CN113755743B - Sharp edge grinding disc - Google Patents

Sharp edge grinding disc Download PDF

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Publication number
CN113755743B
CN113755743B CN202010499863.3A CN202010499863A CN113755743B CN 113755743 B CN113755743 B CN 113755743B CN 202010499863 A CN202010499863 A CN 202010499863A CN 113755743 B CN113755743 B CN 113755743B
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grinding
rack
hardness
percent
edge
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CN113755743A (en
Inventor
蒋思蒙
赵杨
孙靖菲
蒋小军
严震
宋萍
秦琦
李刚
李慧帆
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Nantong Huayan Grinding Film Co ltd
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Nantong Huayan Grinding Film Co ltd
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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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D5/00—Heat treatments of cast-iron
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/004—Methods of beating or refining including disperging or deflaking
    • D21D1/006—Disc mills
    • D21D1/008—Discs
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills
    • D21D1/306—Discs
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

The invention discloses a sharp-edge grinding plate, which comprises a grinding plate material and is characterized in that trace semimetals of tellurium, antimony and boron and trace rare metals of niobium and titanium are added into the grinding plate material for promoting the development of grain refinement, hardenability, hardness and toughness of high-chromium cast iron, and the method mainly comprises four steps of 1) casting the grinding plate; 2) heat treatment of the grinding sheet; 3) cooling the grinding plate; 4) and (5) performing subsequent treatment on the grinding sheet. The hardness of the grinding sheet matrix is 60-64HRC, the surface hardness of the grinding sheet rack is 61-66HRC, the edge hardness of the grinding sheet rack is 62-68HRC, and the impact work of the edge of the rack reaches 8.5-12J/cm through the chilling of the superposed combined spray2Its hardness, impact toughness and wearability all obtain promoting, and the abrasive disc has realized the good cooperation of intensity with toughness, has the abrasive disc of high toughness, high wearability and high blade sharpness retentivity at work, adapts to the abominable operating mode condition of mill, improves abrasive disc life and cellulose fiber preparation quality.

Description

Sharp edge grinding disc
Technical Field
The invention belongs to the technical field of artificial boards and pulping and papermaking, and particularly relates to a sharp-edge grinding disc.
Background
The grinding sheet of the grinding machine in the industries of artificial board and pulping and papermaking is a component for directly separating cellulose fiber. When the fibers are separated, the grinding machine is also worn, and whether the grinding machine can fully exert the technical performance and the economic index depends on the wearing state of the grinding sheet to a great extent. In the process of separating cellulose fibers, the abrasive disc can generate friction abrasion, fatigue abrasion, abrasive particle abrasion, corrosion abrasion and the like, and after the abrasive disc is abraded, the cutting edge is passivated, the gap is enlarged, and the abrasive disc is made to be out of operation. The hardness of the stainless steel abrasive material in the prior art is usually 25-45HRC, the toughness is good, but the wear resistance is poor; the hardness of the high-chromium cast iron abrasive disc material is usually 50-60HRC, and the abrasive disc in the prior art has high hardness and good wear resistance but poor toughness.
The wear of the grinding plate in a service cycle is divided into 3 different stages, wherein the 1 st stage is an early grinding-in stage, the 2 nd stage is a normal working stage, and the 3 rd stage is a later passivation stage. The macroscopic phenomenon of abnormal abrasion of the abrasive disc with poor toughness is large-area tooth breakage, and the damage form directly influences production, so that the consequence is serious; and the grinding disc with low hardness and poor wear resistance is subjected to grinding in a short time, the front edge of the rack of the grinding disc is passivated, the cutting edge is rounded, the grinding disc enters a passivation stage in advance, the shearing capacity of the grinding disc is reduced sharply, the quality of separated fibers is unqualified, the grinding disc is taken off in advance, and the service life of the grinding disc is shortened seriously.
Therefore, the grinding plate with high toughness, high wear resistance and high cutting edge sharpness retention needs to be designed and developed to adapt to the severe working conditions of the grinding machine.
