CN105506474A - Carbide-enhanced type invar alloy wire and preparing method thereof - Google Patents
Carbide-enhanced type invar alloy wire and preparing method thereof Download PDFInfo
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- CN105506474A CN105506474A CN201610014564.XA CN201610014564A CN105506474A CN 105506474 A CN105506474 A CN 105506474A CN 201610014564 A CN201610014564 A CN 201610014564A CN 105506474 A CN105506474 A CN 105506474A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
Abstract
The invention relates to a carbide-enhanced type invar alloy wire and a preparing method thereof. The wire is mainly prepared from, by mass, 0.05-0.2% of C, 34-38% of Ni, smaller than or equal to 0.005% of S, smaller than or equal to 0.005% of P, 0.015-0.04% of Al, 0.1-3.5% of carbide forming elements and the balance Fe and inevitable impurities. The preparing method comprises the steps that the alloy components are prepared into a cast ingot through smelting and casting of a vacuum melting furnace, the cast ingot is forged into a round stick, the round stick is subjected to hot rolling to form a wire rod, the wire rod is subjected to cold drawing to form a wire body, and the wire body is subjected to aging heat treatment, surface acid pickling, surface finishing and other procedures. The carbide-enhanced type invar alloy wire and the preparing method thereof have the advantages that alloy raw materials are saved, the technological process is simplified, and production cost is reduced. The tensile strength of the produced alloy wire is higher than or equal to 1000 MPa, the coefficient of thermal expansion within the range of minus 100-200 DEG C is smaller than or equal to 2.6*10<-6>/DEG C, and the performance requirement of up-rating wire core products is met.
Description
Technical field
The invention belongs to Metallic Functional Materials technical field, be specifically related to a kind of carbide enhancement type Invar alloy wire rod and preparation method thereof.
Background technology
Nickeliferous massfraction is the iron-nickel alloy (also known as Invar alloy) of 36%, extremely low thermal expansivity can be shown lower than Curie temperature, in fields such as precision instrument, electronic industry, aerospace, there is huge using value, be make indicating meter shadow mask, critical material that thrermostatic bimetal-plate, glass capsulation draw the products such as silk, microwave resonator, precise laser parts, liquify natural gas and liquid oxygen storage tank.
It is to be noted, specify that the alloying constituent (% by weight) in 4J36 category is: C≤0.05% in " YB/T5241-2005 low bulk iron nickel, fernico " standard, Ni:35 ~ 37%, Mn:0.2 ~ 0.6%, Si≤0.3%, S≤0.02%, P≤0.02%, all the other are Fe and inevitable impurity.Rely on the 4J36 alloy that this chemical composition is produced, the tensile strength under room temperature, less than 500MPa, can only use as functional materials for a long time, is difficult to the performance requriements being applicable to bearing structured material effect under the new situation.
In recent years, along with power industry is to the active demand of large capacity transmission wire, greatly promote with Invar alloy (also known as invar) be core parts the greatly developing of aluminium bag invar steel core superalloy twisted wire (double capacity conductor).Meanwhile, conventional Fe-36Ni Invar alloy (4J36) is after the art breading such as smelting, forging, gren rod, cold-drawn, its wire strength still can not, more than 1000MPa, be difficult to meet the rigors of these specialty products to Invar alloy mechanical property.Just based on this technical background, research high strength Invar alloy also prepares the high strength Invar alloy wire rod meeting double capacity conductor product and use, and is more and more subject to the attention of research institution and enterprise.
At present, the usual way of development high strength Invar alloy wire rod is, with Fe-36Ni alloy for matrix, adds the object of carbon and carbide forming element realization raising alloy strength simultaneously, and through cold work, the tensile strength of final wire product is generally at about 1300MPa; If wish the tensile strength improving material further, then need to utilize intermetallic compound intensifying technology, now, the tensile strength of Invar alloy wire rod can reach more than 1500MPa.Such as:
Granted patent ZL200510029930.0, December 31 2008 mandate time, name is called the Chinese patent literature of " production method of a kind of high strength Invar alloy and alloy wire thereof ", by adding W, V and the such carbide forming element of a small amount of Mo in Fe-36Ni alloy substrate simultaneously, adopt the method for double carbide strengthening, after cold work, the tensile strength>=1300MPa of this Invar alloy wire rod, and linear expansivity α
20 ~ 240 DEG C≤ 2.5 × 10
-6/ DEG C;
Granted patent ZL200610117443.4, September 2 2009 mandate time, name is called " alloy wire and manufacture method thereof that a kind of Fe-36Ni is base ", by adding Mo and Nb carbide forming element in matrix simultaneously, the technical thought utilizing double carbide to strengthen equally, this alloy wire, after cold drawing process, can realize tensile strength>=1300MPa, linear expansivity α
20 ~ 230 DEG C≤ 3.0 × 10
-6/ DEG C.
