CN103137283A - Degaussing method and device in machining deformation process of austenitic stainless products - Google Patents
Degaussing method and device in machining deformation process of austenitic stainless products Download PDFInfo
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- CN103137283A CN103137283A CN2011103773332A CN201110377333A CN103137283A CN 103137283 A CN103137283 A CN 103137283A CN 2011103773332 A CN2011103773332 A CN 2011103773332A CN 201110377333 A CN201110377333 A CN 201110377333A CN 103137283 A CN103137283 A CN 103137283A
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Abstract
The invention discloses a degaussing method and a device in a machining deformation process of austenitic stainless products. An alternating current is adopted, an alternating magnetic field and attenuation degaussing conditions of the alternating magnetic field are provided, and deformation of the stainless products is conducted in the alternating magnetic field. Meanwhile, the invention discloses a degaussing device for a production line of stainless steel wires. The device comprises an alternating-current transformer, a drawing die and a straightening metal wheel, wherein the straightening metal wheel is connected with a positive pole of the alternating-current transformer, an outlet end of the drawing die is connected with a negative pole of the alternating-current transformer, and the alternating-current transformer supplies the alternating magnetic field for the stainless steel wires through the straightening metal wheel and the drawing die. On-line degaussing in the preparation process of the stainless products is achieved through the degaussing method and the device, production processed are reduced, preparation process is shortened, a degaussing effect which is the same with an effect with the element of nickel (Ni) added to stabilize austenitic stainless steel is achieved, the content of the element of Ni with high price is replaced by low-cost investment, and cost of raw materials of the stainless products is reduced.
Description
Technical field
The invention belongs to the austenitic stainless steel products preparing technical field, particularly the demagnetization method in austenitic stainless steel products machining deformation process.
Background technology
Stainless steel material is widely used in the fields such as precision instrument, instrument, appliance circuit equipment, and this operational environment requires stainless steel material to be difficult for being magnetized.Common heat treatment austenitic stainless steel material is the stainless steel grade in a kind of basis, after heat treatment, interior tissue is austenite, this austenite is the inferior stable state institutional framework, in preparation machining deformation process, be easy to produce strain-induced martensite, martensitic structure has paramagnetism, under the outside magnetic field effect, makes the stainless steel products magnetization.This has seriously restricted the application of stainless steel material in the high-precision equipments such as precision instrument, instrument, appliance circuit, is therefore one of key issue of stainless steel material products preparing technical field to the demagnetization technical research of stainless steel material products.
At present, the main method that reduces metastable austenitic stainless steel material magnetic is to add austenite former, and the stable austenite phase mainly contains following several, a kind of is Ni content in improving alloy, the Ni element is austenite former, stable austenite phase in steel, and austenite does not externally show magnetic mutually, thereby reduce the magnetic of stainless steel material, but Ni element price is very expensive, is approximately 200 times of Fe, increases substantially stainless cost price; The another kind of method that reduces stainless steel material magnetic is for adding manganese element, the stable austenite phase, but adding of manganese element reduces the stainless steel material corrosion resistance, optimal means that therefore neither the stainless steel demagnetization.
Summary of the invention
The object of the present invention is to provide the demagnetization method in Yi Zhongshi body stainless steel products machining deformation process, realization is to online demagnetization in the stainless steel product preparation process, reduce production process, shorten preparation flow, reach with add Ni element stable austenite stainless steel same erasure effect, adopt low-cost investment to replace expensive Ni constituent content, reduce the cost of material of stainless steel product.
The present invention is achieved by the following technical solution:
Demagnetization method in austenitic stainless steel products machining deformation process comprises the following steps:
1. adopt alternating current, alternating magnetic field is provided, the stainless steel products distortion is carried out in alternating magnetic field, the irregular vibration of the electron production in the stainless steel material atom and rotation;
2. AC magnetic field decay degaussing condition is provided, and stainless steel products progressively away from magnetic field, forms externally-applied magnetic field by the demagnetization condition that dies down by force in distortion and traveling process, the strain-induced martensite magnetic moment direction is changed, and reaches to be difficult for magnetized purpose under outside magnetic field.
