CN105803302A - Carbon scraping ring and preparation method thereof - Google Patents

Carbon scraping ring and preparation method thereof Download PDF

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Publication number
CN105803302A
CN105803302A CN201610185161.1A CN201610185161A CN105803302A CN 105803302 A CN105803302 A CN 105803302A CN 201610185161 A CN201610185161 A CN 201610185161A CN 105803302 A CN105803302 A CN 105803302A
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Prior art keywords
carbocyclic ring
percent
follows
scrape
carbon
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CN201610185161.1A
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CN105803302B (en
Inventor
周广辉
姚涛
卢琼
张志武
乔亚辉
李志有
朱强
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Central Plains Nei Pei Group PLC
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Central Plains Nei Pei Group PLC
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/10—Cast-iron alloys containing aluminium or silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • B22D13/04—Centrifugal casting; Casting by using centrifugal force of shallow solid or hollow bodies, e.g. wheels or rings, in moulds rotating around their axis of symmetry
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/08—Making cast-iron alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/06—Cast-iron alloys containing chromium
    • C22C37/08—Cast-iron alloys containing chromium with nickel

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

The invention belongs to the technical field of engine cylinder liners, and particularly provides a carbon scraping ring and a preparation method thereof. The carbon scraping ring is prepared according to a centrifugal casting technology, and comprises the following chemical ingredients by weight: 2.6 to 3.0 percent of C, 1.7 to 2.2 percent of Si, 0.25 to 0.5 percent of P, less than 0.1 percent of S, 0.5 to 1.0 percent of Mn, 0.25 to 0.5 percent of B, 0.3 to 0.6 percent of Cu, less than 0.2 percent of Cr, 0.3 to 0.7 percent of Mo, 0.3 to 0.6 percent of Ni, and the balance of Fe. The carbon scraping ring provided by the invention is short in production cycle, low in cost, high in tensile strength and the like; and primary application experiments show that the carbon scraping ring can remove carbon deposit on the surface of a piston relatively well, the consumption of lubricating oil can be reduced, the service life is relatively long, and the practical value and the popularization and application significance is relatively good.

