CN102876859B - Spheroidizing annealing process of screw wire rod - Google Patents
Spheroidizing annealing process of screw wire rod Download PDFInfo
- Publication number
- CN102876859B CN102876859B CN 201210426658 CN201210426658A CN102876859B CN 102876859 B CN102876859 B CN 102876859B CN 201210426658 CN201210426658 CN 201210426658 CN 201210426658 A CN201210426658 A CN 201210426658A CN 102876859 B CN102876859 B CN 102876859B
- Authority
- CN
- China
- Prior art keywords
- wire rod
- cooling
- screw wire
- stove
- temperature
- 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.)
- Active
Links
Landscapes
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention relates to an annealing process of a metal material, in particular to a spheroidizing annealing process of a screw wire rod. The spheroidizing annealing process comprises the following steps: placing the screw wire rod into a heat treatment furnace, filing insert gas into the heat treatment furnace, heating the temperature in the furnace to 710-730 DEG C, and thermally insulating for 5-8 hours; cooling at the first stage, that is to say, cooling the temperature in the furnace to 540-560 DEG C at the speed of 20 DEG C per hour; cooling at the first stage, that is to say, cooling the temperature in the furnace to 390-410 DEG C at the speed of 80 DEG C per hour; and cooling in the third stage, that is to say, discharging the screw wire rod and naturally cooling to normal temperature. The screw wire rod treated by the process method provided in the invention has the advantages of high ductility and low hardness, and is suitable for sequential plastic processing molding, and a product has low molding cracking rate.
Description
Technical field
The present invention relates to the annealing process of metallic substance, be specifically related to a kind of carbide annealing process of screw wire rod.
Background technology
Spheroidizing Annealing is one of Basic Ways of improving structure of steel and performance, the main purpose of Spheroidizing Annealing is the carbide spheroidization made in the microtexture of ferrous materials, reduces the hardness of material, improves the plasticity of material, reduce the resistance to deformation of material, make material be easy to plastic working and be shaped.Will obtain ideal performance and tissue in the screw wire production, key is to select suitable carbide annealing process.
The Chinese invention patent that publication number is CN1245524C has been introduced a kind of spheroidal annealing, workpiece is put into to annealing furnace, control acid extraction, carry out annealing process, it is characterized in that in annealing process taking following method and step: a, adopt mechanical pump to extract fast the annealing furnace air, while in stove, forming the vacuum tightness of 10-50pa, mechanical pump quits work, to passing into purity in stove, be 99.8% industrial nitrogen immediately, when furnace pressure reaches the positive pressure of 1500-2500pa, stop filling nitrogen; B, along with slowly release in stove, when Pressure Drop during to the positive pressure of 150-300pa, repeating step a; The step of c, above " intermittent vacuum+filling nitrogen " repeats, until annealing process finishes.
At present, aborning, during the screw wire rod of smelting low carbon steel alloy, after according to existing technique, the screw wire rod being carried out to Slow cooling or annealing, hardness is higher, and crackle appears in large quantities of screw wire rods, and the lighter need utilize the crack site excision, severe one directly causes the screw wire rod of producing to be scrapped, and has a strong impact on quality and the lumber recovery of screw wire rod.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of carbide annealing process of screw wire rod is provided, adopt that screw wire rod ductility after processing method of the present invention is processed is high, hardness is low, is applicable to follow-up plastic working and is shaped, the product shaping cracking rate is low.
Purpose of the present invention is achieved through the following technical solutions:
A kind of carbide annealing process of screw wire rod, it in turn includes the following steps:
A, the screw wire rod is placed in to heat treatment furnace, the screw wire rod is placed in to heat treatment furnace, be filled with rare gas element in the heat treated stove, then the temperature in stove is risen to 710-730 ℃, insulation 5-8h;
B, first stage are cooling: the temperature in stove is cooled to 540-560 ℃ with the speed of 20 ℃/hs;
C, subordinate phase are cooling: continue the temperature in stove is cooled to 390-410 ℃ with the speed of 80 ℃/hs
D, phase III are cooling: the screw wire rod is come out of the stove and is naturally cooled to normal temperature.
Preferably, it in turn includes the following steps:
A, the screw wire rod is placed in to heat treatment furnace, is filled with rare gas element in the heat treated stove, then the temperature in stove is risen to 720 ℃, insulation 6h;
B, first stage are cooling: the temperature in stove is cooled to 550 ℃ with the speed of 20 ℃/hs;
C, subordinate phase are cooling: continue the temperature in stove is cooled to 400 ℃ with the speed of 80 ℃/hs
D, phase III are cooling: the screw wire rod is come out of the stove and is naturally cooled to normal temperature.
Wherein, the industrial nitrogen that the rare gas element that described steps A is filled with is purity 99.9%.
