CN103088268B - The preparation method of fastening bolt used for automobile wheels - Google Patents

The preparation method of fastening bolt used for automobile wheels Download PDF

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Publication number
CN103088268B
CN103088268B CN201210511900.3A CN201210511900A CN103088268B CN 103088268 B CN103088268 B CN 103088268B CN 201210511900 A CN201210511900 A CN 201210511900A CN 103088268 B CN103088268 B CN 103088268B
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bolt
bar
parts
wire diameter
quenching
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CN103088268A (en
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王立新
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Hubei Youqian Auto Parts Co.,Ltd.
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Hefei Zhonglan New Material Technology Co Ltd
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Abstract

The invention discloses a kind of preparation method of fastening bolt used for automobile wheels, procedure of processing comprises: a, casting bar material, control its chemical composition content percentage as follows: C? 0.27~0.34, Mn? 0.45~0.65, V? 0.05-0.15, Si? 0.15~0.35, W? 0.01-0.04, P≤0.025, S≤0.025, Ni? 1.55~2.00, Cr? 0.65~0.95, Mo? 0.20~0.30, Cu≤0.20; B, bar material after casting do pickling processes; According to the wire diameter requirement of bolt, it is taken out to line, so that described bar material is retracted to the required wire diameter of bolt; The bar material shrinking after wire diameter is cut to the required length of bolt, at normal temperatures the bar material after cutting off is put into mold cavity, make bar material form required head and the bar portion size of bolt with upset force. The preparation method of fastening bolt used for automobile wheels of the present invention, adopt the processing of cold-extrusion technology bolt, improve the intensity of bolt, reach required hardness number, the intensity level of 12.9 high-strength bolts, solve delayed fracture and the fatigue fracture of bolt under high strength, in use connected reliably not frangibility, improve bolt life, met the user demand of social upper every profession and trade to high-strength bolt.

