CN101691644B - Nonmagnetic soft stainless steel wire rod or stainless steel plate and method of manufacturing same - Google Patents
Nonmagnetic soft stainless steel wire rod or stainless steel plate and method of manufacturing same Download PDFInfo
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Abstract
The invention relates to a nonmagnetic soft stainless steel wire rod or stainless steel plate and a method of manufacturing the same. The stainless steel wire rod or stainless steel plate comprises the following components: C which is more than 0 percent and is less than or equal to 0.050 percent, Si which is more than 0 percent and is less than or equal to 1.00 percent, Mn which is equal to 8.00-15.00 percent, P which is less than or equal to 0.045 percent, S which is less than or equal to 0.030 percent, Cr which is equal to 13.00-18.00 percent, Ni which is equal to 4.00-8.00 percent, Cu which is equal to 1.50-4.00 percent and N which is more than 0 percent and is less than or equal to 0.050 percent. The method of manufacturing the nonmagnetic soft stainless steel wire rod or stainless steel plate comprises the following steps: A, steel billet is made by the alloy of the molten iron, the Cr, the Ni, the Mn and the Cu, and the steel billet is cast continuously into the stainless steelsquare billet or the stainless steel slab; B, heating the stainless steel square billet or the stainless steel slab to 1240-1260 DEG C and preserving the temperature of the stainless steel square billet or the stainless steel slab at 1240-1260 DEG C for 1.5-3 hours; C, rolling the stainless steel square billet into the stainless steel wire rod which has a diameter of 5.5-20 mm, or rolling the stainless steel slab into the stainless steel plate which has a thickness of 3-8 mm and a width of 1000-1300 mm; D, reeling the stainless steel wire rod or the stainless steel plate; and E, cooling the stainless steel wire rod or the stainless steel plate. The stainless steel wire rod or the stainless steel plate which is manufactured with the method has good cold processing performance and low cost.
Description
Technical field
The present invention relates to the soft stainless steel wire rod of a kind of no magnetic or stainless steel plate and manufacture method thereof.
Background technology
Magnetism-free stainless steel can be divided into two big classes according to the requirement of mechanical property.One class is requirement high strength, wear-resisting material, and a class is the soft steel that requirement has good cold-forming property.The high-strength abrasion-proof material can be added manganese in austenitic steel, the nitrogen element replaces valuable nickel element, obtains less expensive magnetism-free stainless steel.And, generally should select the austenitic stainless steel or nickelic, the copper bearing grade of steel of nickelic, low-carbon (LC), low nitrogen for use for the soft magnetism-free stainless steel that requires good cold-forming property, though can reach soft no magnetic, because of containing higher nickel, the price comparison costliness.
The conventional grade of steel of soft magnetism-free stainless steel is 305 (1Cr18Ni12), SUSXM7 (Cr18Ni9Cu3), new type soft magnetism-free stainless steel NTKD-4 (Cr16Ni14), NTKD-8 (Cr16Ni12.5Cu3.5) that Japan metal industry company succeeds in developing, the NSS304ES (Cr16Ni8Cu3) of Japan's new system steel exploitation, nickel content is all higher, the price comparison costliness, its tensile strength is generally at 490-580Mpa.
Summary of the invention
In order to overcome the above-mentioned deficiency of existing soft magnetism-free stainless steel, the invention provides a kind of cold-forming property is good, cost the is low soft stainless steel wire rod of no magnetic or steel plate and manufacture method thereof.
Technical scheme of the present invention is that smelting equipment adopts converter and vacuum decarburization to handle stove, raw material adopts purified molten iron, carbon and nitrogen element all are reduced to lower level, by increasing manganese and copper, reduced nickel element, pass through corresponding art breading again, thereby become economical soft magnetism-free stainless steel.
Know-why of the present invention is: stainless magnetic and tissue have relation, and it is nonmagnetic to be organized as austenite, are organized as ferrite and martensite then is magnetic.And stainless tissue and composition have much relations, stainless principal element one class is to form the element of cable body such as chromium, silicon, another kind of for forming austenitic element such as carbon, nitrogen, manganese, nickel, copper, this two dvielement must reach certain balance, and just to make stainless final tissue be austenite, thereby the characteristics that possess no magnetic, and carbon, nitrogen, manganese, nickel, copper content are high more, and austenite is stable more, and is nonmagnetic good more.
