CN114653749B - Processing method of steel belt for automobile safety belt coil spring - Google Patents
Processing method of steel belt for automobile safety belt coil spring Download PDFInfo
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- CN114653749B CN114653749B CN202210299988.0A CN202210299988A CN114653749B CN 114653749 B CN114653749 B CN 114653749B CN 202210299988 A CN202210299988 A CN 202210299988A CN 114653749 B CN114653749 B CN 114653749B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 120
- 239000010959 steel Substances 0.000 title claims abstract description 120
- 238000003672 processing method Methods 0.000 title claims description 6
- 238000010791 quenching Methods 0.000 claims abstract description 195
- 230000000171 quenching effect Effects 0.000 claims abstract description 193
- 239000007788 liquid Substances 0.000 claims abstract description 67
- 239000002245 particle Substances 0.000 claims abstract description 37
- 230000001737 promoting effect Effects 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 22
- 239000003507 refrigerant Substances 0.000 claims abstract description 20
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 238000011049 filling Methods 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 147
- 238000001816 cooling Methods 0.000 claims description 28
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 20
- 238000002360 preparation method Methods 0.000 claims description 15
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 14
- 239000010724 circulating oil Substances 0.000 claims description 12
- 238000005192 partition Methods 0.000 claims description 12
- 238000005498 polishing Methods 0.000 claims description 12
- 238000009835 boiling Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 11
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 10
- 239000001110 calcium chloride Substances 0.000 claims description 10
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 239000001103 potassium chloride Substances 0.000 claims description 10
- 235000011164 potassium chloride Nutrition 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 9
- 239000006188 syrup Substances 0.000 claims description 9
- 235000020357 syrup Nutrition 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 238000005554 pickling Methods 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- 239000011780 sodium chloride Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 6
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 5
- 229930006000 Sucrose Natural products 0.000 claims description 5
- 229960004793 sucrose Drugs 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 239000005720 sucrose Substances 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 210000005056 cell body Anatomy 0.000 abstract 3
- 230000000052 comparative effect Effects 0.000 description 13
- 239000008188 pellet Substances 0.000 description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000003679 aging effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
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- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000005382 thermal cycling Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
- B21B2015/0021—Cutting or shearing the product in the rolling direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The application relates to a quenching tank for producing a coil spring of an automobile safety belt and a quenching process thereof. The utility model provides an automobile safety belt coil spring production is with quenching groove includes the cell body, be provided with in the cell body and be used for separating into the cell body along belted steel conduction direction in proper order first secondary oil groove, second secondary oil groove and the baffle of third secondary oil groove, the hole that flows has been seted up on the baffle, install on the baffle and be used for filtering the filtration piece that flows through the quenching medium in hole that flows. A quenching process for a coil spring of an automobile safety belt by using the quenching tank comprises the following steps: s1: filling a quenching medium into the diversion cavity, and filling a mixed liquid of the refrigerant promoting particles and the quenching medium into the feeding cavity; s2: and guiding the strip steel to be quenched into a quenching tank body, and sequentially passing through a first secondary oil tank, a quenching auxiliary mechanism in the first secondary oil tank, a second secondary oil tank and a third secondary oil tank, wherein the speed is controlled to be 1-2m/min. The quenching method has the effect of improving the quenching quality of the strip steel.
Description
Technical Field
The application relates to the field of coil spring quenching, in particular to a method for processing a steel belt for an automobile safety belt coil spring.
Background
The safety belt coil spring is an important part on an automobile safety belt and is an important factor for determining the performance of a safety belt retractor. The safety belt coil spring is obtained by processing a spring steel strip, and the quality of the raw material has great influence on the quality of the safety belt coil spring.
The coil spring is produced by the steps of strip dividing, edge grinding, heat treatment, bending, coiling, bending, heating, banding, packaging and the like of the strip steel in sequence. The heat treatment process mainly comprises quenching and tempering, wherein the steel strip passing through the heating furnace needs to be cooled by a quenching medium during quenching, and the quenching medium usually adopts quenching oil.
In view of the above-mentioned related technologies, the inventor believes that the quenching oil is often subjected to high temperature, oxygen and metal catalysis during the process of cooling high-temperature metal, and after a period of time, part of the quenching oil is oxidized and aged, so that the cooling capacity and cooling stability of the quenching oil are deteriorated, thereby affecting the quenching effect of the strip steel.
