CN104233137B - Deformation and thermal treatment technology of nichrome alloy - Google Patents

Deformation and thermal treatment technology of nichrome alloy Download PDF

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Publication number
CN104233137B
CN104233137B CN201410428143.2A CN201410428143A CN104233137B CN 104233137 B CN104233137 B CN 104233137B CN 201410428143 A CN201410428143 A CN 201410428143A CN 104233137 B CN104233137 B CN 104233137B
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wire drawing
forging
nichrome
deformation
technology
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CN104233137A (en
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郭健
郭小芳
郭乃林
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Yancheng Xinyang Electric Heat Material Co Ltd
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Yancheng Xinyang Electric Heat Material Co Ltd
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Abstract

The invention relates to a processing technology of an electrothermal alloy material, and particularly relates to a deformation and thermal treatment technology of nichrome alloy. The technology comprises the following steps: (1) homogenizing annealing; (2) forging; (3) hot rolling of a wire rod; (4) solution treatment; (5) multi-pass wire drawing; and (6) stress relief annealing, wherein the multi-pass wire drawing refers to three-pass wire drawing, in the first wire drawing, a solution-treated wire rod with 12-15mm is processed until the diameter is 8-9mm, in the second wire drawing, the wire rod is processed until the diameter is 4-5mm, and in the third wire drawing, the wire rod is processed until the diameter is 2-3mm. The prepared finished material has excellent mechanical performance and service life, overcomes the deficiencies of the prior art, and has great industrial application prospects.