The material soft or hard of austenitic stainless steel is reflected as the height of tensile strength, and tensile strength is low more, and material is soft more.And the tensile strength of austenitic stainless steel is relevant with the element kind and the solid solution capacity of wherein solid solution, the carbon, the nitrogen that are solid-solubilized in the austenite improve its tensile strength, the manganese that is solid-solubilized in the austenite increases tensile strength to some extent, and the nickel and the copper that are solid-solubilized in the austenite reduce its tensile strength.So make magnetism-free stainless steel soft, tensile strength is low, must increase nickel and copper content, reduce carbon, nitrogen content.
But increase nickel content and increase manufacturing cost and product price, increase copper content the production difficulty is strengthened, waste product increases in the production.For price is reduced, nickel and copper content must be controlled in an amount of scope, certainly will cause and form austenitic element and reduce but controlled nickel and copper, influenced nonmagnetic again, therefore utilize manganese content to come balance, but manganese content is too high, can causes that again tensile strength raises.
So reach the purpose of economic soft no magnetic, various compositions and production technique must rational Match.The present invention has finally determined reasonable component and technology through repeatedly carry out the test of the soft magnetism-free stainless steel of various compositions in testing laboratory, and the product that obtains by production is softer than existing soft magnetism-free stainless steel, price is lower.
Steel grade of the present invention can be produced stainless steel wire rod, through being used for the material of products such as tape armored cable, standardized component, electronic component after the drawing, also can produce stainless steel plate, makes container, utensil that various tableware and cooking utensils, groove, basin, kettle etc. need deep hole pinching.
The quality per distribution ratio of the composition of soft non-magnetic rustproof steel wire rod of the present invention or steel plate is:
0＜C≤0.025％ 0＜Si≤0.35％ Mn?8.00％～8.60％P≤0.035％ S≤0.010％ Cr 13.00％～14.43％ Ni?4.00％～6.20％Cu 1.50％～2.70％ 0＜N≤0.026％
All the other are Fe and unavoidable impurities.
The diameter of wire rod is 5.5～20mm, and the thickness of steel plate is 3～8mm, and width is 1000～1300mm.
Stainless steel billet is an austenite in rolling back interior tissue, and its magnetic permeability is≤1.05, and is nonmagnetic, and tensile strength is 450～475Mpa.
The manufacture method of this soft non-magnetic rustproof steel wire rod or steel plate comprises following sequential steps:
A smelts steel billet
Adopt molten iron and chromium, nickel, manganese, copper alloy to smelt in converter and vacuum decarburization processing stove, after the quality per distribution ratio of the composition of molten steel reached and do not state requirement, continuous casting became stainless steel billet or slab:
All the other are Fe and unavoidable impurities for 0＜C≤0.025% 0＜Si≤0.35% Mn, 8.00%～8.60%P≤0.035% S≤0.010% Cr, 13.00%～14.43% Ni, 4.00%～6.20%Cu, 1.50%～2.70% 0＜N≤0.026%.
The heating of B steel billet
In sealed heating furnace, stainless steel billet or slab are heated to 1240～1260 ℃, are incubated 1.5～3 hours.
The C billet rolling
On stainless steel high-speed rod-rolling mill or steel plate hot continuous mill, stainless steel billet is rolled into the stainless steel wire rod that diameter is 5.5～20mm, or the stainless steel slab is rolled into thickness is that 3～8mm width is the stainless steel plate of 1000～1300mm.
D batches on reeling machine stainless steel wire rod or stainless steel plate is rolled into coil of strip.
The E cooling is with stainless steel wire rod or stainless-steel roll cool to room temperature.
F annealing, pickling
Annealing on the annealing of stainless steel wire rod or stainless-steel roll, the pickling lines, obtaining finished product stainless steel wire rod or stainless-steel roll after the pickling.