Granted patent ZL201110201300.2, authorize October 29 2014 time, name is called " a kind of high-strength low-expansion coefficient alloy wire and manufacture method thereof ", utilizes Ni
3the dispersion-strengthened action of (Ti, Al) relative austenitic matrix, the wire rod tensile strength>=1500MPa after cold drawn process, meanwhile, average coefficient of linear expansion α≤3.5 × 10 in 20 ~ 100 DEG C of temperature ranges
-6/ DEG C.
Above-mentioned Chinese patent or the precipitation strength of employing carbide compound, or adopt intermetallic compound precipitation strength, and through cold work, the tensile strength of Invar alloy wire rod can be made to reach more than 1300MPa.And some is required it is not extra high product to intensity index, how controlling at more than 1000MPa by the tensile strength of Invar alloy wire rod, Research Literature is paid close attention to less.
Summary of the invention
The object of this invention is to provide a kind of carbide enhancement type Invar alloy wire rod and preparation method thereof, especially as a times high strength Invar alloy wire rod for capacity transmission wire load steel core.The present invention take Fe-36Ni as matrix, strictly control S, P element content, by adding separately the one of Mo, Cr, Ti, Nb, W, V element, making the intensity of this alloy wire at more than 1000MPa, but being no more than 1200MPa.
The technical solution used in the present invention is as follows: a kind of carbide enhancement type Invar alloy wire rod, described Invar alloy wire rod chemical composition and mass percent are: C:0.05 ~ 0.2%, Ni:34 ~ 38%, S≤0.005%, P≤0.005%, Al:0.015 ~ 0.04%, carbide forming element: 0.1 ~ 3.5%, all the other are Fe and inevitable impurity.
Carbide forming element of the present invention and chemical weight percent are Mo:0.5 ~ 2.5%.
Carbide forming element of the present invention and chemical weight percent are Cr:1.5 ~ 3.5%.
Carbide forming element of the present invention and chemical weight percent are Nb:0.2 ~ 0.8%.
Carbide forming element of the present invention and chemical weight percent are Ti:0.1 ~ 0.5%.
Carbide forming element of the present invention and chemical weight percent are V:0.15 ~ 0.85%.
Carbide forming element of the present invention and chemical weight percent are W:0.35 ~ 1.05%.
The present invention also provides a kind of preparation method of a kind of carbide enhancement type Invar alloy wire rod described above, and concrete steps are as follows:
(1) described alloying constituent is smelted through vacuum melting furnace, poured into ingot casting;
(2) ingot casting is heated to 1200 ~ 1300 DEG C, insulation 3 ~ 7h, is forged into pole;
(3) pole is rolled into Ф 6 ~ 10mm wire rod;
(4) wire rod is through the solution treatment of 1100 ~ 1200 DEG C, then the cold work of carrying out 50 ~ 80% deflections becomes wire rod;
(5) alloy wire is inserted the cleanup acid treatment of carrying out surface scale in pickle solution;
(6) further in finishing machine enterprising line material surface finish operation, described carbide enhancement type Invar alloy wire rod is obtained.
Wire rod in step of the present invention (4) carries out ageing treatment, and described ageing treatment step can be carried out before cold working step, also can carry out after cold working step, and aging temp is 600 ~ 700 DEG C, and aging time is 3 ~ 5h.
In step of the present invention (3), the initial temperature of pole course of hot rolling is 1150 ~ 1250 DEG C, and rolling finishing temperature is 900 ~ 1000 DEG C.