Description

The deformation of nichrome and Technology for Heating Processing
Technical field:
The present invention relates to a kind of processing technology of electrothermal alloy material, the deformation and heat treatment of particularly a kind of nichrome Technique.
Background technology:
Cr20Ni80 is a kind of important electrothermal alloy, with uniform resistivity it is stable, fusing point is high, thermal coefficient of expansion is low, The advantages of high antioxidant and good elevated temperature strength, processing forming and weldability, possess other classification electrothermal alloys and do not have The advantage used under the conditions of standby high-temperature mechanics, is the focus material of recent researches, is extensively made in electrical equipment and industrial furnace With.With regard to domestic nickel chromium triangle system electrothermal alloy product, its service life and quality still have larger gap compared with imported product, for example The life-span of domestic nichrome wire is generally 2000h, and the life-span of imported product is up to 7000h, and mechanical property is (including anti- Tensile strength, elongation percentage etc.) also there is sizable gap with foreign countries.The present invention is particularly become by further optimization processing technology Shape and Technology for Heating Processing are improving mechanical property, the service life of nichrome.
The content of the invention:
It is an object of the invention to overcome deficiency of the prior art, there is provided one kind can effectively improve nichrome mechanics The deformation of performance and used life and Technology for Heating Processing.
The deformation of nichrome and Technology for Heating Processing, the technique includes:(1) homogenizing annealing, (2) forging, (3) hot rolling Wire rod, (4) solution treatment, (5) multi-pass wire drawing and (6) stress relief annealing, it is characterised in that the multi-pass wire drawing is specially 12-15mm silk materials after solution treatment are worked into diameter 8-9mm, second Wire Drawing by three passage wire drawings, first time wire drawing To diameter 4-5mm, third time Wire Drawing to diameter 2-3mm.
The homogenizing annealing is specially after the ingot casting after melting is incubated into 16 hours in 950 DEG C of heat-treatment furnace with stove Cooling.
The forging is specially that the ingot casting after homogenizing annealing is put in isothermal forging machine and forges, and forging temperature is 1050 DEG C, the square billet of length of side 50mm is obtained, oil quenching after forging.
The gren rod is specially and for the sample after forging to carry out gren rod, hot-rolled temperature:1050 DEG C -1150 DEG C, Every time deflection≤15%, obtains the silk material of 12-15mm.
The solution treatment is specially and for the silk material after gren rod to carry out 1000 DEG C, solution treatment in 5 hours.
The stress relief annealing is specially and for product after multi-pass wire drawing to carry out 500 DEG C, 12 hours stress relief annealings.
The element composition of the nichrome and its proportioning are:C:0.1-0.2%, Si:0.1-0.2%, Cr:25-26%, Fe:3-5%, A1:2-4%, Sn:5-6%, Ge:2-3%, Ce:0.01-0.02%, B:0.05-0.1%, S≤0.0001%, P ≤ 0.0001%, balance of nickel and inevitable impurity.
The present invention effectively improves the mechanical property of alloy by the further deformation of optimization nichrome and Technology for Heating Processing And service life.Three passage wire drawings can effectively improve production efficiency, sufficiently achieve the effect of reinforcing silk material;Solution treatment and go Stress annealing can optimize morphology of carbides, reduce field trash to the negative effect of alloy substrate, fully release silk material internal stress, So as to improve service life.In addition, addition Rare-Earth Ce can purify alloy substrate, improve field trash pattern, crystal grain thinning, while The oxygen-enriched particle formed in grain boundaries can be formed to dislocation movement by slip and hindered, so as to improve alloy strength;The addition of micro B for Improve alloy plasticity and processing characteristics has important function;Alloy can be effectively improved by adding Cr, Fe, Al, Sn, Ge element High temperature resistance non-oxidizability and resistivity.Test shows that the nichrome tensile strength of the present invention is improved at least than Cr20Ni80 30%, 1200 DEG C of quick life values improve at least 60%.
Specific embodiment:
The present invention is expanded on further and understood below by embodiment.
The deformation of nichrome and Technology for Heating Processing, the technique includes:
(1) homogenizing annealing, along with the furnace cooling after the ingot casting after melting is incubated into 16 hours in 950 DEG C of heat-treatment furnace, The element composition of nichrome ingot casting and its proportioning are:C:0.16%th, Si:0.13%th, Cr:25.8%th, Fe:4%th, Al:3%th, Sn:5.7%th, Ge:2.8%th, Ce:0.015%th, B:0.07%th, S≤0.0001%, P≤0.0001%, balance of nickel and can not The impurity for avoiding;
(2) forge, the ingot casting after homogenizing annealing is put in isothermal forging machine and is forged, forging temperature is 1050 DEG C, is obtained To the square billet of length of side 50mm, oil quenching after forging;
(3) gren rod, by the sample after forging gren rod, hot-rolled temperature are carried out:1100 DEG C, every time deflection≤ 12%, obtain the silk material of 13mm;
(4) solution treatment, by the silk material after gren rod 1000 DEG C, solution treatment in 5 hours are carried out;
(5) multi-pass wire drawing, specially three passage wire drawings, first time wire drawing is worked into the 13mm silk materials after solution treatment Diameter 8.2mm, second Wire Drawing to diameter 4.5mm, third time Wire Drawing to diameter 2.1mm;
(6) stress relief annealing, by product after multi-pass wire drawing 500 DEG C, 12 hours stress relief annealings are carried out, and are finally accorded with Close desired nichrome wire finished product.
Test shows that the tensile strength and elongation percentage of the present embodiment product are respectively increased 34% and 15% than Cr20Ni80, 1200 DEG C of quick life values improve 68%.Nichrome excellent in mechanical performance, the long service life prepared by above-mentioned technique, gram Deficiency of the prior art is taken, with wide prospects for commercial application.
Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and is not to the present invention The restriction of embodiment.For those of ordinary skill in the field, it can also be made on the basis of the above description The change or variation of its multi-form.There is no need to be exhaustive to all of embodiment.And these belong to this Obvious change that bright spirit is extended out or among changing still in protection scope of the present invention.

