CN103966411A - Manufacturing method for medium-carbon cold forging steel rods and wires - Google Patents
Manufacturing method for medium-carbon cold forging steel rods and wires Download PDFInfo
- Publication number
- CN103966411A CN103966411A CN201310027491.4A CN201310027491A CN103966411A CN 103966411 A CN103966411 A CN 103966411A CN 201310027491 A CN201310027491 A CN 201310027491A CN 103966411 A CN103966411 A CN 103966411A
- Authority
- CN
- China
- Prior art keywords
- wire rod
- cold heading
- carbon cold
- medium carbon
- rolling
- 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.)
- Granted
Links
Abstract
The invention relates to a manufacturing method for medium-carbon cold forging steel rods and wires. The method comprises the following steps: low temperature rolling with a finish rolling temperature of 700 to 750 DEG C; rapid air cooling after rolling through cooling to 450 to 550 DEG C at a speed of no less than 0.5 DEG C/s; rapid induction heating pretreatment through heating to 730 to 750 DEG C at a speed of 5 to 15 DEG C/s and heat preservation for 2 to 3 min; and spheroidizing annealing heat treatment through heating to 760 to 780 DEG C with a furnace, heat preservation for 60 to 80 min, cooling to 680 to 710 DEG C, heat preservation for 80 to 120 min and air cooling out of the furnace. With the method provided by the invention, spheroidizing annealing heat treatment time for medium-carbon cold forging steel balls is substantially shortened by more than 50%, and heat treatment efficiency is greatly improved; obtained medium-carbon cold forging steel has at least a same balling rate and same hardness and cold forging performance compared with current medium-carbon cold forging steel annealed for a long time, and high requirements on cold forging steel in the fastener industry are satisfied.
Description
Technical field
The present invention relates to cold-heading rod iron method for manufacturing wire, relate in particular to a kind of manufacture method of medium carbon cold heading steel rod wire rod.
Background technology
The steel grade of the cold heading steel is generally low, middle carbon carbon constructional quality steel and structural alloy steel.Cold heading steel product is mainly used in the industries such as automobile, shipbuilding, device fabrication, electronics, household electrical appliances, bike, instrument, Lightweight Steel Construction, building.Described cold heading steel can be the excellent wire rod obtaining through die casting-breaking down cogging or continuous casting blooms-breaking down cogging or continuous cast billet rolling and air cooling on bar wire rod rolling mill.SWRCH35K is widely used a kind of medium carbon cold heading steel in domestic and international fastener products, be used to make high strength (more than 8.8 grades) fastening piece, before cold-heading, must carry out " two draw one move back " art breading, first will carry out pickling, drawing, Spheroidizing Annealing (or softening annealing) and several roads of drawing technique.The existing cold heading steel annealing operation time is long, and the each minimum work time-consuming that needs 8-20 hour, not only increases cost, but also contaminate environment.
Both at home and abroad the relevant patent that shortens cold heading steel nodularization (or softening) annealing time, carry out the cold heading steel patent of on-lining soften rolling processing and exempt from the cold heading steel patent of anneal as follows:
Chinese patent CN1256320A discloses the cold heading steel that a kind of carbon content of high-speed great-deformation is 0.15 ~ 0.65%, and this cold heading steel adopts lower than critical temperature A
c1660-720 DEG C of samming after be incubated 3 hours, be cooled to subsequently room temperature, be incubated more than 10 hours traditional cold heading steel carbide annealing process than need, soaking time shortens greatly, but this technique is mainly applicable to the wire rod of the high-speed rod-rolling mill rolling of high-speed great-deformation, inapplicable to the bar of low-speed mill rolling; Simple annealing thermal treatment is only provided, the operation of rolling before wire rod has not been had to substantial solution.
