CN101892423A - Cu-containing Fe-Ni stainless steel alloy - Google Patents
Cu-containing Fe-Ni stainless steel alloy Download PDFInfo
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- CN101892423A CN101892423A CN 201010242084 CN201010242084A CN101892423A CN 101892423 A CN101892423 A CN 101892423A CN 201010242084 CN201010242084 CN 201010242084 CN 201010242084 A CN201010242084 A CN 201010242084A CN 101892423 A CN101892423 A CN 101892423A
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- alloy
- corrosion
- stainless steel
- steel alloy
- seawater
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- 229910001030 Iron–nickel alloy Inorganic materials 0.000 title claims abstract description 17
- 229910001256 stainless steel alloy Inorganic materials 0.000 title claims abstract description 13
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims description 17
- 239000000470 constituent Substances 0.000 claims description 8
- 238000005275 alloying Methods 0.000 claims description 7
- 239000000956 alloy Substances 0.000 abstract description 77
- 229910045601 alloy Inorganic materials 0.000 abstract description 65
- 238000005260 corrosion Methods 0.000 abstract description 43
- 230000007797 corrosion Effects 0.000 abstract description 42
- 239000013535 sea water Substances 0.000 abstract description 21
- 239000000463 material Substances 0.000 abstract description 9
- 230000036314 physical performance Effects 0.000 abstract 1
- 239000010949 copper Substances 0.000 description 53
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 45
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 30
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 16
- 239000000203 mixture Substances 0.000 description 13
- 239000006104 solid solution Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 230000003628 erosive effect Effects 0.000 description 8
- 238000011156 evaluation Methods 0.000 description 8
- 239000011780 sodium chloride Substances 0.000 description 8
- 238000011056 performance test Methods 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- 238000002844 melting Methods 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- 229910018054 Ni-Cu Inorganic materials 0.000 description 2
- 229910018481 Ni—Cu Inorganic materials 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910003286 Ni-Mn Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a Cu-containing Fe-Ni stainless steel alloy, which belongs to the technical field of new materials. The Cu-containing Fe-Ni stainless steel alloy is characterized by comprising the following alloy elements in weight percentage: 30.0 to 48.0 percent of Fe, 2.0 to 4.3 percent of Ni and the balance of Cu. The performance indexes of the material are as follows: alloy hardness Hv is 1.26 to 1.40GPa; and corrosion performance parameters comprise a free corrosion potential E of 0.382 to 0.288V below zero, a free corrosion current density i of 0.72 to 1.17 muAcm(-2), and a corrosion rate R of 7.63 to 13.37mum/year. The Cu-containing Fe-Ni stainless steel alloy has the advantage of stable single-phase face-centered cubic (FCC) structure, high physical performance and high seawater corrosion resistance, is a low-cost novel stainless steel alloy and can be widely applied to structural materials of seawater corrosion resistant large-scale projects.
Description
Technical field
The invention belongs to new material technology field, relate to a kind of copper bearing new sections nickel and stainless steel, can be used for the corrosion resistant material of seawater.
Background technology
The stainless steel of industrial circle widespread use can be divided into by contained main component difference: Cr-Ni-Mn series, Cr-Ni series, Cr series, low Cr series, Stainless Steel Alloy mainly is to improve performance by a large amount of alloying modes at present, the weight percentage of Fe element is between the 50-70%, expensive alloy element such as Cr, Ni, Mo, Mn, Nb, V, Ti, Cu weight percentage sum have reached 30-50%, have improved stainless production cost greatly.Studies show that: Cu, Ni influence the element that the alloy corrosion current potential is shuffled strongly, but the Fe-Ni alloy material is applied to field of functional materials always, and the Fe-Ni structured material that contains Cu yet there are no report with Stainless Steel Alloy.
