CN103060675B - A kind of 05 grade high-strength nut anneal-free coil rod and production method thereof - Google Patents
A kind of 05 grade high-strength nut anneal-free coil rod and production method thereof Download PDFInfo
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- CN103060675B CN103060675B CN201210418969.1A CN201210418969A CN103060675B CN 103060675 B CN103060675 B CN 103060675B CN 201210418969 A CN201210418969 A CN 201210418969A CN 103060675 B CN103060675 B CN 103060675B
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Abstract
The present invention provides a kind of 05 grade high-strength nut anneal-free coil rod, the chemical composition of described wire rod is: the percentage by weight of carbon content controls 0.19～0.36%, the percentage by weight of Fe content controls 0.55～0.85%, the percentage by weight of silicone content controls≤0.08%, the percentage by weight of sulfur content controls≤0.025%, the percentage by weight of phosphorus content controls≤0.025%, the percentage by weight of Boron contents controls 0.0015～0.004%, the anneal-free coil rod of the present invention, its tensile strength≤530MPa, elongation percentage >=25%, reduction of area >=50%, 1/3 cold-heading is qualified, excellent combination property.The production method of the present invention, saves annealing operation, reduces the production cost of nut, has significant energy-conservation of consumption reduction, environment protecting.
Description
Technical field
The invention belongs to steel production and processing technology technical field, more specifically, relate to a kind of 05 grade high
Intensity nut anneal-free coil rod, the present invention also relates to the production method of this anneal-free coil rod.
Background technology
The medium carbon cold heading steel produced according to metallurgical production process flow process of the prior art, is making 05 grade high
During intensity thin wall type nut, in order to meet aximal deformation value and thin-walled cold-heading processing characteristics requirement, cold
Pull out with cold upset forming before, need to carry out spheroidizing time-consuming, power consumption and process, to reach there is low deformation
Drag and excellent plasticity, this annealing often cycle is long, will consume the substantial amounts of energy and resource, also
Pollute environment.Chinese patent: the patent No. 99115353.7, the ball of high-speed great-deformation hot-rolled and cold-upset steel carbide
Annealing technique.Although tradition annealing process is improved, shorten annealing time, but still need to
Off-line spheroidizing.Chinese patent: the patent No. 200410103089.0,8.8 grade high-strength cold forging steel heat
Roll the production method of anneal-free coil rod.Although make medium carbon cold heading steel wire rod directly obtain softening online, can exempt to move back
Fire medium carbon cold heading steel wire rod makes 8.8 grade high-strength bolts, saves the annealing operation before cold-heading, but due to only
The carbide of pearlite is carried out fragmentation process, only part nodularization, therefore has been only used for inside and outside hexagonal 8.8
Grade bolt exempts from annealing, it is impossible to for the nut fastener that shape is complicated again.
Summary of the invention
The technical problem to be solved is: for the deficiencies in the prior art, it is provided that one has well
Cold-drawn and 05 grade high-strength nut anneal-free coil rod of cold heading technique performance.
Techniques discussed above problem to be solved, the technical scheme that the present invention takes is:
The present invention is a kind of 05 grade high-strength nut anneal-free coil rod, and 05 described grade high-strength nut is used
The chemical composition of anneal-free coil rod is: the percentage by weight of carbon content controls 0.19～0.36%, Fe content
Percentage by weight control that the percentage by weight in 0.55～0.85%, silicone content controls≤0.08%, sulfur contains
The percentage by weight of amount controls≤0.025%, and the percentage by weight of phosphorus content controls≤0.025%, boron contains
The percentage by weight of amount controls 0.0015～0.004%.
The invention still further relates to the production method of 05 grade high-strength nut anneal-free coil rod, strand passes through high-speed line
Strand is rolled into when can manufacture high strength nut anneal-free coil rod by material hot-rolling mill, the heating of described strand
Time controls between 65～100 minutes, and heating and temperature control is between 1000～1200 DEG C, furnace pressure
Control in the range of≤5 handkerchiefs；The start rolling temperature of rolling temperature controls between 1000～1100 DEG C, finish to gauge
Temperature controls between 720～800 DEG C, and laying temperature controls between 730～810 DEG C；Described is rolled into
Steel gren rod carry out cooling process time, steel gren rod is cooled to the speed of 3 DEG C/s～10 DEG C/s
720～660 DEG C of interval phase transformations, and slow at the lower-speed state of 3 DEG C/s～10 DEG C/s isothermal or 0.2 DEG C/below s
Cold, after retention time 600～1800 seconds, steel gren rod natural cooling.
Use technical scheme, can obtain following beneficial effect:
05 grade high-strength nut anneal-free coil rod of the present invention, its tensile strength≤530MPa, extension
Rate >=25%, reduction of area >=50%, 1/3 cold-heading are qualified, excellent combination property.05 grade high of the present invention
05 grade of nut that intensity nut makes of anneal-free coil rod, end properties meets GB/T3098.2-2000 to tightly
Indices in 05 grade of nut (coarse thread rib-loop) standard in firmware mechanical performance, and wire rod poker characteristic
Well, the scattered error of properties is the least.The production method of the present invention, saves annealing operation, is substantially reduced
The production cost of nut, has significant energy-conservation of consumption reduction, environment protecting.