Disclosure of Invention
In order to improve the cooling capacity and cooling stability of quenching oil in the using process, the application provides a processing method of a steel belt for a coil spring of an automobile safety belt, which adopts the following technical scheme:
a processing method of a steel belt for a coil spring of an automobile safety belt is characterized by comprising the following steps:
s1: pickling, namely pickling the raw material steel strip;
s2: shearing, namely shearing the pickled steel strip to obtain the steel strip with the width 30-40 times that of the finished steel strip;
s3: polishing, namely polishing the sheared strip steel;
s4: quenching, namely guiding the strip steel into a quenching furnace to be heated to 800-980 ℃, and then guiding the strip steel into a quenching tank to be cooled by quenching medium;
s5: polishing, polishing the quenched strip steel; s6:
rolling, rolling the polished strip steel;
s7: splitting, namely longitudinally dividing the rolled strip steel into a plurality of steel strips with the width equal to that of the safety belt coil spring;
s8: pressing edges, namely pressing the edges of the steel strips after splitting to remove burrs on the edges of the steel strips;
the quenching tank adopted in the quenching in the step S4 comprises a tank body, wherein a partition plate used for sequentially dividing the tank body into a first secondary oil tank, a second secondary oil tank and a third secondary oil tank along the conduction direction of the strip steel is arranged in the tank body, a through hole for the strip steel to pass through and a flow hole for circulating a quenching medium are formed in the partition plate, and a filtering piece used for filtering the quenching medium flowing through the flow hole is arranged on the partition plate;
the quenching device is characterized in that a circulating oil tank is arranged outside the tank body, an oil inlet pipe for leading quenching media into the circulating oil tank and an oil outlet pipe for leading the quenching media out of the circulating oil tank are connected to the circulating oil tank, the oil inlet pipe is communicated with the first secondary oil tank, the oil outlet pipe is communicated with the third secondary oil tank, and pump bodies are arranged on the oil outlet pipe and the oil inlet pipe.
By adopting the technical scheme, the quenching tank is divided into the first secondary oil tank, the second secondary oil tank and the third secondary oil tank according to three stages of quenching, namely a steam film stage, a boiling stage and a convection stage. Because of the thermal cycling of the three stages of quenching and the attendant side reactions and their extent, the quench oil in the three secondary oil baths is oxidized or catalytically aged to varying degrees during the long-term quenching. The instantaneous heat in the steam film stage is high, a steam film is formed, and the local generation of asphaltene is the most; in the boiling stage, the cooling is fastest, and the quenching oil absorbs more heat and is aged more. After the quenching oil is arranged separately, the phenomenon that asphaltene flows into the quenching oil in the boiling stage due to convection between the quenching oil, for example, the heat transfer of the strip steel in the boiling stage is blocked, and the quenching quality is influenced can be avoided.
And the quenching oil can achieve the purpose of circular updating through the structures of the flow holes, the filtering pieces, the circulating oil tank and the like, and impurities in each secondary oil tank can be basically intercepted by the filtering pieces when flowing through the flow holes, so that mutual influence among the secondary oil tanks is avoided. This application is still through the direction that guides quenching oil from third secondary oil groove to first secondary oil groove and circulates, because quenching oil in the third secondary oil groove absorbs the heat minimum relatively, quenching oil is cleaner to make quenching oil can obtain utilizing by a bigger degree.
Preferably, the filter member includes filter screens disposed at both sides of the flow hole, and a flow fan for guiding the flow of the quenching medium is installed between the two filter screens.
Through adopting above-mentioned technical scheme, the fan that flows is leading-in the oil groove of opposite side with the quenching oil from the oil groove of one side when rotating to the quenching oil is filtered by the filter screen when the process, in order to avoid impurity to get into adjacent oil groove along with, in order to reach circulation quenching oil and be difficult for bringing into the effect of different oil grooves with impurity.
Preferably, a quenching auxiliary mechanism is installed in the first secondary oil groove, the quenching auxiliary mechanism comprises a base plate, a first guide hole for a steel belt to pass through is formed in the base plate, a flow guide cavity surrounding the first guide hole is formed in the base plate, and a blocking plate for blocking an annular passage of the flow guide cavity is arranged in the flow guide cavity; the base plate is provided with a liquid inlet port and a liquid outlet port, the liquid inlet port and the liquid outlet port are both communicated with the diversion cavity, and the liquid inlet port and the liquid outlet port are respectively positioned on one side of the blocking plate;
a plurality of vortex holes communicated with the flow guide cavity are uniformly formed in the hole wall of the first guide hole, a plurality of driving shafts with axes coinciding with the axes of the vortex holes in a one-to-one correspondence mode are rotatably mounted on the inner wall of the flow guide cavity, and one ends, far away from the end connected with the inner wall of the flow guide cavity, of the driving shafts extend into the vortex holes;
the driving shaft is provided with a driving paddle and a vortex paddle along the length direction of the driving shaft, the driving paddle is arranged in the diversion cavity and spirally arranged along the axial direction of the driving shaft; the vortex blade is arranged in the vortex hole;
the liquid inlet port is connected with a liquid inlet pipe used for filling the quenching medium in the diversion cavity, and the liquid outlet port is connected with a liquid outlet pipe used for leading out the medium in the diversion cavity.
In the quenching process, part of the quenching liquid enters the diversion cavity from the liquid inlet port and then is led out of the diversion cavity from the liquid outlet port, and in the flowing process of the quenching liquid entering the diversion cavity, because the pressure of the quenching liquid in the diversion cavity is greater than the pressure of the quenching liquid in the tank body, the quenching liquid in the diversion cavity can flow out from the vortex hole. Meanwhile, the quenching liquid in the diversion cavity exerts driving force on the spiral driving paddle so that the driving paddle rotates, the driving shaft drives the vortex paddle in the vortex hole to rotate, and the vortex paddle rotates to enable the quenching liquid in the vortex hole to flow out of the vortex hole in a vortex mode.