From the influence angle of element for structure, Ni, Cu all are constituent elements of stablizing γ-Fe FCC structure in ferrous alloy, and the atomic percentage conc of Ni need reach 31% when forming stable γ-Fe FCC structure; From the alloy material performance perspective, Ni, Cu are the elements that the stainless steel corrosion potential is shuffled strongly in the seawater; From the thermodynamics angle, Fe, the enthalpy of mixing of Ni is for negative, in alloy, form neighbour's structure easily, Ni, the Cu enthalpy of mixing is being for just, but smaller, can form neighbour's structure in alloy, Fe, the Cu enthalpy of mixing is for just, bigger, in alloy, can not form neighbour's structure, the content control of Cu is improper, cause segregation easily, and even the separation of phase, thereby the single FCC phase composite of destruction stainless steel base forms polyphase alloy, in the material military service process, different corrosion potentials in seawater there are differences, and must form a large amount of galvanic cells, quicken its corrosion speed in seawater.So in seawater, have the stainless steel of good solidity to corrosion, single-phase γ-Fe FCC structure, must guarantee the content of Ni element, thereby guarantee and improve the content of Cu, and will keep suitable ratio between the Ni, Cu content.Be exactly the present invention is by the content of suitable raising Ni, thereby raising Cu content total finally improve Ni in the Stainless Steel Alloy, Cu body burden, finally reaches and improves stainless corrosion resistance nature.
Summary of the invention
The purpose of this invention is to provide the novel stainless Steel Alloy material that a kind of cost is relatively low, structure is stable, plasticity is better, the seawater corrosion resistance ability is stronger, solve assurance that existing seawater exists with the stainless steel alloy material technology high anti-corrosion can prerequisite under, the content height of valuable alloying constituent element, the deficiency that production cost is higher.
The technical solution used in the present invention is: comprise Fe, Ni and Cu element, the weight percent of its alloying constituent is Fe-(30.0-48.0%) Ni-(2.0-4.3%) Cu.
The design that realizes technique scheme is: utilize contriver's " cluster+connection atom " structural models to design the Fe-Ni-Cu alloying constituent." cluster+connection atom " structural models solid solution structure can be regarded as by cluster be connected atom two portions and constitute, and can provide empirical formula [cluster] (connection atom) x.In γ-iron FCC structural alloy, cluster is the heart with part solute atoms Ni, and 12 Fe atoms occupy the CN12 polyhedron cluster that first shell forms, and solute atoms Cu and part of atoms Ni are for being connected atom.Solute occupies cluster heart portion and still depends on and interaction between solute element and the Fe element be embodied in the enthalpy of mixing size as connecting atom.Ni and Fe have less negative enthalpy of mixing, and part solute atoms Ni occupies cluster heart portion, and residue Ni atom can be used as the connection atom, and Cu and Fe enthalpy of mixing are for just, as connecting atom.Therefore, in the Fe-Ni-Cu system, because Ni and Fe have negative enthalpy of mixing, definition Ni occupies the cluster central position; Cu and Fe have bigger positive enthalpy of mixing, and definition Cu is as connecting atom; In order to guarantee that Cu is dissolved in the Fe alloy, substitute the portion C u atom with the Ni atom, guarantee that Fe, Cu separate.Given thus cluster empirical formula is [NiFe
12] (Cu
YNi
1-Y)
X,, change into weight percent then according to this empirical formula design alloying constituent.The principle of design is mainly to utilize Ni guaranteeing that alloy is on the basis of single γ-iron FCC structure solid solution alloy, improves the content of Cu, thereby improves the content of Ni, Cu in the alloy, makes stainless steel have good sea water corrosion resistant.
Composition alloy employing high purity constituent element element of the present invention alloying constituent by weight percentage carries out proportioning; Utilize non-consumable arc-melting furnace mixture to proportioning under the Ar gas shiled to carry out repeatedly melting then, to obtain the uniform alloy pig of composition, utilize the fast cold technology of copper mold that alloy pig is prepared into the alloy bar of diameter for 6mm then, and under 1050 ℃ of high temperature, be incubated 4 hours, carry out Water Quenching then, as the test sample; Utilize XRD (CuK
αRadiation, λ=0.15406nm) detect alloy structure with TEM; Carried out hardness test with Vickers hardness tester; The last high Cl of simulated seawater
-(3.5wt.%NaCl) environment at room temperature utilizes electrochemical workstation to carry out the corrosion resisting property evaluation of alloy material, determines the height that interalloy of the present invention has the seawater corrosion resistance ability thus.γ-iron alloy the composition that contains Cu is Fe-(30.0-48.0%) Ni-(2.0-4.3%) Cu (weight percent), and material performance index is: alloy rigidity Hv=1.26～1.40GPa; The corrosive nature parameter area is respectively: corrosion potential E=-0.382～-0.288V, from corrosion electric current density i=0.72～1.17 μ Acm
-2, erosion rate R=7.63～13.37 μ m/.