Soft non-magnetic rustproof steel wire rod of the present invention or stainless steel plate have following characteristics:
(1) compares with existing soft non-magnetic rustproof steel wire rod or stainless steel plate, obviously reduced the content of nickel, general nickel has reduced more than 2.0% (to be compared with the content of nickel, by being reduced to 6.0～7.0% more than 9.0%) and tensile strength be reduced to 450～475Mpa, see Table 1, softer than existing soft magnetism-free stainless steel, and cost reduces by 3000 yuan/ton.
(2) this soft magnetism-free stainless steel is an austenite in rolling back interior tissue, thereby can reach nonmagnetic, can't attract with high strong magnet, measures its magnetic permeability and is 1.02 and see Table 1, less than the general standard of magnetism-free stainless steel magnetic permeability≤1.05.
This magnetism-free stainless steel of table 1 (the finished product stainless steel wire rod) and conventional magnetism-free stainless steel performance comparison
[0036] embodiment
Describe the embodiment of this soft non-magnetic rustproof steel wire rod or stainless steel plate and manufacture method thereof in detail below in conjunction with embodiment, but the embodiment of this soft non-magnetic rustproof steel wire rod or stainless steel plate and manufacture method thereof is not limited to following embodiment.
Wire rod embodiment one
The mass percent proportioning of the chemical ingredients of the non-magnetic rustproof steel wire rod of present embodiment is:
C：0.015％ Si：0.30％ Mn：8.45％ P：0.025％ S：0.006％
Cr：14.30％ Ni：6.10％ N：0.025％ Cu：2.60％
All the other are Fe and unavoidable impurities.
The non-magnetic rustproof steel wire rod specification of present embodiment is 5.5mm, and tensile strength is 460Mpa, and magnetic permeability is 1.02.
Wire rod embodiment two
The mass percent proportioning of the chemical ingredients of present embodiment non-magnetic rustproof steel wire rod is:
C：0.020％ Si：0.29％ Mn：8.20％ P：0.030％ S：0.005％
Cr：14.50％ Ni：6.30％ N：0.020％ Cu：2.62％
All the other are Fe and unavoidable impurities.
The stainless steel wire rod specification of present embodiment is 11mm, and tensile strength is 470Mpa, and magnetic permeability is 1.03.
Wire rod embodiment three
The mass percent proportioning of the chemical ingredients of the non-magnetic rustproof steel wire rod of present embodiment is:
C：0.025％ Si：0.35％ Mn：8.60％ P：0.035％ S：0.010％
Cr：14.43％ Ni：6.20％ N：0.026％ Cu：2.70％
All the other are Fe and unavoidable impurities.
The stainless steel wire rod specification of present embodiment is 6.5mm, and tensile strength is 465Mpa, and magnetic permeability is 1.03.
Steel plate embodiment
The mass percent proportioning of the chemical ingredients of the non-magnetic rustproof steel plate of present embodiment is:
C：0.018％ Si：0.40％ Mn：8.50％ P：0.028％ S：0.003％
Cr：14.30％ Ni：6.50％ N：0.030％ Cu：2.75％
All the other are Fe and unavoidable impurities.
The stainless steel plate thickness of present embodiment is 4.0mm, and tensile strength is 475Mpa, and magnetic permeability is 1.02.
The interior tissue of above-mentioned four embodiment is austenite.
Manufacture method embodiment one
That present embodiment prepares is wire rod embodiment one, the steps include:
A smelts steel billet
Adopt molten iron and chromium, nickel, manganese, copper alloy to smelt in converter and vacuum decarburization processing stove, continuous casting becomes the non-magnetic rustproof billet then, and the mass percent of the chemical ingredients of stainless steel billet is:
C：0.015％ Si：0.30％ Mn：8.45％ P：0.025％ S：0.006％
Cr：14.30％ Ni：6.10％ N：0.025％ Cu：2.60％
All the other are Fe and unavoidable impurities.
The heating of B steel billet
In sealed heating furnace, stainless steel billet is heated to 1240～1260 ℃, is incubated 3 hours.