Description

One scrapes carbocyclic ring and preparation method thereof
Technical field
The invention belongs to air cylinder sleeve of engine technical field, be specifically related to one and scrape carbocyclic ring and preparation method thereof.
Background technology
Promote along with engine power and run time lengthening, Diesel engine especially with heavy oil, the piston face coordinated with cylinder jacket very easily accumulates a large amount of carbon deposit, the carbon deposit of these accumulation have impact on the stable operation of electromotor on the one hand, cause the rapid rising of lubrication oil consumption on the other hand, and then lifting operating cost, scrape carbocyclic ring technology in this context and arise at the historic moment.
In prior art, arranging and scrape carbocyclic ring and mainly have two class formation forms in cylinder jacket, one is to be formed by correct position spraying composite material in cylinder jacket to scrape carbocyclic ring, and another is that independent supporting with cylinder jacket of design scrapes carbocyclic ring accessory.It is higher owing to requiring for composite that prepared by spraying coating process scrapes carbocyclic ring, adds the defect of structure itself, and application is relatively limited at present.And individually designed scrape carbocyclic ring accessory, comparatively tight owing to coordinating with cylinder jacket, and be easily changed and keep in repair, thus be the major way of current piston face de-carbon.But there is the hardness of structure defect low, flimsy own in carbocyclic ring accessory of scraping of the prior art, thus is extremely necessary the formula and preparation technology of scraping carbocyclic ring carry out suitably research and improves.
Summary of the invention
It is an object of the present invention to provide and a kind of adopt prepared by centrifugal casting technique to scrape carbocyclic ring, prepared carbocyclic ring of scraping has tensile strength advantage high, non-damageable.
Details are as follows for technical scheme.
One scrapes carbocyclic ring, adopts centrifugal casting technique to be prepared from, and its structure is more than+95% pearlite of A type graphite+a small amount of ferrite, by weight percentage, this scrape carbocyclic ring chemical composition particularly as follows:
Carbon 2.6～3.0%, silicon 1.7～2.2%；
Phosphorus 0.25～0.5%, sulfur < 0.1%, manganese 0.5～1.0%, boron 0.25～0.5%, copper 0.3～0.6%, chromium < 0.2%, molybdenum 0.3～0.7%, nickel 0.3～0.6%；
Surplus is Fe.
Described scraping carbocyclic ring, by weight percentage, this chemical composition scraping carbocyclic ring is specifically as follows:
Carbon 2.75%, silicon 1.8%；
Phosphorus 0.3%, sulfur 0.05%, manganese 0.7%, boron 0.38%, copper 0.4%, chromium 0.1%, molybdenum 0.4%, nickel 0.35%；
Surplus is Fe.
Described scraping carbocyclic ring, by weight percentage, this chemical composition scraping carbocyclic ring can also be specifically:
Carbon 2.9%, silicon 2.1%；
Phosphorus 0.3%, sulfur 0.05%, manganese 0.7%, boron 0.3%, copper 0.5%, chromium 0.1%, molybdenum 0.47%, nickel 0.5%；
Surplus is Fe.
The described preparation method scraping carbocyclic ring, adopts centrifugal casting technique, specifically includes following steps:
(1) melting raw material, particularly as follows:
Weigh the raw material of regulation in proportion, adopt 1450 DEG C～1500 DEG C meltings of medium-frequency induction furnace, tap a blast furnace liquid time adopt following current to breed mode to add the silicon titanate innoculant that granularity is 0.8～1.8mm accounting for ferrum liquid weight 0.3～0.5% of coming out of the stove；
(2) casting mold, it is thus achieved that scrape carbocyclic ring spray, particularly as follows:
Adopt water-cooled metal mould wet coating material centrifugal casting technique to produce and scrape carbocyclic ring foundry goods, adopt following current to breed mode when ferrum liquid injects casting machine and add the silicon titanate innoculant that granularity is 0.5～0.8mm accounting for injection casting machine ferrum liquid weight 0.05～0.12%, design parameter is, cast temperature 1410 DEG C～1430 DEG C, casting machine rotating speed 1200～1500r/min, mold preheating temperature 350 DEG C～400 DEG C, paint thickness 0.5～0.8mm, mold clearing temperature 800 DEG C～850 DEG C；Single scrape carbocyclic ring spray wall thickness 6～9mm；
During casting, foundry goods can be all many blanks, i.e. can produce on a blank and multiple scrape carbocyclic ring；
(3) polish, it is thus achieved that scrape carbocyclic ring foundry goods, particularly as follows:
Gained in step (2) being scraped carbocyclic ring spray and carries out the machining of endoporus, cylindrical, technological process is as follows:
Endoporus → stress relief annealing → repair → finish ream endoporus → finish turning → chamfering for rough turn cylindrical → slightly cut with scissors；
Finish turning operation therein preferably employs global function Digit Control Machine Tool, it may be achieved clamped one time, simultaneously completes the processing of endoporus, cylindrical and end face, and there is machining accuracy height, crudy is good, production efficiency is high advantage.
Carbocyclic ring of scraping provided by the present invention is carried out detection and shown, its structure is more than+95% pearlite of A type graphite+a small amount of ferrite, and wherein graphite size 4～7 grades, iron phosphide eutectic is bright, medium uniform net distribution；Further test experience shows, this scrapes carbocyclic ring tensile strength can reach more than 350MPa, and hardness is more than 240HB, and elastic modelling quantity is more than 140GPa, it is possible to better meet actually used demand.
In general, provided by the present invention scrape carbocyclic ring have with short production cycle, cost is low, tensile strength advantages of higher, Preliminary Applications experiments show that, can better remove piston face carbon deposit, reduce lubrication oil consumption, and service life is longer, has good practical value and popularization and application meaning.
Accompanying drawing explanation