Wherein, in described steps A, the temperature in stove is warming up to 710-730 ℃ with the speed of 100-145 ℃/h.
Wherein, cooling and described subordinate phase of described first stage is cooling is to be undertaken cooling by air-cooled mode.
Wherein, the material of described screw wire rod is low-carbon alloy steel 10B21.
The present invention compared with prior art, has following advantage and beneficial effect:
The carbide annealing process of a kind of screw wire rod provided by the invention, at first being warming up to 710-730 ℃ is incubated, because if holding temperature is too high, cementite will evenly be dissolved in austenite, thereby forms single uniform austenite structure, according to the nodularization theory, austenite is difficult to be transformed into the spheroidite tissue uniformly, in like manner, and when holding temperature is low, cementite, by fully molten disconnected, is not difficult to obtain spherodized structure yet.Then adopt the Slow cooling mode that the first stage is cooling, subordinate phase is cooling and the phase III is cooling, make cementite nodularization rate raise gradually, uniformity coefficient is also better, if speed of cooling is too fast, the spherodized structure obtained is inhomogeneous; If speed of cooling is excessively slow, the sheet globular cementite in original structure is difficult to fragmentation, does not reach good nodularization effect.To sum up, it is better that the present invention adopts intensification, insulation, the first stage is cooling, subordinate phase is cooling and the phase III is cooling technique to reach the Spheroidizing Annealing effect, screw wire rod ductility is high, hardness is low, being applicable to follow-up plastic working is shaped, the advantage that the product shaping cracking rate is low, this technical process simultaneously is simple, not high to equipment requirements, production efficiency is high, and cost is lower.
embodiment:
For the ease of those skilled in the art's understanding, below in conjunction with embodiment, the present invention is described in further detail, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
A kind of carbide annealing process of screw wire rod, it in turn includes the following steps:
A, the screw wire rod that is low-carbon alloy steel 10B21 by material are placed in heat treatment furnace, the screw wire rod is placed in to heat treatment furnace, be filled with the industrial nitrogen that purity is 99.9% in the heat treated stove, the temperature in stove is warming up to 710 ℃ with the speed of 100 ℃/hs, insulation 5h;
B, first stage are cooling: the temperature in stove is cooled to 540 ℃ by air-cooled mode with the speed of 20 ℃/hs;
C, subordinate phase are cooling: continue the temperature in stove is cooled to 390 ℃ by air-cooled mode with the speed of 80 ℃/hs
D, phase III are cooling: the screw wire rod is come out of the stove and is naturally cooled to normal temperature.
The screw wire rod that to process through the present embodiment carries out the Rockwell hardness check, and its hardness is 117 after testing.
The screw wire rod that to process through the present embodiment laterally carries out metallurgical analysis under opticmicroscope, find on ferrite matrix disperse granular (or spherical) carbide that distributing, and disperse is even.
In a word, adopt that screw wire rod ductility after processing method of the present invention is processed is high, hardness is low, is applicable to follow-up plastic working and is shaped, the product shaping cracking rate is low.
Embodiment 2
A kind of carbide annealing process of screw wire rod, it in turn includes the following steps:
A, the screw wire rod that is low-carbon alloy steel 10B21 by material are placed in heat treatment furnace, the screw wire rod is placed in to heat treatment furnace, be filled with the industrial nitrogen of purity 99.9% in the heat treated stove, then the temperature in stove is warming up to 720 ℃ with the speed of 130 ℃/hs, insulation 6h;
B, first stage are cooling: the temperature in stove is cooled to 550 ℃ by air-cooled mode with the speed of 20 ℃/hs;
C, subordinate phase are cooling: continue the temperature in stove is cooled to 400 ℃ by air-cooled mode with the speed of 80 ℃/hs
D, phase III are cooling: the screw wire rod is come out of the stove and is naturally cooled to normal temperature.
The screw wire rod that to process through the present embodiment carries out the Rockwell hardness check, and its hardness is 116 after testing.
The screw wire rod that to process through the present embodiment laterally under opticmicroscope (500 *) carry out metallurgical analysis, find on ferrite matrix disperse granular (or spherical) carbide that distributing, and disperse is even.
In a word, adopt that screw wire rod ductility after processing method of the present invention is processed is high, hardness is low, is applicable to follow-up plastic working and is shaped, the product shaping cracking rate is low.
Embodiment 3
A kind of carbide annealing process of screw wire rod, it in turn includes the following steps:
A, the screw wire rod that is low-carbon alloy steel 10B21 by material are placed in heat treatment furnace, the screw wire rod is placed in to heat treatment furnace, be filled with the industrial nitrogen of purity 99.9% in the heat treated stove, the temperature in stove is warming up to 730 ℃ with the speed of 145 ℃/hs, insulation 8h;
B, first stage are cooling: the temperature in stove is cooled to 560 ℃ by air-cooled mode with the speed of 20 ℃/hs;
C, subordinate phase are cooling: continue the temperature in stove is cooled to 410 ℃ by air-cooled mode with the speed of 80 ℃/hs
D, phase III are cooling: the screw wire rod is come out of the stove and is naturally cooled to normal temperature.
The screw wire rod that to process through the present embodiment carries out the Rockwell hardness check, and its hardness is 118 after testing.
The screw wire rod that to process through the present embodiment laterally under opticmicroscope (500 *) carry out metallurgical analysis, find on ferrite matrix disperse granular (or spherical) carbide that distributing, and disperse is even.
In a word, adopt that screw wire rod ductility after processing method of the present invention is processed is high, hardness is low, is applicable to follow-up plastic working and is shaped, the product shaping cracking rate is low.
Above-described embodiment is preferably embodiment of the present invention, but embodiments of the present invention are not restricted to the described embodiments, and the equivalent variations of therefore doing according to the present patent application the scope of the claims, within being included in protection scope of the present invention.
Claims (5)
1. the carbide annealing process of a screw wire rod, it is characterized in that: it in turn includes the following steps:
A, the screw wire rod is placed in to heat treatment furnace, is filled with rare gas element in the heat treated stove, then the temperature in stove is risen to 710-730 ℃, insulation 5-8h;
B, first stage are cooling: the temperature in stove is cooled to 540-560 ℃ with the speed of 20 ℃/hs;
C, subordinate phase are cooling: continue the temperature in stove is cooled to 390-410 ℃ with the speed of 80 ℃/hs;
D, phase III are cooling: the screw wire rod is come out of the stove and is naturally cooled to normal temperature,
Wherein, the material of described screw wire rod is low-carbon alloy steel 10B21.
2. the carbide annealing process of a kind of screw wire rod according to claim 1, it is characterized in that: it in turn includes the following steps:
A, the screw wire rod is placed in to heat treatment furnace, is filled with rare gas element in the heat treated stove, then the temperature in stove is risen to 720 ℃, insulation 6h;
B, first stage are cooling: the temperature in stove is cooled to 550 ℃ with the speed of 20 ℃/hs;
C, subordinate phase are cooling: continue the temperature in stove is cooled to 400 ℃ with the speed of 80 ℃/hs;
D, phase III are cooling: the screw wire rod is come out of the stove and is naturally cooled to normal temperature.
3. the carbide annealing process of a kind of screw wire rod according to claim 1, is characterized in that: the industrial nitrogen that the rare gas element that described steps A is filled with is purity 99.9%.
4. the carbide annealing process of a kind of screw wire rod according to claim 1 is characterized in that: in described steps A, the temperature in stove is warming up to 710-730 ℃ with the speed of 100-145 ℃/h.
5. the carbide annealing process of a kind of screw wire rod according to claim 1, it is characterized in that: cooling and described subordinate phase of described first stage is cooling is to be undertaken cooling by air-cooled mode.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201210426658 CN102876859B (en) | 2012-10-31 | 2012-10-31 | Spheroidizing annealing process of screw wire rod |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201210426658 CN102876859B (en) | 2012-10-31 | 2012-10-31 | Spheroidizing annealing process of screw wire rod |
Publications (2)
Publication Number | Publication Date |
---|---|
CN102876859A CN102876859A (en) | 2013-01-16 |
CN102876859B true CN102876859B (en) | 2013-12-25 |
Family
ID=47478369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 201210426658 Active CN102876859B (en) | 2012-10-31 | 2012-10-31 | Spheroidizing annealing process of screw wire rod |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN102876859B (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103993140A (en) * | 2014-04-19 | 2014-08-20 | 东莞市科力钢铁线材有限公司 | Spheroidizing annealing technology of low-hardness fastener wires |
CN103993141A (en) * | 2014-04-23 | 2014-08-20 | 东莞市科力钢铁线材有限公司 | Spheroidizing annealing process for high-toughness medium carbon steel wires |
CN104404208A (en) * | 2014-09-26 | 2015-03-11 | 无锡市羊尖盛裕机械配件厂 | Fastener annealing process |
CN104307914A (en) * | 2014-09-26 | 2015-01-28 | 无锡市羊尖盛裕机械配件厂 | Screw wire manufacturing technology |
CN104451048B (en) * | 2014-10-23 | 2016-11-30 | 杭州嘉诺德金属冷拉有限公司 | A kind of crack resistence boron steel isothermal spheroidizing method |
CN107090539A (en) * | 2017-06-23 | 2017-08-25 | 江苏丰东热处理及表面改性工程技术研究有限公司 | A kind of bearing steel vacuum isothermal annealing process |
CN108176954A (en) * | 2017-12-15 | 2018-06-19 | 浙江天力机车部件有限公司 | The forming technology of fastener |
CN108384929A (en) * | 2018-04-25 | 2018-08-10 | 黄骅聚金五金制品有限公司 | A kind of annealing process of high-intensity fasteners bolt material |
CN111378905B (en) * | 2018-12-29 | 2021-10-08 | 东莞科力线材技术有限公司 | Preparation method of fastener wire of baby carrier |
CN111375649A (en) * | 2018-12-29 | 2020-07-07 | 东莞科力线材技术有限公司 | Preparation method of automobile fastener wire |
CN109735692A (en) * | 2019-03-06 | 2019-05-10 | 浙江亚磊型钢冷拔有限公司 | A kind of steel staged annealing process |
CN112280942A (en) * | 2020-09-01 | 2021-01-29 | 山西太钢不锈钢股份有限公司 | Martensitic stainless steel 2Cr13 wire annealing process |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4375378A (en) * | 1979-12-07 | 1983-03-01 | Nippon Steel Corporation | Process for producing spheroidized wire rod |
CN102433502A (en) * | 2011-12-23 | 2012-05-02 | 中冶南方(武汉)威仕工业炉有限公司 | Spheroidized annealing technology for GCr15 bearing steel |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4646866B2 (en) * | 2006-01-24 | 2011-03-09 | 株式会社神戸製鋼所 | BEARING STEEL WIRE EXCELLENT IN DRAWING AND METHOD FOR PRODUCING THE SAME |
-
2012
- 2012-10-31 CN CN 201210426658 patent/CN102876859B/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4375378A (en) * | 1979-12-07 | 1983-03-01 | Nippon Steel Corporation | Process for producing spheroidized wire rod |
CN102433502A (en) * | 2011-12-23 | 2012-05-02 | 中冶南方(武汉)威仕工业炉有限公司 | Spheroidized annealing technology for GCr15 bearing steel |
Non-Patent Citations (1)
Title |
---|
JP特开2007-224410A 2007.09.06 |
Also Published As
Publication number | Publication date |
---|---|
CN102876859A (en) | 2013-01-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN102876859B (en) | Spheroidizing annealing process of screw wire rod | |
CN102994710B (en) | Spheroidizing annealing process of superplasticity fastener wire rod | |
CN103343200B (en) | Short-process thermal treatment method of large 35CrNi3MoV steel forgings | |
CN104532154A (en) | High-hardness high-polishing pre-hardening plastic die steel and manufacture technology thereof | |
CN103305672A (en) | Heat treatment process for ultra-large type tube plate forge piece of pressure container | |
CN103555904B (en) | Thermal treatment process capable of improving low-temperature impact work of ASTM508Gr2 steel | |
CN103305673A (en) | Method for manufacturing fine-grain 35CrNi3MoV steel large forging stock | |
CN100584963C (en) | Austenitic stainless steel as-forged solid solution treatment process after forging | |
CN103993140A (en) | Spheroidizing annealing technology of low-hardness fastener wires | |
CN103394573A (en) | Hot stamping forming process based on Q&P one-step method | |
CN108441613B (en) | A kind of anti-white point control method of age-hardening plastic mould steel | |
CN103031486A (en) | High-carbon and medium-carbon large-diameter forged grinding ball and production process thereof | |
CN103409690A (en) | Low activation steel and making method thereof | |
CN102191437A (en) | Seamless steel tube for petroleum cracking and heat treatment method thereof | |
CN102989952A (en) | Processing method of wire support clamp | |
CN103993141A (en) | Spheroidizing annealing process for high-toughness medium carbon steel wires | |
CN105018712A (en) | Spheroidizing annealing process of superplastic medium carbon steel wire | |
CN104109800B (en) | High intensity is containing vanadium height manganese nonmagnetic steel and production method thereof | |
CN104232858A (en) | Spheroidizing annealing technology of high-tenacity fastener wire rod | |
CN103757195A (en) | Spheroidizing annealing process of fastener wire rod | |
CN108796181A (en) | One discharge plate member is heat-treated annealing process | |
CN104878166A (en) | Spheroidized annealing process for shortening annealing cycle of hot rolled wire rods | |
CN103045958A (en) | High-strength steel plate used at low temperature of subzero 50 DEG C and preparation method thereof | |
CN104109811A (en) | Mn-Cr-V ultra-high strength non-magnetic steel and production method thereof | |
CN111545701B (en) | Preparation method of stainless steel screw shaft |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CP03 | Change of name, title or address |
Address after: 523000 Guangdong province Dongguan city Wangniudun Industrial Park in Dongxing Patentee after: Dongguan Keli Wire Technology Co. Ltd. Address before: 523196 Guangdong province Dongguan city Wangniudun Industrial Park Dongxing Dongguan Keli steel wire Co. Ltd. Patentee before: Dongguan Kelee Steel Wire Co., Ltd. |
|
CP03 | Change of name, title or address |