CN113042983A - High-energy-beam cladding strengthening preparation process of aluminum piston ring groove - Google Patents

High-energy-beam cladding strengthening preparation process of aluminum piston ring groove Download PDF

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Publication number
CN113042983A
CN113042983A CN202110306657.0A CN202110306657A CN113042983A CN 113042983 A CN113042983 A CN 113042983A CN 202110306657 A CN202110306657 A CN 202110306657A CN 113042983 A CN113042983 A CN 113042983A
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cladding
ring groove
preparation process
welding wire
groove
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Inventor
彭银江
洪晓露
张将
朱鸿磊
徐英
刘永强
朱秀荣
陈大辉
侯林冲
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China Weapon Science Academy Ningbo Branch
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China Weapon Science Academy Ningbo Branch
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/06—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass piston rings from one piece
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23C—COATING 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
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
    • C23C24/106—Coating with metal alloys or metal elements only

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The invention relates to a high-energy beam cladding strengthening preparation process of an aluminum piston ring groove, which comprises the following steps: preparing a piston blank → processing a cladding groove of the first ring groove of the piston blank → cleaning → embedding a remelting welding wire → preheating → electron beam cladding → slow cooling → processing to obtain the first ring groove cladding reinforced piston. The process is simple and reasonable, the bonding strength between the prepared ring groove reinforcing part and the aluminum matrix is high, the bonding strength is up to more than 120MPa, the reliability of the piston in use is greatly improved, the microhardness is improved to 200HV, the wear resistance is superior to that of the traditional high-nickel cast iron insert ring, meanwhile, the process can approach the cooling oil cavity to the maximum extent, and the cooling effect and the wear resistance of the ring groove reinforcing part are obviously improved.

