CN104593580A - Method for preventing annealing carburization of high-speed tool steel cold-drawn steel wire - Google Patents
Method for preventing annealing carburization of high-speed tool steel cold-drawn steel wire Download PDFInfo
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- CN104593580A CN104593580A CN201410813194.7A CN201410813194A CN104593580A CN 104593580 A CN104593580 A CN 104593580A CN 201410813194 A CN201410813194 A CN 201410813194A CN 104593580 A CN104593580 A CN 104593580A
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- annealing
- tool steel
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- rapid tool
- drawn wire
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention relates to a method for preventing annealing carburization of a high-speed tool steel cold-drawn steel wire. The method comprises the following steps: in a temperature rise period of an annealing process of a high-speed tool steel cold-drawn steel wire, heating the high-speed tool steel cold-drawn steel wire to obtain wire drawing powder, burning and decomposing the wire drawing powder to ensure that the temperature of the wire drawing powder is lower than the rapid oxidation temperature of the high-speed steel cold-drawn steel wire, and then annealing the high-speed tool steel cold-drawn steel wire after flue gas produced by burning and decomposing the wire drawing powder is discharged. According the technical scheme disclosed by the invention, the high-speed tool steel cold-drawn steel wire only needs to be directly fed into an annealing furnace, the wire drawing powder on the surface of the steel wire is heated to be burnt and decomposed before reaching the annealing temperature, and then the wire drawing powder is subjected to gas discharge and ignition treatment. The method disclosed by the invention is simple to operate, ensures that the cost can be saved and the production cycle can be shortened, and has practical application values.
Description
Technical field
The present invention relates to a kind of method preventing wire annealing carburizing, particularly relate to a kind of method preventing rapid tool steel drawn wire annealing carburizing.
Background technology
Rapid tool steel drawn wire adopts rapid tool steel gren rod through being drawn into steel wire, and steel wire is again after Full Annealing, and one is delivered goods with vertical bar shape after being through aligning, scale; Another kind is delivering goods with plate-like of not aligning.Drawn wire processes on cold-drawn machine, and in cold drawing process, steel wire needs lubrication in a mold, and the lubricant of drawing is generally made up of carbon dust, soap powder, butter etc. also referred to as " hot candied powder ".Cold drawn go out Steel Wire Surface adhere to the hot candied powder of these carbonaceous organic materials, steel wire with hot candied powder carries out high temperature annealing in annealing furnace, produces carburizing atmosphere, cause the carburizing of wire annealing rear surface in stove, carburized wire not only very easily ruptures in follow-up processing, and the cutter produced is scrapped.
In order to prevent steel wire carburizing, physical removal, chemical scavenging or method that both combine generally are adopted to the cleaning of hot candied powder.Physical removal method comprise surperficial sand washing carried out to steel wire, scrub, the process such as polishing, as usually adopted 3 wire wheel brushes, becoming 120 degree of thick brushes that distribute, then carrying out essence by 3 groups of sized flap wheels and throwing and process, or carrying out polished finish by high speed planet polishing machine; Chemical scavenging method comprises the treatment process successively combining cleaning with pickling, alkali cleaning or soda acid.There is the deficiency increasing operation, extend manufacture cycle in such process.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides a kind for the treatment of process simple, the method preventing rapid tool steel drawn wire annealing carburizing of production cycle can be shortened.
For achieving the above object, the method preventing rapid tool steel drawn wire annealing carburizing of the present invention, be rapid tool steel drawn wire annealing in the temperature rise period, rapid tool steel drawn wire is heated to hot candied powder combustion decomposition and lower than the fast oxidative temperature of rapid steel drawn wire, after the flue gas releasing that hot candied powder combustion decomposition is formed, carry out the annealing of rapid tool steel drawn wire.
Based on conventional hot candied powder by carbon dust, soap powder, the material compositions such as butter, at the temperature-rise period of wire annealing, first the hot candied powder of Steel Wire Surface can be formed flue gas by heating flame, control temperature makes hot candied powder obtain fast, sufficient combustion decomposition, again the flue gas formed is discharged, solve the carburizing atmosphere that flue gas is formed in annealing pot, thus in the annealing carburizing problem that the hot candied powder fundamentally solving Steel Wire Surface causes, and control Heating temperature can make the quick Thorough combustion of hot candied pruinescence decompose, also the oxidation of rapid tool steel drawn wire can be avoided, make not affect follow-up wire annealing process treatment stage of this.The mode of hot candied powder is processed compared to other, adopt which process rapid tool steel drawn steel wire, do not need the cleaning production line through hot candied powder, directly can process in annealing furnace, anneal, this treatment process shortens the production cycle, saved production cost, and operation is simple, be convenient to application, fundamentally solve the annealing carburizing problem that hot candied powder causes.
As the restriction to aforesaid way, described hot candied powder combustion decomposition temperature is 650 ~ 750 DEG C.