Fig. 1 is the structure figure scraping carbocyclic ring prepared by embodiment 1；
Fig. 2 is 100 × enlarged drawing of structure in Fig. 1；
Fig. 3 is 500 × enlarged drawing of structure in Fig. 1.
Detailed description of the invention
Explanation that the present invention will be further explained by the examples below.
Embodiment 1
By weight percentage, the present embodiment provides the chemical composition scraping carbocyclic ring particularly as follows:
Element C Si P S Mn B Cu Cr Mo Ni Ferrum
Percentage by weight (%) 2.75 1.8 0.3 0.05 0.7 0.38 0.4 0.1 0.4 0.35 Surplus
Scraping carbocyclic ring described in the present embodiment adopts centrifugal casting technique to be prepared from, and concrete preparation process is summarized as follows.
(1) melting raw material, particularly as follows:
Weigh the raw material of regulation in proportion, adopt 1460 DEG C of meltings of medium-frequency induction furnace, tap a blast furnace liquid time adopt following current to breed mode to add the silicon titanate innoculant that granularity is 1.0mm accounting for ferrum liquid weight 0.35% of coming out of the stove；
(2) casting mold, it is thus achieved that scrape carbocyclic ring spray, particularly as follows:
Adopt water-cooled metal mould wet coating material centrifugal casting technique to produce and scrape carbocyclic ring foundry goods, adopt following current to breed mode when ferrum liquid injects casting machine and add the silicon titanate innoculant that granularity is 0.6mm accounting for injection casting machine ferrum liquid weight 0.08%, design parameter is, cast temperature 1420 DEG C, casting machine rotating speed 1300r/min, mold preheating temperature 365 DEG C, paint thickness 0.6mm, mold clearing temperature 820 DEG C；Single scrape carbocyclic ring spray wall thickness 6～9mm；
During casting, foundry goods is all many blanks, i.e. can produce on a blank and multiple scrape carbocyclic ring；
(3) polish, it is thus achieved that scrape carbocyclic ring foundry goods, particularly as follows:
Gained in step (2) being scraped carbocyclic ring spray and carries out the machining of endoporus, cylindrical, technological process is as follows:
Endoporus → stress relief annealing → repair → finish ream endoporus → finish turning → chamfering for rough turn cylindrical → slightly cut with scissors；
Finish turning operation therein adopts global function Digit Control Machine Tool, it may be achieved clamped one time, simultaneously completes the processing of endoporus, cylindrical and end face.
Prepared is scraped carbocyclic ring blank sample preparation detection, uses BX51RF metallurgical microscope detection metallographic, use HB-3000B electronics Brinell hardness tester detection hardness, use WDW300KN universal test machine testing tensile strength, elastic modelling quantity.
Metallographic testing result is such as shown in Fig. 1 ~ 3, it can be seen that this metallographic scraping carbocyclic ring is more than+95% pearlite of A type graphite+a small amount of ferrite, graphite size 4～7 grades, iron phosphide eutectic is bright, medium uniform net distribution.Hardness results shows, this scrapes the hardness of carbocyclic ring more than 255HB.Tensile strength and elastic modelling quantity detection show, its tensile strength reaches more than 370MPa, and elastic modelling quantity is more than 158GPa.
Embodiment 2
By weight percentage, the present embodiment provides the chemical composition scraping carbocyclic ring particularly as follows:
Element C Si P S Mn B Cu Cr Mo Ni Ferrum
Percentage by weight (%) 2.9 2.1 0.3 0.05 0.7 0.3 0.5 0.1 0.47 0.5 Surplus
Scraping carbocyclic ring described in the present embodiment adopts centrifugal casting technique to be prepared from, and concrete preparation process is summarized as follows.
(1) melting raw material, particularly as follows:
Weigh the raw material of regulation in proportion, adopt 1480 DEG C of meltings of medium-frequency induction furnace, tap a blast furnace liquid time adopt following current to breed mode to add that to account for ferrum liquid weight 0.4% granularity of coming out of the stove be the silicon titanate innoculant of 1.5mm
(2) casting mold, it is thus achieved that scrape carbocyclic ring spray, particularly as follows:
Adopt water-cooled metal mould wet coating material centrifugal casting technique to produce and scrape carbocyclic ring foundry goods, ferrum liquid inject casting machine time adopt following current breed mode add account for injection casting machine ferrum liquid weight 0.11% granularity be the silicon titanate innoculant of 0.7mm, design parameter is, cast temperature 1425 DEG C, casting machine rotating speed 1400r/min, mold preheating temperature 390 DEG C, paint thickness 0.7mm, mold clearing temperature 845 DEG C；Single scrape carbocyclic ring spray wall thickness 6～9mm；
During casting, foundry goods is all many blanks, i.e. can produce on a blank and multiple scrape carbocyclic ring；
(3) polish, it is thus achieved that scrape carbocyclic ring foundry goods, particularly as follows:
Gained in step (2) being scraped carbocyclic ring spray and carries out the machining of endoporus, cylindrical, technological process is as follows:
Endoporus → stress relief annealing → repair → finish ream endoporus → finish turning → chamfering for rough turn cylindrical → slightly cut with scissors；
Finish turning operation therein adopts global function Digit Control Machine Tool, it may be achieved clamped one time, simultaneously completes the processing of endoporus, cylindrical and end face.
Prepared is scraped carbocyclic ring blank sample preparation detection, uses BX51RF metallurgical microscope detection metallographic, use HB-3000B electronics Brinell hardness tester detection hardness, use WDW300KN universal test machine testing tensile strength, elastic modelling quantity.
Testing result shows, this metallographic scraping carbocyclic ring is similarly more than+95% pearlite of A type graphite+a small amount of ferrite, graphite size 4～7 grades, and iron phosphide eutectic is bright, medium uniform net distribution；Its hardness is more than 250HB；Its tensile strength reaches more than 375MPa, and elastic modelling quantity is more than 160GPa.