Technological principle of the present invention:
Ingot casting carries out 1200 ~ 1300 DEG C, and insulation 3 ~ 7h process is carry out element Homogenization Treatments on the one hand, ensures that alloy element can be dispersed in austenitic matrix in ingot casting; On the other hand, eliminate the unrelieved stress in ingot casting, reduce the probability that surface cracking appears in operation of rolling ingot casting, improve pole lumber recovery and improve surface quality; The initial temperature of pole course of hot rolling is 1150 ~ 1250 DEG C, and rolling finishing temperature is 900 ~ 1000 DEG C, thus carbide can be avoided to separate out along austenite grain boundary or at intra-die in rolling wire rod process; Gren rod carries out the solution treatment of 1100 ~ 1200 DEG C again, that a small amount of carbide in order to make the wire rod operation of rolling separate out is dissolved in austenitic matrix again, reduce the quantity of residual carbon compound on austenitic matrix, thus be conducive to cold-drawn wire rod after ageing treatment, separated out a large amount of carbide particles; For making the final alloy wire obtained, there is higher physical strength, the wire rod of an employing cold-drawn process must be made to have larger cold deformation, larger cold deformation is conducive to the quantity, the increase dislocation desity that improve cold-drawn fibrous tissue, thus ensures the comprehensive mechanical property of alloy hand-drawn wire material; The aging temperature selected and time, both can ensure that can carbide fully separate out from austenitic matrix, be conducive to again the size controlling Carbide Precipitation particle, be unlikely to cause excessively growing up of precipitated phase particle, in addition, also helping the plasticity improving hand-drawn wire material, is ensure that final alloy wire has the gordian technique of stable mechanical property.
Composition Design thinking of the present invention is as follows:
C:C is the essential element of carbide precipitate strengthening phase, carbon content is too much, the thermal expansivity of Integral alloy can be improved, carbon content is too low, strengthening effect is not obvious, obtain through computation optimization, according to different carbide forming element additions, the optimum controling range of carbon content should between 0.05 ~ 0.2%.
Ni:Ni ensures that alloy has the essential element of single austenitic matrix and low bulk performance, and Ni content controls in the scope of 34 ~ 38%, and alloy can be made under the condition of adding strengthening element to keep low-expansion coefficient.
Mo:Mo forms strong carbide precipitated phase Mo
2the important element of C, for making Mo and C fully combine, and strengthening effect finds full expression, and the content of Mo should control at 0.5 ~ 2.5% range level.
Cr:Cr forms Cr
23c
6the important element of precipitated phase, because the bonding strength between Cr and C is relatively weak, for making Cr fully separate out, the content of Cr should control at 1.5 ~ 3.5% range level.
Nb:Nb is carbide, and the strengthening effect of NbC in Invar alloy is the most obvious, and a small amount of Nb addition, can play good strengthening effect; But Nb content is too much, is unfavorable for Solid solution precipitation, can not plays the effect of precipitation strength, so the content of Nb should control at 0.2 ~ 0.8% range level.
Ti:Ti is also carbide, Ti is easy to be combined with C, separate out in ingot casting, form first TiC precipitated phase, this precipitate size is larger, and be not easy to be solid-solution in austenite completely, to raising strengthening without any effect, so, separate out after solid solution for making Ti, its content should be not too high, preferably controls at 0.1 ~ 0.5% range level.
V:V is carbide, and V and C combines, and forms VC precipitated phase, because VC Solid solution precipitation temperature is lower, easily separate out from austenite, strengthening effect effect is comparatively obvious, so, under given C content condition, V content should be not too high, preferably controls at 0.15 ~ 0.85% range level.
W:W is weak carbide forming element, and W and C combines, and forms WC precipitated phase, because WC is the precipitated phase that hardness is very high, for reinforced alloys matrix, there is remarkable effect, so, W content is also not easily too high, and in this alloy, the optimum control level of W is 0.35 ~ 1.05% scope.
Al:Al is effective reductor, and control Al content, 0.015 ~ 0.04%, can play good desoxydatoin, without the need to adding Mn, Si in alloy.Therefore, add the deoxidation object that Al can realize alloy, Mn, Si can be avoided again the disadvantageous effect of thermal expansivity.