Disclosure of Invention
The invention aims to provide a sharp-edge grinding plate to solve the problem that the grinding plate with poor toughness, poor wear resistance and low hardness, which is proposed in the background art, is easy to cause serious shortening of the service life.
In order to achieve the purpose, the invention provides the following technical scheme: a sharp edge grinding plate comprising a grinding plate material, wherein the grinding plate material comprises the following components in percentage by weight: 2.8 to 3.8 percent of carbon, 0.6 to 1.2 percent of silicon, 0.5 to 1.1 percent of manganese, 26 to 35 percent of chromium, 1.15 to 2.55 percent of molybdenum, 0.35 to 0.45 percent of nickel, 0.85 to 2.35 percent of copper, 0.1 to 0.3 percent of titanium, 0.2 to 0.4 percent of vanadium, 0.05 to 0.12 percent of boron, 0.02 to 0.03 percent of antimony, 0.06 to 0.12 percent of niobium, 0.0005 to 0.0015 percent of tellurium, and the balance of iron.
Preferably, trace amounts of semimetals of tellurium, antimony and boron and trace amounts of rare metals of niobium and titanium are added into the abrasive disc material for promoting the development of grain refinement, hardenability, hardness and toughness of the high-chromium cast iron.
Preferably, the specific preparation method comprises the following steps:
1) casting the grinding sheet: smelting in a medium-frequency induction furnace at 1420 ℃ and 1500 ℃, discharging, and casting and molding by using a sand-coated metal mold to prepare a grinding sheet blank;
2) and (3) heat treatment of the grinding sheet: quenching the formed grinding sheet blank twice, wherein isothermal quenching is carried out for 1.5-2.5 hours for the first time at the temperature of 950-; the isothermal quenching for the second time is 1 to 1.5 hours at the temperature of 280 ℃ and 350 ℃;
3) cooling treatment of the grinding sheet: embedding the back surface of the grinding plate into heat-insulating sand while the back surface of the grinding plate is hot, exposing the tooth surface, and adopting a cooling method of air cooling, air cooling and superposition combined spraying, wherein the cooling method can be directionally aligned with the tooth surface of the grinding plate to accelerate the cooling of the tooth surface, so that the hardness of a grinding plate matrix reaches 60-64 HRC; the surface area of the grinding piece rack is smaller and is faster than the cooling speed of the base body, so the surface of the rack is higher than the hardness of the base body, and the surface hardness of the rack is 1-2HRC higher than the hardness of the base body; due to the chilling effect of spray cooling, the cooling speed of the edge of the rack is higher than that of the surface of the rack, so that the hardness of the edge of the rack is higher than that of the surface of the rack by 1-2HRC, the edge of the rack is more wear-resistant and sharper, passivation is not easy to occur, the impact power reaches 8.5-12J/cm2, and the service life is longer;
4) and (3) post-processing of the grinding sheet: after cooling treatment, the product is prepared by shot blasting and polishing treatment.
In the step 2, two times of continuous isothermal quenching are used for changing the solidification process of the high-chromium cast iron, refining crystal grains and reducing the defects of shrinkage cavity and porosity.
In step 3, the surface hardness of the rack is 61-66 HRC.
In step 3, the hardness of the edge of the rack is 62-68 HRC.
In step 3, the grinding plate matrix structure is martensite, lower bainite and retained austenite.
Compared with the prior art, the invention has the beneficial effects that:
the hardness of the grinding sheet matrix is 60-64HRC, the surface hardness of the grinding sheet rack is 61-66HRC, the edge hardness of the grinding sheet rack is 62-68HRC, and the impact work of the edge of the rack reaches 8.5-12J/cm through the chilling of the superposed combined spray2Its hardness, impact toughness and wearability all obtain promoting, and the abrasive disc has realized the good cooperation of intensity with toughness, has the abrasive disc of high toughness, high wearability and high blade sharpness retentivity at work, adapts to the abominable operating mode condition of mill, improves abrasive disc life and cellulose fiber preparation quality.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1. grinding; 2. a substrate; 3. a rack surface; 4. the rack edge.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
according to the principle and the technical scheme of the invention, the chemical components are determined as follows: 3.8% of carbon, 0.9% of silicon, 0.8% of manganese, 32% of chromium, 1.6% of molybdenum, 0.4% of nickel, 1.6% of copper, 0.25% of titanium, 0.3% of vanadium, 0.09% of boron, 0.025% of antimony, 0.09% of niobium, 0.0012% of tellurium and the balance of iron.