Effect of the present invention and benefit are: it is good that the Fe-Ni base alloy that contains Cu that is provided has stable single-phase FCC structure, good mechanical properties, anti-sea water corrosion resistant, be class novel stainless Steel Alloy with low cost, can be widely used in the heavy construction structured material of seawater corrosion resistance.
Embodiment
Be described in detail the specific embodiment of the present invention below in conjunction with technical scheme.
Embodiment 1Ni
32.9Fe
64.7Cu
2.4Alloy
Step 1: alloy preparation
Ni
32.9Fe
64.7Cu
2.4Alloy, this composition are derived from cluster formula [NiFe
12] (Cu
0.08Ni
0.92)
5.2Fe, Ni, Cu pure metal are prepared burden according to given weight alloy per-cent composition; Compound is placed in the water jacketed copper crucible of arc-melting furnace, adopts the non-consumable arc melting method to carry out melting under the protection of argon gas, so melt back is 7 times, obtains the uniform alloy pig of composition; Then the uniform alloy pig of melting is melted at last, and utilize copper mold technology that melt is sucked in the cylindrical, copper model cavity, obtain the bar that diameter is 6mm; And under 1050 ℃ of high temperature, be incubated 4 hours, carry out Water Quenching then.
Step 2: alloy structure and performance test
Utilize XRD and TEM to detect alloy structure, be defined as single FCC γ-iron solid solution structure; Carried out hardness test with Vickers hardness tester, alloy rigidity Hv=1.26GPa; The high Cl of simulated seawater
-(3.5wt.%NaCl) environment at room temperature utilizes electrochemical workstation to carry out the corrosion resisting property evaluation of alloy material, and its corrosive nature parameter area is respectively: corrosion potential E=-0.363V, and from corrosion electric current density i=0.87 μ Acm
-2, erosion rate R=9.88 μ m/.
Embodiment 2Ni
36.2Fe
61.0Cu
2.8Alloy
Step 1: alloy preparation
Ni
36.2Fe
61.0Cu
2.8Alloy, this composition are derived from cluster formula [NiFe
12] (Cu
0.08Ni
0.92)
6.2With the step 1 among the embodiment one.
Step 2: alloy structure and performance test
Utilize XRD and TEM to detect alloy structure, be defined as single FCC γ-iron solid solution structure; Carried out hardness test with Vickers hardness tester, alloy rigidity Hv=1.28GPa; The high Cl of simulated seawater
-(3.5wt.%NaCl) environment at room temperature utilizes electrochemical workstation to carry out the corrosion resisting property evaluation of alloy material, and its corrosive nature parameter area is respectively: corrosion potential E=-0.316V, and from corrosion electric current density i=0.99 μ Acm
-2, erosion rate R=11.48 μ m/.
Embodiment 3Fe
55.0Ni
41.7Cu
3.3Alloy
Step 1: alloy preparation
Fe
55.0Ni
41.7Cu
3.3Alloy, this composition are derived from cluster formula [NiFe
12] (Cu
0.08Ni
0.92)
8.1With the step 1 among the embodiment one.
Step 2: alloy structure and performance test
Utilize XRD and TEM to detect alloy structure, be defined as single FCC γ-iron solid solution structure; Carried out hardness test with Vickers hardness tester, alloy rigidity Hv=1.31GPa; The high Cl of simulated seawater
-(3.5wt.%NaCl) environment at room temperature utilizes electrochemical workstation to carry out the corrosion resisting property evaluation of alloy material, and its corrosive nature parameter area is respectively: corrosion potential E=-0.335V, and from corrosion electric current density i=1.00 μ Acm
-2, erosion rate R=11.46 μ m/.
Embodiment 4Fe
48.9Ni
47.2Cu
3.9Alloy
Step 1: alloy preparation
Fe
48.9Ni
47.2Cu
3.9Alloy, this composition are derived from cluster formula [NiFe
12] (Cu
0.08Ni
0.92)
10.8With the step 1 among the embodiment one.
Step 2: alloy structure and performance test
Utilize XRD and TEM to detect alloy structure, be defined as single FCC γ-iron solid solution structure; Carried out hardness test with Vickers hardness tester, alloy rigidity Hv=1.33GPa; The high Cl of simulated seawater
-(3.5wt.%NaCl) environment at room temperature utilizes electrochemical workstation to carry out the corrosion resisting property evaluation of alloy material, and its corrosive nature parameter area is respectively: corrosion potential E=-0.289V, and from corrosion electric current density i=1.03 μ Acm
-2, erosion rate R=11.93 μ m/.
