US20170369973A1 - Corrosion resistant cemented carbide for fluid handling - Google Patents
Corrosion resistant cemented carbide for fluid handling Download PDFInfo
- Publication number
- US20170369973A1 US20170369973A1 US15/540,816 US201515540816A US2017369973A1 US 20170369973 A1 US20170369973 A1 US 20170369973A1 US 201515540816 A US201515540816 A US 201515540816A US 2017369973 A1 US2017369973 A1 US 2017369973A1
- Authority
- US
- United States
- Prior art keywords
- cemented carbide
- composition
- hereinafter
- grain size
- defined hereinabove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 13
- 238000005260 corrosion Methods 0.000 title description 14
- 230000007797 corrosion Effects 0.000 title description 13
- 239000000203 mixture Substances 0.000 claims abstract description 85
- 229910003470 tongbaite Inorganic materials 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 description 12
- 238000005245 sintering Methods 0.000 description 7
- 238000001878 scanning electron micrograph Methods 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 150000001247 metal acetylides Chemical class 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000008240 homogeneous mixture Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys 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
- C22C29/08—Alloys 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 tungsten carbide
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys 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
- C22C29/067—Alloys 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 comprising a particular metallic binder
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
Definitions
- the present disclosure relates to cemented carbides for flow components, and more particularly to fluid handling components such as seal rings having improved service life.
- Seal rings are the key critical component in mechanical shaft seals for pumps where corrosion resistance is an issue. Cemented carbides show a good mechanical performance in this kind of application.
- cemented carbide flow components the primary function of which is to control the pressure and flow of well products, are used in, for example, the oil and gas industry where components are subjected to high pressures of multi-media fluid where there is a corrosive environment.
- a cemented carbide grade with Ni—Cr—Mo binder having improved corrosion resistance for use in choke valves is disclosed in WO2012/045815, also assigned to the assignee of the present disclosure
- thermal conductivity One of the most important properties for seal rings is thermal conductivity. This is crucial for seal rings because during the operation of a pump the friction between the seal rings generates heat. This heat needs to be conducted away; otherwise the heat will lead to a temperature increase in the sealing gap, which again can lead to evaporation of the lubricating film and dry running. Point temperatures of over 300° C. can be reached during seal ring dry running. Thus, the thermal conductivity of the seal ring material is vitally important in dissipating the temperature generated. Materials with low thermal conductivities tend to fail prematurely in service due to thermal cracking. Therefore, there is still a need for a type or grade of cemented carbide having high thermal conductivity and high corrosion resistance.
- the present disclosure therefore provides a cemented carbide composition for fluid handling components and/or seal rings comprises in wt % about balance WC; about 7-11 Ni; about 0.5 to 2.5 Cr 3 C 2 ; and about 0.5 to about 2.5 Mo.
- the cemented carbide composition as defined hereinabove or hereinafter further comprises of from 0.3 to 1.5 wt % Nb.
- the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 8.0 to about 10.1 wt % Ni.
- the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 8.0 to about 9.0 wt % Ni, such as 8.49 wt %
- the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 9.1 to about 10.1 wt % Ni, such as 9.6 wt %
- the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 0.7 to about 1.0wt % Cr 3 C 2 .
- the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 0.7 to about 0.9 wt % Cr 3 C 2 , such as 0.8 wt %
- the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 0.8 to about 1.0 wt % Cr 3 C 2 , such as 0.9 wt %.
- the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 0.7 to about 1.0wt % Mo.
- the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 0.7 to about 0.9 wt % Mo, such as 0.8 wt %.
- the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 0.8 to about 1.0 wt % Mo, such as 0.9 wt %.
- the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 88.0 to about 90.6 wt % WC.
- the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 87.9 to about 89.1 wt % WC, such as 88.6 wt %.
- the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 89.4 to about 90.5 wt % WC, such as 89.91 wt %
- the composition as defined hereinabove or hereinafter has an average grain size of from about 4 ⁇ m to about 10 ⁇ m, such as 8 ⁇ m.