Selected 650 ~ 750 DEG C, insulation, makes hot candied powder heated combustion form flue gas, and combustion decomposition is fast at this temperature for hot candied powder on the one hand, reduces hot candied powder and removes the time used in stage, can shorten whole time production cycle; On the other hand at this temperature, rapid tool steel steel wire does not reach Quick Oxidation temperature, and it is oxidized that the discharging operation of flue gas can not have influence on Steel Wire Surface; Again on the one hand at this temperature can preheating steel wire, improve steel wire heat speed, be beneficial to carrying out rapidly of subsequent anneal.
As the restriction to aforesaid way, described in prevent the anneal method of carburizing of rapid tool steel drawn wire from comprising the following steps:
A, directly to install to the rapid tool steel drawn steel wire after cold-drawn in well formula electricity annealing furnace annealing pot in, cover annealing cover, after being heated to hot candied powder combustion decomposition temperature, insulation, makes hot candied powder burn and forms flue gas;
B, the venting hole covered by annealing pot are opened, and release the flue gas that hot candied powder combustion decomposition is formed, and are lighted by flue gas, until when flue gas flare extinguishes, the venting hole sealing covered by annealing pot, builds annealing furnace outer cover;
C, continuation intensification, insulation, slow cooling, complete annealing process.
In concrete treating processes, flue gas is released by the venting hole covered by opening annealing pot, and is lighted by flue gas, prevent from forming carburizing atmosphere, treat that flue gas flare extinguishes, the venting hole sealing that annealing pot is covered, build annealing furnace outer cover, then continue intensification and carry out subsequent anneal process.
As the restriction to aforesaid way, in described step a, soaking time is 1 ~ 2h.
The hot candied powder combustion decomposition time is relevant with batch and charging mode, holds time short during the little or employing bin of batch; Otherwise length of holding time, general soaking time is 1 ~ 2 hour.
As the restriction to aforesaid way, in described step b, the venting hole that annealing pot covers is adopted fire-resistant asbestos seal and adopt dry cement be placed on annealing cover and annealing pot mouth place sealing groove in seal.
As the restriction to aforesaid way, described step c is warming up to 850 ~ 860 DEG C, insulation 3 ~ 4h, and steel wire completes structural transformation, with slow cooling speed≤30 DEG C/h be cooled to≤500 DEG C, annealing pot is come out of the stove into burial pit.
Carry out the annealing of rapid tool steel drawn steel wire by setting technological operation after hot candied powder removal.
In sum, adopt technical scheme of the present invention to prevent the annealing carburizing of rapid tool steel drawn steel wire, do not need the cleaning process carrying out Steel Wire Surface drawing powder, directly rapid tool steel drawn steel wire is loaded in annealing furnace, before reaching annealing temperature, heating is carried out to the hot candied powder of Steel Wire Surface and make its combustion decomposition, again process is lighted in flue gas venting, simple to operate, not only cost-saving, and shorten the production cycle, there is actual application value, fundamentally solve the annealing carburizing problem that hot candied powder causes.
Accompanying drawing explanation
Do further to describe in detail to the present invention below in conjunction with the drawings and the specific embodiments:
Fig. 1: rapid tool steel cold-drawn wire annealing furnace structure schematic diagram;
Fig. 2: the process curve preventing rapid tool steel cold-drawn wire annealing carburizing;
In Fig. 1: 1, venting hole; 2, annealing cover; 3, annealing furnace outer cover; 4, annealing pot; 5, annealing body of heater;
In Fig. 2: T1, hot candied powder temperature of combustion; T2, annealing temperature; T1, hot candied powder combustion time; T2, annealing soaking time.
Embodiment
Rapid tool steel cold-drawn wire is carried out removing hot candied powder and anneal in well formula electricity annealing furnace.As shown in Figure 1, this well formula electricity annealing furnace comprises the annealing body of heater 5, the annealing furnace outer cover 3 that are positioned at inner annealing pot 4, annealing cover 2 and are positioned at outside, and annealing cover 2 has venting hole 1.
Embodiment one
The present embodiment is related to the operating process preventing rapid tool steel drawn wire annealing carburizing, the process curve preventing rapid tool steel cold-drawn wire annealing carburizing shown in composition graphs 2, and concrete operations comprise the following steps:
A, the annealing pot 4 li be encased in by rapid tool steel drawn wire in well formula electricity annealing body of heater 5, cover annealing cover 2, be warming up to hot candied powder temperature of combustion T1, soaking time t1, make hot candied powder heated combustion be fully formed flue gas;
B, the venting hole 1 covered by annealing pot are opened, release the flue gas that the burning of hot candied powder is formed, and flue gas is lighted, until flue gas flare extinguishes, the venting hole 1 covered by annealing pot adopts fire-resistant asbestos seal and adopts dry cement to be placed in annealing cover 2 and annealing pot mouth place sealing groove and seals, and builds annealing furnace outer cover 3;
C, continue to be warming up to annealing temperature T2, soaking time t2, carry out the structural transformation of steel wire, with slow cooling speed≤30 DEG C/h be cooled to≤500 DEG C, annealing pot is come out of the stove into burial pit, completes annealing operation.