The C billet rolling
On the stainless steel high-speed rod-rolling mill, stainless steel billet is rolled into the stainless steel wire rod that specification is 5.5mm.
D batches
On reeling machine, stainless steel wire rod is rolled into the coil of strip that internal diameter is 1150mm.
The E cooling
In transport establishment, move, with Stainless Steel Disc silver lap cool to room temperature.
F annealing, pickling
Annealing on stainless steel wire rod annealing, the pickling lines, obtaining the finished product stainless steel wire rod after the pickling.(304 annealing routinely, acid cleaning process carry out, and do not need special control.)
Manufacture method embodiment two
That present embodiment prepares is wire rod embodiment two, the steps include:
A smelts steel billet
Adopt molten iron and chromium, nickel, manganese, copper alloy in converter and vacuum decarburization processing stove, to smelt, right
Back continuous casting becomes TDL stainless steel billet or slab, and the quality per distribution ratio of the chemical ingredients of stainless steel billet is:
C：0.020％ Si：0.29％ Mn：8.20％ P：0.030％ S：0.005％
Cr：14.50％ Ni：6.30％ N：0.020％ Cu：2.62％
All the other are Fe and unavoidable impurities.
The heating of B steel billet
In sealed heating furnace, stainless steel billet is heated to 1240～1260 ℃, is incubated 1.5 hours.
The C billet rolling
On the stainless steel high-speed rod-rolling mill, stainless steel billet is rolled into the stainless steel wire rod that diameter is 11mm.
D batches
On reeling machine, stainless steel wire rod is rolled into the coil of strip that internal diameter is 1150mm.
The E cooling
In transport establishment, move, with Stainless Steel Disc silver lap cool to room temperature.
F annealing, pickling
Annealing on stainless steel wire rod annealing, the pickling lines, obtaining the finished product stainless steel wire rod after the pickling.
Manufacture method embodiment three
That present embodiment prepares is wire rod embodiment three, and its step is
A smelts steel billet
Adopt molten iron and chromium, nickel, manganese, copper alloy to smelt in converter and vacuum decarburization processing stove, continuous casting becomes TDL stainless steel billet or slab then, and the mass percent of the chemical ingredients of stainless steel billet is:
C：0.025％ Si：0.35％ Mn：8.60％ P：0.035％ S：0.010％
Cr：14.43％ Ni：6.20％ N：0.026％ Cu：2.70％
All the other are Fe and unavoidable impurities.
The heating of B steel billet
In sealed heating furnace, stainless steel billet is heated to 1240～1260 ℃, is incubated 2 hours.
The C billet rolling
On the stainless steel high-speed rod-rolling mill, stainless steel billet is rolled into the stainless steel wire rod that diameter is 6.5mm.
D batches
On reeling machine, stainless steel wire rod is rolled into the coil of strip that internal diameter is 1150mm.
The E cooling
In transport establishment, move, with Stainless Steel Disc silver lap cool to room temperature.
F annealing, pickling
Annealing on stainless steel wire rod annealing, the pickling lines, obtaining the finished product stainless steel wire rod after the pickling.
Manufacture method embodiment four
That present embodiment prepares is nonmagnetic steel plate embodiment, and its step is
A smelts steel billet
Adopt molten iron and chromium, nickel, manganese, copper alloy to smelt in converter and vacuum decarburization processing stove, continuous casting becomes TDL stainless steel slab then, and the mass percent of the chemical ingredients of stainless steel billet is:
C：0.018％ Si：0.40％ Mn：8.50％ P：0.028％ S：0.003％
Cr：14.30％ Ni：6.50％ N：0.030％ Cu：2.75％
All the other are Fe and unavoidable impurities.
The heating of B steel billet
In sealed heating furnace, the stainless steel slab is heated to 1240～1260 ℃, is incubated 2.5 hours.
The C billet rolling
On the steel plate hot continuous mill, the stainless steel slab is rolled into the stainless steel plate that thickness is 4.0mm.
D batches
On reeling machine, stainless steel plate is rolled into the coil of strip that internal diameter is 1500mm.