Description

The preparation method of fastening bolt used for automobile wheels
Technical field
The present invention relates to the processing method of bolt, especially a kind of preparation method of fastening bolt used for automobile wheels.
Background technology
Fastening bolt used for automobile wheels is securing member conventional in machinery industry, and current processing mode is generally the moulding 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 are very large to industrial production harm. Therefore high-strength bolt production method is studied and improved, guaranteed the quality stability of high-strength bolt, technology and expanding economy are had to important function. In addition, bolt is in relatively moist environment time, and the corrosion that gets rusty easily, finally causes rupturing or crackle, forms potential accident source.
Given this, be necessary to provide a kind of fastening bolt used for automobile wheels, produce more corrosion resistant 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 fastening bolt used for automobile wheels is provided.
Object of the present invention is as follows by the following technical programs:
The preparation method of fastening bolt used for automobile wheels, procedure of processing comprises:
A, casting bar material, the percentage by weight of each chemical composition of control lever material should meet following requirement: C0.27~0.34, Mn0.45~0.65, V0.05-0.15, Si0.15~0.35, W0.01-0.04, P≤0.025, S≤0.025, Ni1.55~2.00, Cr0.65~0.95, Mo0.20~0.30, Cu≤0.20;
B, bar material after casting do pickling processes; According to the wire diameter requirement of bolt, it is taken out to line, so that described bar material is retracted to the required wire diameter of bolt; The bar material shrinking after wire diameter is cut to the required length of bolt, at normal temperatures the bar material after cutting off is put into mold cavity, make bar material form required head and the bar portion size of bolt with upset force; Utilize fine turning lathe to form screw thread in the outer peripheral face turning of bar material bar portion, the cutter on lathe is Sintox, and the operating rate of lathe tool ensures at 3300-3500r.P.M, and starts feed by the relative one end of disc head portions, cutting fluid employing water-base cutting fluid;
C, heat treatment
Reciprocating tooth roller is rolled over to the bolt external screw thread of making type at 940 DEG C ± 10 DEG C, quench with quenching oil, again the bolt after quenching is carried out to tempering at 500 DEG C, 100 minutes duration, 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 to tempering at 600 DEG C, 60 minutes duration, finally carry out Carburization Treatment, carburizer is sent in tempering furnace, Carburization Treatment 50~120min in 1100 °~1150 DEG C temperature ranges, described carburizer is by 30~50 parts of alundum (Al2O3) fine powders, 10~30 parts of granular graphites and carbonate or/and 30~50 parts of bicarbonates after being uniformly mixed, obtain,
D, phosphatization processing, it is to process 4-5min in the surface phosphorization treatment fluid of 100-120 DEG C that bolt after heat treatment is immersed to temperature, described surface phosphorization treatment fluid is by zinc dihydrogen phosphate: zinc nitrate: sodium carbonate: water forms, and its each composition weight proportioning is respectively: 11~20 parts, 15~30 parts, 5~10 parts, 200~300 parts;
E, blackening process
Bolt is carried out to blackening process, control 100 DEG C-110 DEG C of temperature; Time 25-30 minute; Clean again, air-dry, bolt gets product.
Described phosphatization processing, it is to process 4.5min in the surface phosphorization treatment fluid of 110 DEG C that bolt after heat treatment is immersed to temperature, surface phosphorization treatment fluid is by zinc dihydrogen phosphate: zinc nitrate: sodium carbonate: water forms, its each composition weight proportioning is respectively: 15 parts, 18 parts, 7 parts, 150 parts.
The preparation method of fastening bolt used for automobile wheels of the present invention, adopt the processing of cold-extrusion technology bolt, improve the intensity of bolt, reach required hardness number, the intensity level of 12.9 high-strength bolts, solve delayed fracture and the fatigue fracture of bolt under high strength, in use connected reliably not frangibility, improve bolt life, met the user demand of social upper every profession and trade to 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, 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 3-4 cold-heading extrusion modling, has improved high-strength bolt bulk strength, and bolt precision is high, and quality is good, and production efficiency is high, and without cutting, without waste material, unit cost declines greatly. Obtain bulk metal and flowed to the bolt that direction is consistent, 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.
Detailed description of the invention
The invention will be further described with the following Examples:
The preparation method of fastening bolt used for automobile wheels, procedure of processing comprises:
A, casting bar material, the percentage by weight of each chemical composition of control lever material should meet following requirement: C0.27~0.34, Mn0.45~0.65, V0.05-0.15, Si0.15~0.35, W0.01-0.04, P≤0.025, S≤0.025, Ni1.55~2.00, Cr0.65~0.95, Mo0.20~0.30, Cu≤0.20;
B, bar material after casting do pickling processes; According to the wire diameter requirement of bolt, it is taken out to line, so that described bar material is retracted to the required wire diameter of bolt; The bar material shrinking after wire diameter is cut to the required length of bolt, at normal temperatures the bar material after cutting off is put into mold cavity, make bar material form required head and the bar portion size of bolt with upset force; Utilize fine turning lathe to form screw thread in the outer peripheral face turning of bar material bar portion, the cutter on lathe is Sintox, and the operating rate of lathe tool ensures at 3300-3500r.P.M, and starts feed by the relative one end of disc head portions, cutting fluid employing water-base cutting fluid;
C, heat treatment
Reciprocating tooth roller is rolled over to the bolt external screw thread of making type at 940 DEG C ± 10 DEG C, quench with quenching oil, again the bolt after quenching is carried out to tempering at 500 DEG C, 100 minutes duration, 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 to tempering at 600 DEG C, 60 minutes duration, finally carry out Carburization Treatment, carburizer is sent in tempering furnace, Carburization Treatment 50~120min in 1100 °~1150 DEG C temperature ranges, described carburizer is by 30~50 parts of alundum (Al2O3) fine powders, 10~30 parts of granular graphites and carbonate or/and 30~50 parts of bicarbonates after being uniformly mixed, obtain,
D, phosphatization processing, it is to process 4.5min in the surface phosphorization treatment fluid of 110 DEG C that bolt after heat treatment is immersed to temperature, surface phosphorization treatment fluid is by zinc dihydrogen phosphate: zinc nitrate: sodium carbonate: water forms, and its each composition weight proportioning is respectively: 15 parts, 18 parts, 7 parts, 150 parts;
E, blackening process
Bolt is carried out to blackening process, control 100 DEG C-110 DEG C of temperature; Time 25-30 minute; Clean again, air-dry, bolt gets product.
The bolt of producing according to the preparation method of fastening bolt used for automobile wheels of the present invention, as follows through detecting its mechanical performance numerical value of test, bolt centre hardness reaches 40-43HRC, tensile strength reaches 1230Mpa, yield strength reaches 1250Mpa, percentage elongation is greater than 10%, the contraction percentage of area is greater than 35%, and impact flexibility is greater than 60J/cm2, the high 10-12% of bolt that comprehensive mechanical performance produces than existing technique.
Finally should be noted that; above embodiment is only for illustrating technical scheme of the present invention but not limiting the scope of the invention; although the present invention is explained in detail with reference to preferred embodiment; 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 depart from essence and the scope of technical solution of the present invention.