The preparation method of a kind of carbide enhancement type Invar alloy wire rod of the present invention is as follows:
Beneficial effect of the present invention is, adopt aximal deformation value cold work in conjunction with the precipitation strength effect of single-phase carbide particle, both the responsible thermal treatment process having avoided complex phase Carbide Precipitation process to adopt and cold deformation technique, reduce again the consumption to carbide reinforced element, not only save alloy raw material, in turn simplify technical process and production cost.In addition, chemical composition of the present invention and preparation were established, contribute to obtaining mechanical property just above the alloy wire product of 1000MPa, avoid mechanical property over-redundancy, supplement the region that currently available products mechanical property is ignored.Alloy wire tensile strength>=1000MPa that the present invention obtains, the thermalexpansioncoefficientα within the scope of-100 ~ 200 DEG C
-100 ~ 200 DEG C≤ 2.5 × 10
-6/ DEG C, meet the application requiring of remote conveying electrical lead.
Embodiment
Below in conjunction with specific embodiment, the present invention is further detailed explanation.
The present invention carries out 18 stove embodiments altogether and smelts, and 6 stove comparative examples are smelted.Table 1 provide the embodiment of the present invention and comparative example obtain product chemical composition and performance perameter.
Embodiment 1
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps are as follows:
(1) described alloying constituent is smelted through vacuum melting furnace, poured into ingot casting;
(2) ingot casting is heated to 1200 DEG C, insulation 7h, is forged into pole;
(3) pole is rolled into Ф 8mm wire rod, the initial temperature of course of hot rolling is 1150 DEG C, and rolling finishing temperature is 900 DEG C;
(4) wire rod is through the solution treatment of 1150 DEG C, then the cold work of carrying out 55% deflection becomes wire rod;
Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out before cold working step, and aging temp is 700 DEG C, and aging time is 3h;
(5) alloy wire is inserted the cleanup acid treatment of carrying out surface scale in pickle solution;
(6) further in finishing machine enterprising line material surface finish operation, carbide enhancement type Invar alloy wire rod is obtained.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 2
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps are as follows:
(1) described alloying constituent is smelted through vacuum melting furnace, poured into ingot casting;
(2) ingot casting is heated to 1250 DEG C, insulation 5h, is forged into pole;
(3) pole is rolled into Ф 10mm wire rod, the initial temperature of course of hot rolling is 1200 DEG C, and rolling finishing temperature is 950 DEG C;
(4) wire rod is through the solution treatment of 1200 DEG C, then the cold work of carrying out 50% deflection becomes wire rod;
Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out before cold working step, and aging temp is 600 DEG C, and aging time is 5h;
(5) alloy wire is inserted the cleanup acid treatment of carrying out surface scale in pickle solution;
(6) further in finishing machine enterprising line material surface finish operation, carbide enhancement type Invar alloy wire rod is obtained.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 3
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps are as follows:
(1) described alloying constituent is smelted through vacuum melting furnace, poured into ingot casting;
(2) ingot casting is heated to 1300 DEG C, insulation 3h, is forged into pole;
(3) pole is rolled into Ф 6mm wire rod, the initial temperature of course of hot rolling is 1250 DEG C, and rolling finishing temperature is 1000 DEG C;
(4) wire rod is through the solution treatment of 1100 DEG C, then the cold work of carrying out 65% deflection becomes wire rod;
Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out after cold working step, and aging temp is 650 DEG C, and aging time is 4.0h;
(5) alloy wire is inserted the cleanup acid treatment of carrying out surface scale in pickle solution;
(6) further in finishing machine enterprising line material surface finish operation, carbide enhancement type Invar alloy wire rod is obtained.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 4
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps and embodiment 1 are distinguished and are only: step (4) wire rod is through the solution treatment of 1100 DEG C, then the cold work of carrying out 58% deflection becomes wire rod; Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out after cold working step, and aging temp is 640 DEG C, and aging time is 4.7h.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 5
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps and embodiment 1 are distinguished and are only: step (4) wire rod is through the solution treatment of 1150 DEG C, then the cold work of carrying out 67% deflection becomes wire rod; Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out after cold working step, and aging temp is 670 DEG C, and aging time is 4.3h.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 6
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps and embodiment 1 are distinguished and are only: step (4) wire rod is through the solution treatment of 1100 DEG C, then the cold work of carrying out 80% deflection becomes wire rod; Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out after cold working step, and aging temp is 690 DEG C, and aging time is 3.7h.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 7