- a cemented carbide for a fluid handling component or seal ring as defined hereinabove or hereinafter has a composition comprising in wt %: of 89.91% WC; of 8.49 Ni; of 0.8 Cr 3 C 2 ; and of 0.8 Mo, wherein the composition has an average grain size equal to or greater than 4 ⁇ m.
- the cemented carbide composition as defined hereinabove or hereinafter has a composition has a density of about 14.3 to about 14.7 g/cm 3 , such as about 14.4 to about 14.6 g/cm 3 .
- the cemented carbide composition as defined hereinabove or hereinafter has a density of from 14.4 to 14.6 g/cm3.
- the cemented carbide composition as defined hereinabove or hereinafter has a hardness of from 1000 to 1100 HV30.
- the cemented carbide composition as defined hereinabove or hereinafter has a toughness of from 10 to 13 MPa ⁇ m.
- a cemented carbide for a fluid handling component or seal ring as defined hereinabove or hereinafter having a composition comprising in wt % of 88.6% WC; of 9.6 Ni; of 0.9 Cr 3 C 2 ; and of 0.9 Mo, wherein the composition has an average WC grain size greater than 4 ⁇ m.
- the cemented carbide composition as defined hereinabove or hereinafter has an average WC grain size of 8 ⁇ m.
- the cemented carbide composition as defined hereinabove or hereinafter has a hardness of about 990 HV30.
- the cemented carbide composition as defined hereinabove or hereinafter has a toughness of about 12.2 MPa ⁇ m.
- the cemented carbide composition as defined hereinabove or hereinafter has a density of 14.4 g/cm 3 .
- the cemented carbide composition as defined hereinabove or hereinafter has an average WC grain size of 4 ⁇ m.
- the cemented carbide composition as defined hereinabove or hereinafter has a hardness of 1290 HV30.
- the cemented carbide composition as defined hereinabove or hereinafter has a toughness of about 11.6 MPa ⁇ m.
- FIG. 1 is an SEM image of an embodiment of cemented carbide for a flow component or seal ring.
- FIG. 2 is an SEM image of another embodiment of cemented carbide for a flow component or a seal ring.
- FIG. 3 is an SEM image of another embodiment of cemented carbide for a flow component or a seal ring.
- FIG. 4 is an SEM image of another embodiment of cemented carbide for a flow component or a seal ring.
- the term “about” means plus or minus 10% of the numerical value of the number with which it is being used. Therefore, about 50% means in the range of 45%-55%.
- embodiments of the present disclosure relate to cemented carbides for flow components (herein, the term “component” means parts or pieces), particularly for seal rings used in the oil and gas industry, where the components are subjected to high pressures of multi-media fluid and where there is a corrosive environment. Under severe conditions of multi flow media; these components may suffer from extreme mass loss by exposure to solid particle erosion, acidic corrosion erosion-corrosion synergy and cavitation mechanisms even when fitted with cemented carbide trims.
- Seal rings are the key critical component in mechanical shaft seals for pumps.
- the seal rings act as barriers in pumps (i.e., to separate liquids and confine pressure) by preventing leakage and excluding contamination.
- Cemented carbide shows a good mechanical performance in this kind of application.
- the cemented carbide seal rings of the present disclosure have improved application relevant properties, such as improved corrosion resistance.
- the carbon content within the sintered cemented carbide should be kept within a narrow range in order to retain a high resistance to corrosion and wear, as well as have a high toughness.
- the carbon level of the sintered structure is held in the lower portion of the range between free carbon in the microstructure (top limit) and eta-phase initiation (bottom limit).
- a cemented carbide for seal rings (CR) according to an embodiment the present disclosure has a composition in weight percent % of about balance WC; 7-11 Ni; 0.5-2.5 Cr 3 C 2 ; and Mo of about 0.5 to about 2.5.