Embodiment two
The present embodiment relates to different rapid tool steel steel wire and is preventing the operating parameters of annealing in carburization step and the product result obtained, shown in table specific as follows:
The wire annealing Hardness Control of three groups of embodiment process is at≤239HB as shown above, meet the requirement of state scale value≤255HB, the loose bundle of cold-drawn wire compared to routine, physics or chemical process cleaning, the conventional annealing operation cycle is 24 ~ 36h, this method substantially reduces the production cycle, decrease operation sequence, cost-saving.
Claims (6)
1. one kind prevents the method for rapid tool steel drawn wire annealing carburizing, it is characterized in that: the temperature rise period in the annealing of rapid tool steel drawn wire, rapid tool steel drawn wire is heated to hot candied powder combustion decomposition and lower than the fast oxidative temperature of rapid steel drawn wire, after the flue gas releasing that hot candied powder combustion decomposition is formed, carry out the annealing of rapid tool steel drawn wire.
2. the method preventing rapid tool steel drawn wire annealing carburizing according to claim 1, is characterized in that: described hot candied powder combustion decomposition temperature is 650 ~ 750 DEG C.
3. the method preventing rapid tool steel drawn wire annealing carburizing according to claim 1 and 2, it is characterized in that, the method comprises the following steps:
A, directly to install to the rapid tool steel drawn steel wire after cold-drawn in well formula electricity annealing furnace annealing pot in, cover annealing cover, after being heated to hot candied powder combustion decomposition temperature, insulation, makes hot candied powder Thorough combustion form flue gas;
B, the venting hole covered by annealing pot are opened, and release the flue gas that hot candied powder combustion decomposition is formed, and are lighted by flue gas, until when flue gas flare extinguishes, the venting hole sealing covered by annealing pot, builds annealing furnace outer cover;
C, continuation intensification, insulation, slow cooling, complete annealing process.
4. the method preventing rapid tool steel drawn wire annealing carburizing according to claim 3, is characterized in that: in step a, soaking time is 1 ~ 2h.
5. the rapid tool steel drawn wire that prevents according to claim 3 is annealed the method for carburizing, it is characterized in that: in step b, the venting hole that annealing pot covers is adopted fire-resistant asbestos seal and adopt dry cement to be placed in annealing cover and annealing pot mouth place sealing groove and seal.
6. the method preventing rapid tool steel drawn wire annealing carburizing according to claim 3, it is characterized in that: step c is warming up to 850 ~ 860 DEG C, insulation 3 ~ 4h, steel wire completes structural transformation, with slow cooling speed≤30 DEG C/h be cooled to≤500 DEG C, annealing pot is come out of the stove into burial pit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410813194.7A CN104593580B (en) | 2014-12-24 | 2014-12-24 | Method for preventing annealing carburization of high-speed tool steel cold-drawn steel wire |
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| CN201410813194.7A CN104593580B (en) | 2014-12-24 | 2014-12-24 | Method for preventing annealing carburization of high-speed tool steel cold-drawn steel wire |
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| CN104593580A true CN104593580A (en) | 2015-05-06 |
| CN104593580B CN104593580B (en) | 2017-05-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112080627A (en) * | 2020-07-18 | 2020-12-15 | 凯明(常州)新材料科技有限公司 | Recrystallization annealing process of GCr15 bearing steel wire well type annealing furnace |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101205590A (en) * | 2006-12-20 | 2008-06-25 | 宝山钢铁股份有限公司 | Annealing method for high-speed steel cold-drawing wire products |
| CN101992221A (en) * | 2009-08-14 | 2011-03-30 | 江苏宏泰不锈钢丝绳有限公司 | Stainless steel wire on-line coating and drawing production process |
| CN102755992A (en) * | 2012-07-30 | 2012-10-31 | 武汉钢铁(集团)公司 | Production method of cold-rolled steel strip for flux cored wire |
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- 2014-12-24 CN CN201410813194.7A patent/CN104593580B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101205590A (en) * | 2006-12-20 | 2008-06-25 | 宝山钢铁股份有限公司 | Annealing method for high-speed steel cold-drawing wire products |
| CN101992221A (en) * | 2009-08-14 | 2011-03-30 | 江苏宏泰不锈钢丝绳有限公司 | Stainless steel wire on-line coating and drawing production process |
| CN102755992A (en) * | 2012-07-30 | 2012-10-31 | 武汉钢铁(集团)公司 | Production method of cold-rolled steel strip for flux cored wire |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112080627A (en) * | 2020-07-18 | 2020-12-15 | 凯明(常州)新材料科技有限公司 | Recrystallization annealing process of GCr15 bearing steel wire well type annealing furnace |
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| CN104593580B (en) | 2017-05-03 |
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