Detailed description of the invention
Below against accompanying drawing, by the description to embodiment, the most involved to the detailed description of the invention of the present invention
The shape of each component, structure, mutual alignment between each several part and annexation, the effect of each several part and
Operation principles etc. are described in further detail:
The present invention is a kind of 05 grade high-strength nut anneal-free coil rod, and 05 described grade high-strength nut is used
The chemical composition of anneal-free coil rod is: the percentage by weight of carbon content controls 0.19～0.36%, Fe content
Percentage by weight control that the percentage by weight in 0.55～0.85%, silicone content controls≤0.08%, sulfur contains
The percentage by weight of amount controls≤0.025%, and the percentage by weight of phosphorus content controls≤0.025%, boron contains
The percentage by weight of amount controls 0.0015～0.004%.
The invention still further relates to the production method of 05 grade high-strength nut anneal-free coil rod, strand passes through high-speed line
Strand is rolled into when can manufacture high strength nut anneal-free coil rod by material hot-rolling mill, the heating of described strand
Time controls between 65～100 minutes, and heating and temperature control is between 1000～1200 DEG C, furnace pressure
Control in the range of≤5 handkerchiefs；The start rolling temperature of rolling temperature controls between 1000～1100 DEG C, finish to gauge
Temperature controls between 720～800 DEG C, and laying temperature controls between 730～810 DEG C；Described is rolled into
Steel gren rod carry out cooling process time, steel gren rod is cooled to the speed of 3 DEG C/s～10 DEG C/s
720～660 DEG C of interval phase transformations, and slow at the lower-speed state of 3 DEG C/s～10 DEG C/s isothermal or 0.2 DEG C/below s
Cold, after retention time 600～1800 seconds, steel gren rod natural cooling.
It is the specific embodiment of the steel processing high strength nut of the production method production of the present invention below:
Embodiment 1: by the cold-forging steel gren rod of the φ 12.0mm specification that present invention process produces, tension is strong
Degree 530MPa, elongation percentage 35%, reduction of area 65.5%.Save annealing operation, through pickling → phosphatization → drawing
To φ 11.2mm, cold-heading molding makes M10 nut (Fructus Anisi Stellati small deformation), and after quenching, being tempered, detection is each
Item performance meets GB/T3098.2-2000 to 05 grade of nut (coarse thread rib-loop) standard in securing member mechanical performance
In indices.
Embodiment 2: by the cold-forging steel gren rod of the φ 12.0mm specification that present invention process produces, tension is strong
Degree 515MPa, elongation percentage 33.5%, reduction of area 63.5%.Save annealing operation, through pickling → phosphatization → draw
Pulling out to φ 11.4mm, cold-heading molding makes M12 nut (small powder large deformation), after quenching, being tempered, and detection
Properties meets GB/T3098.2-2000 to 05 grade of nut (coarse thread rib-loop) mark in securing member mechanical performance
Indices in standard.
Embodiment 3: by the cold-forging steel gren rod of the φ 14.0mm specification that present invention process produces, tension is strong
Degree 510MPa, elongation percentage 30.5%, reduction of area 55%.Save annealing operation, through pickling → phosphatization → drawing
To φ 13.5mm, cold-heading molding makes M14 nut (small powder large deformation), and after quenching, being tempered, detection is each
Item performance meets GB/T3098.2-2000 to 05 grade of nut (coarse thread rib-loop) standard in securing member mechanical performance
In indices.
Embodiment 4: by the cold-forging steel gren rod of the φ 14.0mm specification that present invention process produces, tension is strong
Degree 520MPa, elongation percentage 30%, reduction of area 55.5%.Save annealing operation through pickling → phosphatization → be drawn to
φ 13.2mm, cold-heading molding makes M12 nut (Fructus Anisi Stellati small deformation), after quenching, being tempered, detects every
Performance meets GB/T3098.2-2000 in 05 grade of nut (coarse thread rib-loop) standard in securing member mechanical performance
Indices.
Embodiment 5: by the cold-forging steel gren rod of the φ 16.0mm specification that present invention process produces, tension is strong
Degree 515MPa, elongation percentage 28.5%, reduction of area 51.5%.Save annealing operation, through pickling → phosphatization → drawing
To φ 15.3mm, cold-heading molding makes M16 nut (small powder large deformation), quenches, is tempered postorder, detection
Properties meets GB/T3098.2-2000 to 05 grade of nut (coarse thread rib-loop) mark in securing member mechanical performance
Indices in standard.