Claims (1)

1. the preparation method of fastening bolt used for automobile wheels, is characterized in that, procedure of processing comprises:
A, casting bar material, the percentage by weight of each chemical composition of control lever material should meet following requirement: C0.27~0.34, Mn0.45~0.65, V0.05-0.15, Si0.15~0.35, W0.01-0.04, P≤0.025, S≤0.025, Ni1.55~2.00, Cr0.65~0.95, Mo0.20~0.30, Cu≤0.20;
B, bar material after casting do pickling processes; According to the wire diameter requirement of bolt, it is taken out to line, so that described bar material is retracted to the required wire diameter of bolt; The bar material shrinking after wire diameter is cut to the required length of bolt, at normal temperatures the bar material after cutting off is put into mold cavity, make bar material form required head and the bar portion size of bolt with upset force; Utilize fine turning lathe to form screw thread in the outer peripheral face turning of bar material bar portion, the cutter on lathe is Sintox, and the operating rate of lathe tool ensures at 3300-3500r.p.m, and starts feed by the relative one end of disc head portions, cutting fluid employing water-base cutting fluid;
C, heat treatment by bolt at 940 DEG C ± 10 DEG C, quench with quenching oil, again the bolt after quenching is carried out to tempering at 500 DEG C, 100 minutes duration, 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 to tempering at 600 DEG C, 60 minutes duration, finally carry out Carburization Treatment, carburizer is sent in tempering furnace, Carburization Treatment 50~120min in 1100 DEG C~1150 DEG C temperature ranges, described carburizer is by 30~50 parts of alundum (Al2O3) fine powders, 10~30 parts of granular graphites and carbonate or/and 30~50 parts of bicarbonates after being uniformly mixed, obtain,
D, phosphatization processing, it is to process 4-5min in the surface phosphorization treatment fluid of 100-120 DEG C that bolt after heat treatment is immersed to temperature, described surface phosphorization treatment fluid is by zinc dihydrogen phosphate: zinc nitrate: sodium carbonate: water forms, and its each composition weight proportioning is respectively: 11~20 parts, 15~30 parts, 5~10 parts, 200~300 parts;
E, blackening process carry out blackening process to bolt, control 100 DEG C-110 DEG C of temperature; Time 25-30 minute; Clean again, air-dry, bolt gets product.
CN201210511900.3A 2012-12-04 2012-12-04 The preparation method of fastening bolt used for automobile wheels Active CN103088268B (en)

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Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103212957B (en) * 2013-05-10 2016-02-03 江苏永昊高强度螺栓有限公司 Processing method of high-strength bolts
CN103317313B (en) * 2013-07-15 2017-02-08 鹏驰五金制品有限公司 Automobile hub bolt and machining technology thereof
CN103522066B (en) * 2013-10-12 2015-10-28 芜湖开瑞金属科技有限公司 The automatic pier nose equipment of solid automobile suspension hook
CN103820726A (en) * 2014-03-17 2014-05-28 河南赛诺米特种设备有限公司 Method for manufacturing bolts with relatively high fatigue strength
CN105112792A (en) * 2015-07-15 2015-12-02 江苏永昊高强度螺栓有限公司 High-strength bolt
CN105112813A (en) * 2015-07-15 2015-12-02 江苏永昊高强度螺栓有限公司 Zinc-plating bolt
CN105149866A (en) * 2015-07-16 2015-12-16 江苏永昊高强度螺栓有限公司 Method for machining high-strength T-shaped bolt
CN105420588A (en) * 2015-11-03 2016-03-23 合肥海源机械有限公司 Preparation method of automobile hub fixed bolt
CN106282814A (en) * 2016-08-15 2017-01-04 合肥万向钱潮汽车零部件有限公司 A kind of anti abrasive automobile lathe
CN111842774A (en) * 2020-07-29 2020-10-30 苏州畅利永紧固件有限公司 Outer hexagonal cross bolt machining process

Citations (3)

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Publication number Priority date Publication date Assignee Title
CN1570185A (en) * 2004-04-30 2005-01-26 石家庄铁道学院 Shape memory alloy check nut and manufacturing technique
CN101890618A (en) * 2010-06-17 2010-11-24 鹏驰五金制品有限公司 Processing method of high-strength bolts
CN102260831A (en) * 2011-07-08 2011-11-30 曾美霞 Fastener, such as screw bolt, screw nut and the like made from high-strength steel

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JP5167616B2 (en) * 2005-10-31 2013-03-21 Jfeスチール株式会社 Metal bolts with excellent delayed fracture resistance

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1570185A (en) * 2004-04-30 2005-01-26 石家庄铁道学院 Shape memory alloy check nut and manufacturing technique
CN101890618A (en) * 2010-06-17 2010-11-24 鹏驰五金制品有限公司 Processing method of high-strength bolts
CN102260831A (en) * 2011-07-08 2011-11-30 曾美霞 Fastener, such as screw bolt, screw nut and the like made from high-strength steel

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