GB2076019A - Erosion-resistant Alloys - Google Patents

Erosion-resistant Alloys Download PDF

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Publication number
GB2076019A
GB2076019A GB8024790A GB8024790A GB2076019A GB 2076019 A GB2076019 A GB 2076019A GB 8024790 A GB8024790 A GB 8024790A GB 8024790 A GB8024790 A GB 8024790A GB 2076019 A GB2076019 A GB 2076019A
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United Kingdom
Prior art keywords
erosion
matrix
alloy
accordance
titanium carbide
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Granted
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GB8024790A
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GB2076019B (en
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Metallurgical Industries Inc
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Metallurgical Industries Inc
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Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06Metallic material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24Selection of soldering or welding materials proper
    • B23K35/32Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C
    • B23K35/327Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C comprising refractory compounds, e.g. carbides
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C29/00Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
    • C22C29/10Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on titanium carbide
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C32/00Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/0047Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
    • C22C32/0052Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides

Abstract

Alloys which are resistant to erosion, particularly iron-based, cobalt-based and nickel-based alloys, contain a sufficient concentration of titanium carbide, typically from 5% to 60% by weight, to achieve the erosion-resistance required. The alloys also have preferred particle size ranges for the titanium carbide, the metal or alloy matrix and any other component, in order to exhibit the desired erosion resistance.