- a cemented carbide grade with the composition in wt-% of about 88.6 WC; about 0.9 Cr 3 C 2 ; about 0.9 Mo; and about 9.6 Ni was producing using WC powder with an average FSSS (Fisher Sub Sieve Sizer) particle size (d50) of greater than about 0.5 ⁇ m, for example, about 4 to about 8.
- the cemented carbide samples were prepared from powders forming the hard constituents and powders forming the binder. The powders were wet milled together with lubricant and anti-flocculating agent until a homogeneous mixture was obtained and granulated by drying. The dried powder was pressed on the Tox press to bodies and ‘green machined’ before sintering.
- Sintering was performed at 1360-1410° C. for about 1 hour in vacuum, followed by applying a high pressure, 50 bar Argon, at sintering temperature for about 30 minutes to obtain a dense structure before cooling.
- the sintered structure is shown in FIG. 1 with a grain size of 0.8 ⁇ m.
- FIG. 2 is an SEM image of the sintered structure with a grain size of 4 ⁇ m.
- FIG. 3 is an SEM image of the sintered structure with a grain size of 8 ⁇ m.
- the cemented carbide samples were prepared from powders forming the hard constituents and powders forming the binder. The powders were wet milled together with lubricant and anti-flocculating agent until a homogeneous mixture was obtained and granulated by drying. The dried powder was pressed on the Tox press to bodies and ‘green machined’ before sintering. Sintering was performed at 1360-1410° C. for about 1 hour in vacuum, followed by applying a high pressure, 50 bar Argon, at sintering temperature for about 30 minutes to obtain a dense structure before cooling. The sintered structure with a grain size of 8 ⁇ m is shown in FIG. 4 .
- the composition mentioned has the following properties: density: 14.4-14.6 g/cm3; hardness HV30: 1000-1100 and toughness K1C: 10-13 MPa ⁇ m.
- thermal conductivity As discussed supra, one of the key properties for seal rings is thermal conductivity.
- One way to increase thermal conductivity is to increase the average WC grain size. Thermal conductivity was measured between a cemented carbide grade of 88.6% WC, 9.6% Nicke1,0.9% Cr 3 C 2 and 0.9% Mo having an average WC grain size of 0.8 ⁇ m. As shown in Table 3 below, the higher the grain size the higher the thermal conductivity.
- a cemented carbide for a fluid handling component or seal ring having a composition comprising in wt %:
- cemented carbide of item 1 wherein the composition further comprises of from 0.3 to 1.5 wt % Nb.
- a cemented carbide for a fluid handling component or seal ring having a composition comprising in wt %:
- a cemented carbide for a fluid handling component or seal ring having a composition comprising in wt %:
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Powder Metallurgy (AREA)
- Earth Drilling (AREA)
- Coating By Spraying Or Casting (AREA)
- Ceramic Products (AREA)
Abstract
Description
- The present disclosure relates to cemented carbides for flow components, and more particularly to fluid handling components such as seal rings having improved service life.
- Seal rings are the key critical component in mechanical shaft seals for pumps where corrosion resistance is an issue. Cemented carbides show a good mechanical performance in this kind of application.
- Similarly, cemented carbide flow components, the primary function of which is to control the pressure and flow of well products, are used in, for example, the oil and gas industry where components are subjected to high pressures of multi-media fluid where there is a corrosive environment. A cemented carbide grade with Ni—Cr—Mo binder having improved corrosion resistance for use in choke valves is disclosed in WO2012/045815, also assigned to the assignee of the present disclosure
- One of the most important properties for seal rings is thermal conductivity. This is crucial for seal rings because during the operation of a pump the friction between the seal rings generates heat. This heat needs to be conducted away; otherwise the heat will lead to a temperature increase in the sealing gap, which again can lead to evaporation of the lubricating film and dry running. Point temperatures of over 300° C. can be reached during seal ring dry running. Thus, the thermal conductivity of the seal ring material is vitally important in dissipating the temperature generated. Materials with low thermal conductivities tend to fail prematurely in service due to thermal cracking. Therefore, there is still a need for a type or grade of cemented carbide having high thermal conductivity and high corrosion resistance.