Step one, casting of a grinding sheet:
smelting in a medium-frequency induction furnace, discharging at 1480 ℃, and casting and molding by using a sand-coated metal mold to prepare the abrasive disc blank.
Step two, heat treatment of the grinding plate:
quenching the formed grinding plate blank twice, wherein the first isothermal quenching is carried out for 2 hours at the temperature of 960 ℃; the second austempering was carried out for 1 hour at a temperature of 350 ℃. And two times of continuous isothermal quenching are used for changing the solidification process of the high-chromium cast iron, refining crystal grains and reducing the defects of shrinkage cavity and looseness.
Step three, cooling treatment of the grinding plate:
embedding the back surface of the grinding plate 1 into heat-insulating sand while the back surface is hot to expose the tooth surface, and adopting a cooling method of air cooling and overlapping and combining spray, wherein the cooling method can be directionally aligned with the tooth surface of the grinding plate to accelerate the cooling of the tooth surface, so that the hardness of a grinding plate matrix 2 reaches 63 HRC; the cooling speed of the grinding sheet rack surface 3 is higher than that of the base body 2 due to the small area, so that the hardness of the rack surface 3 is higher than that of the base body 2, and the hardness of the rack surface 3 is 64.5 HRC; due to the chilling effect of spray cooling, the cooling speed of the rack edge 4 is higher than that of the rack surface 3, so that the hardness of the rack edge 4 is 1HRC higher than that of the rack surface 3 and reaches 65.5HRC, the rack edge 4 is more wear-resistant and sharper, passivation is not easy to occur, and the impact power reaches 9.8J/cm2The service life is longer; the structure of the grinding plate matrix 2 is martensite, lower bainite and retained austenite, the hardness, impact toughness and wear resistance of the grinding plate matrix are improved, and the grinding plate realizes good matching of strength and toughness.
Step four, post-processing of grinding plates:
after cooling treatment, the rack edge 4 is prepared by shot blasting and polishing treatment, and the prepared abrasive disc has the advantages of being sharper, difficult to passivate, low in abrasion loss, high in toughness, scouring-resistant, cavitation-resistant, corrosion-resistant and the like.
Example 2:
according to the principle and the technical scheme of the invention, the chemical components are determined as follows: 3.6% of carbon, 0.8% of silicon, 0.7% of manganese, 26% of chromium, 1.25% of molybdenum, 0.35% of nickel, 1.8% of copper, 0.20% of titanium, 0.35% of vanadium, 0.1% of boron, 0.02% of antimony, 0.08% of niobium, 0.001% of tellurium and the balance of iron.
Step one, casting of a grinding sheet:
smelting in a medium-frequency induction furnace at 1450 ℃, discharging, and casting and molding by using a sand-coated metal mold to prepare the abrasive disc blank.
Step two, heat treatment of the grinding plate:
quenching the formed abrasive disc blank twice, wherein the first isothermal quenching is carried out for 1.5 hours at the temperature of 980 ℃; the second austempering was carried out for 1.5 hours at a temperature of 320 ℃. And two times of continuous isothermal quenching are used for changing the solidification process of the high-chromium cast iron, refining crystal grains and reducing the defects of shrinkage cavity and looseness.