Description

SPECIFICATION Erosion-resistant Alloys The invention relates to hardfacing alloys generally and is particularly concerned with hardfacing alloys having enhanced resistance to erosive wear.
In the following description, all amounts given as percentages are by weight of the total of the alloy or alloy component as the case may be.
Manganese steel consisting of 12% manganese and 1% carbon, balance iron, is commonly employed when work-hardening is both permissible and desirable. Initially, manganese steel usually has a hardness of Rb88 to 92 which, after work-hardening, increases to Rc50 to 52.
Although manganese steel exhibits sufficient resistance to various kinds of wear, such as abrasive wear and adhesive wear including galling, it is lacing in resistance to erosive wear, particularly before it has been work-hardened. It has been found that even the well-known nickel-based hardfacing alloys are lacking in resistance to erosive wear.
In one test, a well-known nickel-based hardfacing alloy, consisting of 0.5% carbon, 2.2% boron, 13.5% chromium, 3.5% silicon and 2.8% iron, balance nickel, was deposited on a substrate of manganese steel by the plasma transferred arc process.In this test, Linde's Plasma Transferred Arc System was employed at 200 amps and 30 volts, in order to deposit an overlay 3 mm (1/8 inch) thick of the hardfacing alloy on a piece of manganese steel measuring 50x50x25 mm (2 x2 x 1"). The resultant nickel-based hardfacing alloy surface was subjected to erosive wear, by impinging on it chilled cast iron grit at 4.2 Kg/cm2 (60 psig) for 4 minutes and comparing the weight loss from the erosive wear with that exhibited by a manganese steel control subjected to the same treatment.
Surprisingly, the nickel-based hardfacing alloy lost 4.5 grams, compared with a loss of only 2.8 grams by the manganese steel control.
It has now been discovered that nickel-based and other hardfacing alloys can be made which are much more resistant to erosive wear.
According to this invention, a hardfacing alloy comprises a metal or alloy matrix and titanium carbide in a concentration just sufficient to achieve the desired degree of erosive wear resistance.
In accordance with preferred features of the invention, the matrix is an iron-based alloy, a cobaltbased alloy or a nickel-based alloy.
Preferably, the titanium carbide is present in a concentration in the range from 5% to 60% by weight.
In accordance with an especially preferred embodiment of the present invention, the alloy consists of 10% to 25% of titanium carbide in a suitable matrix, preferably iron-based; such an alloy has notably enhanced erosion resistance and also exhibits low porosity and freedom from cracks, as is evidenced by the following tests.
Four test materials were employed.
Test material 1 was ordinary manganese steel plate comprising 12% manganese and 1% carbon, balance iron.
Test material 2 was an alloy comprising 1 5% titanium carbide, 7% nickel and 78% of an ironbased matrix comprising 29% chromium and 2.5% carbon, balance iron. This test material was applied to a substrate of manganese steel, measuring 50x50x25 mm (2x2"x1") by the plasma transferred arc method, as a deposit approximately 3 mm (1/8 inch) thick.
Test material 3 consisted of 50% tungsten carbide and 50% of a nickel-based matrix comprising 14% chromium, 3% boron and 4% silicon, balance nickel.
Test material 4 consisted of 20% titanium carbide, 7% nickel and 73% 316 stainless steel.
Test materials 3 and 4 were applied to manganese steel substrates in the same manner as test material 2.
The four kinds of test piece were subjected to a variety of treatments, including erosive wear, abrasive wear and hardness.
Erosive Wear Test This consisted of impinging chilled cast iron (No. 16 iron) at 4.2 Kg/cm2 (60 psig) pressure on the surface of 3 samples of each test piece (except for test material 3, only 2 pieces of which were tested) for 4 minutes and recording the weight loss for each material. The following results were obtained.
Test Material 1 2 3 4 Weight loss (g) 2.7 0.10 3.2 2.0 2.6 0.20 3.8 1.8 3.1 0.17 - 1.9 Average weight loss 2.8 0.15 3.5 1.9 The iron-based titanium carbide alloy, 2, is clearly superior to the other materials.
Abrasive Wear Test This test consisted of grinding each test sample by rotating it against a stationary steel disc in a container into which a slurry of 50 ml of water and 50 g of -140 mesh silicon carbide grit abrasive had been introduced. The test pieces were attached to a drill press actuated by a 2.3 Kg (5 Ib) load on a 15 cm (6") lever. The loaded sample was rotated at 250 rpm for 1 5 minutes. The loss of weight of the test piece was then determined.
Test Material 1 2 3 4 Weight loss (g) 1.37 0.24 1.3 0.59 1.44 0.14 1.2 0.60 These results show that the titanium carbide alloy in an iron-based matrix is clearly superior.
Hardness Test The hardness of each material was determined by the standard test method of ASTM E-78-14, Part 10-1975. The average of 5 test readings per sample are as follows.
Test Material 1 2 3 4 Hardness Rb90 Rc52 Rc52 Rc32 There was no loss in deposit hardness, as compared to the 50% tungsten carbide test material.
In order to determine the optimum concentration of titanium carbide in an iron-based matrix, hardness was determined by the same method for several alloys. The results were as follows: Alloy Composition Hardness A 10% TiC+ 12% Ni+78% Fe-Cr-C Rc48 B 15%TiC+5% Ni+80% Fe-Cr-C Rc51.5 C 25% TiC+7% Ni+68% Fe-Cr-C Rc54 D 35% TiC+ 10% Ni+55% Fe-Cr-C N.A.
E 45% TiC+ 12% Ni+43% Fe-Cr-C N.A.
The deposits for alloys D and E, containing 35% and 45% titanium carbide respectively, developed cracks and were not tested further.
Based on all available test data, an alloy consisting of 5% to 25% titanium carbide and 5% nickel, balance an iron-based alloy matrix consisting of 29% chromium, 2.8% carbon, 0.1% manganese and 0.8% silicon, balance iron, provides substantially enhanced erosive wear resistance in comparison with prior art alloys, without sacrificing other qualities.
In addition to the chemical compositions of the titanium carbide alloys of this invention it has been found that the particle size distribution of the titanium carbide preferalby is -270 mesh by down and, still preferably, from 10 to 20 ,um. With larger particle sizes, there is some loss of erosive wear resistance and, with lower particle sizes, deposit efficiency is lost and with some titanium carbide particles oxidation is experienced.
Moreover, it has been found that optimum results are obtained if the nickel component is -140 mesh and the iron-based matrix is -60+325 mesh. If the matrix is larger than 60 mesh, it will not feed well through common sizes of torch nozzles. Of course, this is not a problem if the plasma transferred arc system is not used. If the matrix powder is smaller than 325 mesh, oxidation of the matrix particles tends to occur. Here again, if the plasma transferred arc system is not employed, the smaller particle size is not a problem.
Although the tests were made on deposits applied by the plasma transferred arc system, any other fusion depositing system can be used, including oxyacetylene welding, tungsten inert gas welding (GTAQ) and plasma mig inert gas welding.
In addition to the above tests conducted on titanium carbide alloys containing an iron-based matrix, alloys having nickel-based and cobalt-based matrixes also exhibit notably enhanced erosive wear resistance.
A series of comparative tests was carried out on cobalt-based and nickel-based matrixes, in order to compare then to one another and to iron-based matrixes, without the use of additional nickel as described above. 6 different weight concentrations of titanium carbide from 5% to 60% with the balance matrix were tested. Each test alloy was deposited as a flat layer to a generally uniform thickness of 3 mm (1/8") on a 50x50x25 mm (2"x2"x1") piece of 1020 steel substrate by the use of Linde's Plasma Transferred Arc System, Model No. PT-9-H.D., at 200 amps and 30 volts. Each test plate was bombarded with chilled cast iron grit (No. 1 6) at 4.2 Kg/cm2 (6 psig) for 4 minutes and the erosive loss of weight was determined.
The compositions of the matrixes were as follows: Fe Base Co Base Ni Base C 0.12 1.2 1.9 Cr 13.00 29.0 27.0 Mn 0.50 1.0 0.15 Si 1.00 1.0 1.50 Fe Bai 3.0 10.00 W 4.5 5.20 Ni 3.0 Bal Co Bal 9.0 The matrixes had a particle size distribution of -60+325 mesh. The titanium carbide was -270 mesh by down (15 to 20 micrometres).
The hardness of each test plate was determined by a standard Rockwell hardness tester.
In this series of tests, the matrixes are well-known hardfacing alloys. The test results below demonstrate that the addition of titanium carbide to well-known hardfacing alloys greatly enhances their hardness and erosive wear resistance.
I-TiC in a Cobalt-based Matrix Deposit Deposit Loss in Weight {go Hardness Matrix 3.2 Rc37 5% TiC+95% matrix 1.8 Rc49 15% TiC+85% matrix 1.0 Rc52 25% TiC+75% matrix 0.8 Rc58 35% TiC+65% matrix 0.8 Rc62 45% TiC+55% matrix 0.4 Rc64 60%TiC+40% matrix 0.1 Rc65 Il-TiC in an Iron-based Matrix Deposit Deposit Loss in Weight(g) Hardness Matrix 2.8 Rc26 5% TiC+95% matrix 2.1 Rc34 15% TiC+85% matrix 1.5 Rc43 25% TiC+75% matrix 0.9 Rc64 35% TiC+65% matrix 0.7 Rc68 45% TiC+55% matrix 0.3 Rc69 60% TiC+40% matrix 0.4 Rc66 Ill-TiC in a Nickel-based Matrix Deposit Deposit Loss in Weight (g) Hardness Matrix 4.6 Rc31 5% TiC+95% matrix 4.6 Rc32 15% TiC+85% matrix 4.4 Rc34 25% TiC+75% matrix 4.3 Rc45 35%TiC+65% matrix 4.1 Rc50 45% TiC+55% matrix 2.9 Rc56 60% TiC+40% matrix 2.4 Rc62 The following conclusions are supported by the test data.
1. The weldability of all alloy powders was rated excellent. The powders wet out readily with substrate material (1020 steel).
2. As little as 5% TiC particles in a matrix shows substantial differences in physical properties of the deposit. The deposit hardness and erosion resistance of the deposit are enhanced.
3. Deposits having 60% of TiC particles did not crack, indicating that high amounts of carbides can be used to obtain maximum hardness and erosion resistance.
4. Different matrix materials, such as iron-based, cobalt-based and nickel-based alloys, can be used to provide erosion-resistant deposits.

