CN114776675A - Sheath WC-Co hard alloy stud for cast-in and manufacturing method thereof - Google Patents
Sheath WC-Co hard alloy stud for cast-in and manufacturing method thereof Download PDFInfo
- Publication number
- CN114776675A CN114776675A CN202210439109.XA CN202210439109A CN114776675A CN 114776675 A CN114776675 A CN 114776675A CN 202210439109 A CN202210439109 A CN 202210439109A CN 114776675 A CN114776675 A CN 114776675A
- Authority
- CN
- China
- Prior art keywords
- hard alloy
- steel pipe
- stud
- pipe sleeve
- sheath
- 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.)
- Pending
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 89
- 239000000956 alloy Substances 0.000 title claims abstract description 89
- 229910009043 WC-Co Inorganic materials 0.000 title claims abstract description 83
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 51
- 239000010959 steel Substances 0.000 claims abstract description 51
- 238000005266 casting Methods 0.000 claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000009987 spinning Methods 0.000 claims abstract description 8
- 230000007704 transition Effects 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000009792 diffusion process Methods 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 3
- 238000002844 melting Methods 0.000 claims abstract 2
- 230000008018 melting Effects 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 11
- 239000011159 matrix material Substances 0.000 claims description 7
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 239000000155 melt Substances 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B4/00—Shrinkage connections, e.g. assembled with the parts at different temperature; Force fits; Non-releasable friction-grip fastenings
- F16B4/004—Press fits, force fits, interference fits, i.e. fits without heat or chemical treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal
Abstract
The invention relates to a sheath WC-Co hard alloy stud for insert casting and a manufacturing method thereof, wherein the WC-Co hard alloy stud for insert casting is pressed into a steel pipe sleeve in an interference fit manner, two ends of the steel pipe sleeve are in tight contact with two ends of the WC-Co hard alloy stud through spinning plastic deformation, and two ends of the steel pipe sleeve are sealed; the steel pipe sleeve tightly and hermetically sleeved on the surface of the WC-Co hard alloy stud is used for preventing the metal liquid cast in from directly contacting the surface of the WC-Co hard alloy stud, so that the phenomenon that the metal liquid melts the surface of the WC-Co hard alloy stud and a transition region with a brittle phase is formed on an interface between WC-Co hard alloy and a substrate is avoided, solid diffusion welding is formed between the WC-Co hard alloy stud and the steel pipe sleeve under the heating of the metal liquid cast in, and the steel pipe sleeve is formed in a metallurgical bonding manner by melting a low-melting-point alloy coating coated on the surface of the steel pipe sleeve and the substrate through the metal liquid cast in.
Description
Technical Field
The invention discloses a sheath WC-Co hard alloy stud for insert casting and a manufacturing method thereof, and the application of the stud relates to a wear-resistant material composite casting technology, belonging to the technical field of material forming and control.
Background
In the process of casting the WC-Co hard alloy stud, a transition region of a brittle phase is formed on the surface of the WC-Co hard alloy stud through molten metal fusion on an interface between the WC-Co hard alloy and a substrate, the strength of the transition region is low, the tissue stress and the thermal stress in the casting-in process and the heat treatment process are large, so that the transition region generates cracks and even interface cracks, the WC-Co hard alloy stud loses the holding and supporting force of the substrate in the use process, the WC-Co hard alloy stud is mainly in a failure mode of fracture and breakage, and the effect of improving the wear-resisting service life of a wear-resisting part by utilizing the wear resistance of the WC-Co hard alloy cannot be achieved.
The invention relates to a sheath WC-Co hard alloy stud for insert casting and a manufacturing method thereof, wherein the WC-Co hard alloy stud for insert casting is pressed into a steel pipe sleeve in an interference fit manner, two ends of the steel pipe sleeve are in tight contact with two ends of the WC-Co hard alloy stud through spinning plastic deformation, and two ends of the steel pipe sleeve are sealed; the steel pipe sleeve tightly and hermetically sleeved on the surface of the WC-Co hard alloy stud is used for preventing molten metal from directly contacting the surface of the WC-Co hard alloy stud, so that the surface of the WC-Co hard alloy stud is prevented from being melted by the molten metal, a transition region with a brittle phase is formed on an interface between WC-Co hard alloy and a substrate, solid diffusion welding is formed between the WC-Co hard alloy stud and the metal pipe sleeve under the heating of the cast-in molten metal, and the steel pipe sleeve is coated on a low-melting-point alloy coating on the surface of the steel pipe sleeve through the molten metal of the cast-in, so that metallurgical bonding is formed between the low-melting-point alloy coating and the substrate.