Embodiment 6: by the cold-forging steel gren rod of the φ 16.0mm specification that present invention process produces, tension is strong
Degree 500MPa, elongation percentage 29.5%, reduction of area 51%.Save annealing operation, through pickling → phosphatization → be drawn to
φ 15.5mm, cold-heading molding is made M12 nut (Fructus Anisi Stellati small deformation), is quenched, is tempered postorder, detects each
Item performance meets GB/T3098.2-2000 to 05 grade of nut (coarse thread rib-loop) standard in securing member mechanical performance
In indices.
05 grade high-strength nut anneal-free coil rod of the present invention, its tensile strength≤530MPa, extension
Rate >=25%, reduction of area >=50%, 1/3 cold-heading are qualified, excellent combination property.05 grade high of the present invention
05 grade of nut that intensity nut makes of anneal-free coil rod, end properties meets GB/T3098.2-2000 to tightly
Indices in 05 grade of nut (coarse thread rib-loop) standard in firmware mechanical performance, and wire rod poker characteristic
Well, the scattered error of properties is the least.The production method of the present invention, saves annealing operation, is substantially reduced
The production cost of nut, has significant energy-conservation of consumption reduction, environment protecting.
Above in conjunction with accompanying drawing, the present invention is carried out exemplary description, it is clear that concrete implementation of the present invention is not
Limited by aforesaid way, if the various improvement that the method design that have employed the present invention is carried out with technical scheme,
Or the most improved design by the present invention and technical scheme directly apply to other occasions, all the present invention's
In protection domain.
Claims (1)
1. a production method for 05 grade high-strength nut anneal-free coil rod, 05 described grade high-strength spiral shell
The chemical composition of mother's anneal-free coil rod is: the percentage by weight of carbon content controls 0.19～0.36%, and manganese contains
The percentage by weight of amount control the percentage by weight in 0.55～0.85%, silicone content control≤0.08%, sulfur
The percentage by weight of content controls≤0.025%, and the percentage by weight of phosphorus content controls≤0.025%, boron
The percentage by weight of content controls 0.0015～0.004%, it is characterised in that: strand is by high-speed rod warm
Strand is rolled into when can manufacture high strength nut anneal-free coil rod by milling train, the heat time heating time of described strand
Controlling between 65～100 minutes, heating and temperature control is between 1000～1200 DEG C, furnace pressure control
In the range of≤5 handkerchiefs；The start rolling temperature of rolling temperature controls between 1000～1100 DEG C, finishing temperature control
System is between 720～800 DEG C, and laying temperature controls between 730～810 DEG C；The described steel being rolled into heat
Roll wire rod carry out cooling process time, steel gren rod is cooled to 720～660 DEG C with the speed of 3 DEG C/s～10 DEG C/s
Interval phase transformation, and in the lower-speed state slow cooling of 0.2 DEG C/below s, after the retention time continues 600～1800 seconds,
Steel gren rod natural cooling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210418969.1A CN103060675B (en) | 2012-10-29 | 2012-10-29 | A kind of 05 grade high-strength nut anneal-free coil rod and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210418969.1A CN103060675B (en) | 2012-10-29 | 2012-10-29 | A kind of 05 grade high-strength nut anneal-free coil rod and production method thereof |
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| CN103060675A CN103060675A (en) | 2013-04-24 |
| CN103060675B true CN103060675B (en) | 2016-08-10 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924151A (en) * | 2014-04-10 | 2014-07-16 | 马钢(集团)控股有限公司 | Rolled steel for 8-Grade nuts and production method thereof |
| CN104439940B (en) * | 2014-11-08 | 2017-02-22 | 佛山市品固金属制品有限公司 | Clamp nut casting technology based on casting and rolling combined forming |
| CN108160741A (en) * | 2017-12-28 | 2018-06-15 | 东莞科力线材技术有限公司 | Press part steel alloy wire rod preparation method, press part and its hardening and tempering process |
| CN113122699A (en) * | 2021-04-21 | 2021-07-16 | 山西太钢不锈钢股份有限公司 | Cr13 type stainless steel wire rod and annealing method thereof |
Citations (2)
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|---|---|---|---|---|
| CN101514429A (en) * | 2009-03-27 | 2009-08-26 | 武汉钢铁(集团)公司 | Boracic cold heading wire rod steel and production method thereof |
| CN101619420A (en) * | 2009-07-29 | 2010-01-06 | 马鞍山钢铁股份有限公司 | 10.9-grade chromium-containing non-quenched and tempered cold-heading steel and rolling method of hot finished rod thereof |
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2012
- 2012-10-29 CN CN201210418969.1A patent/CN103060675B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514429A (en) * | 2009-03-27 | 2009-08-26 | 武汉钢铁(集团)公司 | Boracic cold heading wire rod steel and production method thereof |
| CN101619420A (en) * | 2009-07-29 | 2010-01-06 | 马鞍山钢铁股份有限公司 | 10.9-grade chromium-containing non-quenched and tempered cold-heading steel and rolling method of hot finished rod thereof |
Non-Patent Citations (1)
| Title |
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| 加热条件和轧制过程温度对35K盘条组织的影响;杨浩等;《北京科技大学学报》;20101130;第32卷(第11期);1428-1433 * |
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