Stainless steel wire production line degaussing gear, comprise AC transformer, drawing mould and alignment metal wheel, described alignment metal wheel is connected with AC transformer is anodal, the described drawing mould port of export is connected with the AC transformer negative pole, and described AC transformer provides alternating magnetic field by alignment metal wheel and drawing mould to stainless steel wire.
Described drawing mould is the end product drawing mould.
Effective alternating magnetic field distance between described alignment metal wheel and drawing mould is 200mm-500mm.
Described alignment metal wheel is five alignment copper wheels.
The alternating voltage of described AC transformer is 1.5 V-12 V.
The metastable austenite stainless steel does not satisfy the stable austenite tissue that nickel equivalent forms, when cold deformation, the energy that obtains by distortion makes unsettled austenite to martensite transfor mation, in the machining deformation process, generation strain-induced martensite tissue, martensitic structure has paramagnetism, easily is magnetized thereby make under the stainless steel products outside magnetic field effect of preparation.Modern micromagnetism theory is told us, the magnetic domain stress effect in magnetizing mediums, and magnetic moment direction and magnetic direction occur and change and be magnetized in the tendency that the oriented paramagnetism of the magnetic moment of generation aligns in outside magnetic field.In order to eliminate stainless magnetization tendency, adopt electromagnetic induction principle, the access alternating current carries out the alternation magnetic stirring with the magnetic domain stress in strain-induced martensite, has kept the different magnetic moment direction of original state, and making comprehensive magnetic is zero.According to the demagnetization principle, AC magnetic field decay degaussing condition is provided, when entering die deformation, stainless steel products is in the alternating magnetic field that is produced by alternating current, product deformation carries out in alternating magnetic field, the irregular vibration of the electron production in the stainless steel material atom and rotation, and stainless steel products is in distortion and traveling process, progressively away from magnetic field, the formation externally-applied magnetic field changes the strain-induced martensite magnetic moment direction by the demagnetization condition that dies down by force, reaches to be difficult for magnetized purpose under strong external magnetic field.
Demagnetization method in austenitic stainless steel products machining deformation process of the present invention adopts alternating current, and alternating magnetic field is provided, and the stainless steel products distortion is carried out in alternating magnetic field, the irregular vibration of the electron production in the stainless steel material atom and rotation; AC magnetic field decay degaussing condition is provided simultaneously, stainless steel products progressively away from magnetic field, forms externally-applied magnetic field by the demagnetization condition that dies down by force in distortion and traveling process, the strain-induced martensite magnetic moment direction is changed, reach and be difficult for magnetized purpose under outside magnetic field.
Degaussing gear of the present invention is arranged on last one end product drawing stage of stainless steel wire production line, stainless steel wire is carried out demagnetization control.Be specially the effective alternating magnetic field distance of specified distance design before drawing mould position and mould, specified distance is installed 5 alignment copper wheels before mould, be connected with the positive pole of AC transformer, end product drawing mould outlet end is connected with the AC transformer negative pole, consist of a degaussing gear, stable alternating magnetic field in coverage is provided, stainless steel wire is carried out demagnetization in drawing process.
Beneficial effect of the present invention: the present invention has realized the online degaussing to stainless steel wire, stainless steel bar, stainless steel wire rod, under the effect of prepared product outside magnetic field, and exhibit magnetic properties not.Stainless steel products detects through strong magnetic, without magneticaction; Steel wire product per ton (price 30,000/ton) reduces by 40% with high Ni content stainless steel (316 stainless steels, price 50,000/ton) cost price, and this technology is simple, is applicable to continuous large-scale production.
Description of drawings
Fig. 1 is the structural representation of degaussing gear of the present invention.
Sequence number in figure: 1, AC transformer; 2, end product drawing mould; 3, alignment copper wheel; 4, stainless steel wire; 5, draw drum; 6, wire drawing machine roller.
Embodiment
Further illustrate the present invention below in conjunction with drawings and Examples:
Embodiment 1:
(1) preparation material selection:
The selected Steel material of the present invention is the 0Cr18Ni9(304 stainless steel).Material composition such as table 1.