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps and embodiment 1 are distinguished and are only: step (4) wire rod is through the solution treatment of 1180 DEG C, then the cold work of carrying out 56% deflection becomes wire rod; Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out after cold working step, and aging temp is 630 DEG C, and aging time is 3.8h.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 8
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps and embodiment 1 are distinguished and are only: step (4) wire rod is through the solution treatment of 1145 DEG C, then the cold work of carrying out 63% deflection becomes wire rod; Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out after cold working step, and aging temp is 670 DEG C, and aging time is 4.3h.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 9
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps and embodiment 1 are distinguished and are only: step (4) wire rod is through the solution treatment of 1195 DEG C, then the cold work of carrying out 74% deflection becomes wire rod; Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out after cold working step, and aging temp is 600 DEG C, and aging time is 5.0h.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 10
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps and embodiment 1 are distinguished and are only: step (4) wire rod is through the solution treatment of 1125 DEG C, then the cold work of carrying out 63% deflection becomes wire rod; Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out after cold working step, and aging temp is 680 DEG C, and aging time is 3.6h.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 11
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps and embodiment 1 are distinguished and are only: step (4) wire rod is through the solution treatment of 1130 DEG C, then the cold work of carrying out 74% deflection becomes wire rod; Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out after cold working step, and aging temp is 630 DEG C, and aging time is 4.3h.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 12
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps and embodiment 1 are distinguished and are only: step (4) wire rod is through the solution treatment of 1138 DEG C, then the cold work of carrying out 59% deflection becomes wire rod; Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out after cold working step, and aging temp is 650 DEG C, and aging time is 4.0h.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 13
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps and embodiment 1 are distinguished and are only: step (4) wire rod is through the solution treatment of 1126 DEG C, then the cold work of carrying out 50% deflection becomes wire rod; Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out after cold working step, and aging temp is 625 DEG C, and aging time is 3.9h.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 14
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps and embodiment 1 are distinguished and are only: step (4) wire rod is through the solution treatment of 1155 DEG C, then the cold work of carrying out 57% deflection becomes wire rod; Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out after cold working step, and aging temp is 645 DEG C, and aging time is 4.3h.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 15
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps and embodiment 1 are distinguished and are only: step (4) wire rod is through the solution treatment of 1165 DEG C, then the cold work of carrying out 64% deflection becomes wire rod; Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out after cold working step, and aging temp is 683 DEG C, and aging time is 4.5h.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 16
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps and embodiment 1 are distinguished and are only: step (4) wire rod is through the solution treatment of 1105 DEG C, then the cold work of carrying out 59% deflection becomes wire rod; Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out after cold working step, and aging temp is 623 DEG C, and aging time is 3.4h.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 17
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps and embodiment 1 are distinguished and are only: step (4) wire rod is through the solution treatment of 1120 DEG C, then the cold work of carrying out 63% deflection becomes wire rod; Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out after cold working step, and aging temp is 667 DEG C, and aging time is 3.9h.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Embodiment 18
A preparation method for carbide enhancement type Invar alloy wire rod, concrete steps and embodiment 1 are distinguished and are only: step (4) wire rod is through the solution treatment of 1110 DEG C, then the cold work of carrying out 71% deflection becomes wire rod; Wire rod in described step (4) carries out ageing treatment, and described ageing treatment step can be carried out after cold working step, and aging temp is 700 DEG C, and aging time is 4.5h.
Carbide enhancement type Invar alloy wire rod chemical composition and performance perameter are in table 1.
Comparative example 1
A preparation method for Invar alloy wire rod, concrete steps are identical with embodiment 1.
Invar alloy wire rod chemical composition and performance perameter are in table 1.
Comparative example 2
A preparation method for Invar alloy wire rod, concrete steps are identical with embodiment 2.
Invar alloy wire rod chemical composition and performance perameter are in table 1.
Comparative example 3
A preparation method for Invar alloy wire rod, concrete steps are identical with embodiment 3.
Invar alloy wire rod chemical composition and performance perameter are in table 1.