Description

High-energy-beam cladding strengthening preparation process of aluminum piston ring groove
Technical Field
The invention relates to a high-energy beam cladding strengthening preparation process, in particular to a high-energy beam cladding strengthening preparation process of an aluminum piston ring groove.
Background
The high-energy electron beam cladding strengthening is a technological method that a cladding material and a matrix alloy are heated by utilizing a high-energy electron beam to be rapidly melted, then the cladding material is solidified from a liquid phase at a very high cooling speed through self heat conduction of the matrix, and the cladding material is added to enhance the special performance of the part and improve the microstructure and the phase structure of the surface of the matrix alloy.
The invention relates to a device and a method for processing composite surface of laser-induced plasma impact cladding layer in Chinese patent with current patent number 201711101713.7 (publication number CN101709467B), which discloses a method for processing composite surface of laser-induced plasma impact cladding layer, the device comprises: the laser cladding device is used for carrying out laser cladding on the workpiece through the first mechanical arm; the laser shock peening device is connected with the laser cladding device and is used for carrying out laser shock peening on the workpiece through the second mechanical arm; and the three-axis motion machine tool is used for driving an operating platform for placing a workpiece, so that the workpiece is positioned in the operating range of the laser cladding device and the laser shock peening device, and the composite surface treatment of the workpiece is realized. However, the process can only improve the surface property structure of the base alloy material, the grains at the cladding part are refined, the surface hardness and the wear resistance are improved, and cladding modification and second material addition enhancement cannot be carried out in the deeper interior of the alloy.
The high-power density diesel engine piston works at high temperature and high pressure, and the highest temperature of the combustion chamber part at the top of the piston exceeds 420 ℃. The first ring groove part and the piston ring are assembled to form an airtight ring which plays a role in sealing gas, and the first ring groove part can bear high-temperature thermal load and mechanical load. In the aspects of piston ring groove material and manufacturing process, wear resistance is improved by inlaying wear-resistant cast iron at the first ring groove part domestically, but the reliability of the piston is influenced by thermal stress caused by the expansion coefficient difference between the cast iron and aluminum. Because the bonding strength of the high-nickel cast iron wear-resistant insert ring and the aluminum substrate is only 20-40 MPa, the wear-resistant insert ring and the aluminum substrate are easy to break away, break and the like under the action of high temperature. Therefore, a high-energy beam cladding strengthening preparation process for an aluminum piston ring groove needs to be developed, so that the working reliability of the piston at high temperature and high pressure is improved.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a high-energy beam cladding strengthening preparation process of the aluminum piston ring groove, which is simple and reasonable in process, the prepared ring groove strengthening part is firmly and stably combined with an aluminum substrate, and the cooling effect and the wear resistance of the ring groove strengthening part are improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: a high-energy beam cladding strengthening preparation process of an aluminum piston ring groove is characterized by comprising the following steps:
1) preparing a piston blank: the aluminum alloy piston blank is manufactured by adopting a metal mold casting process, and the aluminum alloy comprises the following components in percentage by mass: si: 11.0% -13.0%; mg: 0.8 to 1.2 percent; cu: 3.5% -5.0%; ni: 1.8% -3.0%; ti: 0.1 to 0.15 percent; fe: 0.1 to 0.3 percent; zr: 0.1 to 0.2 percent; v: 0.05 percent to 0.15 percent; the balance of Al;
2) cladding groove processing: processing a first ring groove part of the aluminum alloy piston blank into a cladding groove;
3) cleaning: cleaning the cladding groove, the reinforced welding wire and the pure copper welding wire by using a cleaning agent, and drying by using compressed air;
4) inlaying a welding wire: embedding and fixing the reinforced welding wires and the pure copper wires in the cladding groove;
5) preheating: preheating an aluminum alloy piston blank with a cladding groove embedded with a reinforced welding wire and a pure copper welding wire;
6) electron beam cladding: loading the preheated aluminum alloy piston blank into an electron beam welding vacuum furnace, vacuumizing to ensure that the vacuum degree is less than 0.1Pa, and adjusting a vacuum electron beam process: accelerating voltage is 59-61 KV, remelting current is 39-41 mA, remelting speed is 450-550 mm/s, surface focusing current is 3.08A-3.09A, and an annular groove reinforcing part is formed after cladding according to the process;
7) and (3) cooling: slowly cooling the clad aluminum alloy piston blank;
8) processing: and processing the cladding ring groove reinforcing part to form a first ring groove upper reinforcing layer and a first ring groove lower reinforcing layer of the piston.
Preferably, the reinforced welding wire in the step 2) is a Fe-Cr-Ni-Ti reinforced welding wire with the diameter of 1.0 +/-0.1 mm, and the chemical composition of the reinforced welding wire is Ni: 13.5% -17.5%; cr: 1.5% -2.5%, Ti: 6.5 to 8.0 percent of Fe and the balance of Fe; the diameter of the pure copper welding wire is phi 0.7-0.8 mm.
