CN113088799A - Low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel and preparation method thereof - Google Patents

Low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel and preparation method thereof Download PDF

Info

Publication number
CN113088799A
CN113088799A CN202110346616.4A CN202110346616A CN113088799A CN 113088799 A CN113088799 A CN 113088799A CN 202110346616 A CN202110346616 A CN 202110346616A CN 113088799 A CN113088799 A CN 113088799A
Authority
CN
China
Prior art keywords
percent
steel
low
less
equal
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
Application number
CN202110346616.4A
Other languages
Chinese (zh)
Inventor
徐涛
马红军
吴振忠
舒美良
王鹏
韩继鹏
常立忠
黄日圣
王宏博
章静能
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Fukai Special Materials Co ltd
Original Assignee
Anhui Fukai Special Materials Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Anhui Fukai Special Materials Co ltd filed Critical Anhui Fukai Special Materials Co ltd
Priority to CN202110346616.4A priority Critical patent/CN113088799A/en
Publication of CN113088799A publication Critical patent/CN113088799A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • C22C33/06—Making ferrous alloys by melting using master alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/005—Manufacture of stainless steel
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/068—Decarburising
    • C21C7/0685—Decarburising of stainless steel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/16—Remelting metals
    • C22B9/18—Electroslag remelting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/16—Remelting metals
    • C22B9/20—Arc remelting
    • 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
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The invention discloses a low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel and a preparation method thereof, wherein the preparation method comprises the following steps: 0.13 to 0.30 percent of C; 0.05 to 0.2 percent of Si; 0.02 to 0.1 percent of Mn; 13.6 to 16.80 percent of Cr; 2.1 to 4.0 percent of Ni; 12.5 to 17 percent of Co; 5% -6% of Mo; w0.7% -2.5%; 0.7 to 1.2 percent of Nb and V; p + S + Ti is less than or equal to 0.025 percent, and Ti is less than or equal to 0.0012 percent; o is less than or equal to 0.0007 percent; n + H is less than or equal to 0.0015 percent, and N is less than or equal to 0.0014 percent; 0.05 to 0.08 percent of Al; 0.005% -0.015% of Ce; 0.005% -0.02% of La; 0.01 to 0.03 percent of Y and the other elements are Fe. The preparation process route comprises the steps of initial smelting of molten steel, AOD refining, LF refining, IC casting, VIM smelting, ESR electroslag remelting and VAR vacuum consumable remelting. Compared with the prior art, the invention has the advantages of lower production cost, better obdurability of the low-carbon stainless bearing steel, longer fatigue life and extremely low content of oxygen and nitrogen impurities.

Description

Low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel and preparation method thereof
Technical Field
The invention belongs to the technical field of metal smelting, and particularly relates to low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel and a preparation method thereof.
Background
Stainless bearing materials are widely used in aerospace, aviation, nuclear industries and high and new technology products, and therefore, the bearing materials are required to have good corrosion resistance, high toughness, high-temperature hardness, long contact fatigue life and the like. However, stainless bearing steel in the prior art generally has high carbon content and high chromium content, so that massive eutectic carbides are inevitably generated, and when the bearing bears a large load in the actual use process, stress concentration is easily caused at the eutectic carbides to generate a fatigue crack source, so that the service performance and the contact fatigue life of the bearing are damaged.
Through retrieval, the Chinese patent with the application number of 202010199297.4 discloses nitrogen-containing stainless bearing steel, wherein the percentage content of each component is 0.25-0.35% of C, 0.5-1.0% of Si, 0.5-1% of Mn, 14-16% of Cr, 0.85-1.1% of Mo, 0.1-0.18% of V, 0.3-0.5% of N, 0.005-0.05% of rare earth elements, less than or equal to 0.5% of Ni, less than or equal to 0.01% of P, and less than or equal to 0.002% of S. Although the carbon content is low, the steel contains high nitrogen, so that the oxygen content in the steel is high in the subsequent smelting process, the purity is poor, and the improvement of the service life of the bearing is also not facilitated. For another example, chinese patent application nos. 202010694806.0 and 201611097136.4 both disclose stainless bearing steels having low carbon content, but both contain nitrogen, and therefore are not vacuum-treated, and have high oxygen content and inclusion content.
In addition, the Chinese patent with application number 201610013209.0 discloses a high-carbon high-strength-and-toughness tungsten-molybdenum composite secondary hardening stainless bearing steel and a preparation method thereof, wherein the components of the high-carbon high-strength-and-toughness tungsten-molybdenum composite secondary hardening stainless bearing steel are 0.20-0.40% of C, 10.0-14.0% of Cr, 2.0-8.0% of Ni, 1.0-5.0% of Mo, 0-2.0% of W, 10-16% of Co, 0-0.6% of V, 0-0.2% of Nb, less than or equal to 0.5% of Si, less than or equal to 0.5% of Mn, less than or equal to 0.01% of S, less than or equal to 0. However, since the composition does not contain Al or contains a low content of aluminum impurity (less than or equal to 0.02%) which is not effective in reducing the oxygen content in steel, if aluminum is not contained, the mere addition of rare earth to steel does not act to deform inclusions, and even if 0.02% of aluminum impurity is contained, the inclusion is not sufficiently denatured due to the low content of rare earth (0.006%). In particular, the titanium content is not specially controlled in the application, the residual titanium content can reach 0.02 percent at most, titanium nitride inclusions formed by N seriously affect the service life of the bearing, and the titanium content of even ordinary bearing steel does not exceed 0.003 percent. In addition, the carbon content and the Cr content in the steel are high and low, which are the most important indexes affecting the rust resistance of the bearing steel, so that the corrosion resistance of the bearing steel is poor. The preparation process adopts a duplex process of vacuum induction and vacuum consumable remelting or electroslag remelting. Vacuum induction and vacuum consumable remelting are adopted, and impurities in steel cannot be effectively adsorbed to electroslag remelting; and vacuum induction and electroslag remelting are adopted, and although the electroslag remelting can adsorb inclusions, the contents of nitrogen and hydrogen in steel cannot be effectively reduced. Therefore, the critical component design and production process of this application cannot ensure the obtainment of ultra-pure stainless bearing steel.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to provide the low-cost ultra-pure high-strength and high-toughness low-carbon stainless bearing steel, which is prepared by optimizing element selection and adopting a reasonable preparation process, and has the characteristics of high strength and toughness, high corrosion resistance, long fatigue life and the like.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention relates to a preparation method of low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel, which comprises the following steps: the method comprises the steps of initial refining of molten steel, AOD refining, LF refining, IC casting, VIM smelting, ESR electroslag remelting and VAR vacuum consumable remelting, and the low-carbon stainless bearing steel with low cost, high purity and high toughness is obtained.
As a further improvement of the invention, in the process of primary smelting of molten steel, firstly, scrap steel is melted in an EAF furnace, the scrap steel is a common Q235 billet, the adding amount of the scrap steel is 420 kg-520 kg/ton steel, a large amount of oxygen is blown in the melting process, and lime is supplemented until the phosphorus content in the molten steel is less than or equal to 0.003%; then removing slag, adding 250-300 kg of high-carbon ferrochrome into each ton of steel, and tapping when C is more than or equal to 2.0 percent and P is less than or equal to 0.01 percent in molten steel after the high-carbon ferrochrome is completely dissolved.
As a further improvement of the invention, in the AOD refining process, oxygen and argon mixed blowing decarburization is carried out, and when the carbon is 0.06% -0.1%, oxygen blowing is stopped; then adding metal cobalt, ferromolybdenum, ferrotungsten and metal nickel, and continuously blowing oxygen until the carbon is less than 0.02%; then, removing slag and tapping; and adding a metal aluminum block, metal silicon, carbon powder, fluorite, lime, bauxite, magnesium balls and quartz sand in the tapping process.
As a further improvement of the invention, 130-165 kg of metal cobalt, 85-96 kg of ferromolybdenum and 11-28 kg of ferrotungsten are added per ton of steel; 23-38 kg of metallic nickel per ton of steel; the weight of the metal aluminum blocks is 0.5 kg/ton steel, the weight of silicon is 0.7kg-2.2 kg/ton steel, and the weight of carbon powder is 1.2 kg-3.2 kg/ton steel; fluorite, lime, magnesium balls and quartz sand 20 kg/ton steel, wherein the weight ratio of the fluorite, the lime, the bauxite, the magnesium balls and the quartz sand is 12-20%, 45-55%, 12-25%, 5-10% and 2-8%.
As a further improvement of the invention, in the LF refining process, adding carbon powder to the slag surface for deoxidation, wherein the carbon powder is added according to the proportion of 1.0-2.0kg per ton of steel; controlling the white slag to be kept for more than 2 hours, and adding ferrocolumbium of 0.9-1.6 kg per ton of steel and ferrovanadium of 10-13 kg per ton of steel when the white slag is kept for 1.0-1.5 hours; the percentage of each element in the molten steel in the final stage of LF refining is as follows: 0.16 to 0.33 percent of C; 0.05 to 0.2 percent of Si; mn is less than or equal to 0.15 percent; 14.0 to 17.0 percent of Cr; 2.3 to 4.0 percent of Ni; 13.0 to 16 percent of Co; 5% -6% of Mo; w0.7% -2.0%; 0.7 to 1.2 percent of Nb and V; p + S + Ti is less than or equal to 0.025 percent; al is less than or equal to 0.002%; o is less than or equal to 40ppm, and N is 150-300 ppm; h is less than or equal to 8ppm, and other elements are Fe.
As a further improvement of the invention, in the IC casting process, the bottom casting method is adopted under the protection of argon, and the superheat degree of casting is not lower than 50 ℃.
As a further improvement of the invention, before the VIM smelting process is carried out, the IC cast steel ingot is forged into a round bar with the diameter of 100mm, and then the round bar with the diameter of 80mm is machined, namely the round bar is used as a raw material for VIM smelting; in the VIM smelting process, melting for 4-5 hours under the pressure of less than 20Pa, after the materials are completely melted and the pressure is less than or equal to 3Pa, transferring to a refining period, after refining for 1-2 hours, adding aluminum particles according to 0.5-0.8 kg per ton of steel, after refining for 0.5-1 hour, adding Ce according to 0.02-0.2 kg per ton of steel, 0.03-0.3 kg of La and 0.2-0.4 kg of Y, after refining for 1-2 hours, tapping under vacuum, and casting to form the consumable electrode.
As a further improvement of the inventionControlling the oxygen content in the electroslag remelting protective cover to be less than 50ppm in the ESR electroslag remelting process; the percentage of each component of the slag system in the total weight is as follows: CaF2 44％-58％，CaO 10％～15％，BaO5％～10％，CeO2 1％～5％，La2O3 8％～12％，Y2O310% -15%; the remelting speed is controlled to be 0.90-1.0 x DDiameter of electroslag ingotkg/hour; electroslag remelting adopts voltage swing control, and the swing value is +/-2-3V.
As a further improvement of the invention, an electroslag ingot obtained by ESR electroslag remelting is used as an electrode of a vacuum consumable ingot, and forging and scalping treatment are carried out on the electroslag ingot; and performing VAR vacuum consumable remelting on the treated electrode, wherein in the VAR vacuum consumable remelting process, the remelting speed is controlled to be 1.5-2.5kg/min, and the vacuum pressure is less than or equal to 0.2 Pa.
The invention relates to low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel which is characterized by comprising the following components in percentage by weight: the percentage of each element in the total weight is as follows: 0.13 to 0.30 percent of C; 0.05 to 0.2 percent of Si; 0.02 to 0.1 percent of Mn; 13.6 to 16.80 percent of Cr; 2.1 to 4.0 percent of Ni; 12.5 to 17 percent of Co; 5% -6% of Mo; w0.7% -2.5%; 0.7 to 1.2 percent of Nb and V; p + S + Ti is less than or equal to 0.025 percent, and Ti is less than or equal to 0.0012 percent; o is less than or equal to 0.0007 percent; n + H is less than or equal to 0.0015 percent, and N is less than or equal to 0.0014 percent; 0.05 to 0.08 percent of Al; 0.005% -0.015% of Ce; 0.005% -0.02% of La; 0.01 to 0.03 percent of Y and the other elements are Fe.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
(1) according to the low-cost ultra-pure high-strength-toughness low-carbon stainless bearing steel, the content of each element of the stainless bearing steel is reasonably controlled, the low-carbon component is adopted, the strength reduction loss caused by low carbon is compensated by Co and W while the formation of eutectic carbide by high carbon and chromium is effectively avoided, and the strength toughness and corrosion resistance of the stainless bearing steel are further improved; meanwhile, the content of Al element is strictly controlled to ensure that the oxygen content in the steel is reduced to an extremely low level, and the content of impurities in the steel is reduced by adopting control elements Ce, La and Y and composite deformation, so that the quality of the stainless bearing steel is ensured;
(2) the preparation method of the low-cost ultra-pure high-strength-toughness low-carbon stainless bearing steel takes common ferroalloy as a transportation material, and the oxygen content in the raw material is reduced to 30-50ppm through the process of molten steel primary smelting, AOD refining, LF refining and IC casting, so that conditions are created for subsequent processes of VIM smelting, ESR electroslag remelting, VAR vacuum consumable remelting and the like, the quality of the stainless bearing steel is ensured, and the requirement for high-end stainless bearing steel on the market is met;
(3) according to the preparation method of the low-cost ultra-pure high-strength-toughness low-carbon stainless bearing steel, in order to improve the quality of the stainless bearing steel in the prior art, pure metal materials are often selected as raw materials to be proportioned and melted, the purpose is to reduce the oxygen content brought by the raw materials as far as possible, however, the price of various metal materials is very high, so that the competitiveness of a final product is not strong; in addition, even if pure metal materials are selected as raw materials, oxygen is inevitably introduced, so that the quality of stainless bearing steel is influenced, in the VIM smelting process, firstly, aluminum particles are added, meanwhile, the adding amount of the aluminum particles is strictly controlled, oxygen in molten steel is further removed through the aluminum particles, meanwhile, alumina inclusion is formed in the molten steel, and then, Ce, La and Y are reasonably added, and the aluminum inclusion and the Ce, La and Y are subjected to chemical reaction under the composite action of Ce, La and Y, so that the formed spherical inclusion is easy to float upwards, and the oxygen content and the inclusion content in the steel are effectively controlled;
(4) according to the preparation method of the low-cost ultra-pure high-strength-toughness low-carbon stainless bearing steel, in the ESR electroslag remelting process, a low-oxygen slag system is adopted, so that large particles in electrodes can be adsorbed to remove impurities greatly, the oxygen content in the steel is reduced, and the sulfur content in the steel is further reduced, so that the purity of the stainless bearing steel is improved; in addition, by controlling the swing amplitude and the remelting speed of the voltage, an electroslag ingot with a smooth surface can be ensured to be obtained, and the yield of stainless bearing steel materials is improved;
(5) according to the preparation method of the low-cost ultra-pure high-strength-toughness low-carbon stainless bearing steel, an electroslag ingot obtained by ESR electroslag remelting is remelted through VAR vacuum consumable remelting, so that the content of gas in the steel is further reduced, the purity of the stainless bearing steel is improved, and in addition, in the vacuum consumable remelting process, the remelting speed and the vacuum pressure are controlled, so that the solidification structure is improved, and the performance of the stainless bearing steel is improved.
Detailed Description
For a further understanding of the present invention, reference will now be made to the following examples.
Example 1
The low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel of the embodiment comprises the following elements in percentage by weight: 0.13 percent of C; 0.15 percent of Si; 0.08 percent of Mn; 14.60 percent of Cr; 2.1 percent of Ni; 17% of Co; 5.7 percent of Mo; 2.3 percent of W; 0.04 percent of Nb; v0.92%; p0.013%; 0.0004% of S; 0.0011% of Ti; o0.0005%; 0.0011% of N; h0.0001%; 0.05 percent of Al; ce 0.009%; 0.018% of La; y is 0.027%, and the other element is Fe.
Example 2
The low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel of the embodiment comprises the following elements in percentage by weight: 0.16 percent of C; 0.12 percent of Si; 0.07 percent of Mn; 15% of Cr; 3.3 percent of Ni; 14.8 percent of Co; 5.5 percent of Mo; 1.7 percent of W; 0.07 percent of Nb; v1.1%; p is 0.016 percent; 0.0008% of S; 0.0010% of Ti; o0.0005%; n0.0009%; h0.00009%; 0.06 percent of Al; ce 0.011%; la 0.012%; y is 0.021%, and the other elements are Fe.
Example 3
The low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel of the embodiment comprises the following elements in percentage by weight: 0.30 percent of C; 0.05 percent of Si; 0.07 percent of Mn; 16.20 percent of Cr; 4.0 percent of Ni; 16.0 percent of Co; mo is 6 percent; 2.2 percent of W; 0.067 percent of Nb; v1.0%; p0.014%; 0.0007% of S; 0.0008 percent of Ti; 0.0006 percent of O; 0.0010% of N; h0.000088%; 0.08 percent of Al; ce 0.012%; 0.016% of La; y is 0.023 percent, and the other elements are Fe.
The invention relates to a preparation method of low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel, which comprises the following steps:
step one, primary smelting of molten steel
The initial smelting of the molten steel is completed in an EAF furnace. The specific process is as follows:
firstly, melting scrap steel in an EAF furnace, wherein the scrap steel is a common Q235 billet, the addition amount of the scrap steel is 480 kg/ton steel, a large amount of oxygen is blown in the melting process of the scrap steel, and lime is supplemented until the phosphorus content in molten steel is less than or equal to 0.003 percent;
then removing slag on the molten steel, adding 275 kg/ton of high-carbon ferrochrome, and tapping when C is more than or equal to 2.0 percent and P is less than or equal to 0.01 percent after the high-carbon ferrochrome is completely melted.
Step two, AOD refining
Refining the primarily refined molten steel in an AOD furnace, performing oxygen and argon mixed blowing decarburization in the AOD refining process, and stopping oxygen blowing when the carbon content is 0.06% -0.1%; then adding metal cobalt, ferromolybdenum, ferrotungsten and metal nickel, and continuously blowing oxygen until the carbon content is less than 0.02%; then, removing slag and tapping; and adding a metal aluminum block, metal silicon, carbon powder, fluorite, lime, bauxite, magnesium balls and quartz sand in the tapping process.
In the tapping process, the metal cobalt is 140 kg/ton steel, ferromolybdenum is 91 kg/ton steel, and ferrotungsten is 16 kg/ton steel; 28kg of metallic nickel per ton of steel; adding metal aluminum blocks according to the adding amount of 0.5 kg/ton steel, adding silicon according to the adding amount of 0.7 kg/ton steel, and adding carbon powder according to the adding amount of 2.2 kg/ton steel; in addition, fluorite, lime, magnesium balls and quartz sand are added according to the addition amount of 20 kg/ton steel, and the proportion of each component is 12-20% of fluorite, 40-50% of lime, 8-20% of bauxite, 5-7% of magnesium balls and 2-6% of quartz sand.
Preferably, the amount of fluorite added in this example is 19%, the amount of lime added is 50%, the amount of bauxite added is 18%, the amount of magnesium balls added is 7%, and the amount of quartz sand added is 6%.
Step three, LF refining
In the LF refining process, carbon powder is added to the slag surface, oxygen in molten steel is removed through the carbon powder, and the carbon powder in the embodiment is added according to the amount of 2.0 kg/ton of steel; controlling the white slag holding time to be 3 hours;
it is noted that in this example, ferroniobium (1.2 kg/ton) and ferrovanadium (12 kg/ton) were added to the steel while the white slag was maintained for 1.5 hours.
It is worth to say that the white slag is kept for 1.0 hour, and then is in a reducing atmosphere, so that the yield of the added ferrocolumbium and ferrovanadium is high. In addition, a certain time is required to be reserved between the completion of adding the ferrocolumbium and the ferrovanadium and the tapping, and firstly, the time is required to ensure that the alloy is completely dissolved and uniform; and secondly, the alloy can bring impurities inevitably, and the impurities can be fully floated and removed after a period of time.
In the embodiment, at the last stage of LF refining, the molten steel contains the following elements in percentage by weight: 0.33 percent of C; 0.08 percent of Si; 0.12 percent of Mn; 17.0 percent of Cr; 3.8 percent of Ni; 15.6 percent of Co; 5.9 percent of Mo; 2.0% of W; v1.1%; 0.068 percent of Nb; 0.014% of P, 0.0008% of S and 0.006% of Ti; o0.0030%; 0.015% of N and 0.0008% of H; 0.002% of Al; the other element is Fe.
Step four, IC casting
In the IC casting process, bottom casting is adopted under the protection of argon, and the degree of superheat of casting is not lower than 50 ℃.
Step five, VIM smelting
Before the VIM smelting process, forging the IC-cast steel ingot into a round bar with the diameter of 100mm, then machining the round bar into a round bar with the diameter of 80mm, namely serving as a raw material for VIM smelting, and then smelting;
in the VIM smelting process, under the condition that the pressure is less than 20Pa, the melting time is controlled for 4.8 hours, after the alloy is completely melted and the pressure is less than or equal to 3Pa, the refining period is shifted, after refining is carried out for 1.7 hours, aluminum particles are added according to 0.73kg per ton of steel, after refining is continued for 0.9 hour, the aluminum particles are added according to 0.15kg Ce, 0.22kg La and 0.28kg Y per ton of steel, refining is carried out for 1.6 hours, finally steel is tapped under vacuum, and a consumable electrode is cast.
Sixthly, ESR electroslag remelting
And (4) peeling the consumable electrode cast in the step five until the surface is bright, and then carrying out gas protection electroslag remelting.
Controlling electroslag weight in ESR electroslag remelting processThe oxygen content in the fused protective cover is less than 50 ppm; the percentage of each component of the slag system in the total weight is as follows: CaF2 52％，CaO 13％，BaO 9％，CeO2 3％，La2O3 11％，Y2O312 percent; the remelting rate was controlled to 0.94 × DDiameter of electroslag ingotkg/hour; the electroslag remelting working voltage is 40-60V, on the basis, voltage swing control is adopted, and the swing value is +/-2-3V.
Step seven, VAR vacuum consumable remelting
Taking an electroslag ingot obtained by ESR electroslag remelting as an electrode of a vacuum consumable ingot, and forging and scalping the electrode; and performing VAR vacuum consumable remelting on the treated electrode, wherein in the VAR vacuum consumable remelting process, the remelting speed is controlled to be 2.2kg/min, and the vacuum pressure is less than or equal to 0.2 Pa. Finally, the low-carbon stainless bearing steel of the present example was obtained.
Example 4
The low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel of the embodiment comprises the following elements in percentage by weight: 0.28 percent of C; 0.17% of Si; 0.05 percent of Mn; 16.60 percent of Cr; 3.5 percent of Ni; 13.2 percent of Co; 5.2 percent of Mo; 1.2 percent of W; 0.05 percent of Nb; v0.87%; p0.014%; 0.0005% of S; 0.0010% of Ti; 0.0007 percent of O; 0.0012% of N; h0.00008%; 0.05 percent of Al; ce 0.012%; 0.017 percent of La; y is 0.022%, and the other elements are Fe.
The invention relates to a preparation method of low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel, which comprises the following steps:
step one, primary smelting of molten steel
The initial smelting of the molten steel is completed in an EAF furnace. The specific process is as follows:
firstly, melting scrap steel in an EAF furnace, wherein the scrap steel is a common Q235 billet, the adding amount of the scrap steel is 500 kg/ton steel, a large amount of oxygen is blown in the melting process of the scrap steel, and lime is supplemented until the phosphorus content in molten steel is less than or equal to 0.003 percent;
then removing slag on the molten steel, adding 290kg of high-carbon ferrochrome per ton of steel, and tapping when C is more than or equal to 2.0 percent and P is less than or equal to 0.01 percent after the high-carbon ferrochrome is completely dissolved.
Step two, AOD refining
Refining the primarily refined molten steel in an AOD furnace, performing oxygen and argon mixed blowing decarburization in the AOD refining process, and stopping oxygen blowing when the carbon content is 0.06% -0.1%; then adding metal cobalt, ferromolybdenum, ferrotungsten and metal nickel, and continuously blowing oxygen until the carbon content is less than 0.02%; then, removing slag and tapping; and adding a metal aluminum block, metal silicon, carbon powder, fluorite, lime, bauxite, magnesium balls and quartz sand in the tapping process.
In the tapping process, 150kg of metal cobalt, 88kg of ferromolybdenum and 17kg of ferrotungsten are added per ton of steel; 32kg of metallic nickel per ton of steel; adding metal aluminum blocks according to the adding amount of 0.5 kg/ton steel, adding silicon according to the adding amount of 1.2 kg/ton steel, and adding carbon powder according to the adding amount of 3.2 kg/ton steel; in addition, fluorite, lime, magnesium balls and quartz sand are added according to the addition amount of 20 kg/ton steel, and the proportion of each component is 20 percent of fluorite, 50 percent of lime, 17 percent of bauxite, 7 percent of magnesium balls and 6 percent of quartz sand.
Step three, LF refining
In the LF refining process, carbon powder is added to the slag surface, oxygen in molten steel is removed through the carbon powder, and the carbon powder in the embodiment is added according to the amount of 2.0 kg/ton of steel; controlling the white slag holding time to be 3 hours;
it is noted that in this example, 1.4kg of ferrocolumbium and 13kg of ferrovanadium were added per ton of steel while the white slag was kept for 1.5 hours.
In the embodiment, at the last stage of LF refining, the molten steel contains the following elements in percentage by weight: 0.33 percent of C; 0.19 percent of Si; 0.15 percent of Mn; 16.9 percent of Cr; 3.5 percent of Ni; 13.3 percent of Co; 5.2 percent of Mo; 1.2 percent of W; v0.87%; 0.04 percent of Nb; 0.014% of P, 0.0008% of S and 0.0026% of Ti; 0.0040% of O; 0.013 percent of N; h0.0006%; 0.0018% of Al; the other element is Fe.
Step four, IC casting
In the IC casting process, bottom casting is adopted under the protection of argon, and the degree of superheat of casting is not lower than 50 ℃.
Step five, VIM smelting
Before the VIM smelting process, forging the IC-cast steel ingot into a round bar with the diameter of 100mm, then machining the round bar into a round bar with the diameter of 80mm, namely serving as a raw material for VIM smelting, and then smelting;
in the VIM smelting process, under the condition that the pressure is less than 20Pa, the melting time is controlled for 4.6 hours, after the alloy is completely melted and the pressure is less than or equal to 3Pa, the refining period is shifted, after refining is carried out for 1.4 hours, aluminum particles are added according to 0.76kg per ton of steel, after refining is continued for 1.3 hours, the aluminum particles are added according to 0.16kg Ce, 0.19kg La and 0.33kg Y per ton of steel, refining is carried out for 1.7 hours, finally steel is tapped under vacuum, and the consumable electrode is cast.
Sixthly, ESR electroslag remelting
And (4) peeling the consumable electrode cast in the step five until the surface is bright, and then carrying out gas protection electroslag remelting.
Controlling the oxygen content in the electroslag remelting protective cover to be less than 50ppm in the ESR electroslag remelting process; the percentage of each component of the slag system in the total weight is as follows: CaF2 58％，CaO 14％，BaO 6％，CeO2 3％，La2O3 8％，Y2O311 percent; the remelting rate was controlled to 0.90 x DDiameter of electroslag ingotkg/hour; the electroslag remelting working voltage is 40-60V, on the basis, voltage swing control is adopted, and the swing value is +/-2-3V.
Step seven, VAR vacuum consumable remelting
Taking an electroslag ingot obtained by ESR electroslag remelting as an electrode of a vacuum consumable ingot, and forging and scalping the electrode; and performing VAR vacuum consumable remelting on the treated electrode, wherein in the VAR vacuum consumable remelting process, the remelting speed is controlled to be 1.7kg/min, and the vacuum pressure is less than or equal to 0.2 Pa. Finally, the low-carbon stainless bearing steel of the present example was obtained.
Example 5
The low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel of the embodiment comprises the following elements in percentage by weight: c0.16; 0.1 percent of Si; 0.05 percent of Mn; 16.5 percent of Cr; 3.0 percent of Ni; 14% of Co; 5.2 percent of Mo; 1.2 percent of W; v1.1%; 0.02 percent of Nb; 0.014% of P, 0.0004% of S and 0.0012% of Ti; o0.0005%; n0.0014%, H0.00007%; 0.06 percent of Al; 0.015% of Ce; 0.02% of La; y is 0.03 percent, and the other elements are Fe.
The invention relates to a preparation method of low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel, which comprises the following steps:
step one, primary smelting of molten steel
The initial smelting of the molten steel is completed in an EAF furnace. The specific process is as follows:
firstly, melting scrap steel in an EAF furnace, wherein the scrap steel is a common Q235 steel billet, the addition amount of the scrap steel is 440 kg/ton steel, a large amount of oxygen is blown in the melting process of the scrap steel, and lime is supplemented until the phosphorus content in molten steel is less than or equal to 0.003 percent;
then removing slag on the molten steel, adding 260kg of high-carbon ferrochrome per ton of steel, and tapping when C is more than or equal to 2.0 percent and P is less than or equal to 0.01 percent after the high-carbon ferrochrome is completely dissolved.
Step two, AOD refining
Refining the primarily refined molten steel in an AOD furnace, performing oxygen and argon mixed blowing decarburization in the AOD refining process, and stopping oxygen blowing when the carbon content is 0.06% -0.1%; then adding metal cobalt, ferromolybdenum, ferrotungsten and metal nickel, and continuously blowing oxygen until the carbon content is less than 0.02%; then, removing slag and tapping; and adding a metal aluminum block, metal silicon, carbon powder, fluorite, lime, bauxite, magnesium balls and quartz sand in the tapping process.
In the tapping process, 145kg of metal cobalt, 87kg of ferromolybdenum and 14kg of ferrotungsten are added per ton of steel; 23kg of metallic nickel per ton of steel; adding metal aluminum blocks according to the adding amount of 0.5 kg/ton steel, adding silicon according to the adding amount of 1.3 kg/ton steel, and adding carbon powder according to the adding amount of 2.2 kg/ton steel; in addition, fluorite, lime, magnesium balls and quartz sand are added according to the addition amount of 20 kg/ton steel, and the proportion of each component is 12-20% of fluorite, 40-50% of lime, 8-20% of bauxite, 5-7% of magnesium balls and 2-6% of quartz sand.
Preferably, the amount of fluorite added in this example is 19%, the amount of lime added is 50%, the amount of bauxite added is 20%, the amount of magnesium balls added is 7%, and the amount of quartz sand added is 4%.
Step three, LF refining
In the LF refining process, carbon powder is added to the slag surface, oxygen in molten steel is removed through the carbon powder, and the carbon powder in the embodiment is added according to the amount of 2.0 kg/ton of steel; controlling the white slag holding time to be 2.5 hours;
it is noted that in this example, 1.0kg of ferrocolumbium and 11kg of ferrovanadium were added per ton of steel while the white slag was kept for 1.4 hours.
In the embodiment, at the last stage of LF refining, the molten steel contains the following elements in percentage by weight: 0.18 percent of C; 0.12 percent of Si; 0.15 percent of Mn; 16.8 percent of Cr; 3.0 percent of Ni; 14% of Co; 5.2 percent of Mo; 1.2 percent of W; v1.1%; 0.02 percent of Nb; 0.015 percent of P, 0.0006 percent of S and 0.0015 percent of Ti; 0.0040% of O; 0.01 percent of N; h0.0005%; 0.002% of Al; the other element is Fe.
Step four, IC casting
In the IC casting process, bottom casting is adopted under the protection of argon, and the degree of superheat of casting is not lower than 50 ℃.
Step five, VIM smelting
Before the VIM smelting process, forging the IC-cast steel ingot into a round bar with the diameter of 100mm, then machining the round bar into a round bar with the diameter of 80mm, namely serving as a raw material for VIM smelting, and then smelting;
in the VIM smelting process, under the condition that the pressure is less than 20Pa, the melting time is controlled for 5 hours, after the alloy is completely melted, the refining period is shifted when the pressure is less than or equal to 3Pa, aluminum particles are added according to 0.62kg of steel per ton after refining is carried out for 2 hours, aluminum particles are added according to 0.18kg of Ce, 0.22kg of La and 0.35kg of Y per ton after refining is carried out for 1 hour, then refining is carried out for 1 hour, finally steel is tapped under vacuum, and the consumable electrode is cast.
Sixthly, ESR electroslag remelting
And (4) peeling the consumable electrode cast in the step five until the surface is bright, and then carrying out gas protection electroslag remelting.
Controlling the oxygen content in the electroslag remelting protective cover to be less than 50ppm in the ESR electroslag remelting process; the percentage of each component of the slag system in the total weight is as follows: CaF2 52％，CaO 12％，BaO 8％，CeO2 5％，La2O3 10％，Y2O313 percent; the remelting rate was controlled to 0.96 × DDiameter of electroslag ingotkg/hour; the electroslag remelting working voltage is 40-60V, on the basis, voltage swing control is adopted, and the swing value is +/-2-3V.
Step seven, VAR vacuum consumable remelting
Taking an electroslag ingot obtained by ESR electroslag remelting as an electrode of a vacuum consumable ingot, and forging and scalping the electrode; and performing VAR vacuum consumable remelting on the treated electrode, wherein in the VAR vacuum consumable remelting process, the remelting speed is controlled to be 2.0kg/min, and the vacuum pressure is less than or equal to 0.2 Pa. Finally, the low-carbon stainless bearing steel of the present example was obtained.
The low carbon stainless bearing steel was smelted according to the manufacturing methods of examples 3 to 5, and the contents of impurity elements and inclusion gases were as follows:
TABLE 1 impurity element and gas content
Examples P/％ S/ppm O/ppm N/ppm H/ppm Ti/ppm
Example 3 0.014 7 6 10 ＜1.0 8
Example 4 0.014 5 7 12 ＜1.0 10
Example 5 0.014 4 5 14 ＜1.0 12
TABLE 2 inclusion rating
Examples A B C D DS
Example 3 0 0 0 0 0
Example 4 0 0 0 0.5 0
Example 5 0 0 0 0.5 0
As is clear from tables 1 and 2, the low carbon stainless bearing steel had a low content of impurity elements and gases, and A, B, C, DSThe grade of the class-D inclusion is zero grade, and the grade of the class-D inclusion is less than or equal to 0.5 grade, so that the low-carbon stainless bearing steel prepared by the preparation method is low in oxygen content and high in purity.

Claims (10)

1. A preparation method of low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel is characterized by comprising the following steps: the process is as follows: the method comprises the steps of initial refining of molten steel, AOD refining, LF refining, IC casting, VIM smelting, ESR electroslag remelting and VAR vacuum consumable remelting, and the low-carbon stainless bearing steel with low cost, high purity and high toughness is obtained.
2. The method for preparing the low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel according to claim 1, characterized by comprising the following steps: in the process of primary smelting of molten steel, firstly, melting scrap steel in an EAF furnace, wherein the scrap steel is a common Q235 billet, the addition amount of the scrap steel is 420 kg-520 kg per ton of steel, blowing oxygen in a large amount in the melting process, and supplementing lime until the phosphorus content in the molten steel is less than or equal to 0.003%; then removing slag, adding 250-300 kg of high-carbon ferrochrome into each ton of steel, and tapping when C is more than or equal to 2.0 percent and P is less than or equal to 0.01 percent in molten steel after the high-carbon ferrochrome is completely dissolved.
3. The method for preparing the low-cost ultra-pure high-toughness low-carbon stainless bearing steel according to claim 2, wherein the method comprises the following steps: in the AOD refining process, oxygen and argon mixed blowing decarburization is carried out, and when the carbon content is 0.06% -0.1%, oxygen blowing is stopped; then adding metal cobalt, ferromolybdenum, ferrotungsten and metal nickel, and continuously blowing oxygen until the carbon is less than 0.02%; then, removing slag and tapping; and adding a metal aluminum block, metal silicon, carbon powder, fluorite, lime, bauxite, magnesium balls and quartz sand in the tapping process.
4. The method for preparing the low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel according to claim 3, wherein the method comprises the following steps: 130-165 kg of metal cobalt, 85-96 kg of ferromolybdenum and 11-28 kg of ferrotungsten are added per ton of steel; 23-38 kg of metallic nickel per ton of steel; the weight of the metal aluminum blocks is 0.5 kg/ton steel, the weight of silicon is 0.7kg-2.2 kg/ton steel, and the weight of carbon powder is 1.2 kg-3.2 kg/ton steel; fluorite, lime, magnesium balls and quartz sand 20 kg/ton steel, wherein the weight ratio of the fluorite, the lime, the bauxite, the magnesium balls and the quartz sand is 12-20%, 45-55%, 12-25%, 5-10% and 2-8%.
5. The method for preparing the low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel according to claim 4, wherein the method comprises the following steps: in the LF refining process, adding carbon powder to the slag surface for deoxidation, wherein the carbon powder is added according to the proportion of 1.0-2.0kg per ton of steel; controlling the white slag to be kept for more than 2 hours, and adding ferrocolumbium of 0.9-1.6 kg per ton of steel and ferrovanadium of 10-13 kg per ton of steel when the white slag is kept for 1.0-1.5 hours; the percentage of each element in the molten steel in the final stage of LF refining is as follows: 0.16 to 0.33 percent of C; 0.05 to 0.2 percent of Si; mn is less than or equal to 0.15 percent; 14.0 to 17.0 percent of Cr; 2.3 to 4.0 percent of Ni; 13.0 to 16 percent of Co; 5% -6% of Mo; w0.7% -2.0%; 0.7 to 1.2 percent of Nb and V; p + S + Ti is less than or equal to 0.025 percent; al is less than or equal to 0.002%; less than or equal to 0.004 percent of O and 0.015 to 0.03 percent of N; h is less than or equal to 0.0008 percent, and the other elements are Fe.
6. The method for preparing the low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel according to claim 5, wherein the method comprises the following steps: in the IC casting process, bottom casting is adopted under the protection of argon, and the degree of superheat of casting is not lower than 50 ℃.
7. The method for preparing the low-cost ultrapure high-toughness low-carbon stainless bearing steel according to any one of claims 1 to 6, wherein the method comprises the following steps: before the VIM smelting process, forging the IC-cast steel ingot into a round bar with the diameter of 100mm, and then machining the round bar into a round bar with the diameter of 80mm, namely the round bar is used as a raw material for VIM smelting; in the VIM smelting process, melting for 4-5 hours under the pressure of less than 20Pa, after the materials are completely melted and the pressure is less than or equal to 3Pa, transferring to a refining period, after refining for 1-2 hours, adding aluminum particles according to 0.5-0.8 kg per ton of steel, after refining for 0.5-1 hour, adding Ce according to 0.02-0.2 kg per ton of steel, 0.03-0.3 kg of La and 0.2-0.4 kg of Y, after refining for 1-2 hours, tapping under vacuum, and casting into a consumable electrode.
8. The method for preparing the low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel according to claim 7, wherein the method comprises the following steps: controlling the oxygen content in the electroslag remelting protective cover to be less than 50ppm in the ESR electroslag remelting process; the percentage of each component of the slag system in the total weight is as follows: CaF2 44％-58％，CaO 10％～15％，BaO 5％～10％，CeO2 1％～5％，La2O3 8％～12％，Y2O310% -15%; the remelting speed is controlled to be 0.90-1.0 x DDiameter of electroslag ingotkg/hour; voltage swing control for electroslag remeltingThe swing value is +/-2-3V.
9. The method for preparing the low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel according to claim 8, wherein the method comprises the following steps: taking an electroslag ingot obtained by ESR electroslag remelting as an electrode of a vacuum consumable ingot, and forging and scalping the electrode; and performing VAR vacuum consumable remelting on the treated electrode, wherein in the VAR vacuum consumable remelting process, the remelting speed is controlled to be 1.5-2.5kg/min, and the vacuum pressure is less than or equal to 0.2 Pa.
10. A low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel is characterized in that: the percentage of each element in the total weight is as follows: 0.13 to 0.30 percent of C; 0.05 to 0.2 percent of Si; 0.02 to 0.1 percent of Mn; 13.6 to 16.80 percent of Cr; 2.1 to 4.0 percent of Ni; 12.5 to 17 percent of Co; 5% -6% of Mo; w0.7% -2.5%; 0.7 to 1.2 percent of Nb and V; p + S + Ti is less than or equal to 0.025 percent, and Ti is less than or equal to 0.0012 percent; o is less than or equal to 0.0007 percent; n + H is less than or equal to 0.0015 percent, and N is less than or equal to 0.0014 percent; 0.05 to 0.08 percent of Al; 0.005% -0.015% of Ce; 0.005% -0.02% of La; 0.01 to 0.03 percent of Y and the other elements are Fe.
CN202110346616.4A 2021-03-31 2021-03-31 Low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel and preparation method thereof Pending CN113088799A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110346616.4A CN113088799A (en) 2021-03-31 2021-03-31 Low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110346616.4A CN113088799A (en) 2021-03-31 2021-03-31 Low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel and preparation method thereof

Publications (1)

Publication Number Publication Date
CN113088799A true CN113088799A (en) 2021-07-09

Family

ID=76671556

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110346616.4A Pending CN113088799A (en) 2021-03-31 2021-03-31 Low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel and preparation method thereof

Country Status (1)

Country Link
CN (1) CN113088799A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114032450A (en) * 2021-09-24 2022-02-11 苏州金立鑫特材科技有限公司 Ultra-pure stainless steel for semiconductor manufacturing industry
CN114990456A (en) * 2022-06-13 2022-09-02 成都先进金属材料产业技术研究院股份有限公司 High-strength and high-toughness stainless steel and ultrahigh-purity and high-structure uniformity control method thereof
CN114990455A (en) * 2022-06-13 2022-09-02 成都先进金属材料产业技术研究院股份有限公司 High-toughness stainless steel and ultrapure purification smelting method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1414118A (en) * 2002-06-26 2003-04-30 宝钢集团上海五钢有限公司 Production method of small square billet continuous casting bearing steel
US20050173092A1 (en) * 2004-02-10 2005-08-11 Kennedy Richard L. Method and apparatus for reducing segregation in metallic ingots
US20140144557A1 (en) * 2012-11-29 2014-05-29 Yanshan University Method for producing low temperature bainite steel containing aluminum
CN105603329A (en) * 2016-01-09 2016-05-25 钢铁研究总院 High-carbon and high-strength-and-toughness tungsten-molybdenum composite secondary hardening stainless bearing steel and preparation method
CN108118260A (en) * 2017-12-26 2018-06-05 钢铁研究总院 A kind of stainless Bearing gear steel of superpower superhard high temperature and preparation method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1414118A (en) * 2002-06-26 2003-04-30 宝钢集团上海五钢有限公司 Production method of small square billet continuous casting bearing steel
US20050173092A1 (en) * 2004-02-10 2005-08-11 Kennedy Richard L. Method and apparatus for reducing segregation in metallic ingots
US20140144557A1 (en) * 2012-11-29 2014-05-29 Yanshan University Method for producing low temperature bainite steel containing aluminum
CN105603329A (en) * 2016-01-09 2016-05-25 钢铁研究总院 High-carbon and high-strength-and-toughness tungsten-molybdenum composite secondary hardening stainless bearing steel and preparation method
CN108118260A (en) * 2017-12-26 2018-06-05 钢铁研究总院 A kind of stainless Bearing gear steel of superpower superhard high temperature and preparation method

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
何曲波: ""VIM-ESR-VAR三联冶炼工艺对9Cr18Mo轴承钢洁净度的影响"", 《特殊钢》 *
曲英 等: "《魏寿昆文集 第2卷》", 30 April 2019 *
李彬 等: ""AOD－LF－VD－CC工艺生产轴承钢洁净度的研究"", 《黑龙江冶金》 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114032450A (en) * 2021-09-24 2022-02-11 苏州金立鑫特材科技有限公司 Ultra-pure stainless steel for semiconductor manufacturing industry
CN114990456A (en) * 2022-06-13 2022-09-02 成都先进金属材料产业技术研究院股份有限公司 High-strength and high-toughness stainless steel and ultrahigh-purity and high-structure uniformity control method thereof
CN114990455A (en) * 2022-06-13 2022-09-02 成都先进金属材料产业技术研究院股份有限公司 High-toughness stainless steel and ultrapure purification smelting method thereof
CN114990455B (en) * 2022-06-13 2023-10-13 成都先进金属材料产业技术研究院股份有限公司 High-strength and high-toughness stainless steel and ultrapure purification smelting method thereof
CN114990456B (en) * 2022-06-13 2023-10-13 成都先进金属材料产业技术研究院股份有限公司 High-strength and high-toughness stainless steel and control method for ultrahigh purity and high tissue uniformity of high-strength and high-toughness stainless steel

Similar Documents

Publication Publication Date Title
CN113088799A (en) Low-cost ultrapure high-strength-toughness low-carbon stainless bearing steel and preparation method thereof
CN105886933B (en) Hot work die steel with high tempering softening resistance and high toughness and manufacturing method thereof
CN109988971B (en) Method for producing ultra-grade pure high-speed tool steel
CN112281080A (en) Low alloy steel for railway vehicle brake disc and heat treatment method thereof
CN107686871B (en) Production method of non-quenched and tempered steel
CN113088623B (en) Preparation method of ultrapure G102Cr18Mo stainless bearing steel
CN113046627B (en) 345 MPa-grade weather-proof bridge steel and manufacturing method thereof
CN112359279A (en) Alloy structure steel wire rod for shaft and preparation method thereof
CN114941111A (en) Low-carbon non-quenched and tempered steel for automobile control arm and preparation method thereof
CN113881901B (en) Gear steel production method
CN111349858A (en) Fine-grained steel for track link of engineering machinery crawler and preparation method thereof
CN113136522B (en) Process for smelting titanium-containing austenitic stainless steel by argon oxygen furnace
CN113502434B (en) Aviation 30CrMnSiNi2A high-strength steel and production method thereof
CN114480987A (en) Rare earth-containing NM600 wear-resistant steel plate and preparation method thereof
CN111893382B (en) Food chain stainless steel and preparation method thereof
CN113403524A (en) Preparation method of flange material for nuclear power
CN111304532B (en) Heat-resistant austenitic stainless steel and preparation method thereof
CN108315645B (en) Wear-resistant steel and production process thereof
CN108707828B (en) A kind of super high impact toughness, high cleanliness steel for low-temperature pressure container and its production method
JPS62274052A (en) Case-hardening steel for bearing
CN114635077A (en) Super austenitic stainless steel and preparation method thereof
CN112143980A (en) Steel 27SiMn2 for industrial forks and preparation method thereof
CN115927950B (en) Carbon-nitrogen-containing high-chromium ferrite stainless steel and manufacturing method thereof
CN117604194B (en) Vacuum consumable electrode for 300M steel and Al-free deoxidizing refining method thereof
CN115110003B (en) Steel for main bearing of heading machine and production method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20210709

RJ01 Rejection of invention patent application after publication