Disclosure of Invention
According to the sheath WC-Co hard alloy stud for insert casting, disclosed by the invention, the sheath is used for sealing the steel pipe sleeve on the surface of the WC-Co hard alloy stud to prevent molten metal from directly contacting the surface of the WC-Co hard alloy stud, so that a transition zone with a brittle phase can be prevented from being formed in the insert casting process;
the sheath WC-Co hard alloy stud for cast-in is pressed into a steel pipe sleeve in an interference fit manner, and two ends of the steel pipe sleeve are in tight contact with two ends of the WC-Co hard alloy stud through spinning plastic deformation and are spun to two ends of the sealed steel pipe sleeve;
according to the sheath WC-Co hard alloy stud for insert casting, a steel pipe sleeve tightly sheathed on the surface of the WC-Co hard alloy stud is used for preventing molten metal from directly contacting the surface of the WC-Co hard alloy stud, so that the surface of the WC-Co hard alloy stud is prevented from being fused by the molten metal, and a transition region with a brittle phase is formed on an interface between the WC-Co hard alloy stud and a substrate; the steel pipe sleeve tightly sheathed on the surface of the WC-Co hard alloy stud for the embedded casting prevents the WC-Co hard alloy stud part exposed out of the matrix from being oxidized in the embedded casting process and the subsequent heat treatment process of the wear-resistant piece;
according to the sheath WC-Co hard alloy stud for insert casting, the WC-Co hard alloy stud and the steel pipe sleeve are heated through the metal liquid for insert casting to form solid-state diffusion welding, and the steel pipe sleeve is melted through the metal liquid for insert casting and coated between the low-melting-point alloy coating on the surface of the steel pipe sleeve and the base body to form metallurgical bonding; the metal pipe sleeve is made of low-carbon steel or stainless steel or high-temperature alloy;
the WC-Co hard alloy stud is cylindrical, and one end of the WC-Co hard alloy stud, which is embedded in the matrix, is a spherical body or a cone with a spherical crown body at the top.
The invention relates to a sheath WC-Co hard alloy stud for insert casting and a manufacturing method thereof, wherein the specific implementation method comprises the following steps: 1) pressing the WC-Co hard alloy stud into a steel pipe sleeve with a certain length in an interference fit manner, wherein the WC-Co hard alloy stud is longer than the steel pipe sleeve for the sealing length of a spinning closing-up at two ends of the steel pipe sleeve, and two ends of the steel pipe sleeve are tightly contacted with two ends of the WC-Co hard alloy stud through spinning plastic deformation and are spun to two ends of the sealed steel pipe sleeve; 2) coating a low-melting-point alloy coating for connecting the steel pipe sleeve and a substrate in a metallurgical bonding manner on the surface of the steel pipe sleeve to obtain a sheath WC-Co hard alloy stud for insert casting;
the sheath WC-Co hard alloy stud for imbedding is fixed on the casting mould wall of the wear-resistant surface of a cast wear-resistant part, and the cast molten metal is solidified to obtain the wear-resistant part of the sheath WC-Co hard alloy stud for imbedding;
the sheath WC-Co hard alloy stud for insert casting is fixed on a wear-resistant surface of a wear-resistant part by a welding method according to a certain arrangement mode, and the wear-resistant layer is overlaid between the sheath WC-Co hard alloy studs to connect the WC-Co hard alloy stud and a matrix, so that the wear-resistant part can be manufactured and remanufactured.