Claims (4)

1. the deformation of nichrome and Technology for Heating Processing, the technique includes:(1) homogenizing annealing, (2) forging, (3) hot rolling disk Bar, (4) solution treatment, (5) multi-pass wire drawing and (6) stress relief annealing, it is characterised in that the multi-pass wire drawing is specially three 12-15mm silk materials after solution treatment are worked into diameter 8-9mm by passage wire drawing, first time wire drawing, and second Wire Drawing is arrived Diameter 4-5mm, third time Wire Drawing to diameter 2-3mm;The homogenizing annealing is specially the ingot casting after melting at 950 DEG C Heat-treatment furnace in insulation 16 hours after along with the furnace cooling;The forging is specially and for the ingot casting after homogenizing annealing to be put into isothermal forging Forging in machine is made, forging temperature is 1050 DEG C, obtains the square billet of length of side 50mm, oil quenching after forging;The gren rod is specially Sample after forging is carried out into gren rod, hot-rolled temperature:1050 DEG C -1150 DEG C, every time deflection≤15% obtains 12- The silk material of 15mm.
2. the deformation of nichrome as claimed in claim 1 and Technology for Heating Processing, it is characterised in that the solution treatment is concrete It is that the silk material after gren rod is carried out into 1000 DEG C, solution treatment in 5 hours.
3. the deformation of nichrome as claimed in claim 2 and Technology for Heating Processing, it is characterised in that the stress relief annealing tool Body is that product after multi-pass wire drawing is carried out into 500 DEG C, 12 hours stress relief annealings.
4. the deformation of nichrome as claimed in claim 3 and Technology for Heating Processing, it is characterised in that the unit of the nichrome Element composition and its proportioning are:C:0.1-0.2%, Si:0.1-0.2%, Cr:25-26%, Fe:3-5%, Al:2-4%, Sn:5- 6%th, Ge:2-3%, Ce.0.01-0.02%, B:0.05-0.1%, S≤0.0001%, P≤0.0001%, balance of nickel and not Evitable impurity.
CN201410428143.2A 2014-08-26 2014-08-26 Deformation and thermal treatment technology of nichrome alloy Active CN104233137B (en)

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CN109321783A (en) * 2018-12-07 2019-02-12 安徽金月节能科技有限公司 A kind of corrosion-resistant lectrothermal alloy wire of heating watt high resistance and preparation method thereof
CN110042263A (en) * 2019-04-23 2019-07-23 丹阳市海威电热合金有限公司 The preparation method of nickel chromium high-temperature alloy silk
CN111659750B (en) * 2020-05-22 2022-01-25 深圳市霆茂电子有限公司 Preparation process of high-durability nickel-chromium resistance wire
CN115216657B (en) * 2022-07-20 2023-09-26 镇江银海镍铬化工有限公司 Production process of high-performance nichrome resistance wire
CN115821115B (en) * 2022-11-18 2024-01-09 江阴市诚信合金材料有限公司 High-stability nichrome resistance alloy wire and production process thereof

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DE102012002514B4 (en) * 2011-02-23 2014-07-24 VDM Metals GmbH Nickel-chromium-iron-aluminum alloy with good processability
CN102191409B (en) * 2011-04-22 2012-07-04 江苏新华合金电器有限公司 New high-resistance electrical heating alloy material and preparation method thereof
CN103540803B (en) * 2013-10-30 2016-03-02 钢铁研究总院 A kind of high rigidity is without magnetic nichrome and preparation method thereof
CN103725972B (en) * 2014-01-13 2016-05-11 北京中钢控股集团有限公司 Polynary high-resistance electrothermic alloy of low-carbon (LC) and preparation method thereof
CN103952594B (en) * 2014-05-12 2016-06-08 盐城市鑫洋电热材料有限公司 A kind of preparation method of nickel chromium triangle system multi-element high-resistance electrothermal alloy
CN103938102B (en) * 2014-05-12 2016-08-24 盐城市鑫洋电热材料有限公司 A kind of preparation method of ferrum-chromium-aluminum system multi-element high-resistance electrothermal alloy

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