The E cooling
In transport establishment, move, with stainless steel plate coil of strip cool to room temperature.
F annealing, pickling
Annealing on stainless-steel roll annealing, the pickling lines, obtaining the finished product stainless-steel roll after the pickling.
The interior tissue of four embodiment of manufacture method is austenite.
Claims (4)
1. soft stainless steel wire rod of no magnetic or stainless steel plate, the quality per distribution ratio of its composition is:
All the other are Fe and unavoidable impurities for 0＜C≤0.025% 0＜Si≤0.35% Mn, 8.00%～8.60%P≤0.035% S≤0.010% Cr, 13.00%～14.43% Ni, 4.00%～6.20%Cu, 1.50%～2.70% 0＜N≤0.026%; The diameter of wire rod is 5.5～20mm, and the thickness of steel plate is 3～8mm, and width is 1000～1300mm; The interior tissue of stainless steel wire rod or stainless steel plate is an austenite, and its magnetic permeability is≤1.05, and is nonmagnetic, and tensile strength is 450～475MPa.
2. manufacture method of not having soft stainless steel wire rod of magnetic or stainless steel plate, it comprises following sequential steps:
A smelts steel billet
Adopt molten iron and chromium, nickel, manganese, copper alloy to smelt in converter and vacuum decarburization processing stove, after the quality per distribution ratio of the composition of molten steel reached following requirement, continuous casting became stainless steel billet or slab:
All the other are Fe and unavoidable impurities for 0＜C≤0.025% 0＜Si≤0.35% Mn, 8.00%～8.60%P≤0.035% S≤0.010% Cr, 13.00%～14.43% Ni, 4.00%～6.20%Cu, 1.50%～2.70% 0＜N≤0.026%;
The heating of B steel billet
In sealed heating furnace, stainless steel billet or slab are heated to 1240～1260 ℃, are incubated 1.5～3 hours;
The C billet rolling
On stainless steel high-speed rod-rolling mill or steel plate hot continuous mill, stainless steel billet is rolled into the stainless steel wire rod that diameter is 5.5～20mm, or the stainless steel slab is rolled into thickness is that 3～8mm width is the stainless steel plate of 1000～1300mm;
D batches
On reeling machine, stainless steel wire rod or stainless steel plate are rolled into coil of strip;
The E cooling
With stainless steel wire rod or stainless-steel roll cool to room temperature.
3. the manufacture method of soft stainless steel wire rod of no magnetic according to claim 2 or stainless steel plate, it is characterized in that: after step e cooling, also anneal and pickling, stainless steel wire rod or stainless-steel roll are being annealed on stainless steel wire rod or stainless-steel roll annealing, the pickling lines, obtained finished product stainless steel wire rod or stainless-steel roll after the pickling.
4. claim requires the manufacture method of 2 soft stainless steel wire rods of described no magnetic or stainless steel plate, it is characterized in that the quality per distribution ratio of the composition of molten steel is when steps A is smelted steel billet:
All the other are Fe and unavoidable impurities for C:0.025% Si:0.35% Mn:8.60% P:0.035% S:0.010%Cr:14.43% Ni:6.20% N:0.026% Cu:2.70%.
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Cited By (1)
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| CN104259199B (en) * | 2014-08-06 | 2016-03-16 | 无锡兴澄特种材料有限公司 | Stainless steel wire rod rolling mill practice |
| CN105513702A (en) * | 2016-01-14 | 2016-04-20 | 上海新益电力线路器材有限公司 | Enclosed armored smokeless halogen-free non-inflammable electric wire |
| CN106244944A (en) * | 2016-08-25 | 2016-12-21 | 江苏申源特钢有限公司 | A kind of non-magnetic rustproof steel wire rod and production method thereof |
| CN113718183A (en) * | 2017-06-10 | 2021-11-30 | 深圳市富鹏达金属材料有限公司 | Non-magnetic alloy steel |
| CN110722330A (en) * | 2019-10-31 | 2020-01-24 | 武汉钢铁有限公司 | Production method of ultra-low carbon steel wire rod for electric conduction |
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