When the vortex-shaped quenching liquid is contacted with the strip steel entering the quenching tank at a certain flow speed, the vortex-shaped quenching liquid has concentrated and larger impulsive force, so that the unbalanced effect of a steam film on the surface of the strip steel can be caused, the existence time of the steam film is reduced during the quenching of the strip steel, the quenching performance of the strip steel is improved on one hand, the oxidation aging effect of the steam film on the quenching liquid is reduced on the other hand, and the utilization rate and the durability of the quenching liquid are improved.
Preferably, a feeding plate is mounted on one side of the substrate, a second guide hole for the strip steel to pass through is formed in the feeding plate, a ring-shaped feeding cavity is formed in the feeding plate around the second guide hole, and a feeding port communicated with the feeding cavity is formed in the feeding plate;
one side of the feeding plate close to the substrate is provided with a plurality of discharge holes which are used for corresponding to the vortex holes one by one, the side wall of the substrate is provided with a plurality of feeding holes which are communicated with the vortex holes one by one, and the discharge holes are communicated with the feeding holes.
Auxiliary agents such as a promoting refrigerant can be added into the feeding cavity of the feeding plate through the feeding port, the promoting refrigerant flows into the vortex hole at a certain flow rate to be mixed with the quenching liquid by controlling the pressure in the feeding cavity, and finally the promoting refrigerant reaches the surface of the strip steel along with the quenching liquid to quench the strip steel. The influence of the steam film stage on the strip steel can be reduced to a certain extent by the aid of the cooling promoting agent, the strip steel can be subjected to targeted treatment more intensively by the aid of the feeding mode of the feeding plate, and utilization rate of the cooling promoting agent is improved.
Preferably, a mixed liquid with the mass ratio of refrigerant particles to quenching medium of 1: 10-50 is added into the feeding cavity of the feeding plate through a feeding port;
the cooling promoter particles are prepared from the following raw materials in parts by weight: 100-150 parts of sucrose, 30-60 parts of ammonia gas, 20-30 parts of sodium chloride, 20-30 parts of potassium chloride, 20-30 parts of calcium chloride and 250-300 parts of water;
the preparation method of the cold accelerator particles comprises the following steps: adding the cane sugar, the sodium chloride, the potassium chloride and the calcium chloride into water according to the weight parts for melting, then heating and boiling to remove water, continuously heating to obtain a syrup mixture, introducing ammonia gas into the syrup mixture, cooling the syrup mixture for solidification to obtain blocky refrigerating promoting agents, and grinding the blocky refrigerating promoting agents into powder to obtain the refrigerating promoting agent particles.
After the particles of the refrigerant are fed into the vortex holes and approach the surface of the strip steel, the particles of the refrigerant are heated to melt, and release bubbles and inorganic salts such as potassium chloride, calcium chloride and the like. The bubbles can break the steady state of the steam film of the strip steel, thereby reducing the existence time of the steam film and improving the quenching performance of the strip steel; the inorganic salts such as potassium chloride, calcium chloride and the like are beneficial to reducing the probability of the steam film being formed again after the steam film which breaks the steady state is broken, and the inorganic salts can be uniformly dispersed on the surface of the strip steel in a vortex mode when being released, so that the effect can be achieved more effectively and quickly.
Preferably, the particle size of the cooling promoter particles is controlled to be 0.1-1mm.
The particle size of the cooling promoter particles is controlled to be 0.1-1mm, so that the cooling promoter particles are better dispersed in the quenching liquid.
Preferably, the raw material of the cooling promoting agent particles also comprises 10-20 parts of carbon powder.
The cooling promoting agent particles contain carbon powder, when the cooling promoting agent particles release bubbles, the carbon powder can also be released to the surface of the strip steel, and the process of releasing and diffusing the carbon powder is just a dynamic process of quenching, so that if oxygen participates in the oxidation reaction in the quenching process, the carbon powder can be combined with the oxygen in advance to react, the accumulation of oxide skin on the strip steel is reduced, and the quenching quality of the strip steel is improved.
Preferably, in the quenching process in step S4, the step of introducing the strip into the quenching tank is as follows:
a1: the quenching medium is filled into the diversion cavity (312) through the liquid inlet port (313) and is led out from the liquid outlet port (314), the flow speed of the quenching medium in the diversion cavity (312) is controlled to meet the requirement that the rotating speed of the driving shaft (317) is 500-2000r/min, and the pressure of the quenching medium in the diversion cavity (312) is greater than the pressure of the quenching medium in the tank body (1); filling the mixed solution of the refrigerant particles and the quenching medium into the feeding cavity (322) from the feeding port (323) of the feeding plate (32), and controlling the liquid pressure in the feeding cavity (322) to be greater than the liquid pressure in the vortex hole (316);
a2: the strip steel to be quenched is led into a quenching tank body (1) and sequentially passes through a first secondary oil tank (11), a quenching auxiliary mechanism (3) in the first secondary oil tank (11), a second secondary oil tank (12) and a third secondary oil tank (13), and the speed is controlled to be 1-2m/min.