Claims (4)

1. scraping carbocyclic ring for one kind, it is characterised in that adopt centrifugal casting technique to be prepared from, by weight percentage, this scrapes the chemical composition of carbocyclic ring particularly as follows: carbon 2.6～3.0%, silicon 1.7～2.2%；
Phosphorus 0.25～0.5%, sulfur < 0.1%, manganese 0.5～1.0%, boron 0.25～0.5%, copper 0.3～0.6%, chromium < 0.2%, molybdenum 0.3～0.7%, nickel 0.3～0.6%；
Surplus is Fe.
2. scrape carbocyclic ring as claimed in claim 1, it is characterised in that this scrapes the chemical composition of carbocyclic ring particularly as follows: carbon 2.75%, silicon 1.8%；Phosphorus 0.3%, sulfur 0.05%, manganese 0.7%, boron 0.38%, copper 0.4%, chromium 0.1%, molybdenum 0.4%, nickel 0.35%；Surplus is Fe.
3. scrape carbocyclic ring as claimed in claim 1, it is characterised in that this scrapes the chemical composition of carbocyclic ring particularly as follows: carbon 2.9%, silicon 2.1%；Phosphorus 0.3%, sulfur 0.05%, manganese 0.7%, boron 0.3%, copper 0.5%, chromium 0.1%, molybdenum 0.47%, nickel 0.5%；Surplus is Fe.
4. the preparation method scraping carbocyclic ring described in claim 1, it is characterised in that specifically include following steps:
(1) melting raw material, particularly as follows:
Weigh the raw material of regulation in proportion, 1450 DEG C～1500 DEG C meltings, tap a blast furnace liquid time adopt following current to breed mode to add that to account for ferrum liquid weight 0.3～0.5% granularity of coming out of the stove be the silicon titanate innoculant of 0.8～1.8mm；
(2) casting mold, it is thus achieved that scrape carbocyclic ring spray, particularly as follows:
Adopt water-cooled metal mould wet coating material centrifugal casting technique to produce and scrape carbocyclic ring foundry goods, ferrum liquid inject casting machine time adopt following current breed mode add account for injection casting machine ferrum liquid weight 0.05～0.12% granularity be the silicon titanate innoculant of 0.5～0.8mm, design parameter is, cast temperature 1410 DEG C～1430 DEG C, casting machine rotating speed 1200～1500r/min, mold preheating temperature 350 DEG C～400 DEG C, paint thickness 0.5～0.8mm, mold clearing temperature 800 DEG C～850 DEG C；Single scrape carbocyclic ring spray wall thickness 6～9mm；
(3) gained in step (2) is scraped carbocyclic ring spray and carry out the cutting polish of endoporus, cylindrical, it is thus achieved that scrape carbocyclic ring foundry goods.
CN201610185161.1A 2016-03-29 2016-03-29 One kind scrapes carbocyclic ring and preparation method thereof Active CN105803302B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107387252A (en) * 2017-09-13 2017-11-24 中原内配集团股份有限公司 A kind of dry liner and preparation method thereof
CN107829022A (en) * 2017-10-24 2018-03-23 中原内配集团股份有限公司 A kind of super composite of centrifugal casting scrapes carbocyclic ring and its production technology

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Publication number Priority date Publication date Assignee Title
JPS6126754A (en) * 1984-07-13 1986-02-06 Kubota Ltd Double-layered cylinder liner having superior wear resistance
CN101778959A (en) * 2007-06-26 2010-07-14 国立大学法人岩手大学 Flake graphite cast iron and manufacture method thereof
CN103131945A (en) * 2013-03-26 2013-06-05 河南中原吉凯恩气缸套有限公司 Boron-containing low-carbon bainite cylinder jacket and preparation method thereof
CN104164608A (en) * 2013-05-19 2014-11-26 滨州亚泰雅德动力配件有限公司 Cast iron material for aluminum piston wear resistant insert ring
CN104911467A (en) * 2015-07-07 2015-09-16 中原内配集团股份有限公司 Subcritical quenching cylinder sleeve and preparation method thereof

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
JPS6126754A (en) * 1984-07-13 1986-02-06 Kubota Ltd Double-layered cylinder liner having superior wear resistance
CN101778959A (en) * 2007-06-26 2010-07-14 国立大学法人岩手大学 Flake graphite cast iron and manufacture method thereof
CN103131945A (en) * 2013-03-26 2013-06-05 河南中原吉凯恩气缸套有限公司 Boron-containing low-carbon bainite cylinder jacket and preparation method thereof
CN104164608A (en) * 2013-05-19 2014-11-26 滨州亚泰雅德动力配件有限公司 Cast iron material for aluminum piston wear resistant insert ring
CN104911467A (en) * 2015-07-07 2015-09-16 中原内配集团股份有限公司 Subcritical quenching cylinder sleeve and preparation method thereof

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107387252A (en) * 2017-09-13 2017-11-24 中原内配集团股份有限公司 A kind of dry liner and preparation method thereof
CN107829022A (en) * 2017-10-24 2018-03-23 中原内配集团股份有限公司 A kind of super composite of centrifugal casting scrapes carbocyclic ring and its production technology

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