Step three, cooling treatment of the grinding plate:
embedding the back surface of the grinding plate 1 into heat-insulating sand while the back surface is hot to expose the tooth surface, and adopting a cooling method of air cooling and overlapping and combining spray, wherein the cooling method can be directionally aligned with the tooth surface of the grinding plate to accelerate the cooling of the tooth surface, so that the hardness of a grinding plate base body 2 reaches 62 HRC; the cooling speed of the grinding piece rack surface 3 is higher than that of the base body 2 due to the small area, so that the hardness of the rack surface 3 is higher than that of the base body 2, and the hardness of the rack surface 3 is 63.5 HRC; due to the chilling effect of spray cooling, the cooling speed of the rack edge 4 is higher than that of the rack surface 3, so that the hardness of the rack edge 4 is higher than that of the rack surface 3 by 1.5HRC and reaches 65HRC, the rack edge 4 is more wear-resistant and sharper, passivation is not easy to occur, and the impact power reaches 8.5J/cm2The service life is longer; the structure of the grinding plate matrix 2 is martensite, lower bainite and retained austenite, the hardness, impact toughness and wear resistance of the grinding plate matrix are improved, and the grinding plate realizes good matching of strength and toughness.
Step four, post-processing of grinding plates:
after cooling treatment, the rack edge 4 is prepared by shot blasting and polishing treatment, and the prepared abrasive disc has the advantages of being sharper, difficult to passivate, low in abrasion loss, high in toughness, scouring-resistant, cavitation-resistant, corrosion-resistant and the like.
Example 3:
according to the principle and the technical scheme of the invention, the chemical components are determined as follows: 3.4% of carbon, 1.0% of silicon, 0.6% of manganese, 28% of chromium, 1.45% of molybdenum, 0.45% of nickel, 2.1% of copper, 0.18% of titanium, 0.25% of vanadium, 0.08% of boron, 0.028% of antimony, 0.1% of niobium, 0.0015% of tellurium and the balance of iron.
Step one, casting of a grinding sheet:
smelting in a medium-frequency induction furnace at 1470 ℃, discharging, and casting and molding by using a sand-coated metal mold to obtain the abrasive disc blank.
Step two, heat treatment of the grinding plate:
quenching the formed grinding sheet blank twice, wherein the first isothermal quenching is carried out for 2 hours at the temperature of 1000 ℃; the second austempering was carried out for 1 hour at a temperature of 340 ℃. And two times of continuous isothermal quenching are used for changing the solidification process of the high-chromium cast iron, refining crystal grains and reducing the defects of shrinkage cavity and looseness.
Step three, cooling treatment of the grinding plate:
embedding the back surface of the grinding plate 1 into heat-insulating sand while the back surface is hot to expose the tooth surface, and adopting a cooling method of air cooling and overlapping combined spraying, wherein the cooling method can be directionally aligned with the tooth surface of the grinding plate to accelerate the cooling of the tooth surface, so that the hardness of a grinding plate matrix 2 reaches 63.5 HRC; the cooling speed of the grinding sheet rack surface 3 is higher than that of the base body 2 due to the small area, so that the hardness of the rack surface 3 is higher than that of the base body 2, and the hardness of the rack surface 3 is 64.5 HRC; due to the chilling effect of spray cooling, the cooling speed of the rack edge 4 is higher than that of the rack surface 3, so that the hardness of the rack edge 4 is higher than that of the rack surface 3 by 2HRC and reaches 66.5HRC, the rack edge 4 is more wear-resistant and sharper, passivation is not easy to occur, and the impact power reaches 10.1J/cm2The service life is longer; the structure of the grinding plate matrix 2 is martensite, lower bainite and retained austenite, the hardness, impact toughness and wear resistance of the grinding plate matrix are improved, and the grinding plate realizes good matching of strength and toughness.
Step four, post-processing of grinding plates:
after cooling treatment, the rack edge 4 is prepared by shot blasting and polishing treatment, and the prepared abrasive disc has the advantages of being sharper, difficult to passivate, low in abrasion loss, high in toughness, scouring-resistant, cavitation-resistant, corrosion-resistant and the like.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The preparation method of the sharp-edge grinding plate is characterized by comprising a grinding plate material, wherein the grinding plate material comprises the following components in percentage by weight: 2.8 to 3.8 percent of carbon, 0.6 to 1.2 percent of silicon, 0.5 to 1.1 percent of manganese, 26 to 35 percent of chromium, 1.15 to 2.55 percent of molybdenum, 0.35 to 0.45 percent of nickel, 0.85 to 2.35 percent of copper, 0.1 to 0.3 percent of titanium, 0.2 to 0.4 percent of vanadium, 0.05 to 0.12 percent of boron, 0.02 to 0.03 percent of antimony, 0.06 to 0.12 percent of niobium, 0.0005 to 0.0015 percent of tellurium, and the balance of iron;
the grinding sheet material is added with trace semimetals of tellurium, antimony and boron and trace rare metals of niobium and titanium, and is used for promoting the development of grain refinement, hardenability, hardness and toughness of the high-chromium cast iron;
the preparation method comprises the following steps:
1) casting the grinding sheet: smelting in a medium-frequency induction furnace at 1420 ℃ and 1500 ℃, discharging, and casting and molding by using a sand-coated metal mold to prepare a grinding sheet blank;
2) and (3) heat treatment of the grinding sheet: quenching the formed grinding sheet blank twice, wherein isothermal quenching is carried out for 1.5-2.5 hours for the first time at the temperature of 950-; the isothermal quenching for the second time is 1 to 1.5 hours at the temperature of 280 ℃ and 350 ℃;
3) cooling treatment of the grinding sheet: embedding the back surface of the grinding disc into heat-insulating sand while the back surface of the grinding disc is hot, exposing the tooth surface, and adopting a cooling method of air cooling, air cooling and superposition combined spraying, wherein the cooling method can be directionally aligned with the tooth surface of the grinding disc to accelerate the cooling of the tooth surface, so that the hardness of a grinding disc matrix reaches 60-64 HRC; the surface area of the grinding piece rack is smaller and is faster than the cooling speed of the base body, so the surface of the rack is higher than the hardness of the base body, and the surface hardness of the rack is 1-2HRC higher than the hardness of the base body; because of the chilling effect of spray cooling, the cooling speed of the edge of the rack is higher than that of the surface of the rack, so that the hardness of the edge of the rack is 1-2HRC higher than that of the surface of the rack, the edge of the rack is more wear-resistant and sharper, passivation is not easy to occur, and the impact power reaches 8.5-12J/cm2The service life is longer;
4) and (3) post-processing of the grinding sheet: after cooling treatment, the product is prepared by shot blasting and polishing treatment.
2. The method of claim 1 wherein in step 2, two successive austemperings are used to modify the solidification process of the high chromium cast iron to refine the grains and reduce shrinkage cavity and porosity defects.
3. A method of making a sharp-edge grinding blade according to claim 1 wherein in step 3 the hardness of the rack surface is 61-66 HRC.
4. A method of making a sharp-edge grinding blade according to claim 1 in which in step 3 the hardness of the rack edge is 62-68 HRC.
5. The method of claim 1 wherein in step 3 the blade base structure is martensite + lower bainite + retained austenite.
CN202010499863.3A 2020-06-04 2020-06-04 Sharp edge grinding disc Active CN113755743B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1706976A (en) * 2004-06-10 2005-12-14 宝钢集团上海梅山有限公司 Multielement high-nickel chromium wear-resistant cast iron and its prepn process
CN102851570A (en) * 2012-03-14 2013-01-02 宁波市圣盾机械制造有限公司 High-carbon high-chromium refining plate casting of defibrator
CN110964898A (en) * 2019-12-20 2020-04-07 荆州环球汽车零部件制造有限公司 Induction quenching process for hardening alloy cast iron camshaft by using compressed air

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1706976A (en) * 2004-06-10 2005-12-14 宝钢集团上海梅山有限公司 Multielement high-nickel chromium wear-resistant cast iron and its prepn process
CN102851570A (en) * 2012-03-14 2013-01-02 宁波市圣盾机械制造有限公司 High-carbon high-chromium refining plate casting of defibrator
CN110964898A (en) * 2019-12-20 2020-04-07 荆州环球汽车零部件制造有限公司 Induction quenching process for hardening alloy cast iron camshaft by using compressed air

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