Preferably, the cleaning agent in the step 3) is absolute ethyl alcohol or trichloroethylene, and the cleaning time is 3-5 min.
Preferably, the preheating temperature in the step 5) is 100-110 ℃, and the preheating time is 30-50 min.
Preferably, the cooling temperature in the step 7) is initially 140-150 ℃, and the cooling time is 1-2 h.
And finally, the cladding depth of the ring groove reinforcing part in the step 8) is 7-8 mm, and the width is 2-3 mm.
Compared with the prior art, the invention has the advantages that: a cladding groove is formed in the first ring groove of the piston in a processing mode, a novel ring groove reinforcing material Fe-Cr-Ni-Ti welding wire and a pure copper welding wire are embedded into the cladding groove, electron beam cladding is carried out after preheating, a ring groove reinforcing part is formed, the bonding strength of the ring groove reinforcing part and an aluminum substrate is high, the bonding strength is up to more than 120MPa, and the insert ring can be effectively prevented from being disengaged; the microhardness is improved to more than 200HV, and the wear resistance is superior to that of the traditional high-nickel cast iron ring-inlaid piston. The process is simple and reasonable, the prepared ring groove reinforcing part has high bonding strength with an aluminum substrate, the use reliability of the piston is effectively improved, meanwhile, the process can be close to a cooling oil cavity to the maximum extent, the cooling effect of the ring groove reinforcing part is improved, and the formation of carbon deposition at the ring groove part is prevented.
Drawings
FIG. 1 is a flow diagram of a process for making an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a welding wire embedded in a first ring groove of an aluminum piston according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an aluminum piston after cladding of a first ring groove according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a finished product of cladding and reinforcing a first ring groove of an aluminum piston in the embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 to 4, the process flow of the following embodiment of the invention is as shown in fig. 1, the aluminum piston comprises a piston body 1, a first ring groove of the aluminum piston is processed into a cladding groove 2, a Fe-Cr-Ni-Ti enhanced welding wire 3 and a pure copper welding wire 4 are inlaid, electron beam cladding is performed after preheating, and a first ring groove cladding reinforced piston is formed after processing.
Example 1
The high-energy beam cladding strengthening preparation process for the aluminum piston ring groove of the embodiment of the invention sequentially comprises the following steps of:
1) preparing a piston blank: the aluminum alloy piston blank is manufactured by adopting a metal mold casting process, and the aluminum alloy comprises the following components in percentage by mass: si: 11.0 percent; mg: 0.8 percent; cu: 3.5 percent; ni: 1.8 percent; ti: 0.1 percent; fe: 0.1 percent; zr: 0.1 percent; v: 0.05 percent; the balance of Al;
2) cladding groove 2 processing: firstly, processing a first ring groove part of an aluminum alloy piston blank to form a cladding groove 2;
3) cleaning: cleaning a cladding groove 2, a Fe-Cr-Ni-Ti reinforced welding wire 3 (the chemical components of Ni: 13.5%; Cr: 1.5%; Ti: 6.5%; the rest is Fe) with a diameter of 1.0mm and a pure copper welding wire 4 with a diameter of 0.7-0.8 mm by using a cleaning agent absolute ethyl alcohol or trichloroethylene for 3-5 min; and drying by adopting compressed air after cleaning.
4) Embedding a remelting welding wire: embedding the cleaned Fe-Cr-Ni-Ti reinforced welding wire 3 and the cleaned pure copper welding wire 4 into the cladding groove 2 and fixing;
5) preheating: preheating the piston blank with the cladding groove 2 embedded with the Fe-Cr-Ni-Ti reinforced welding wire 3 and the pure copper welding wire 4; preheating at 100 deg.C for 50 min;
6) electron beam cladding: the preheated piston is arranged in an electron beam welding vacuum furnace, the vacuum degree is vacuumized to be less than 0.1Pa, and the vacuum electron beam process is adjusted: accelerating voltage of 60KV, remelting current of 40mA, remelting speed of 500mm/s and surface focusing current of 3.08A, and forming a ring groove reinforcing part 5 after cladding according to the process;
7) and (3) cooling: and slowly cooling the clad aluminum piston blank to prevent the first ring groove cladding part from cracking, wherein the cooling temperature is initially 140 ℃, and the cooling time is 1 h.
8) Processing: and processing the reinforced part after cladding to form a first ring groove upper reinforcing layer 51 and a first ring groove lower reinforcing layer 52 of the piston, so as to play roles in strengthening and resisting wear.
The ring groove reinforcing part formed by cladding by the method has high bonding strength with an aluminum substrate, the bonding strength is up to more than 120MPa, and the ring embedding can be effectively prevented from being disengaged; the microhardness is improved to more than 200HV, and the wear resistance is superior to that of the traditional high-nickel cast iron ring-inlaid piston; the process can approach the cooling oil cavity to the maximum extent, improves the cooling effect of the enhanced part of the ring groove, and prevents the formation of carbon deposition at the ring groove part, thereby greatly improving the use reliability of the piston.
Example 2
The high-energy beam cladding strengthening preparation process for the aluminum piston ring groove of the embodiment of the invention sequentially comprises the following steps of:
1) preparing a piston blank: the aluminum alloy piston blank is manufactured by adopting a metal mold casting process, and the aluminum alloy comprises the following components in percentage by mass: si: 12.0 percent; mg: 1.0 percent; cu: 4.0 percent; ni: 2.4 percent; ti: 0.12 percent; fe: 0.2 percent; zr: 0.15 percent; v: 0.10 percent; the balance of Al;
2) cladding groove 2 processing: firstly, processing a first ring groove part of an aluminum alloy piston blank to form a cladding groove 2;
3) cleaning: cleaning a cladding groove 2, a Fe-Cr-Ni-Ti reinforced welding wire 3 (the chemical components are 15.5% of Ni, 2.0% of Cr, 7% of Ti and the balance of Fe) with the diameter of 1.0mm and a pure copper welding wire 4 with the diameter of 0.7-0.8 mm by adopting a cleaning agent absolute ethyl alcohol or trichloroethylene for 3-5 min; drying by compressed air after cleaning;
4) embedding a remelting welding wire: embedding the cleaned Fe-Cr-Ni-Ti reinforced welding wires 3 and 3 pure copper welding wires 4 into the cladding groove 2 and fixing;
5) preheating: preheating the piston with the cladding groove 2 embedded with the Fe-Cr-Ni-Ti reinforced welding wire 3 and the pure copper welding wire 4; the preheating temperature is 105 ℃, and the preheating time is 40 min.
6) Electron beam cladding: the preheated piston is arranged in an electron beam welding vacuum furnace, the vacuum degree is vacuumized to be less than 0.1Pa, and the vacuum electron beam process is adjusted: accelerating voltage of 60KV, remelting current of 40mA, remelting speed of 500mm/s and surface focusing current of 3.08A, and forming a ring groove reinforcing part 5 after cladding according to the process;
7) and (3) cooling: slowly cooling the cladded aluminum piston blank at the initial cooling temperature of 145 ℃ for 1.5h in order to prevent the cladding part of the first ring groove from cracking;
8) processing: and processing the reinforced part after cladding to form a first ring groove upper reinforcing layer 51 and a first ring groove lower reinforcing layer 52 of the piston, so as to play roles in strengthening and resisting wear.
The ring groove reinforcing part formed by cladding by the method has high bonding strength with an aluminum substrate, the bonding strength is up to more than 120MPa, and the ring embedding can be effectively prevented from being disengaged; the microhardness is improved to more than 200HV, and the wear resistance is superior to that of the traditional high-nickel cast iron ring-inlaid piston; the process can approach the cooling oil cavity to the maximum extent, improves the cooling effect of the enhanced part of the ring groove, and prevents the formation of carbon deposition at the ring groove part, thereby greatly improving the use reliability of the piston.
Example 3
The high-energy beam cladding strengthening preparation process for the aluminum piston ring groove of the embodiment of the invention sequentially comprises the following steps of:
1) preparing a piston blank body: the aluminum alloy piston blank body 1 is manufactured by adopting a metal mold casting process, and the aluminum alloy comprises the following components in percentage by mass: si: 13.0 percent; mg: 1.2 percent; cu: 5.0 percent; ni: 3.0 percent; ti: 0.15 percent; fe: 0.3 percent; zr: 0.2 percent; v: 0.15 percent; the balance of Al;
2) cladding groove 2 processing: firstly, processing a first ring groove part of an aluminum alloy piston blank to form a cladding groove 2;
3) cleaning: cleaning a cladding groove 2, a Fe-Cr-Ni-Ti reinforced welding wire 3 (the chemical components of Ni: 17.5%; Cr: 2.5%; Ti: 8.0% and the balance Fe) with a diameter of 1.0mm and a pure copper welding wire 4 with a diameter of 0.7-0.8 mm by using a cleaning agent absolute ethyl alcohol or trichloroethylene for 3-5 min; drying by compressed air after cleaning;
4) embedding a remelting welding wire: embedding the cleaned Fe-Cr-Ni-Ti reinforced welding wire with the diameter of 1.0mm and the cleaned pure copper wire with the diameter of 0.7-0.8 mm into the cladding groove 2 and fixing;
5) preheating: preheating the piston with the cladding groove 2 embedded with the Fe-Cr-Ni-Ti reinforced welding wire 3 and the pure copper welding wire 4; preheating at 110 deg.C for 30 min;
6) electron beam cladding: the preheated piston is arranged in an electron beam welding vacuum furnace, the vacuum degree is vacuumized to be less than 0.1Pa, and the vacuum electron beam process is adjusted: accelerating voltage of 60KV, remelting current of 40mA, remelting speed of 500mm/s and surface focusing current of 3.08A, and forming a ring groove reinforcing part 5 after cladding according to the process;
7) and (3) cooling: slowly cooling the cladded aluminum piston blank at the initial cooling temperature of 150 ℃ for 2h in order to prevent the cladding part of the first ring groove from cracking;
8) processing: and processing the reinforced part after cladding to form a first ring groove upper reinforcing layer 51 and a first ring groove lower reinforcing layer 52 of the piston, so as to play roles in strengthening and resisting wear.
The ring groove reinforcing part formed by cladding by the method has high bonding strength with an aluminum substrate, the bonding strength is up to more than 120MPa, and the ring embedding can be effectively prevented from being disengaged; the microhardness is improved to more than 200HV, and the wear resistance is superior to that of the traditional high-nickel cast iron ring-inlaid piston; the process can approach the cooling oil cavity to the maximum extent, improves the cooling effect of the enhanced part of the ring groove, and prevents the formation of carbon deposition at the ring groove part, thereby greatly improving the use reliability of the piston.
The technical means disclosed in the scheme of the invention are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications are also considered to be within the scope of the present invention.