The rotating speed in the diversion cavity is controlled to be 500-2000r/min, the pressure of the quenching medium in the diversion cavity is larger than the pressure of the quenching medium in the tank body, the pressure of the liquid in the feeding cavity is larger than the pressure of the liquid in the vortex hole, so that vortex flow towards the strip steel can be continuously generated in the vortex hole, and the material in the feeding cavity can enter the vortex hole. The speed of the strip steel is controlled to be 1-2m/min, so that the strip steel can achieve the best quenching effect.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the quenching tank is divided into a first secondary oil tank, a second secondary oil tank and a third secondary oil tank according to three stages of 'steam film stage', 'boiling stage' and 'convection stage' of quenching, so that the situation that asphaltene flows into quenching oil in the boiling stage due to convection among the quenching oil, the heat transfer of strip steel in the boiling stage is hindered, the quenching quality is influenced, and the utilization rate of the quenching oil is improved;
2. the quenching auxiliary mechanism is arranged to reduce the existence time of the steam film during the quenching of the strip steel, so that the quenching performance of the strip steel is improved, the oxidation and aging effects of the steam film stage on the quenching liquid are reduced, and the utilization rate and the durability of the quenching liquid are improved;
3. the cold accelerator particles and quenching oil are used for quenching the strip steel together in a vortex mode, the stable state of a strip steel steam film is broken through bubbles, the existence time of the steam film is reduced, and the probability of re-forming the steam film is reduced through inorganic salts such as potassium chloride, calcium chloride and the like, so that the quenching performance of the strip steel is improved.
Drawings
FIG. 1 is a perspective view of a quenching bath in embodiment 1 of the present application;
fig. 2 is an exploded view of a spacer and a filter member in example 1 of the present application;
FIG. 3 is a perspective view of a quenching auxiliary mechanism in embodiment 1 of the present application;
FIG. 4 is a cross-sectional view of a substrate in example 1 of the present application;
fig. 5 is a sectional view of a material-feeding plate in embodiment 1 of the present application.
Description of reference numerals: 1. a trough body; 11. a first secondary sump; 12. a second secondary sump; 13. a third secondary sump; 2. a partition plate; 21. a through hole; 22. a flow-through hole; 23. a filter member; 231. a flow fan; 232. a filter screen; 3. a quenching auxiliary mechanism; 31. a substrate; 311. a first guide hole; 312. a flow guide cavity; 313. a liquid inlet port; 314. a liquid outlet port; 315. a blocking plate; 316. a swirl hole; 317. a drive shaft; 318. driving the paddle; 319. a vortex blade; 32. a feed plate; 321. a second guide hole; 322. a charging cavity; 323. a charging port; 324. a discharge hole; 4. circulating the oil tank; 41. an oil outlet pipe; 42. an oil inlet pipe.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
Preparation examples 1 to 8
Preparation examples 1 to 8 provide a cooling promoter granule and a preparation method thereof, and the following table 1 shows the content of raw materials used for the cooling promoter granule in the preparation examples 1 to 8.
TABLE 1 content of raw materials (kg) for the pellets of the cooling accelerator
The preparation of the cold accelerator granules of preparation examples 1 to 8 was as follows:
adding sucrose, sodium chloride, potassium chloride, calcium chloride and carbon powder into warm water of 50 deg.C according to the above proportion, melting, stirring at 100r/min for 20min, heating to boil the mixed solution, and boiling to remove water to separate out solid. Heating to melt the solid completely to obtain syrup. And then transferring the syrup into a preheated closed kettle, controlling the temperature of the closed kettle to be higher than the temperature before syrup transfer, introducing ammonia gas into the closed kettle at the pressure of 10 atmospheres by using an air pump, closing a valve after the ammonia gas is introduced, cooling the closed kettle to room temperature to obtain blocky refrigerating promoting agent, and grinding the blocky refrigerating promoting agent through 140 meshes to obtain the refrigerating promoting agent particles.
Examples
Example 1
The embodiment 1 of the application discloses a processing method of a steel belt for an automobile safety belt coil spring, which comprises the following steps:
s1: acid pickling, namely, the carbon steel is firstly peeled, so that oxide skin on the surface of the steel strip is loosened, and rust and abrasion on the surface of the steel strip are more easily removed; then putting the steel strip into an acid tank, and reacting with hydrochloric acid, wherein the concentration of the hydrochloric acid is 15wt%, the temperature of the acid tank is 30 ℃, and the pickling time is 10min; washing the residual hydrochloric acid on the surface of the steel strip by water after the pickling is finished; entering a brushing machine, and brushing off residues after the acid washing reaction on the surface of the steel strip; entering a neutralization tank, wherein the pH value of the neutralization tank is between 6 and 8, and the surface of the steel belt can be protected from rusting; drying after surface passivation treatment, and coiling the steel strip into a roll shape by a coiler so as to be convenient to transport to a subsequent working section for processing;
s2: shearing, namely shearing the pickled steel strip to obtain the steel strip with the width 30 times that of the finished steel strip;
s3: polishing, namely polishing the band steel subjected to the splitting, flattening the surface and removing burrs generated by the splitting;
s4: and quenching, namely guiding the strip steel into a quenching furnace to be heated to 800-980 ℃, then guiding the strip steel into a quenching tank to be cooled to room temperature by using a quenching medium, wherein the quenching oil is Quickenford GKS quenching oil.
S5: polishing, polishing the quenched strip steel to enable iron scales generated in the heating process to fall off;
s6: rolling, namely rolling the polished strip steel at the rolling speed of 80m/min, 5 passes and the reduction ratio of 5 percent;
s7: slitting, namely longitudinally dividing the rolled steel strip into a plurality of steel strips with the width equal to that of the safety belt coil spring;
s8: and (5) edge pressing, namely edge pressing is carried out on the steel belt after slitting, and burrs on the edge of the steel belt are removed.