- It is an aspect of the present disclosure to provide a cemented carbide for fluid handling components and for a seal ring, all of which having improved corrosion resistance.
- The present disclosure therefore provides a cemented carbide composition for fluid handling components and/or seal rings comprises in wt % about balance WC; about 7-11 Ni; about 0.5 to 2.5 Cr3C2; and about 0.5 to about 2.5 Mo.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter further comprises of from 0.3 to 1.5 wt % Nb.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 8.0 to about 10.1 wt % Ni.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 8.0 to about 9.0 wt % Ni, such as 8.49 wt %
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 9.1 to about 10.1 wt % Ni, such as 9.6 wt %
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 0.7 to about 1.0wt % Cr3C2.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 0.7 to about 0.9 wt % Cr3C2, such as 0.8 wt %
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 0.8 to about 1.0 wt % Cr3C2, such as 0.9 wt %.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 0.7 to about 1.0wt % Mo.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 0.7 to about 0.9 wt % Mo, such as 0.8 wt %.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 0.8 to about 1.0 wt % Mo, such as 0.9 wt %.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 88.0 to about 90.6 wt % WC.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 87.9 to about 89.1 wt % WC, such as 88.6 wt %.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a composition comprising from about 89.4 to about 90.5 wt % WC, such as 89.91 wt %
- In an embodiment, the composition as defined hereinabove or hereinafter has an average grain size of from about 4 μm to about 10 μm, such as 8 μm.
- In an embodiment, a cemented carbide for a fluid handling component or seal ring as defined hereinabove or hereinafter, has a composition comprising in wt %: of 89.91% WC; of 8.49 Ni; of 0.8 Cr3C2; and of 0.8 Mo, wherein the composition has an average grain size equal to or greater than 4 μm.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a composition has a density of about 14.3 to about 14.7 g/cm3, such as about 14.4 to about 14.6 g/cm3.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a density of from 14.4 to 14.6 g/cm3.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a hardness of from 1000 to 1100 HV30.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a toughness of from 10 to 13 MPa·√m.
- In an embodiment, a cemented carbide for a fluid handling component or seal ring as defined hereinabove or hereinafter, the cemented carbide having a composition comprising in wt % of 88.6% WC; of 9.6 Ni; of 0.9 Cr3C2; and of 0.9 Mo, wherein the composition has an average WC grain size greater than 4 μm.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has an average WC grain size of 8 μm.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a hardness of about 990 HV30.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a toughness of about 12.2 MPa·√m.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a density of 14.4 g/cm3.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has an average WC grain size of 4 μm.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a hardness of 1290 HV30.
- In an embodiment, the cemented carbide composition as defined hereinabove or hereinafter has a toughness of about 11.6 MPa·√m.
- The foregoing summary, as well as the following detailed description of the embodiments, will be better understood when read in conjunction with the appended drawings. It should be understood that the embodiments depicted are not limited to the precise arrangements and instrumentalities shown.
-
FIG. 1 is an SEM image of an embodiment of cemented carbide for a flow component or seal ring. -
FIG. 2 is an SEM image of another embodiment of cemented carbide for a flow component or a seal ring. -
FIG. 3 is an SEM image of another embodiment of cemented carbide for a flow component or a seal ring. -
FIG. 4 is an SEM image of another embodiment of cemented carbide for a flow component or a seal ring. - As used herein, the term “about” means plus or minus 10% of the numerical value of the number with which it is being used. Therefore, about 50% means in the range of 45%-55%.
- As will be described fully herein, embodiments of the present disclosure relate to cemented carbides for flow components (herein, the term “component” means parts or pieces), particularly for seal rings used in the oil and gas industry, where the components are subjected to high pressures of multi-media fluid and where there is a corrosive environment. Under severe conditions of multi flow media; these components may suffer from extreme mass loss by exposure to solid particle erosion, acidic corrosion erosion-corrosion synergy and cavitation mechanisms even when fitted with cemented carbide trims.