Table 1 0Cr18Ni9(304) chemical composition of steel (wt%)
| C | Si | Mn | P | S | Cr | Ni | N |
| 0.072 | 0.71 | 1.89 | 0.028 | 0.022 | 18.02 | 9.03 | 0.09 |
(2) raw material pre-treatment:
Diameter is 6.5mm304(0Cr18Ni9) stainless steel wire rod, process through 1050 ℃ of high temperature solid solutions, the hydrochloric acid with 18% removes surface scale, with phosphate carry out coating, after 200 ℃ of drying and processings.
(3) cold-drawing process is worked out
(4) demagnetization method
Demagnetization method in a kind of austenitic stainless steel wires drawing deformation process adopts alternating current, and alternating magnetic field is provided, and the stainless steel wire distortion is carried out in alternating magnetic field, the irregular vibration of the electron production in the stainless steel wire atom and rotation; AC magnetic field decay degaussing condition is provided simultaneously, and stainless steel wire progressively away from magnetic field, forms externally-applied magnetic field by the demagnetization condition that dies down by force in distortion and traveling process, the strain-induced martensite magnetic moment direction is changed, and reaches to be difficult for magnetized purpose under outside magnetic field.
Embodiment 2:
Demagnetization method in austenitic stainless steel wires drawing deformation process adopts the method identical with embodiment 1.
A kind of stainless steel wire production line degaussing gear, comprise AC transformer 1, end product drawing mould 2 and five alignment copper wheels 3, described five alignment copper wheels 3 are connected with AC transformer 1 is anodal, described end product drawing mould 2 ports of export are connected with AC transformer 1 negative pole, described AC transformer 1 provides alternating magnetic field by five alignment copper wheels 3 and 2 pairs of stainless steel wires 4 of end product drawing mould, effective alternating magnetic field distance between described alignment copper wheel 3 and end product drawing mould 2 is 200mm, and the alternating voltage of described AC transformer 1 is 1.5 V.Adopt the method identical with embodiment 1, difference is that the stainless steel of selecting is the 1Cr18Mn8Ni5N(202 stainless steel), degaussing alternating voltage 1.5 V, the coverage of alternating magnetic field are 200mm, the preparation diameter is 1.0mm specification finished product stainless steel wire 4; Detect through strong magnetic, the 1Cr18Mn8Ni5N stainless steel wire 4 of preparation is easy magnetization not.
Embodiment 3:
Demagnetization method in austenitic stainless steel wires drawing deformation process adopts the method identical with embodiment 1.
A kind of stainless steel wire production line degaussing gear, comprise AC transformer 1, end product drawing mould 2 and five alignment copper wheels 3, described five alignment copper wheels 3 are connected with AC transformer 1 is anodal, described end product drawing mould 2 ports of export are connected with AC transformer 1 negative pole, described AC transformer 1 provides alternating magnetic field by five alignment copper wheels 3 and 2 pairs of stainless steel wires 4 of end product drawing mould, effective alternating magnetic field distance between described alignment copper wheel 3 and end product drawing mould 2 is 500mm, and the alternating voltage of described AC transformer 1 is 12 V.Adopt the method identical with embodiment 1, difference is that the stainless steel of selecting is the 1Cr17Ni7(301 stainless steel), degaussing alternating voltage 12 V, the coverage of alternating magnetic field are 500mm, the preparation diameter is 6mm specification finished product stainless steel wire 4; Detect through strong magnetic, the 1Cr17Ni7 stainless steel wire 4 of preparation is easy magnetization not.
Embodiment is just for the ease of understanding technical scheme of the present invention; do not consist of limiting the scope of the invention; every interior any simple modification, equivalent variations and modification of perhaps according to technical spirit of the present invention, above scheme being done that does not break away from technical solution of the present invention is within all still belonging to protection range of the present invention.