Claims (12)

Claims
1. An erosion-resistant hardfacing alloy, comprising a metal or alloy matrix and titanium carbide in a concentration just sufficient to achieve the desired degree of erosive wear resistance.
2. An erosion-resistant hardfacing alloy in accordance with Claim 1, in which the matrix is an iron-based alloy.
3. An erosion-resistant hardfacing alloy in accordance with Claim 1, in which the matrix is a cobalt-based alloy.
4. An erosion-resistant hardfacing alloy in accordance with Claim 1, in which the matrix is a nickel-based alloy.
5. An erosion-resistant hardfacing alloy in accordance with any preceding claim, in which the titanium carbide is present in a concentration in the range from 5% to 60% by weight.
6. An erosion-resistant hardfacing alloy in accordance with Claim 5, in which the titanium carbide concentration is in the range from 10% to 25% by weight.
7. An erosion-resistant hardfacing alloy in accordance with-Claim 6, which contains 5% by weight of nickel, the balance comprising an iron-based alloy containing 29% of chromium, 2.8% of carbon, 0.1% of manganese and 0.8% of silicon.
8. An erosion-resistant hardfacing alloy in accordance with any preceding claim, in which the titanium carbide has a particle size distribution of -270 mesh by down.
9. An erosion-resistant hardfacing alloy in accordance with Claim 8, in which the titanium carbide has a particle size distribution in the range from 10 to 20 ym.
10. An erosion-resistant hardfacing alloy in accordance with Claim 7 or Claims 7 and 8, in which the nickel has a particle size of-140 mesh.
11. An erosion-resistant hardfacing alloy in accordance with any preceding claim, in which the matrix material has a particle size distribution of -60+325 mesh.
12. An erosion-resistant hardfacing alloy in accordance with Claim 1, substantially as hereinbefore described.
GB8024790A 1980-05-16 1980-07-29 Erosion-resistant alloys Expired GB2076019B (en)