- Seal rings are the key critical component in mechanical shaft seals for pumps. The seal rings act as barriers in pumps (i.e., to separate liquids and confine pressure) by preventing leakage and excluding contamination. Cemented carbide shows a good mechanical performance in this kind of application.
- The cemented carbide seal rings of the present disclosure have improved application relevant properties, such as improved corrosion resistance. The carbon content within the sintered cemented carbide should be kept within a narrow range in order to retain a high resistance to corrosion and wear, as well as have a high toughness. The carbon level of the sintered structure is held in the lower portion of the range between free carbon in the microstructure (top limit) and eta-phase initiation (bottom limit).
- Conventional powder metallurgical methods, such as (but not limited to) milling, drying, pressing, shaping, sintering and sinter hipping, which are used for manufacture of conventional cemented carbides are used to manufacture embodiments of the present disclosure.
- A cemented carbide for seal rings (CR) according to an embodiment the present disclosure has a composition in weight percent % of about balance WC; 7-11 Ni; 0.5-2.5 Cr3C2; and Mo of about 0.5 to about 2.5.
- It should be appreciated that the following examples are illustrative, non-limiting examples. The compositions and results of the embodiments are shown in Tables 1 and 2 below.
-
-
TABLE 1 Ref A B C Sample CR seal ring CR seal ring CR seal ring WC 88.6 88.6 89.91 WC grain size (μm) 4 8 8 TiC (wt %) 0 0 0 Co (wt %) 0 0 0 Ni (wt %) 9.6 9.6 8.49 Mo (wt %) 0.9 0.9 0.8 Cr3C2 (wt %) 0.9 0.9 0.8 -
TABLE 2 Ref A B C Sample CR seal CR seal ring CR seal ring ring Density (gm/cm3) 14.4 14.4 14.4-14.6 Hardness (Hv30) 1290 990 1000-1100 Toughness (K1c) 11.6 12.2 10.0-13.0
In the examples below the powders were sourced from the following suppliers: (W,Ti)C from Zhuzhou or HC Starck, Co from Umicore or Freeport, Ni from Inco, Mo from HC Starck and Cr3C2 from Zhuzhou or HC Starck - A cemented carbide grade with the composition in wt-% of about 88.6 WC; about 0.9 Cr3C2; about 0.9 Mo; and about 9.6 Ni was producing using WC powder with an average FSSS (Fisher Sub Sieve Sizer) particle size (d50) of greater than about 0.5 μm, for example, about 4 to about 8. The cemented carbide samples were prepared from powders forming the hard constituents and powders forming the binder. The powders were wet milled together with lubricant and anti-flocculating agent until a homogeneous mixture was obtained and granulated by drying. The dried powder was pressed on the Tox press to bodies and ‘green machined’ before sintering. Sintering was performed at 1360-1410° C. for about 1 hour in vacuum, followed by applying a high pressure, 50 bar Argon, at sintering temperature for about 30 minutes to obtain a dense structure before cooling. The sintered structure is shown in
FIG. 1 with a grain size of 0.8 μm. - Referring to Table 2, with WC grain size of about 4 μm has a hardness HV30 of about 1290 and a toughness of K1C 11.6 MPa·√m. With WC grain size of about 8 μm the harness HV30 is about 990 and the toughness K1C IS 12.2 MPa·√m. It can be observed that when the coarser raw material is used (4 or 8 μm) the hardness is reduced and the toughness increased.