Claims (8)
1. the demagnetization method in austenitic stainless steel products machining deformation process comprises the following steps:
1. adopt alternating current, alternating magnetic field is provided, the stainless steel products distortion is carried out in alternating magnetic field, the irregular vibration of the electron production in the stainless steel material atom and rotation;
2. AC magnetic field decay degaussing condition is provided, and stainless steel products progressively away from magnetic field, forms externally-applied magnetic field by the demagnetization condition that dies down by force in distortion and traveling process, the strain-induced martensite magnetic moment direction is changed, and reaches to be difficult for magnetized purpose under outside magnetic field.
2. stainless steel wire production line degaussing gear, it is characterized in that: comprise AC transformer ⑴, drawing mould and alignment metal wheel, described alignment metal wheel is connected with AC transformer ⑴ is anodal, the described drawing mould port of export is connected with AC transformer ⑴ negative pole, and described AC transformer ⑴ provides alternating magnetic field by alignment metal wheel and drawing mould to stainless steel wire ⑷.
3. stainless steel wire production line degaussing gear according to claim 2, it is characterized in that: described drawing mould is end product drawing mould ⑵.
4. according to claim 2 or 3 described stainless steel wire production line degaussing gears is characterized in that: the effective alternating magnetic field distance between described alignment metal wheel and drawing mould is 200mm-500mm.
5. according to claim 2 or 3 described stainless steel wire production line degaussing gears, it is characterized in that: described alignment metal wheel is five alignment copper wheel ⑶.
6. according to claim 2 or 3 described stainless steel wire production line degaussing gears, it is characterized in that: the alternating voltage of described AC transformer is 1.5 V-12 V.
7. stainless steel wire production line degaussing gear according to claim 4, it is characterized in that: the alternating voltage of described AC transformer is 1.5 V-12 V.
8. stainless steel wire production line degaussing gear according to claim 5, it is characterized in that: the alternating voltage of described AC transformer is 1.5 V-12 V.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103773332A CN103137283A (en) | 2011-11-24 | 2011-11-24 | Degaussing method and device in machining deformation process of austenitic stainless products |
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| CN2011103773332A CN103137283A (en) | 2011-11-24 | 2011-11-24 | Degaussing method and device in machining deformation process of austenitic stainless products |
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| CN103137283A true CN103137283A (en) | 2013-06-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108637032A (en) * | 2018-04-18 | 2018-10-12 | 苏州启航不锈钢制品有限公司 | Zero magnet spring essence line of one kind and its production and processing technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4470094A (en) * | 1980-07-14 | 1984-09-04 | Electro-Matic Products Co. | Demagnetizing apparatus and method |
| CN2222396Y (en) * | 1994-09-05 | 1996-03-13 | 电子工业部第三十三研究所 | Demagnetising device for floppy disc |
| CN2476085Y (en) * | 2001-05-15 | 2002-02-06 | 建准电机工业股份有限公司 | Magnetizing device for rotor ring magnet |
| CN201044927Y (en) * | 2007-04-04 | 2008-04-09 | 江苏星火特钢有限公司 | Stainless steel wire cold-drawn on-line heating apparatus |
-
2011
- 2011-11-24 CN CN2011103773332A patent/CN103137283A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4470094A (en) * | 1980-07-14 | 1984-09-04 | Electro-Matic Products Co. | Demagnetizing apparatus and method |
| CN2222396Y (en) * | 1994-09-05 | 1996-03-13 | 电子工业部第三十三研究所 | Demagnetising device for floppy disc |
| CN2476085Y (en) * | 2001-05-15 | 2002-02-06 | 建准电机工业股份有限公司 | Magnetizing device for rotor ring magnet |
| CN201044927Y (en) * | 2007-04-04 | 2008-04-09 | 江苏星火特钢有限公司 | Stainless steel wire cold-drawn on-line heating apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 陈亚杰: "去磁现象和退磁方法", 《物理教师》, vol. 24, no. 10, 31 December 2003 (2003-12-31), pages 49 - 50 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108637032A (en) * | 2018-04-18 | 2018-10-12 | 苏州启航不锈钢制品有限公司 | Zero magnet spring essence line of one kind and its production and processing technology |
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Application publication date: 20130605 |