Claims (6)

1. A high-energy beam cladding strengthening preparation process of an aluminum piston ring groove is characterized by comprising the following steps:
1) preparing a piston blank: the aluminum alloy piston blank is manufactured by adopting a metal mold casting process, and the aluminum alloy comprises the following components in percentage by mass: si: 11.0% -13.0%; mg: 0.8 to 1.2 percent; cu: 3.5% -5.0%; ni: 1.8% -3.0%; ti: 0.1 to 0.15 percent; fe: 0.1 to 0.3 percent; zr: 0.1 to 0.2 percent; v: 0.05 percent to 0.15 percent; the balance of Al;
2) cladding groove processing: processing a first ring groove part of the aluminum alloy piston blank into a cladding groove;
3) cleaning: cleaning the cladding groove, the reinforced welding wire and the pure copper welding wire by using a cleaning agent, and drying by using compressed air;
4) inlaying a welding wire: embedding and fixing the reinforced welding wires and the pure copper wires in the cladding groove;
5) preheating: preheating an aluminum alloy piston blank with a cladding groove embedded with a reinforced welding wire and a pure copper welding wire;
6) electron beam cladding: loading the preheated aluminum alloy piston blank into an electron beam welding vacuum furnace, vacuumizing to ensure that the vacuum degree is less than 0.1Pa, and adjusting a vacuum electron beam process: accelerating voltage is 59-61 KV, remelting current is 39-41 mA, remelting speed is 450-550 mm/s, surface focusing current is 3.08A-3.09A, and an annular groove reinforcing part is formed after cladding according to the process;
7) and (3) cooling: slowly cooling the clad aluminum alloy piston blank;
8) processing: and processing the cladding ring groove reinforcing part to form a first ring groove upper reinforcing layer and a first ring groove lower reinforcing layer of the piston.
2. The high-energy beam cladding strengthening preparation process of claim 1, wherein the high-energy beam cladding strengthening preparation process comprises the following steps: the reinforced welding wire in the step 2) is a Fe-Cr-Ni-Ti reinforced welding wire with phi of 1.0 +/-0.1 mm, and the chemical components of the reinforced welding wire are Ni: 13.5% -17.5%; cr: 1.5% -2.5%, Ti: 6.5 to 8.0 percent of Fe and the balance of Fe; the diameter of the pure copper welding wire is phi 0.7-0.8 mm.
3. The high-energy beam cladding strengthening preparation process of claim 1, wherein the high-energy beam cladding strengthening preparation process comprises the following steps: the cleaning agent in the step 3) is absolute ethyl alcohol or trichloroethylene, and the cleaning time is 3-5 min.
4. The high-energy beam cladding strengthening preparation process of claim 1, wherein the high-energy beam cladding strengthening preparation process comprises the following steps: the preheating temperature in the step 5) is 100-110 ℃, and the preheating time is 30-50 min.
5. The high-energy beam cladding strengthening preparation process of claim 1, wherein the high-energy beam cladding strengthening preparation process comprises the following steps: the cooling temperature in the step 7) is initially 140-150 ℃, and the cooling time is 1-2 h.
6. The high-energy beam cladding strengthening preparation process of claim 1, wherein the high-energy beam cladding strengthening preparation process comprises the following steps: the cladding depth of the annular groove reinforcing part in the step 8) is 7-8 mm, and the width of the annular groove reinforcing part is 2-3 mm.
CN202110306657.0A 2021-03-23 2021-03-23 High-energy-beam cladding strengthening preparation process of aluminum piston ring groove Pending CN113042983A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0972243A (en) * 1995-09-04 1997-03-18 Unisia Jecs Corp Piston for internal combustion engine
JPH1193768A (en) * 1997-09-24 1999-04-06 Unisia Jecs Corp Piston for internal combustion engine and its manufacture
CN104439674A (en) * 2014-11-11 2015-03-25 中国兵器工业第五二研究所 Electron beam alloying strengthening method for aluminum-silicon alloy piston ring groove
CN111408913A (en) * 2020-03-12 2020-07-14 中国兵器科学研究院宁波分院 Remelting strengthening preparation method for throat part of aluminum piston

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0972243A (en) * 1995-09-04 1997-03-18 Unisia Jecs Corp Piston for internal combustion engine
JPH1193768A (en) * 1997-09-24 1999-04-06 Unisia Jecs Corp Piston for internal combustion engine and its manufacture
CN104439674A (en) * 2014-11-11 2015-03-25 中国兵器工业第五二研究所 Electron beam alloying strengthening method for aluminum-silicon alloy piston ring groove
CN111408913A (en) * 2020-03-12 2020-07-14 中国兵器科学研究院宁波分院 Remelting strengthening preparation method for throat part of aluminum piston

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张安峰: "《绿色再制造工程基础及其应用》", 31 May 2005 *

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