FIG. 2 is an SEM image of the sintered structure with a grain size of 4 μm.FIG. 3 is an SEM image of the sintered structure with a grain size of 8 μm. - A cemented carbide grade with the compositions in wt-% of about 89.91 WC; about 0.8 Cr3C2; about 0.8 Mo; and about 8.49 Ni and was produced using WC powder with an average FSSS particle size (d50) of greater than about about 4 μm and/or about 8 μm. The cemented carbide samples were prepared from powders forming the hard constituents and powders forming the binder. The powders were wet milled together with lubricant and anti-flocculating agent until a homogeneous mixture was obtained and granulated by drying. The dried powder was pressed on the Tox press to bodies and ‘green machined’ before sintering. Sintering was performed at 1360-1410° C. for about 1 hour in vacuum, followed by applying a high pressure, 50 bar Argon, at sintering temperature for about 30 minutes to obtain a dense structure before cooling. The sintered structure with a grain size of 8 μm is shown in
FIG. 4 . - The composition mentioned has the following properties: density: 14.4-14.6 g/cm3; hardness HV30: 1000-1100 and toughness K1C: 10-13 MPa·√m. The grades disclosed herein demonstrate improved corrosion resistance in comparison to a standard seal ring grade. Corrosion resistance was determined using a modified test to ASTM G61. ASTM G61 covers a procedure for conducting potential dynamic polarization measurements. The modification of this standard has been in the media used. Instead of using 3.5% NaCl solution in the tests, artificial seawater according to ASTM D1141 was used as the media. Furthermore, the flushed port cell used in ASTM G61 was replaced by sealing the specimen with epoxy to avoid crevice corrosion on the edge of the sample. The pitting potential was used as a measure for comparison. The higher the value, the better is the corrosion resistance of the material. The value measured for a standard seal ring grade was Epit=263 mV SCE. However, for the above CR grade the Epit=443 mV SCE showing improved corrosion resistance.
- As discussed supra, one of the key properties for seal rings is thermal conductivity. One way to increase thermal conductivity is to increase the average WC grain size. Thermal conductivity was measured between a cemented carbide grade of 88.6% WC, 9.6% Nicke1,0.9% Cr3C2 and 0.9% Mo having an average WC grain size of 0.8 μm. As shown in Table 3 below, the higher the grain size the higher the thermal conductivity.
-
TABLE 3 Thermal conductivity (W/(mK)) Temperature (° C.) Choke valve grade A Room temperature 46 85 200 53 80 401 53 72 1000 55 62 - 1. A cemented carbide for a fluid handling component or seal ring, the cemented carbide having a composition comprising in wt %:
-
- a balance of WC;
- of 7-11 Ni;
- of 0.5-2.5 Cr3C2; and
- of 0.5-2.5 Mo,
- wherein the composition has an average WC grain size greater than 4 μm.
- 2. The cemented carbide of item 1, wherein the composition further comprises of from 0.3 to 1.5 wt % Nb.
- 3. The cemented carbide of items 1 or 2, wherein the composition has an average grain size of 8 μm.
- 4. A cemented carbide for a fluid handling component or seal ring, the cemented carbide having a composition comprising in wt %:
-
- of 89.91% WC;
- of 8.49 Ni;
- of 0.8 Cr3C2; and
- of 0.8 Mo,
- wherein the composition has an average grain size greater than 4 μm.
- 5. The cemented carbide of item 4, wherein the composition has an average grain size of 8 μm.
- 6. The cemented carbide of
item 4 or 5, wherein the composition has a density of from 14.4 to 14.6 g/cm3. - 7. The cemented carbide of any of items 4-6, wherein the composition has a hardness of from 1000 to 1100 HV30.
- 8. The cemented carbide of any of items 4-7, wherein the composition has a toughness of from 10 to 13 MPa·√m.
- 9. A cemented carbide for a fluid handling component or seal ring, the cemented carbide having a composition comprising in wt %:
-
- of 88.6% WC;
- of 9.6 Ni;
- of 0.9 Cr3C2; and
- of 0.9 Mo,
- wherein the composition has an average WC grain size greater than 4 μm.
- 10. The cemented carbide of item 9, wherein the composition has an average WC grain size of 8 μm.