Referring to fig. 1, the quenching tank used in step S4 includes a strip-shaped tank body 1, two partition plates 2 are arranged in the tank body 1 at intervals along the length direction of the tank body 1, and the tank body 1 is divided into a first secondary oil tank 11, a second secondary oil tank 12 and a third secondary oil tank 13 by the two partition plates 2 in the length direction.
Referring to fig. 1 and 2, the partition plate 2 is provided with a through hole 21 for passing the strip steel and a flow hole 22 for flowing quenching oil. Install in the circulation hole 22 and filter 23, filter 23 is including setting up in the filter screen 232 of flow hole both sides, and filter screen 232 passes through the bolt and fixes continuous with baffle 2, installs flow fan 231 between two filter screens 232. When the flow fan 231 is normally started to rotate, the quenching medium flows from the third secondary oil sump 13 into the second secondary oil sump 12 or from the second secondary oil sump 12 into the first secondary oil sump 11.
Referring to fig. 1 and 3, the quench assistance mechanism 3 is provided in the first secondary oil groove 11. The quenching auxiliary mechanism 3 includes 4 base plates 31 and 3 feed plates 32 provided in the first secondary oil tank 11. The 4 base plates 31 are arranged in the first secondary oil tank 11 at equal intervals along the transmission direction of the strip steel, and the feeding plate 32 is fixedly connected between the two adjacent base plates 31.
Referring to fig. 4 and 5, the base plate 31 is provided with a first guide hole 311 through which the strip passes, and the feed plate 32 is provided with a second guide hole 321 through which the strip passes. When the strip steel is guided into the first secondary oil groove 11, the strip steel firstly passes through the first guide holes 311 and the second guide holes 321 in a staggered manner, and finally enters the second secondary oil groove 12 through the through holes 21 on the partition plate 2.
Referring to fig. 4, a circle of annular guide cavities 312 are formed in the base plate 31 around the circumference of the first guide hole 311, a liquid inlet 313 for introducing quenching oil into the guide cavities 312 and a liquid outlet 314 for leading quenching liquid out of the guide cavities 312 are fixedly connected to the top of the base plate 31, and both the liquid inlet 313 and the liquid outlet 314 can be connected to a pipeline for conveying quenching liquid.
Referring to fig. 4, a blocking plate 315 for blocking an annular passage of the guide cavity 312 is fixedly connected in the guide cavity 312, and the blocking plate 315 is located between the liquid inlet port 313 and the liquid outlet port 314, so that the quenching oil in the guide cavity 312 can continuously flow from the liquid inlet port 313 to the liquid outlet port 314, and an annular unidirectional quenching oil flow passage is formed.
Referring to fig. 4, a plurality of scroll holes 316 communicated with the guide cavity 312 are formed on the hole wall of the first guide hole 311 at equal intervals along the circumferential direction of the first guide hole 311. A plurality of driving shafts 317 which are in one-to-one correspondence with the vortex holes 316 are arranged on the inner wall of the guide cavity 312 at equal intervals along the circumferential direction of the guide cavity 312, the driving shafts 317 are rotatably connected with the inner wall of the guide cavity 312, and one end of the driving shaft 317, which is far away from the end connected with the inner wall of the guide cavity 312, extends into the vortex holes 316.
Referring to fig. 4, a driving blade 318 and a vortex blade 319 are fixedly connected to the driving shaft 317 along a length direction of the driving shaft 317. The driving paddle 318 is disposed on the side wall of the driving shaft 317 in the guide cavity 312, and the driving paddle 318 is spirally disposed along the circumference of the driving shaft 317. The swirl vanes 319 are provided on the side wall of the drive shaft 317 within the swirl bore 316.
Referring to fig. 4, when the quenching oil in the diversion cavity 312 flows, the pressure of the quenching oil in the diversion cavity 312 is controlled to be greater than the pressure of the quenching oil in the tank body 1, at this time, the spiral driving paddle 318 is driven to rotate under the flow of the quenching oil, and drives the vortex paddle to rotate in the vortex hole 316, so that the quenching oil flowing out of the vortex hole 316 forms a vortex.
Referring to fig. 5, a ring-shaped feeding cavity 322 is formed in the feeding plate 32 around the second guiding hole 321, a feeding port 323 communicating with the feeding cavity 322 is fixedly disposed at the top of the feeding plate 32, and the feeding port 323 is used for feeding the mixture of the refrigerant particles and the quenching oil into the feeding cavity 322.
Referring to fig. 5, a plurality of discharge holes 324 are formed in the sidewall of one side of the feeding plate 32 at equal intervals around the second guide hole 321 in the circumferential direction, and the positions of the discharge holes 324 correspond to the positions of the scroll holes 316 one to one. The side wall of the vortex hole 316 is provided with a feed hole, and the discharge hole 324 is communicated with the feed hole.