Applications Claiming Priority (1)

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US15055880A 1980-05-16 1980-05-16

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GB2076019A true GB2076019A (en) 1981-11-25
GB2076019B GB2076019B (en) 1984-03-28

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JP (1) JPS579853A (en)
AT (1) ATA219181A (en)
BE (1) BE886269A (en)
DE (1) DE3035144A1 (en)
DK (1) DK109281A (en)
FR (1) FR2482627A1 (en)
GB (1) GB2076019B (en)
IT (1) IT1132724B (en)
NL (1) NL8004642A (en)
SE (1) SE8007443L (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3546343A1 (en) * 1985-01-09 1986-07-10 Valmet Oy, Helsinki SYNTHETIC PRESS ROLLER AND METHOD FOR THE PRODUCTION THEREOF
US4795313A (en) * 1986-05-28 1989-01-03 Alsthom Protective tip for a titanium blade and a method of brazing such a tip
US4806394A (en) * 1986-02-04 1989-02-21 Castolin S.A. Method for producing a wear-resistant, titanium-carbide containing layer on a metal base
CN104004942A (en) * 2014-05-07 2014-08-27 上海交通大学 TiC particle-reinforced nickel-based composite material and preparation method thereof
EP3137643A4 (en) * 2014-04-30 2017-09-06 Sulzer Metco (US) Inc. Titanium carbide overlay and method of making

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5038640A (en) * 1990-02-08 1991-08-13 Hughes Tool Company Titanium carbide modified hardfacing for use on bearing surfaces of earth boring bits
DE19640789C2 (en) * 1996-10-02 2002-01-31 Fraunhofer Ges Forschung Wear-resistant coated components for internal combustion engines, in particular piston rings and processes for their production

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3546343A1 (en) * 1985-01-09 1986-07-10 Valmet Oy, Helsinki SYNTHETIC PRESS ROLLER AND METHOD FOR THE PRODUCTION THEREOF
DE3546343C2 (en) * 1985-01-09 2001-03-01 Valmet Paper Machinery Inc Press roll for a paper machine and method for producing a press roll
US4806394A (en) * 1986-02-04 1989-02-21 Castolin S.A. Method for producing a wear-resistant, titanium-carbide containing layer on a metal base
US4795313A (en) * 1986-05-28 1989-01-03 Alsthom Protective tip for a titanium blade and a method of brazing such a tip
EP3137643A4 (en) * 2014-04-30 2017-09-06 Sulzer Metco (US) Inc. Titanium carbide overlay and method of making
AU2015253670B2 (en) * 2014-04-30 2019-07-18 Oerlikon Metco (Us) Inc. Titanium carbide overlay and method of making
CN104004942A (en) * 2014-05-07 2014-08-27 上海交通大学 TiC particle-reinforced nickel-based composite material and preparation method thereof
CN104004942B (en) * 2014-05-07 2017-01-11 上海交通大学 TiC particle-reinforced nickel-based composite material and preparation method thereof

Also Published As

Publication number Publication date
GB2076019B (en) 1984-03-28
FR2482627A1 (en) 1981-11-20
JPS579853A (en) 1982-01-19
BE886269A (en) 1981-03-16
DK109281A (en) 1981-11-17
SE8007443L (en) 1981-11-17
IT8024563A0 (en) 1980-09-09
ATA219181A (en) 1985-02-15
IT1132724B (en) 1986-07-02
FR2482627B3 (en) 1983-05-13
NL8004642A (en) 1981-12-16
DE3035144A1 (en) 1981-11-26

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