Comparative example 4
A preparation method for Invar alloy wire rod, concrete steps are identical with embodiment 4.
Invar alloy wire rod chemical composition and performance perameter are in table 1.
Comparative example 5
A preparation method for Invar alloy wire rod, concrete steps are identical with embodiment 5.
Invar alloy wire rod chemical composition and performance perameter are in table 1.
Comparative example 6
A preparation method for Invar alloy wire rod, concrete steps are identical with embodiment 6.
Invar alloy wire rod chemical composition and performance perameter are in table 1.
From table 1 result, implement 18 stove Invar alloy wire rods of the present invention, all can obtain good physical strength (Rm>1000MPa), and lower hot expansibility (<2.5 × 10
-6dEG C
-1), even and if comparative example 1-6 in identical process parameters range, its tensile strength can not meet the requirement of high strength.
As shown in Table 1, alloying constituent of the present invention, cold-drawn and aging technique parameter are defined in specified range, for obtaining stable high-strength mechanical properties and low-expansion coefficient is all vital.But the production method of alloy wire is not limited in the scope of the embodiment of the present invention, if the carbide forming element of other composition is after operational path of the present invention, still can obtain similar performance, all within the technical scope of the present invention's protection.
Table 1: the chemical composition (wt%) of hot rolling Invar alloy and performance perameter in each embodiment
| Embodiment | Ni | C | S | P | V | Nb | Ti | Mo | Cr | W | Al | Tensile strength/MPa | Thermal expansivity/10 of-100 ~ 200 DEG C -6℃ -1 |
| 1 | 35.3 | 0.13 | 0.0035 | 0.0032 | / | / | / | 2.1 | / | / | 0.023 | 1075 | 2.4 |
| 2 | 36.2 | 0.15 | 0.0036 | 0.0033 | / | / | / | 1.5 | / | / | 0.026 | 1068 | 2.5 7 --> |
| 3 | 36.4 | 0.11 | 0.0037 | 0.0035 | / | / | / | 1.3 | / | / | 0.035 | 1082 | 2.2 |
| 4 | 37.2 | 0.16 | 0.0033 | 0.0039 | / | / | / | / | 2.0 | / | 0.033 | 1036 | 2.2 |
| 5 | 35.7 | 0.09 | 0.0035 | 0.0031 | / | / | / | / | 2.5 | / | 0.029 | 1068 | 2.4 |
| 6 | 35.8 | 0.13 | 0.0038 | 0.0033 | / | / | / | / | 3.0 | / | 0.015 | 1049 | 2.1 |
| 7 | 35.9 | 0.14 | 0.0036 | 0.0034 | / | 0.3 | / | / | / | / | 0.024 | 1020 | 1.9 |
| 8 | 35.0 | 0.08 | 0.0050 | 0.0040 | / | 0.5 | / | / | / | / | 0.028 | 1051 | 2.3 |
| 9 | 34.0 | 0.08 | 0.0032 | 0.0022 | / | 0.7 | / | / | / | / | 0.036 | 1033 | 2.2 |
| 10 | 36.5 | 0.13 | 0.0039 | 0.0050 | / | / | 0.2 | / | / | / | 0.040 | 1019 | 2.3 |
| 11 | 34.7 | 0.05 | 0.0027 | 0.0031 | / | / | 0.3 | / | / | / | 0.021 | 1031 | 2.1 |
| 12 | 35.5 | 0.09 | 0.0043 | 0.0039 | / | / | 0.4 | / | / | / | 0.018 | 1023 | 1.8 |
| 13 | 35.8 | 0.11 | 0.0025 | 0.0038 | 0.25 | / | / | / | / | / | 0.027 | 1042 | 2.2 |
| 14 | 36.2 | 0.14 | 0.0028 | 0.0043 | 0.45 | / | / | / | / | / | 0.022 | 1029 | 2.5 |
| 15 | 36.8 | 0.17 | 0.0026 | 0.0035 | 0.75 | / | / | / | / | / | 0.031 | 1038 | 2.1 |
| 16 | 36.7 | 0.13 | 0.0035 | 0.0030 | / | / | / | / | / | 0.55 | 0.034 | 1047 | 2.2 |
| 17 | 37.1 | 0.15 | 0.0035 | 0.0032 | / | / | / | / | / | 0.75 | 0.035 | 1028 | 2.4 |
| 18 | 38.0 | 0.20 | 0.0033 | 0.0038 | / | / | / | / | / | 0.95 | 0.029 | 1033 | 2.3 |
| Comparative example 1 | 36.35 | 0.093 | 0.01 | 0.006 | 1.03 | 0.030 | 920 | 2.5 | |||||
| Comparative example 2 | 36.12 | 0.095 | 0.0035 | 0.0025 | 1.5 | 0.029 | 896 | 1.7 | |||||
| Comparative example 3 | 36.37 | 0.098 | 0.0035 | 0.0025 | 0.2 | 0.031 | 924 | 2.3 | |||||
| Comparative example 4 | 36.53 | 0.101 | 0.0037 | 0.0024 | 0.1 | 0.030 | 936 | 2.8 | |||||
| Comparative example 5 | 36.33 | 0.102 | 0.0037 | 0.0027 | 0.15 | 0.033 | 902 | 3.1 | |||||
| Comparative example 6 | 36.28 | 0.099 | 0.0036 | 0.0031 | 0.4 | 0.034 | 885 | 2.9 |
Claims (10)
1. a carbide enhancement type Invar alloy wire rod, it is characterized in that, described Invar alloy wire rod chemical composition and mass percent are: C:0.05 ~ 0.2%, Ni:34 ~ 38%, S≤0.005%, P≤0.005%, Al:0.015 ~ 0.04%, carbide forming element: 0.1 ~ 3.5%, all the other are Fe and inevitable impurity.
2. a kind of carbide enhancement type Invar alloy wire rod according to claim 1 and preparation method thereof, it is characterized in that, described carbide forming element and chemical weight percent are Mo:0.5 ~ 2.5%.
3. a kind of carbide enhancement type Invar alloy wire rod according to claim 1 and preparation method thereof, it is characterized in that, described carbide forming element and chemical weight percent are Cr:1.5 ~ 3.5%.
4. a kind of carbide enhancement type Invar alloy wire rod according to claim 1 and preparation method thereof, it is characterized in that, described carbide forming element and chemical weight percent are Nb:0.2 ~ 0.8%.
5. a kind of carbide enhancement type Invar alloy wire rod according to claim 1 and preparation method thereof, it is characterized in that, described carbide forming element and chemical weight percent are Ti:0.1 ~ 0.5%.
6. a kind of carbide enhancement type Invar alloy wire rod according to claim 1 and preparation method thereof, it is characterized in that, described carbide forming element and chemical weight percent are V:0.15 ~ 0.85%.
7. a kind of carbide enhancement type Invar alloy wire rod according to claim 1 and preparation method thereof, it is characterized in that, described carbide forming element and chemical weight percent are W:0.35 ~ 1.05%.
8. the preparation method of a kind of carbide enhancement type Invar alloy wire rod as described in claim 1 ~ 7 any one, it is characterized in that, concrete steps are as follows:
(1) described alloying constituent is smelted through vacuum melting furnace, poured into ingot casting;
(2) ingot casting is heated to 1200 ~ 1300 DEG C, insulation 3 ~ 7h, is forged into pole;
(3) pole is rolled into Ф 6 ~ 10mm wire rod;
(4) wire rod is through the solution treatment of 1100 ~ 1200 DEG C, then the cold work of carrying out 50 ~ 80% deflections becomes wire rod;
(5) alloy wire is inserted the cleanup acid treatment of carrying out surface scale in pickle solution;
(6) further in finishing machine enterprising line material surface finish operation, described carbide enhancement type Invar alloy wire rod is obtained.
9. preparation method according to claim 8, it is characterized in that, wire rod in described step (4) carries out ageing treatment, described ageing treatment step can be carried out before cold working step, also can carry out after cold working step, aging temp is 600 ~ 700 DEG C, and aging time is 3 ~ 5h.
10. preparation method according to claim 8, is characterized in that, in described step (3), the initial temperature of pole course of hot rolling is 1150 ~ 1250 DEG C, and rolling finishing temperature is 900 ~ 1000 DEG C.
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