Referring to fig. 5, a circulating oil tank 4 for guiding the excessively long quenching oil used in the tank body 1 out of the first secondary oil tank 11 and guiding new quenching oil into the third secondary oil tank 13 is arranged outside the tank body 1, an oil outlet pipe 41 with a pump body and an oil inlet pipe 42 with a pump body are connected to the circulating oil tank 4, the oil inlet pipe 42 is communicated with the third secondary oil tank 13, and the oil outlet pipe 41 is communicated with the first secondary oil tank 11. A waste oil cavity and a new oil cavity which are not communicated with each other are arranged in the circulating oil tank 4, quenching oil led out from the first secondary oil tank 11 enters the waste oil cavity, and new quenching oil in the new oil cavity is led into the third secondary oil tank 13.
The implementation principle of the quenching tank for producing the coil spring of the automobile safety belt is as follows: when the strip steel enters the quenching tank body 1, the strip steel sequentially enters the first secondary oil tank 11, passes through the quenching auxiliary mechanism 3, is led out of the first secondary oil tank 11, passes through the second secondary oil tank 12 and passes through the third secondary oil tank 13, and the quenching step of the strip steel is completed. In the first secondary oil tank 11, the strip steel mainly undergoes a steam film stage of quenching; in the second secondary oil bath 12, the strip mainly undergoes a boiling stage of quenching; in the third secondary oil bath 13, the strip is subjected mainly to the convection phase of quenching.
In the first secondary oil tank 11 and the guide cavity 312 of the substrate 31 in the auxiliary quenching mechanism, the quenching oil drives the driving paddle 318 to rotate when flowing, and the driving paddle 318 drives the vortex paddle 319 to rotate through the driving shaft 317. Quenching oil in the diversion cavity 312 flows out of the vortex hole 316 and impacts the surface of the strip steel in a vortex form under the driving of the vortex blades 319, so that the steam film is unstable. The mixture of the coolant particles and the quenching oil added in the feeding plate 32 flows into the swirl holes 316 through the discharging holes 324, and impacts the surface of the strip along with the quenching oil in the swirl holes 316 to accelerate the disappearance of the steam film.
In the quenching process in the step S4, the step of guiding the heated strip steel into a quenching tank is as follows:
the refrigerant particles prepared in preparation example 1 were used.
In the mixture of the quenching oil and the cooling promoting agent particles added into the feeding cavity 322, the mass ratio of the quenching oil to the cooling promoting agent particles is 1: 50.
a1: the quenching oil is filled into the diversion cavity 312 through the liquid inlet port 313 and is led out from the liquid outlet port 314, the flow speed of the quenching oil in the diversion cavity 312 is controlled to meet the requirement that the rotating speed of the driving shaft 317 is 2000r/min, the pressure of the quenching oil in the diversion cavity 312 is 5 atmospheric pressures, and the pressure of the quenching oil in the tank body 1 is 1 atmospheric pressure;
the mixed feed liquid of cryogen particles and quench medium is then fed into the feed cavity 322 from the feed port 323 of the feed plate 32, and the liquid pressure in the feed cavity 322 is controlled to 10 atmospheres.
a2: the strip steel to be quenched is guided into the quenching tank body 1 and passes through the first secondary oil tank 11, the quenching auxiliary mechanism 3 in the first secondary oil tank 11, the second secondary oil tank 12 and the third secondary oil tank 13 in sequence, and the passing speed of the strip steel is controlled to be 2m/min.
Example 2 differs from example 1 in that the refrigerant pellets prepared in preparation example 2 were used.
Example 3 differs from example 1 in that the refrigerant pellets prepared in preparation example 3 were used.
Example 4 differs from example 1 in that the refrigerant pellets obtained in production example 4 were used.
Example 5 differs from example 1 in that the refrigerant pellets prepared in preparation example 5 were used.
Example 6 differs from example 1 in that the refrigerant pellets obtained in production example 6 were used.
Example 7 differs from example 1 in that the refrigerant pellets obtained in production example 7 were used.
Example 8 differs from example 1 in that the refrigerant pellets obtained in production example 8 were used.
Example 9 differs from example 1 in that the substance charged in the charging cavity 322 of the charging plate 32 is only quenching oil.
Comparative example
The comparative example 1 is different from example 9 in that the quenching auxiliary mechanism 3 is not installed in the first secondary oil bath 11, and the strip steel passes through the first secondary oil bath 11, the second secondary oil bath 12, and the third secondary oil bath 13 in this order.
The difference between the comparative example 2 and the example 1 is that the mixture of sodium chloride, potassium chloride and calcium chloride with the mass ratio of 1: 1 is adopted as the cooling promoter particles.
The comparative example 3 differs from the example 1 in that the partition plate 2 is not provided in the quenching tank and the pumps on the oil feed pipe 42 and the oil discharge pipe 41 of the circulation tank 4 are not actuated.
Performance test
1. Quenching oil durability test
After one month of continuous quenching, the quenching oil in the tank body 1 in the example 1 and the comparative example 3 is completely extracted and filtered, and the impurity content obtained by filtering the quenching oil in the comparative example 1 and the comparative example 3 is obviously lower in the example 1 than in the comparative example 3.
2. Strip steel performance detection test
The mechanical properties of the quenched steel strips in examples 1-9 and comparative examples 1-2 were tested according to the method of YB/T4635-2017.