- 11. The cemented carbide of items 9 or 10, wherein the composition has a hardness of from 990 HV30.
- 12. The cemented carbide of any of items 9-11, wherein the composition has a toughness of from 12.2 MPa·√m.
- 13. The cemented carbide of any of items 9-12, wherein the composition has a density of from 14.4 g/cm3.
- 14. The cemented carbide of item 9, wherein the composition has an average WC grain size of 4 μm.
- 15. The cemented carbide of
item 9 or 14, wherein the composition has a hardness of from 1290 HV30. - 16. The cemented carbide of any of
items 9, 14 or 15, wherein the composition has a toughness of about 11.6 MPa·√m. - Although the present embodiments have been described in relation to particular aspects thereof, many other variations and modifications and other uses will become apparent to those skilled in the art. It is preferred therefore, that the present embodiment(s) be limited not by the specific disclosure herein, but only by the appended claims.
Claims (16)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/540,816 US20170369973A1 (en) | 2014-12-30 | 2015-12-28 | Corrosion resistant cemented carbide for fluid handling |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201462098211P | 2014-12-30 | 2014-12-30 | |
US15/540,816 US20170369973A1 (en) | 2014-12-30 | 2015-12-28 | Corrosion resistant cemented carbide for fluid handling |
PCT/EP2015/081283 WO2016107842A1 (en) | 2014-12-30 | 2015-12-28 | Corrosion resistant cemented carbide for fluid handling |
Publications (1)
Publication Number | Publication Date |
---|---|
US20170369973A1 true US20170369973A1 (en) | 2017-12-28 |
Family
ID=55085635
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/540,816 Abandoned US20170369973A1 (en) | 2014-12-30 | 2015-12-28 | Corrosion resistant cemented carbide for fluid handling |
Country Status (8)
Country | Link |
---|---|
US (1) | US20170369973A1 (en) |
EP (1) | EP3240917A1 (en) |
AU (1) | AU2015373451A1 (en) |
CA (1) | CA2970583A1 (en) |
MX (1) | MX2017008636A (en) |
RU (1) | RU2689456C2 (en) |
SG (1) | SG11201704719RA (en) |
WO (1) | WO2016107842A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020128688A1 (en) * | 2018-12-18 | 2020-06-25 | Hyperion Materials & Technologies (Sweden) Ab | Cemented carbide for high demand applications |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR112018076212B1 (en) * | 2016-06-23 | 2022-12-20 | Hyperion Materials & Technologies (Sweden) Ab | METAL FORMING TOOL COMPRISING A CEMENTED CARBIDE COMPOSITION |
CN112359260B (en) * | 2020-11-25 | 2021-12-28 | 株洲硬质合金集团有限公司 | Hard alloy anvil as well as preparation method and application thereof |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE512668C2 (en) * | 1997-09-05 | 2000-04-17 | Sandvik Ab | Ways to manufacture a corrosion resistant cemented carbide |
SE523821C2 (en) * | 2002-10-25 | 2004-05-18 | Sandvik Ab | Carbide for oil and gas applications |
US6911063B2 (en) * | 2003-01-13 | 2005-06-28 | Genius Metal, Inc. | Compositions and fabrication methods for hardmetals |
EP2653580B1 (en) * | 2008-06-02 | 2014-08-20 | Kennametal Inc. | Cemented carbide-metallic alloy composites |
EP2439300A1 (en) * | 2010-10-08 | 2012-04-11 | Sandvik Intellectual Property AB | Cemented carbide |
CN102400027A (en) * | 2011-10-21 | 2012-04-04 | 四川科力特硬质合金股份有限公司 | Sea water corrosion resistant hard alloy and preparation method thereof |
EP2607512B1 (en) * | 2011-12-21 | 2017-02-22 | Sandvik Intellectual Property AB | Method of making a cemented carbide |
