05-03 | 2015-08-12 | 刘乐 | Bone plate for minimally invasive surgery |
| 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 |
| 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 |
| CN106917045A (en) * | 2017-03-07 | 2017-07-04 | 广西大学行健文理学院 | Cast the manufacture 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 |
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| 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 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104825219A (en) * | 2015-05-03 | 2015-08-12 | 刘乐 | Bone plate for minimally invasive surgery |
| 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 |
| 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 |
| CN106917045A (en) * | 2017-03-07 | 2017-07-04 | 广西大学行健文理学院 | Cast the manufacture method of cold upsetting die of car |
| 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 |
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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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Granted publication date: 20160120 Termination date: 20220204 |