TABLE 2 mechanical Properties of the quenched strip
| Examples | Tensile Strength Rm (MPa) | Elongation after Break (%) | Fatigue life (times) |
| Example 1 | 2150 | 4％ | 72563 |
| Example 2 | 2143 | 4％ | 73245 |
| Example 3 | 2156 | 4％ | 73456 |
| Example 4 | 1821 | 4％ | 62134 |
| Example 5 | 1712 | 4％ | 58451 |
| Example 6 | 1821 | 4％ | 61234 |
| Example 7 | 1923 | 4％ | 75423 |
| Example 8 | 2086 | 4％ | 89453 |
| Example 9 | 1524 | 4％ | 52315 |
| Comparative example 1 | 1213 | 4％ | 34568 |
| Comparative example 2 | 1610 | 4％ | 55257 |
As can be seen from the above table, the mechanical properties of the strip steels obtained by quenching in the examples 1-3 are superior to those of the example 9, the comparative example 1 and the comparative example 2, which shows that the preparation of the cooling promoting agent particles, the quenching auxiliary mechanism and the cooling promoting agent particles by the preparation method in the example 1 has great influence on the quenching performance of the strip steels; the quenching auxiliary mechanism can improve the mechanical property of the strip steel after quenching, the cooling promoting agent particles adopt inorganic salts such as sodium chloride, potassium chloride, calcium chloride and the like to further improve the mechanical property of the strip steel after quenching, and the cooling promoting agent particles are prepared by adopting the preparation method in the embodiment 1-3 of the application to ensure that the mechanical property of the strip steel after quenching is improved to the highest degree. The comparison of examples 6-8 shows that the addition of carbon powder can improve the mechanical properties of the strip steel after quenching to a certain extent.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (6)
1. A processing method of a steel belt for a coil spring of an automobile safety belt is characterized by comprising the following steps:
s1: pickling, namely pickling the raw material steel strip;
s2: shearing, namely shearing the pickled steel strip to obtain the steel strip with the width 30-40 times that of the finished steel strip;
s3: polishing, namely polishing the sheared strip steel;
s4: quenching, namely guiding the strip steel into a quenching furnace to be heated to 800-980 ℃, and then guiding the strip steel into a quenching tank to be cooled by quenching medium;
s5: polishing, polishing the quenched strip steel; s6: rolling, rolling the polished strip steel;
s7: splitting, namely longitudinally dividing the rolled strip steel into a plurality of steel strips with the width equal to that of the safety belt coil spring;
s8: pressing edges, namely pressing the edges of the steel strips after splitting to remove burrs on the edges of the steel strips; the quenching tank adopted in the quenching in the step S4 comprises a tank body (1), a partition plate (2) used for sequentially dividing the tank body (1) into a first secondary oil tank (11), a second secondary oil tank (12) and a third secondary oil tank (13) along the conduction direction of the strip steel is arranged in the tank body (1), a through hole (21) for the strip steel to pass through and a flow hole for circulating a quenching medium are formed in the partition plate (2), and a filtering piece (23) used for filtering the quenching medium flowing through the flow hole is arranged on the partition plate (2);
a circulating oil tank (4) is arranged outside the tank body (1), an oil inlet pipe (42) used for guiding a quenching medium into the circulating oil tank (4) and an oil outlet pipe (41) used for guiding the quenching medium out of the circulating oil tank (4) are connected to the circulating oil tank (4), the oil inlet pipe (42) is communicated with the third secondary oil tank (13), the oil outlet pipe (41) is communicated with the first secondary oil tank (11), and pump bodies are arranged on the oil outlet pipe (41) and the oil inlet pipe (42);
a quenching auxiliary mechanism (3) is installed in the first secondary oil tank (11), the quenching auxiliary mechanism (3) comprises a base plate (31), a first guide hole (311) for a steel strip to pass through is formed in the base plate (31), a flow guide cavity (312) surrounding the first guide hole (311) is formed in the base plate (31), and a blocking plate (315) for blocking an annular passage of the flow guide cavity (312) is arranged in the flow guide cavity (312); a liquid inlet port (313) and a liquid outlet port (314) are formed in the substrate (31), the liquid inlet port (313) and the liquid outlet port (314) are both communicated with the diversion cavity (312), and the liquid inlet port (313) and the liquid outlet port (314) are respectively located on one side of the blocking plate (315);
a plurality of vortex holes (316) communicated with the flow guide cavity (312) are uniformly formed in the hole wall of the first guide hole (311), a plurality of driving shafts (317) with axes corresponding to and coincident with the axes of the vortex holes (316) one by one are rotatably installed on the inner wall of the flow guide cavity (312), and one ends, far away from the ends connected with the inner wall of the flow guide cavity (312), of the driving shafts (317) extend into the vortex holes (316);
the driving shaft (317) is provided with driving blades (318) and vortex blades (319) along the length direction of the driving shaft (317), the driving blades (318) are arranged in the diversion cavity (312), and the driving blades (318) are spirally arranged along the axial direction of the driving shaft (317); the swirl blades are arranged in the swirl holes (316);
the liquid inlet port (313) is connected with a liquid inlet pipe used for filling the quenching medium into the diversion cavity (312), and the liquid outlet port (314) is connected with a liquid outlet pipe used for guiding out the medium in the diversion cavity (312);
a feeding plate (32) is mounted on one side of the base plate (31), a second guide hole (321) for a steel strip to pass through is formed in the feeding plate (32), a ring-shaped feeding cavity (322) is formed in the feeding plate (32) around the second guide hole (321), and a feeding port (323) communicated with the feeding cavity (322) is formed in the feeding plate (32);
one side that charging plate (32) is close to base plate (31) has seted up a plurality of discharge openings (324) that are used for with vortex hole (316) one-to-one, set up a plurality of charge openings with vortex hole (316) one-to-one intercommunication on the lateral wall of base plate (31), discharge opening (324) are linked together with the charge opening.