CN102517484A (en) * | 2011-12-26 | 2012-06-27 | 四川科力特硬质合金股份有限公司 | N300 hard alloy and preparation method thereof |
US10363595B2 (en) * | 2014-06-09 | 2019-07-30 | Hyperion Materials & Technologies (Sweden) Ab | Cemented carbide necking tool |
-
2015
- 2015-12-28 US US15/540,816 patent/US20170369973A1/en not_active Abandoned
- 2015-12-28 AU AU2015373451A patent/AU2015373451A1/en not_active Abandoned
- 2015-12-28 WO PCT/EP2015/081283 patent/WO2016107842A1/en active Application Filing
- 2015-12-28 CA CA2970583A patent/CA2970583A1/en not_active Abandoned
- 2015-12-28 MX MX2017008636A patent/MX2017008636A/en unknown
- 2015-12-28 EP EP15823339.5A patent/EP3240917A1/en not_active Withdrawn
- 2015-12-28 SG SG11201704719RA patent/SG11201704719RA/en unknown
- 2015-12-28 RU RU2017127055A patent/RU2689456C2/en active
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020128688A1 (en) * | 2018-12-18 | 2020-06-25 | Hyperion Materials & Technologies (Sweden) Ab | Cemented carbide for high demand applications |
US11655525B2 (en) | 2018-12-18 | 2023-05-23 | Hyperion Materials & Technologies (Sweden) Ab | Cemented carbide for high demand applications |
JP7483712B2 (en) | 2018-12-18 | 2024-05-15 | ハイペリオン マテリアルズ アンド テクノロジーズ (スウェーデン) アクティエボラーグ | Hardmetal for demanding applications |
Also Published As
Publication number | Publication date |
---|---|
MX2017008636A (en) | 2017-10-11 |
CA2970583A1 (en) | 2016-07-07 |
WO2016107842A1 (en) | 2016-07-07 |
RU2017127055A (en) | 2019-01-31 |
RU2689456C2 (en) | 2019-05-28 |
RU2017127055A3 (en) | 2019-03-28 |
AU2015373451A1 (en) | 2017-06-29 |
EP3240917A1 (en) | 2017-11-08 |
SG11201704719RA (en) | 2017-07-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20170369973A1 (en) | Corrosion resistant cemented carbide for fluid handling | |
US9272320B2 (en) | Cemented carbide punch | |
US9453271B2 (en) | Cemented carbide | |
WO2018206174A1 (en) | Cemented carbides comprising an fe-cr binder based metallic binder | |
US20180002783A1 (en) | Light weight cemented carbide for flow erosion components | |
US6878181B2 (en) | Cemented carbide for oil and gas applications with toughness factor | |
KR101717347B1 (en) | Copper based sintered alloy with wear resistance | |
CN113166860B (en) | Cemented carbide for demanding applications | |
RU2331685C2 (en) | Antifrictional composite powdered material | |
US11655525B2 (en) | Cemented carbide for high demand applications | |
RU2245386C1 (en) | Composite powder material for friction assembly | |
Pérez-Velásquez et al. | Influence of compaction pressure in steel composites AISI 316reinforced with titanium carbide against wear | |
JP5105460B2 (en) | Method of manufacturing wear-resistant member and plastic mold using the wear-resistant member |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SANDVIK HYPERION AB, SWEDEN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SANDVIK INTELLECTUAL PROPERTY AKTIEBOLAG;REEL/FRAME:046762/0435 Effective date: 20171231 |
|
AS | Assignment |
Owner name: HYPERION MATERIALS & TECHNOLOGIES (SWEDEN) AB, SWEDEN Free format text: CHANGE OF NAME;ASSIGNOR:SANDVIK HYPERION AB;REEL/FRAME:048085/0327 Effective date: 20181121 Owner name: HYPERION MATERIALS & TECHNOLOGIES (SWEDEN) AB, SWE Free format text: CHANGE OF NAME;ASSIGNOR:SANDVIK HYPERION AB;REEL/FRAME:048085/0327 Effective date: 20181121 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NON FINAL ACTION MAILED |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |