CN110682065A - Method for processing high-temperature-resistant ring piece for steam turbine - Google Patents

Method for processing high-temperature-resistant ring piece for steam turbine Download PDF

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Publication number
CN110682065A
CN110682065A CN201911073741.1A CN201911073741A CN110682065A CN 110682065 A CN110682065 A CN 110682065A CN 201911073741 A CN201911073741 A CN 201911073741A CN 110682065 A CN110682065 A CN 110682065A
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less
percent
equal
forging
temperature
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CN201911073741.1A
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Chinese (zh)
Inventor
承立新
沈忠协
顾明浩
赵周力
吴斌
卞磊
何中波
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JIANGYIN HENGRUN HEAVY INDUSTRY Co Ltd
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JIANGYIN HENGRUN HEAVY INDUSTRY Co Ltd
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Priority to CN201911073741.1A priority Critical patent/CN110682065A/en
Publication of CN110682065A publication Critical patent/CN110682065A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/36—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases using ionised gases, e.g. ionitriding
    • C23C8/38—Treatment of ferrous surfaces

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The invention discloses a processing method of a high-temperature resistant ring piece for a steam turbine, which comprises the following steps: the blank is smelted by an electric furnace and comprises the following chemical components in percentage by mass: carbon: 0.20-0.25%, manganese: 1.20-1.50%, chromium: 12.00-14.0%, nickel: 0.30-0.80%, phosphorus is less than or equal to 0.025%, sulfur is less than or equal to 0.015%, silicon: 0.20-0.50%, molybdenum: 0.9-1.25%, vanadium: 0.20-0.30%, rhenium: 0.05 to 1.3 percent of tin, less than or equal to 0.02 percent of tin, less than or equal to 0.025 percent of aluminum, less than or equal to 0.15 percent of copper, 0.15 to 0.20 percent of cobalt, less than or equal to 0.025 percent of titanium, and the balance of Fe and inevitable impurities, and rhenium is used for replacing the original tungsten, thereby not only ensuring the high temperature resistance, but also improving the hardness and the corrosion and wear resistance effects, and reducing the contents of C and nickel.

Description

Method for processing high-temperature-resistant ring piece for steam turbine
Technical Field
The invention relates to a processing method of a high-temperature resistant ring piece for a steam turbine.
Background
The high-temperature-resistant forging for the steam turbine in the prior art mainly comprises the following components: 0.18-0.24%, Si: 0.10-0.50%, Mn: 0.30-0.80%, P: less than or equal to 0.025%, S: less than or equal to 0.020%, Cr: 11.00-12.5%, Mo: 0.80-1.20%, Ni: 0.30-0.80%, V: 0.25-0.35 percent of W and less than or equal to 0.60 percent of W, the existing components can not meet the mechanical properties of the product in three directions, and the existing high-temperature resistant forged piece for the steam turbine is high in high-temperature hardness and poor in forgeability. The forging temperature range is small 1150-950 ℃, and the forging is easy to crack.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a method for processing a high-temperature resistant ring piece for a steam turbine.
In order to achieve the purpose, the technical scheme of the invention is to design a processing method of a high-temperature resistant ring piece for a steam turbine, which comprises the following steps:
s1: the blank is smelted by an electric furnace and comprises the following chemical components in percentage by mass: carbon: 0.20-0.25%, manganese: 1.20-1.50%, chromium: 12.00-14.0%, nickel: 0.30-0.80%, phosphorus is less than or equal to 0.025%, sulfur is less than or equal to 0.015%, silicon: 0.20-0.50%, molybdenum: 0.9-1.25%, vanadium: 0.20-0.30%, rhenium: 0.05 to 1.3 percent of tin, less than or equal to 0.02 percent of aluminum, less than or equal to 0.025 percent of aluminum, less than or equal to 0.15 percent of copper, 0.15 to 0.20 percent of cobalt, less than or equal to 0.025 percent of titanium, and the balance of Fe and inevitable impurities;
s2: heating before forging, namely putting the blank into a natural gas heating furnace for heating, wherein the furnace temperature is less than 500 ℃, heating to 850 ℃ along with the furnace, preserving heat for 2 hours, then heating to 1240 ℃, preserving heat for 2 hours, cooling to 1200 ℃, preserving heat for 1 hour, discharging from the furnace and starting forging;
s3: forging, namely adopting a free forging and ring rolling mode, wherein the initial forging temperature is 1180 ℃, the final forging temperature is 880 ℃, three-drawing two-pier operation is adopted, and the forging ratio is more than 4;
s4: ring rolling, wherein the forging ratio of the ring rolling is 13-15, and air cooling is performed after the ring rolling is finished;
s5: annealing after forging, namely firstly heating to 720 ℃, preserving heat and then cooling in a furnace;
s6: quenching and tempering: normalizing and tempering are carried out, wherein the normalizing temperature reaches 1040 +/-10 ℃, and oil cooling is carried out after heat preservation; when in tempering, the tempering temperature is 680 +/-10 ℃, and the air cooling is carried out after heat preservation;
s7: rough machining until the requirements of flaw detection are met;
s8: carrying out ultrasonic nondestructive testing;
s9: fine processing;
s10: and packaging and warehousing after plasma nitriding treatment.
The invention has the advantages and beneficial effects that: rhenium is used for replacing the original tungsten, so that the high temperature resistance is ensured, the hardness degree is improved, the corrosion resistance and the wear resistance are improved, and the content of C and nickel can be reduced. These nitrides have high hardness, thermal stability and high dispersivity, so that the nitrided steel parts can have high surface hardness, wear resistance, fatigue strength, seizure resistance, atmospheric and superheated steam corrosion resistance, temper softening resistance and reduced notch sensitivity.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
A method for processing a high-temperature resistant ring piece for a steam turbine is disclosed, and S1: the blank is smelted by an electric furnace and comprises the following chemical components in percentage by mass: carbon: 0.20-0.25%, manganese: 1.20-1.50%, chromium: 12.00-14.0%, nickel: 0.30-0.80%, phosphorus is less than or equal to 0.025%, sulfur is less than or equal to 0.015%, silicon: 0.20-0.50%, molybdenum: 0.9-1.25%, vanadium: 0.20-0.30%, rhenium: 0.05 to 1.3 percent of tin, less than or equal to 0.02 percent of aluminum, less than or equal to 0.025 percent of aluminum, less than or equal to 0.15 percent of copper, 0.15 to 0.20 percent of cobalt, less than or equal to 0.025 percent of titanium, and the balance of Fe and inevitable impurities;
s2: heating before forging, namely putting the blank into a natural gas heating furnace for heating, wherein the furnace temperature is less than 500 ℃, heating to 850 ℃ along with the furnace, preserving heat for 2 hours, then heating to 1240 ℃, preserving heat for 2 hours, cooling to 1200 ℃, preserving heat for 1 hour, discharging from the furnace and starting forging;
s3: forging, namely adopting a free forging and ring rolling mode, wherein the initial forging temperature is 1180 ℃, the final forging temperature is 880 ℃, three-drawing two-pier operation is adopted, and the forging ratio is more than 4;
s4: ring rolling, wherein the forging ratio of the ring rolling is 13-15, and air cooling is performed after the ring rolling is finished;
s5: annealing after forging, namely firstly heating to 720 ℃, preserving heat and then cooling in a furnace;
s6: quenching and tempering: normalizing and tempering are carried out, wherein the normalizing temperature reaches 1040 +/-10 ℃, and oil cooling is carried out after heat preservation; when in tempering, the tempering temperature is 680 +/-10 ℃, and the air cooling is carried out after heat preservation;
s7: rough machining until the requirements of flaw detection are met;
s8: carrying out ultrasonic nondestructive testing;
s9: fine processing;
s10: and packaging and warehousing after plasma nitriding treatment.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (1)

1. A processing method of a high-temperature resistant ring piece for a steam turbine is characterized by comprising the following steps:
s1: the blank is smelted by an electric furnace and comprises the following chemical components in percentage by mass: carbon: 0.20-0.25%, manganese: 1.20-1.50%, chromium: 12.00-14.0%, nickel: 0.30-0.80%, phosphorus is less than or equal to 0.025%, sulfur is less than or equal to 0.015%, silicon: 0.20-0.50%, molybdenum: 0.9-1.25%, vanadium: 0.20-0.30%, rhenium: 0.05 to 1.3 percent of tin, less than or equal to 0.02 percent of aluminum, less than or equal to 0.025 percent of aluminum, less than or equal to 0.15 percent of copper, 0.15 to 0.20 percent of cobalt, less than or equal to 0.025 percent of titanium, and the balance of Fe and inevitable impurities;
s2: heating before forging, namely putting the blank into a natural gas heating furnace for heating, wherein the furnace temperature is less than 500 ℃, heating to 850 ℃ along with the furnace, preserving heat for 2 hours, then heating to 1240 ℃, preserving heat for 2 hours, cooling to 1200 ℃, preserving heat for 1 hour, discharging from the furnace and starting forging;
s3: forging, namely adopting a free forging and ring rolling mode, wherein the initial forging temperature is 1180 ℃, the final forging temperature is 880 ℃, three-drawing two-pier operation is adopted, and the forging ratio is more than 4;
s4: ring rolling, wherein the forging ratio of the ring rolling is 13-15, and air cooling is performed after the ring rolling is finished;
s5: annealing after forging, namely firstly heating to 720 ℃, preserving heat and then cooling in a furnace;
s6: quenching and tempering: normalizing and tempering are carried out, wherein the normalizing temperature reaches 1040 +/-10 ℃, and oil cooling is carried out after heat preservation; when in tempering, the tempering temperature is 680 +/-10 ℃, and the air cooling is carried out after heat preservation;
s7: rough machining until the requirements of flaw detection are met;
s8: carrying out ultrasonic nondestructive testing;
s9: fine processing;
s10: and packaging and warehousing after plasma nitriding treatment.
CN201911073741.1A 2019-11-06 2019-11-06 Method for processing high-temperature-resistant ring piece for steam turbine Pending CN110682065A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112853079A (en) * 2020-12-31 2021-05-28 无锡派克新材料科技股份有限公司 Large-diameter thin-wall high-cylinder ultrahigh-strength steel D406A ring forging forming method
CN113444983A (en) * 2021-06-10 2021-09-28 江阴市万众精密机械有限公司 Corrosion-resistant and weather-resistant gear ring for gear box coupling and preparation method thereof

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CN105983818A (en) * 2015-01-30 2016-10-05 重庆沁煌机械制造有限公司 Technology for machining positioning rings
CN107695266A (en) * 2017-11-15 2018-02-16 江阴方圆环锻法兰有限公司 Steam turbine high temperature resistant forging and its forging method
CN108941401A (en) * 2018-06-28 2018-12-07 江阴市恒润重工股份有限公司 The processing technology of steam turbine high-temperature-resistant high-pressure-resistant forging
EP3427858A1 (en) * 2017-07-14 2019-01-16 MTU Aero Engines GmbH Forging at high temperatures, in particular of titanium aluminides
CN110050080A (en) * 2017-11-17 2019-07-23 三菱日立电力系统株式会社 Ni base wrought alloy material and the turbine high-temperature component for using it
CN110358895A (en) * 2019-07-16 2019-10-22 江阴市恒润环锻有限公司 A kind of superhigh pressure turbine alloy ring forging and its manufacturing method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102181789A (en) * 2011-04-27 2011-09-14 四川六合锻造股份有限公司 Refractory steel material for supercritical turbine blade and preparation method thereof
CN102357633A (en) * 2011-09-27 2012-02-22 上海宏钢电站设备铸锻有限公司 Method for manufacturing nickel-based high-temperature alloy forge piece
CN103667947A (en) * 2013-11-29 2014-03-26 江阴市恒润重工股份有限公司 Nickel-free austenitizing stainless steel, manufacturing process thereof, and method for manufacturing flange by nickel-free austenitizing stainless steel
CN104328353A (en) * 2014-12-01 2015-02-04 什邡新工金属材料有限公司 Rare-earth-type 0Cr17Ni4Cu4Nb martensitic precipitation-hardening stainless steel and preparation method thereof
CN105983818A (en) * 2015-01-30 2016-10-05 重庆沁煌机械制造有限公司 Technology for machining positioning rings
CN104831160A (en) * 2015-03-26 2015-08-12 哈尔滨汽轮机厂有限责任公司 Re-containing steel material used for 630 DEG C ultra-supercritical steam turbine blades and manufacturing method thereof
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EP3427858A1 (en) * 2017-07-14 2019-01-16 MTU Aero Engines GmbH Forging at high temperatures, in particular of titanium aluminides
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CN110050080A (en) * 2017-11-17 2019-07-23 三菱日立电力系统株式会社 Ni base wrought alloy material and the turbine high-temperature component for using it
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CN110358895A (en) * 2019-07-16 2019-10-22 江阴市恒润环锻有限公司 A kind of superhigh pressure turbine alloy ring forging and its manufacturing method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112853079A (en) * 2020-12-31 2021-05-28 无锡派克新材料科技股份有限公司 Large-diameter thin-wall high-cylinder ultrahigh-strength steel D406A ring forging forming method
CN112853079B (en) * 2020-12-31 2024-02-13 无锡派克新材料科技股份有限公司 Forming method of large-diameter thin-wall high-cylinder type ultra-high strength steel D406A ring forging
CN113444983A (en) * 2021-06-10 2021-09-28 江阴市万众精密机械有限公司 Corrosion-resistant and weather-resistant gear ring for gear box coupling and preparation method thereof

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Application publication date: 20200114