Embodiment 5Fe
57.0Ni
40.9Cu
2.1Alloy
Step 1: alloy preparation
Fe
57.0Ni
40.9Cu
2.1Alloy, this composition are derived from cluster formula [NiFe
12] (Cu
0.05Ni
0.95)
7.6With the step 1 among the embodiment one.
Step 2: alloy structure and performance test
Utilize XRD and TEM to detect alloy structure, be defined as single FCC γ-iron solid solution structure; Carried out hardness test with Vickers hardness tester, alloy rigidity Hv=1.24GPa; The high Cl of simulated seawater
-(3.5wt.%NaCl) environment at room temperature utilizes electrochemical workstation to carry out the corrosion resisting property evaluation of alloy material, and its corrosive nature parameter area is respectively: corrosion potential E=-0.289V, and from corrosion electric current density i=0.65 μ Acm
-2, erosion rate R=7.63 μ m/.
Embodiment 6Fe
56.6Ni
40.7Cu
2.7Alloy
Step 1: alloy preparation
Fe
56.6Ni
40.7Cu
2.7Alloy, this composition are derived from cluster formula [NiFe
12] (Cu
0.06Ni
0.94)
7.7With the step 1 among the embodiment one.
Step 2: alloy structure and performance test
Utilize XRD and TEM to detect alloy structure, be defined as single FCC γ-iron solid solution structure; Carried out hardness test with Vickers hardness tester, alloy rigidity Hv=1.28GPa; The high Cl of simulated seawater
-(3.5wt.%NaCl) environment at room temperature utilizes electrochemical workstation to carry out the corrosion resisting property evaluation of alloy material, and its corrosive nature parameter area is respectively: corrosion potential E=-0.322V, and from corrosion electric current density i=0.94 μ Acm
-2, erosion rate R=10.77 μ m/.
Embodiment 7Fe
56.3Ni
40.5Cu
3.2Alloy
Step 1: alloy preparation
Fe
56.3Ni
40.5Cu
3.2Alloy, this composition are derived from cluster formula [NiFe
12] (Cu
0.08Ni
0.92)
7.8With the step 1 among the embodiment one.
Step 2: alloy structure and performance test
Utilize XRD and TEM to detect alloy structure, be defined as single FCC γ-iron solid solution structure; Carried out hardness test with Vickers hardness tester, alloy rigidity Hv=1.30GPa; The high Cl of simulated seawater
-(3.5wt.%NaCl) environment at room temperature utilizes electrochemical workstation to carry out the corrosion resisting property evaluation of alloy material, and its corrosive nature parameter area is respectively: corrosion potential E=-0.311V, and from corrosion electric current density i=0.84 μ Acm
-2, erosion rate R=9.53 μ m/.
Claims (1)
1. Fe-Ni Stainless Steel Alloy that contains Cu, it is characterized in that: it comprises Fe, Ni and Cu element, the weight percent of its alloying constituent is Fe-(30.0-48.0%) Ni-(2.0-4.3%) Cu.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010242084 CN101892423A (en) | 2010-07-29 | 2010-07-29 | Cu-containing Fe-Ni stainless steel alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010242084 CN101892423A (en) | 2010-07-29 | 2010-07-29 | Cu-containing Fe-Ni stainless steel alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101892423A true CN101892423A (en) | 2010-11-24 |
Family
ID=43101767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010242084 Pending CN101892423A (en) | 2010-07-29 | 2010-07-29 | Cu-containing Fe-Ni stainless steel alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101892423A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103938081A (en) * | 2013-12-09 | 2014-07-23 | 谢廷声 | Nickel-copper-iron alloy used for steel making and a preparation method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125778A (en) * | 1994-12-27 | 1996-07-03 | 陕西钢铁研究所 | Iron-nickel-copper series new-type thermal magnetic alloy |
-
2010
- 2010-07-29 CN CN 201010242084 patent/CN101892423A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125778A (en) * | 1994-12-27 | 1996-07-03 | 陕西钢铁研究所 | Iron-nickel-copper series new-type thermal magnetic alloy |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103938081A (en) * | 2013-12-09 | 2014-07-23 | 谢廷声 | Nickel-copper-iron alloy used for steel making and a preparation method |
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Open date: 20101124 |