2. The method of processing a steel belt for an automobile safety belt coil spring as claimed in claim 1, wherein: the filter element (23) comprises filter screens (232) arranged at two sides of the flow hole, and a flow fan (231) used for guiding the flow of the quenching medium is arranged between the two filter screens (232).
3. The method of processing a steel belt for an automobile safety belt coil spring as claimed in claim 1, wherein: a mixed liquid with the mass ratio of refrigerant particles to quenching medium of 1: 10-50 is added into the feeding cavity (322) of the feeding plate (32) through a feeding port (323);
the cold accelerator particles are prepared from the following raw materials in parts by weight: 100-150 parts of sucrose, 30-60 parts of ammonia gas, 20-30 parts of sodium chloride, 20-30 parts of potassium chloride, 20-30 parts of calcium chloride and 250-300 parts of water;
the preparation method of the cold accelerator particles comprises the following steps: adding the cane sugar, the sodium chloride, the potassium chloride and the calcium chloride into water according to the weight parts for melting, then heating and boiling to remove water, continuously heating to obtain a syrup mixture, introducing ammonia gas into the syrup mixture, cooling the syrup mixture for solidification to obtain blocky refrigerating promoting agents, and grinding the blocky refrigerating promoting agents into powder to obtain the refrigerating promoting agent particles.
4. The method of processing a steel belt for an automobile safety belt coil spring as claimed in claim 3, wherein: the particle size of the refrigerant particles is controlled to be 0.1-1mm.
5. The method of processing a steel belt for an automobile safety belt coil spring as claimed in claim 3, wherein: the raw material of the coolant particles also comprises 10-20 parts of carbon powder.
6. The method for processing a steel strip for a coil spring of an automobile safety belt as claimed in claim 3, wherein in the step S4, the step of introducing the steel strip into the quenching tank in the quenching process comprises the following steps:
a1: the quenching medium is filled into the diversion cavity (312) through the liquid inlet port (313) and is led out from the liquid outlet port (314), the flow speed of the quenching medium in the diversion cavity (312) is controlled to meet the requirement that the rotating speed of the driving shaft (317) is 500-2000r/min, and the pressure of the quenching medium in the diversion cavity (312) is greater than the pressure of the quenching medium in the tank body (1); filling the mixed solution of the refrigerant particles and the quenching medium into the feeding cavity (322) from the feeding port (323) of the feeding plate (32), and controlling the liquid pressure in the feeding cavity (322) to be greater than the liquid pressure in the vortex hole (316);
a2: the strip steel to be quenched is led into a quenching tank body (1) and sequentially passes through a first secondary oil tank (11), a quenching auxiliary mechanism (3) in the first secondary oil tank (11), a second secondary oil tank (12) and a third secondary oil tank (13), and the speed is controlled to be 1-2m/min.
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| US3792844A (en) * | 1972-05-31 | 1974-02-19 | G Berry | Quenching method and apparatus |
| CN203144466U (en) * | 2013-03-20 | 2013-08-21 | 泰州市里华齿轮厂 | Oil supply system of pressing and quenching machine tool |
| CN208346231U (en) * | 2018-06-04 | 2019-01-08 | 山东尧程科技股份有限公司 | A kind of inside and outside Dual-cyclone steel tube quenching device |
| CN208604167U (en) * | 2018-07-16 | 2019-03-15 | 辽宁科技学院 | A kind of oil hardening Fuel Tanking Unit of bi-metal bandsaw blades heat treatment |
| CN111118255A (en) * | 2019-12-23 | 2020-05-08 | 浙江富日进材料科技有限公司 | Processing method of precision steel belt for automobile safety belt coil spring |
| CN212680263U (en) * | 2020-04-28 | 2021-03-12 | 鹤壁高强紧固件有限公司 | Quenching oil filtering device of full-automatic mesh belt heat treatment production line |
| CN213203127U (en) * | 2020-09-26 | 2021-05-14 | 常州市汇丰天元热处理有限公司 | Quenching tank for rapidly cooling quenching medium |
| CN213835455U (en) * | 2020-11-16 | 2021-07-30 | 江苏华苏工业炉制造有限公司 | Vacuum quenching furnace with temperature regulation and control function |
| CN113046545B (en) * | 2021-03-11 | 2024-01-30 | 新余钢铁股份有限公司 | Narrow steel band heat treatment process |
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Denomination of invention: A processing method for steel strips used for automotive seat belt coil springs Effective date of registration: 20231127 Granted publication date: 20230324 Pledgee: Zhejiang Hangzhou Yuhang rural commercial bank Limited by Share Ltd. Tangqi branch Pledgor: ZHEJIANG FURIJIN MATERIAL TECHNOLOGY Co.,Ltd. Registration number: Y2023980067585 |