Claims (8)
1. The invention relates to a sheath WC-Co hard alloy stud for insert casting and a manufacturing method thereof, which are remarkably characterized by comprising the following steps: the steel pipe sleeve tightly sealed and sleeved on the surface of the WC-Co hard alloy stud is used for preventing the molten metal from directly contacting the surface of the WC-Co hard alloy stud, so that the molten metal is prevented from fusing the surface of the WC-Co hard alloy stud and a transition region with a brittle phase is formed on an interface between the WC-Co hard alloy stud and a matrix;
the sheath WC-Co hard alloy stud for cast-in is pressed into a steel pipe sleeve in an interference fit manner, and two ends of the steel pipe sleeve are in tight contact with two ends of the WC-Co hard alloy stud through spinning plastic deformation and are spun to two ends of the sealed steel pipe sleeve;
the sheath WC-Co hard alloy stud for insert casting tightly seals the steel pipe sleeve sheathed on the surface of the WC-Co hard alloy stud to prevent the WC-Co hard alloy stud part exposed out of the matrix from being oxidized in the insert casting process and the subsequent heat treatment process of the wear-resistant piece;
according to the sheath WC-Co hard alloy stud for insert casting, the WC-Co hard alloy stud and the steel pipe sleeve are heated through metal liquid for insert casting to form solid diffusion welding, and the steel pipe sleeve is melted through the metal liquid for insert casting and coated between a low-melting-point alloy coating on the surface of the steel pipe sleeve and a substrate to form metallurgical bonding; the material of the steel pipe sleeve is low-carbon steel or stainless steel or high-temperature alloy;
the WC-Co hard alloy stud is cylindrical, and one end of the WC-Co hard alloy stud, which is embedded in the matrix, is a spherical body or a cone with a spherical crown body at the top;
the sheath WC-Co hard alloy stud for cast-in and the manufacturing method thereof have the following specific implementation method: 1) pressing the WC-Co hard alloy stud into a steel pipe with a certain length in an interference fit manner, wherein the WC-Co hard alloy stud is longer than the steel pipe with the length for spinning, closing and sealing at two ends of the steel pipe, and the two ends of the steel pipe are tightly contacted with the two ends of the WC-Co hard alloy stud through spinning plastic deformation and are spun to two ends of a pipe sleeve of the sealed steel pipe; 2) coating a low-melting-point alloy coating for connecting the steel pipe sleeve and the substrate in a metallurgical bonding manner on the surface of the steel pipe sleeve to obtain a sheath WC-Co hard alloy stud for cast-in;
the sheath WC-Co hard alloy stud for cast-in is fixed on the casting mould wall of the wear-resistant surface of the cast wear-resistant piece, and the cast molten metal is solidified to obtain the wear-resistant piece of the sheath WC-Co hard alloy stud for cast-in;
the sheath WC-Co hard alloy stud for insert casting is fixed on the wear-resistant surface of a wear-resistant part by a welding method according to a certain arrangement mode, and the WC-Co hard alloy stud and a matrix are connected by overlaying welding the wear-resistant layer between the sheath WC-Co hard alloy studs for manufacturing and remanufacturing the wear-resistant part.
2. According to claim 1, the sheath WC-Co cemented carbide stud for cast-in is a WC-Co cemented carbide stud with a steel pipe sheath tightly sealed sheath.
3. According to claim 1, the surface of the steel pipe sleeve of the sheath WC-Co cemented carbide stud for insert casting is coated with a low melting point alloy coating for metallurgically bonding the steel pipe sleeve and the substrate.
4. According to the claim 1, the steel pipe sleeve of the sheath WC-Co hard alloy stud for cast-in is made of low carbon steel.
5. According to the claim 1, the steel pipe sleeve of the sheath WC-Co hard alloy stud for cast-in is made of stainless steel.
6. According to the claim 1, the steel pipe sleeve of the sheath WC-Co hard alloy stud for cast-in is made of high temperature alloy.
7. The sheath WC-Co cemented carbide stud for insert casting according to claim 1 is suitable for insert casting for manufacturing wear resistant articles.
8. The jacketed WC-Co cemented carbide stud for insert casting according to claim 1 adapted for manufacturing and remanufacturing wear parts with a welding process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210439109.XA CN114776675A (en) | 2022-04-25 | 2022-04-25 | Sheath WC-Co hard alloy stud for cast-in and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210439109.XA CN114776675A (en) | 2022-04-25 | 2022-04-25 | Sheath WC-Co hard alloy stud for cast-in and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114776675A true CN114776675A (en) | 2022-07-22 |
Family
ID=82433674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210439109.XA Pending CN114776675A (en) | 2022-04-25 | 2022-04-25 | Sheath WC-Co hard alloy stud for cast-in and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114776675A (en) |
-
2022
- 2022-04-25 CN CN202210439109.XA patent/CN114776675A/en active Pending
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