Chinese patent CN101045238A discloses carbon alloy cold heading steel on-lining soften rolling method in one, adopt high-speed rod-rolling mill carry out just at 950-1180 DEG C, in, pre-finish rolling, then water tank is cooled to 700-820 DEG C and carries out finish rolling, rolled piece accumulative total draft 50-85%, rate of deformation is 1/5-1/30s, after finish rolling, rolled piece water-cooled is weaved silk to 680-780 DEG C, with the cooling rate slow cooling 600-2400s of the 0.01-0.5 DEG C/s of volume that falls apart, then naturally cool to room temperature, can simplify Spheroidizing Annealing and process and shorten the Spheroidizing Annealing time and obtain softening wire rod.Due to it, to roll rear loose volume speed of cooling slow, and pearlitic structure can not get refinement, and the rolling deformation energy storing is relatively less.The follow-up Spheroidizing Annealing time can not get better shortening.Owing to rolling rear slow cooling, the production efficiency of line is produced in impact in addition.
Chinese patent CN102321851A discloses a kind of 10.9 grades of boracics and has exempted from Spheroidizing Annealing the cold heading steel and manufacture method thereof, this steel grades relative complex, add more alloying element as B, Cr, Ni, V, its high speed wire rolling start rolling temperature is 880-950 DEG C, laying temperature is 850-900 DEG C, when cooling, adopt deep bid spiral cooling in heap or stelmor line traffic control cold, corresponding cooling rate is respectively 0.2-1 DEG C/s and 0.4-3 DEG C/s, can omit Spheroidizing Annealing operation, directly cold-heading after drawing, but its rolling, laying temperature is too high, surface oxidation skin depth, affect the follow-up use of user, and it is more to add alloying element, cost is high.
Summary of the invention
The manufacture method that the object of the present invention is to provide a kind of medium carbon cold heading steel rod wire rod, to solve the deficiencies in the prior art or defect, can make medium carbon cold heading steel Spheroidizing Annealing heat treatment time significantly shorten more than 50%.
To achieve these goals, the present invention adopts following technical scheme:
The manufacture method of medium carbon cold heading steel of the present invention rod wire rod adopts low temperature rolling, roll after the technique such as quenching, induction heating pre-treatment, Spheroidizing Annealing thermal treatment immediately.
Particularly, a kind of manufacture method of medium carbon cold heading steel rod wire rod, comprises the steps:
(1) heating and rolling:
First by the steel billet of medium carbon cold heading steel at 950-1050 DEG C of heating 1-2 hour, then carry out multi-pass rolling and obtain excellent wire rod, finishing temperature is 700-750 DEG C, rolled piece accumulative total draft >=75%;
(2) roll rear air-cooled fast:
Excellent wire rod after rolling is air-cooled to 450-550 DEG C with the cooling rate of >=0.5 DEG C/s;
(3) induction heating pre-treatment:
Cooled excellent wire rod enters in quick induction heater with the speed of 5-15 DEG C/s and is warming up to 730-750 DEG C and be incubated 2-3 minute;
(4) Spheroidizing Annealing thermal treatment:
The pretreated excellent wire rod of induction heating enters and in spheroidizing annealing furnace, carries out Spheroidizing Annealing thermal treatment, the heat treated condition of Spheroidizing Annealing is: the pretreated excellent wire rod of described induction heating is first warming up to 760-780 DEG C and be incubated 60-80 minute with stove, be cooled to again 680-710 DEG C and be incubated 80-120 minute after the air cooling of coming out of the stove, obtain medium carbon cold heading steel rod wire rod.
The chemical component weight percentage composition of medium carbon cold heading steel rod wire rod of the present invention is: C:0.32～0.38%, and Si:0.10～0.35%, Mn:0.60～0.90%, P≤0.030%, S≤0.035%, all the other are Fe and inevitable impurity.
Further, described medium carbon cold heading steel rod wire rod, also can contain respective country standard and allow other element adding, as also contained Cr, Mo element, and wherein Cr≤0.20%, Mo≤0.10%, in weight percentage.
Medium carbon cold heading steel rod wire rod of the present invention, as being selected from SWRCH35K steel grade or ML35 steel grade.
In step (1), described heating steel billet carries out in process furnace; Described rolling preferably adopts bar wire rod rolling mill to be rolled.
Excellent wire rod of the present invention comprises bar and wire rod.
In step (2), the cooling rate of described quenching is preferably 0.5-2.0 DEG C/s.
In step (2), wind but to can also first air cooling after 450-550 DEG C to room temperature, then carry out induction heating pre-treatment.
The manufacture method of medium carbon cold heading steel rod wire rod of the present invention, whole Spheroidizing Annealing heat treatment time shortens more than 50%, heat treatment efficiency improves greatly, the medium carbon cold heading steel that obtains rod wire rod there is nodularization rate, hardness and the cold heading performance at least identical with medium carbon cold heading steel rod wire rod after existing long term annealing, met the high requirement of Investment in fastener industry to cold heading steel.
The manufacture method of medium carbon cold heading steel rod wire rod of the present invention, adopt low temperature finish to gauge (700-750 DEG C) and roll rear blowing fast cooling (>=0.5 DEG C/s), obtain the ferritic-pearlitic tissue of grain refining, cooling fast due to low temperature rolling and after rolling, makes energy storage in tissue more (with respect to high-temperature final rolling and roll for the processing method of rear slow cooling).And by quick induction heating short period of time annealing pre-treatment (with 5-15 DEG C/s be warming up to 730-750 DEG C and be incubated 2-3 minute) obtain abundant carbide spheroidization forming core core, for tissue preparation is carried out in follow-up Spheroidizing Annealing thermal treatment.The soaking time of follow-up Spheroidizing Annealing can shorten more than 50%, has improved heat treatment efficiency, has saved the energy, has reduced steel surface decarburization.The hardness of the medium carbon cold heading steel rod wire rod obtaining through preparation method of the present invention is HRB65-70, and 1/3 cold-heading test is not ftractureed; The medium carbon cold heading steel rod wire rod obtaining can be used for 8.8 grades of above high-intensity fasteners, has met the high requirement of fastening piece relevant industries to cold heading steel.
In the manufacture method of medium carbon cold heading steel rod wire rod of the present invention:
Heating and rolling: steel billet heats after 1-2 hour multi-pass rolling on bar wire rod rolling mill and becomes finished steel at the temperature of 950～1050 DEG C, rolled piece accumulative total draft >=75%, finishing temperature is not less than 700 DEG C.Heating makes to organize abundant austenitizing, and carbide is dissolved in matrix completely; Finishing temperature is 700-750 DEG C, and this temperature is at critical temperature A
c1up and down; in this temperature range, complete effectively refine austenite crystal grain or ferritic-pearlitic crystal grain of rolling; make flaky carbide in perlite contain a lot of tiny cracks, low temperature rolling has made rolled piece internal reservoir more energy of deformation, is conducive to the nodularization of follow-up carbide.As shown in table 1 with the rolling of existing cold heading steel contrast technique 1.
Roll rear air-cooled fast: after rolling, blowing is cooling fast immediately, air-cooled cooling rate 0.5 DEG C/more than s, air-cooledly can air cooling to room temperature then enter induction heating pretreatment process to 450-550 DEG C, or air-cooledly after 450-550 DEG C, directly enter induction heating pretreatment process.Air-cooled making can remain to room temperature owing to being out of shape stored energy in rolled piece fast, The more the better.Obtain softening cold heading steel technique with slow cooling and compare, low temperature rolling and fast air-cooled obtain organize more refinement, storage power is more, is conducive to the shortening of follow-up Spheroidizing Annealing time.Compare with high-temperature final rolling and slow cooling or air-cooled cold heading steel, intensity, the hardness of steel of the present invention improve, surface scale even compact, and depth as shallow, surface quality improves.As shown in table 1 with the process for cooling of existing cold heading steel contrast technique 1.
Induction heating pre-treatment: induction heating can accomplish that heat-up rate is fast, the rate of heating of induction heating of the present invention is 5-15 DEG C/s, 20 DEG C of 450-550 from air-cooled DEG C or room temperatures are warming up to 730-750 DEG C and only need tens seconds to 150s at the most, reach temperature required rear insulation 2-3 minute, this activity time is only consuming time is no more than 5.5 minutes, efficiency is very high, and the thermo-efficiency of induction heating is up to 80-85%.Adopt induction heater to carry out short period of time heating and insulation processing, the part, lamellar carbide tiny crack place of rolling state is interrupted rapidly and dissolved and separate out tiny globular carbide forming core core, carried out tissue preparation for follow-up in Spheroidizing Annealing furnace annealing.As shown in table 2 with the induction heating pretreatment technology of existing cold heading steel contrast technique 1.
Spheroidizing Annealing processing: Spheroidizing Annealing can be carried out in conventional annealing stove, but annealing schedule is: be warming up to 760-780 DEG C and be incubated 60-80 minute with stove, then stove be chilled to 680-710 DEG C and be incubated 80-120 minute after the air cooling of coming out of the stove.Follow-up Spheroidizing Annealing can make to dissolve and forming core through the pretreated partly soluble lamellar carbide continuation of induction heating above, the core carbide particle of forming core can continue to grow up before, the carbide forming core that the more traditional Spheroidizing Annealing thermal treatment of final distribution of carbides after two step thermal treatments obtains is more, be more evenly distributed, the nodularization time can significantly shorten; And can reach the nodularization rate at least the same with the cold heading steel of existing long-time Spheroidizing Annealing, meet the high requirement of Investment in fastener industry to cold heading steel.As shown in table 2 with the Spheroidizing Annealing thermal treatment process of existing cold heading steel contrast technique 1.
Rolling, the process for cooling of rolling, process for cooling and existing cold heading steel contrast technique 1 in the manufacturing process of medium carbon cold heading steel rod wire rod of the present invention compare, as shown in table 1:
Table 1
| Finishing temperature (DEG C) | Final cooling temperature (DEG C) | Roll rear rate of cooling (DEG C/s) | |
| The present invention | 700-750 | 450-550 | >=0.5 is air-cooled |
| Contrast technique 1 | 800-900 | 300-400 | 0.01-0.5 slow cooling or 0.5-1.5 are air-cooled |
The present invention by low temperature finish to gauge and roll rear cooling fast, refinement ferritic-pearlitic crystal grain, stored more sex change energy, for follow-up Fast Spheroidizing Annealing has been carried out portion of tissue preparation.
The annealing process of the annealing process in the manufacturing process of medium carbon cold heading steel rod wire rod of the present invention and existing cold-heading rod iron wire rod contrast technique 1 compares, as shown in table 2:
Table 2
The present invention adopts induction heater to carry out short period of time heating and insulation is processed and Spheroidizing Annealing thermal treatment, and the carbide forming core that the more traditional Spheroidizing Annealing thermal treatment of final distribution of carbides is obtained is more, is more evenly distributed, and the nodularization time significantly shortens; And can reach the nodularization rate at least the same with the cold heading steel of existing long-time Spheroidizing Annealing.
Compared with prior art, its beneficial effect is as follows for the manufacture method of medium carbon cold heading steel rod wire rod of the present invention:
The medium carbon cold heading steel rod wire rod that the present invention adopts the annealing processs such as low temperature rolling, fast quenching and induction heating pre-treatment, Spheroidizing Annealing thermal treatment to obtain, its Spheroidizing Annealing time significantly shortens to more than 50%, greatly improve Spheroidizing Annealing efficiency, reduced energy consumption.The hardness of the steel material after Spheroidizing Annealing is HRB65-70, and 1/3 cold-heading test is not ftractureed; Improve the surface quality of material, the medium carbon cold heading steel that obtains has nodularization rate, hardness and the cold heading performance at least identical with medium carbon cold heading steel after existing long term annealing, the medium carbon cold heading steel rod wire rod obtaining can be used for 8.8 grades of above high-intensity fasteners, has met the high requirement of Investment in fastener industry.
Brief description of the drawings
Fig. 1 is the pretreated picture of organizing of the embodiment of the present invention 1 induction heating;
Fig. 2 is the picture of organizing after the embodiment of the present invention 1 Spheroidizing Annealing;
Fig. 3 is the pretreated pictures of organizing of the embodiment of the present invention 6 induction heating;
Fig. 4 is the picture of organizing after the embodiment of the present invention 6 Spheroidizing Annealings;
Fig. 5 is that the state of rolling of contrast technique 2 is organized picture
Fig. 6 be contrast technique 2 Spheroidizing Annealing after organize picture;
Fig. 7 is that the state of rolling of contrast technique 3 is organized picture;
Fig. 8 is that the Spheroidizing Annealing state of contrast technique 3 is organized picture.
Embodiment
Below by specific embodiment, the present invention is described further, should be clear and definite, and embodiment only, for the description to optimal way of the present invention, does not limit the scope of the invention.
Embodiment
The steel billet of medium carbon cold heading steel (SWRCH35K steel grade) is heated to 1-2 hour at the temperature of 950-1050 DEG C, and then on bar wire rod rolling mill, multi-pass rolling becomes excellent wire rod.Excellent wire rod after rolling adopts air-cooled cooling and air cooling fast to room temperature.After quick induction heating pre-treatment and Spheroidizing Annealing thermal treatment, obtain again the medium carbon cold heading steel of each embodiment.Rolling wherein, roll rear air-cooled, quick induction heating pre-treatment and the heat treated concrete technology parameter of Spheroidizing Annealing as shown in table 3.
Comparative example
The steel billet of the medium carbon cold heading steel (SWRCH35K steel grade) of contrast technique 2 and 3 heats 1-2 hour at the temperature of 950-1050 DEG C, and then on bar wire rod rolling mill, multi-pass rolling becomes excellent wire rod.Excellent wire rod after rolling adopts and is less than the air cooling of 0.5 DEG C/s or quenching at a slow speed.After finally adopting Spheroidizing Annealing thermal treatment, obtain the medium carbon cold heading steel that contrasts technique 2 and 3.Rolling wherein, roll rear air-cooled and the heat treated concrete technology parameter of Spheroidizing Annealing is as shown in table 3.
Table 3
Organize photo Fig. 1 and Fig. 3 from the rear pre-treatment state of the low temperature finish to gauge of embodiment 1 and 6+roll, through low temperature finish to gauge and the pretreated medium carbon cold heading steel rod of induction heating wire rod, its pearlitic structure has obviously been degenerated, the pearlitic synusia overwhelming majority is interrupted, form tiny particulate state cementite, carried out tissue for follow-up Spheroidizing Annealing and prepared.From contrast technique 2 and 3 roll state organization chart 5 and Fig. 7, its pearlitic structure great majority be lamellar, and relatively thick, are unfavorable for follow-up Spheroidizing Annealing, this is also that contrast technique 2 Spheroidizing Annealings need the reasons that be incubated for a long time.Nodularization of cementite great majority in organization chart 2 after embodiment 1 and 6 Spheroidizing Annealings and Fig. 4, and distribution disperse; Spherodized structure Fig. 6 and the obvious nodularization rate of Fig. 8 of contrast technique 2 and 3 are on the low side, especially contrast spherodized structure Fig. 8 of technique 3, and owing to being high-temperature final rolling, and nodularization thermal treatment soaking time only has 4 hours, therefore nodularization rate is more much lower than embodiment 1-6.
From embodiment 1-6 and and the contrast of the contrast technique 2 and 3 of comparative example can find out, adopt the medium carbon cold heading steel (SWRCH35K steel grade) obtaining after low temperature rolling of the present invention, fast air-cooled, quick induction heating pre-treatment and Spheroidizing Annealing thermal treatment, there is the better or similar spherodized structure of medium carbon cold heading steel (SWRCH35K steel grade) obtaining than long-time (11 hours) Spheroidizing Annealing of existing technique; Than existing technique short period of time (4 hours) spherodized structure that Spheroidizing Annealing nodularization rate is higher.
The medium carbon cold heading steel rod wire rod of embodiment 1-6 all adopts low temperature rolling and air-cooled fast, and through induction heating short period of time are incubated as Spheroidizing Annealing pre-treatment fast, with the rolling of existing medium carbon cold heading steel, coolingly compare with the typical process (contrast technique 2) of Spheroidizing Annealing, annealing time shortens more than 50%, and organizing after the nodularization obtaining is better or similar compared with the prior art.Medium carbon cold heading steel material hardness after Spheroidizing Annealing is HRB65-70, and 1/3 cold-heading test is not ftractureed.From embodiment 1-6, adopt after low temperature rolling of the present invention, fast quenching and annealing process (induction heating pre-treatment and Spheroidizing Annealing thermal treatment fast), greatly improve Spheroidizing Annealing efficiency, save the time, reduced energy consumption, and microstructure and hardness after nodularization meets cold-heading demand and the high requirement of Investment in fastener industry to medium carbon cold heading steel.
Claims (6)
1. a manufacture method for medium carbon cold heading steel rod wire rod, comprises the steps:
(1) heating and rolling
First by the steel billet of medium carbon cold heading steel at 950-1050 DEG C of heating 1-2 hour, then carry out multi-pass rolling and obtain excellent wire rod, finishing temperature is 700-750 DEG C, rolled piece accumulative total draft >=75%;
(2) roll rear air-cooled fast
Excellent wire rod after rolling is air-cooled to 450-550 DEG C with the cooling rate of >=0.5 DEG C/s;
(3) induction heating pre-treatment
Cooled excellent wire rod enters in quick induction heater with the speed of 5-15 DEG C/s and is warming up to 730-750 DEG C and be incubated 2-3 minute;
(4) Spheroidizing Annealing thermal treatment
The pretreated excellent wire rod of induction heating enters and in spheroidizing annealing furnace, carries out Spheroidizing Annealing thermal treatment, first be warming up to 760-780 DEG C and be incubated 60-80 minute with stove, be cooled to again 680-710 DEG C and be incubated 80-120 minute after the air cooling of coming out of the stove, obtain medium carbon cold heading steel rod wire rod.
2. the manufacture method of medium carbon cold heading steel rod wire rod as claimed in claim 1, it is characterized in that, the chemical component weight percentage composition of described medium carbon cold heading steel rod wire rod is: C:0.32～0.38%, Si:0.10～0.35%, Mn:0.60～0.90%, P≤0.030%, S≤0.035%, all the other are Fe and inevitable impurity.
3. the manufacture method of medium carbon cold heading steel rod wire rod as claimed in claim 2, is characterized in that, described medium carbon cold heading steel rod wire rod, also contains Cr, Mo element, wherein Cr≤0.20%, and Mo≤0.10%, by weight percentage.
4. the manufacture method of medium carbon cold heading steel rod wire rod as claimed in claim 1, is characterized in that, in step (1), described rolling preferably adopts bar wire rod rolling mill to be rolled.
5. the manufacture method of medium carbon cold heading steel as claimed in claim 1, is characterized in that, in step (2), the cooling rate of described quenching is preferably 0.5-2.0 DEG C/s.
6. the manufacture method of the medium carbon cold heading steel rod wire rod as described in as arbitrary in claim 1-5, is characterized in that, in step (2), air-cooled to first air cooling after 450-550 DEG C to room temperature, then carries out induction heating pre-treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310027491.4A CN103966411B (en) | 2013-01-24 | 2013-01-24 | A kind of manufacture method of medium carbon cold heading steel Bar Wire Product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310027491.4A CN103966411B (en) | 2013-01-24 | 2013-01-24 | A kind of manufacture method of medium carbon cold heading steel Bar Wire Product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103966411A true CN103966411A (en) | 2014-08-06 |
| CN103966411B CN103966411B (en) | 2016-07-27 |
Family
ID=51236411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310027491.4A Active CN103966411B (en) | 2013-01-24 | 2013-01-24 | A kind of manufacture method of medium carbon cold heading steel Bar Wire Product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103966411B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313281A (en) * | 2014-09-30 | 2015-01-28 | 东莞市科力钢铁线材有限公司 | Process for producing high-nodularity fastener wire rod |
| CN107746932A (en) * | 2017-12-06 | 2018-03-02 | 东北大学 | A kind of preparation method of GCr15 bearing steels |
| CN108531815A (en) * | 2018-05-24 | 2018-09-14 | 本钢板材股份有限公司 | High temperature bolt steel BG25Cr2MoVA and preparation method thereof |
| CN109136757A (en) * | 2018-09-05 | 2019-01-04 | 包头钢铁（集团）有限责任公司 | The production method of medium carbon cold heading steel wire rod and medium carbon cold heading steel wire rod |
| CN109182680A (en) * | 2018-11-19 | 2019-01-11 | 攀钢集团江油长城特殊钢有限公司 | A kind of control method of the cold-heading annealing hardness of martensitic stain less steel Bar Wire Product |
| CN109306432A (en) * | 2018-11-13 | 2019-02-05 | 湖南华菱涟源钢铁有限公司 | A kind of bimetal saw blade backing cold-strip steel and its manufacturing method |
| CN112195322A (en) * | 2020-08-10 | 2021-01-08 | 杭州杭申节能炉窑有限公司 | Zero-decarburization spheroidizing annealing heating process for cold forging steel SWCH35K |
| CN113789478A (en) * | 2021-09-16 | 2021-12-14 | 湖南华菱湘潭钢铁有限公司 | Production method of cold heading steel bar |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1256320A (en) * | 1999-04-30 | 2000-06-14 | 吴凡 | Carbide annealing process for high-speed great-deformation hot-rolled and cold-upset steel |
| CN1752225A (en) * | 2004-09-22 | 2006-03-29 | 杨东佐 | Production method and device of removing internal stess of steel wire for cold upsetting |
| CN102560253A (en) * | 2012-03-13 | 2012-07-11 | 南京钢铁股份有限公司 | Manufacturing method of high-quality cold heading steel with uniform structure property |
-
2013
- 2013-01-24 CN CN201310027491.4A patent/CN103966411B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1256320A (en) * | 1999-04-30 | 2000-06-14 | 吴凡 | Carbide annealing process for high-speed great-deformation hot-rolled and cold-upset steel |
| CN1752225A (en) * | 2004-09-22 | 2006-03-29 | 杨东佐 | Production method and device of removing internal stess of steel wire for cold upsetting |
| CN102560253A (en) * | 2012-03-13 | 2012-07-11 | 南京钢铁股份有限公司 | Manufacturing method of high-quality cold heading steel with uniform structure property |
Non-Patent Citations (1)
| Title |
|---|
| 赵贤平等: "SCM435冷镦钢线材球化退火工艺探讨", 《金属制品》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313281A (en) * | 2014-09-30 | 2015-01-28 | 东莞市科力钢铁线材有限公司 | Process for producing high-nodularity fastener wire rod |
| CN104313281B (en) * | 2014-09-30 | 2016-09-14 | 东莞市科力钢铁线材有限公司 | A kind of production technology of high Oxygen potential fastener wire |
| CN107746932A (en) * | 2017-12-06 | 2018-03-02 | 东北大学 | A kind of preparation method of GCr15 bearing steels |
| CN107746932B (en) * | 2017-12-06 | 2019-10-01 | 东北大学 | A kind of preparation method of GCr15 bearing steel |
| CN108531815A (en) * | 2018-05-24 | 2018-09-14 | 本钢板材股份有限公司 | High temperature bolt steel BG25Cr2MoVA and preparation method thereof |
| CN109136757A (en) * | 2018-09-05 | 2019-01-04 | 包头钢铁（集团）有限责任公司 | The production method of medium carbon cold heading steel wire rod and medium carbon cold heading steel wire rod |
| CN109136757B (en) * | 2018-09-05 | 2020-10-27 | 包头钢铁（集团）有限责任公司 | Production method of medium-carbon cold heading steel wire and medium-carbon cold heading steel wire |
| CN109306432A (en) * | 2018-11-13 | 2019-02-05 | 湖南华菱涟源钢铁有限公司 | A kind of bimetal saw blade backing cold-strip steel and its manufacturing method |
| CN109182680A (en) * | 2018-11-19 | 2019-01-11 | 攀钢集团江油长城特殊钢有限公司 | A kind of control method of the cold-heading annealing hardness of martensitic stain less steel Bar Wire Product |
| CN109182680B (en) * | 2018-11-19 | 2020-06-16 | 攀钢集团江油长城特殊钢有限公司 | Method for controlling annealing hardness of martensitic stainless steel rod wire for cold heading |
| CN112195322A (en) * | 2020-08-10 | 2021-01-08 | 杭州杭申节能炉窑有限公司 | Zero-decarburization spheroidizing annealing heating process for cold forging steel SWCH35K |
| CN113789478A (en) * | 2021-09-16 | 2021-12-14 | 湖南华菱湘潭钢铁有限公司 | Production method of cold heading steel bar |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103966411B (en) | 2016-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103966411A (en) | Manufacturing method for medium-carbon cold forging steel rods and wires | |
| CN105112774B (en) | The air-cooled hardening spring steel of the low middle carbon microalloy of high-strength tenacity and its shaping and Technology for Heating Processing | |
| CN103849746A (en) | Thermal treatment process for 40CrNiMoA core rod and 40CrNiMoA core rod obtained through process | |
| CN102433502A (en) | Spheroidized annealing technology for GCr15 bearing steel | |
| CN108441615B (en) | Hardening and tempering method of 12Cr13 stainless steel bar | |
| CN103343200A (en) | Short-process thermal treatment method of large 35CrNi3MoV steel forgings | |
| CN102719643B (en) | Heat processing technology of high-carbon carbon steel coil rod for steel wire rope | |
| CN105886717B (en) | A kind of residual forging heat normalizing method of steel | |
| CN103333997A (en) | Annealing heat treatment method of H13 die steel | |
| CN103966409A (en) | Manufacturing method for medium chrome ferrite stainless steel | |
| CN108441765A (en) | A kind of cold-rolled transformation induced plasticity and preparation method thereof | |
| CN104451452B (en) | A kind of bearing steel for wind power equipment and preparation method thereof | |
| CN104593573A (en) | Combined thermomechanical treatment strengthening method for efficiently improving strength and toughness of non-quenched and tempered steel | |
| CN101591727B (en) | Heat treatment method for low-carbon alloy steel forging blank | |
| CN106480372A (en) | A kind of 8.8 grades of securing members non-quenched cold heading steel wire rod and its production methods | |
| CN106480373A (en) | A kind of 9.8 grades of securing members non-quenched cold heading steel wire rod and its production methods | |
| CN105525222B (en) | A kind of energy-efficient Steel for cold heading processing gren rod and its production method | |
| CN103484764B (en) | Ti precipitation strength type superhigh-strength hot rolls thin plate and production method thereof | |
| CN106086360A (en) | A kind of heat treatment method of Industrial Steam Turbine Rotors Aided forging | |
| CN103981447B (en) | A kind of low cost is without Mo plastic die steel steel plate and production technique thereof | |
| CN103572013B (en) | A kind of Spheroidizing Annealing method of 40Cr steel | |
| CN103320686B (en) | Cold rolled sheet No. 45 steel and production method thereof | |
| CN105838855B (en) | Expand hydrogen annealing process after a kind of forging of steel forgings containing Chrome high Nickel alloys | |
| CN105018712A (en) | Spheroidizing annealing process of superplastic medium carbon steel wire | |
| CN109628833B (en) | Cr-Mo-Si-V cold-work die steel and preparation method thereof |
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 |