CN110760763A - Forging method of steel ring forging for nuclear power equipment - Google Patents

Forging method of steel ring forging for nuclear power equipment Download PDF

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Publication number
CN110760763A
CN110760763A CN201911075834.8A CN201911075834A CN110760763A CN 110760763 A CN110760763 A CN 110760763A CN 201911075834 A CN201911075834 A CN 201911075834A CN 110760763 A CN110760763 A CN 110760763A
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Prior art keywords
forging
equal
nuclear power
power equipment
temperature
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CN201911075834.8A
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Chinese (zh)
Inventor
承天洋
唐广林
孙峰
承刚
张伟
卢迅
汪凯
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JIANGYIN HENGRUN RING FORGING CO Ltd
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JIANGYIN HENGRUN RING FORGING CO Ltd
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Priority to CN201911075834.8A priority Critical patent/CN110760763A/en
Publication of CN110760763A publication Critical patent/CN110760763A/en
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/002—Hybrid process, e.g. forging following casting
    • 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
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/40—Investigating hardness or rebound hardness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0003—Steady
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/001—Impulsive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0017—Tensile
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0076—Hardness, compressibility or resistance to crushing

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Acoustics & Sound (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

The invention discloses a forging method of a steel ring forging for nuclear power equipment, which comprises the following steps: s1: manufacturing steel ingots by electric furnace smelting and external refining; s2: forging for the first time; s3: forging for the second time; s4: preheating treatment after forging; s5: quenching; s6: tempering, S7: detecting the mechanical property of the product; s8: nondestructive testing the product according to EN 10228-3; s9: and (5) finishing after forging.

Description

Forging method of steel ring forging for nuclear power equipment
Technical Field
The invention relates to a forging method of a steel ring forging for nuclear power equipment.
Background
The metal material for the nuclear power plant usually works under the working conditions of high temperature, high pressure, strong corrosion and strong irradiation, has extremely high requirements on the material, usually meets the requirements of various properties such as nuclear performance, mechanical property, chemical property, physical property, irradiation performance, process performance, economy and the like, and meets the requirements of special standard regulations, and the materials commonly used in the industry at present are carbon steel, alloy steel, stainless steel, nickel-based alloy and the like. However, the conventional forging method is adopted to treat the materials, so that the materials are difficult to forge, as-cast metallurgical defects such as segregation, porosity, shrinkage cavity and the like remain in the forged piece in different degrees, so that the forged piece generates larger stress concentration in the heat treatment process, the forged piece is cracked in the heat treatment process or the placing process after the heat treatment is finished, or the effective service life of the parts in service is reduced due to the existence of internal stress. In addition, the radiation resistance of the material is difficult to meet the requirement of the steel for nuclear power plants. Therefore, the method is particularly important for detecting the forged products of the forged forgings of nuclear power equipment.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a forging method of a steel ring forging for nuclear power equipment.
In order to achieve the purpose, the technical scheme of the invention is to design a forging method of a steel ring forging for nuclear power equipment, which comprises the following steps:
s1: the steel ingot is manufactured by adopting electric furnace smelting and external refining, wherein the chemical components are controlled in the following mass percent: c: less than or equal to 0.06 percent; si: less than or equal to 0.75 percent; mn: less than or equal to 1.55 percent; p: less than or equal to 0.030 percent; s: less than or equal to 0.015 percent; ni: 3.5-4.8%; cr: 12.0-15.0%; mo: 0.32-0.73%; n: 0.020-0.3%, and the balance of iron and non-removable impurities;
s2: the first forging, wherein the forging initial forging temperature is 1250 ℃, the finish forging temperature is 950 ℃, and the forging ratio of the main section part of the forging is more than or equal to 3.5;
s3: forging for the second time, wherein the forging initial forging temperature is 1250 ℃, the finish forging temperature is 900 ℃, and the forging ratio of the main section part of the forging is more than or equal to 3;
s4: preheating treatment after forging, heating at an initial temperature of more than or equal to 230 ℃, heating to 850 ℃ at a heating rate of more than or equal to 60 ℃/h, and keeping the temperature for 3 hours;
s5: quenching, namely heating to 930-1060 ℃, preserving heat for 4-5 hours, then carrying out water quenching for 360 seconds by adopting water with the water temperature of 20-45 ℃, and then carrying out oil cooling;
s6: tempering, namely firstly heating to 550-650 ℃, preserving heat for 2-3 hours, and then cooling in air;
s7: detecting the mechanical property of the product, taking the average value of 3 Charpy V-shaped notch samples, wherein the mechanical property of the samples accords with the requirement
Figure DEST_PATH_IMAGE001
，
Detecting unqualified products and carrying out heat treatment again, wherein the heat treatment times are not more than two;
s8: nondestructive testing the product according to EN 10228-3;
s9: and (5) finishing after forging.
In a further improvement, the mechanical property test in step S7 includes a tensile test, an impact test and a hardness test.
The further improvement is that the mechanical property detection product in the step S7 should meet the regulation of GB/T2975 steel and steel product mechanical property test and sampling position and sample preparation.
In a further development, the tensile test is carried out in accordance with GB/T228.1.
It is further improved that the impact test is performed according to the GB/T229 specification.
In a further development, the hardness test is carried out in accordance with GB/T231.1.
The invention has the advantages and beneficial effects that: the chromium content is increased, the corrosion resistance of the forge piece is improved, the nickel content is increased, the strength and the toughness of the forge piece are effectively improved, in addition, a new mechanical property detection method is adopted after the forge piece is forged, the forge piece completely meets the requirements of nuclear power metal, and the product quality is ensured.
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.
The invention discloses a forging method of a steel ring forging for nuclear power equipment, which comprises the following steps:
s1: the steel ingot is manufactured by adopting electric furnace smelting and external refining, wherein the chemical components are controlled in the following mass percent: c: less than or equal to 0.06 percent; si: less than or equal to 0.75 percent; mn: less than or equal to 1.55 percent; p: less than or equal to 0.030 percent; s: less than or equal to 0.015 percent; ni: 3.5-4.8%; cr: 12.0-15.0%; mo: 0.32-0.73%; n: 0.020-0.3%, and the balance of iron and non-removable impurities;
s2: the first forging, wherein the forging initial forging temperature is 1250 ℃, the finish forging temperature is 950 ℃, and the forging ratio of the main section part of the forging is more than or equal to 3.5;
s3: forging for the second time, wherein the forging initial forging temperature is 1250 ℃, the finish forging temperature is 900 ℃, and the forging ratio of the main section part of the forging is more than or equal to 3;
s4: preheating treatment after forging, heating at an initial temperature of more than or equal to 230 ℃, heating to 850 ℃ at a heating rate of more than or equal to 60 ℃/h, and keeping the temperature for 3 hours;
s5: quenching, namely heating to 930-1060 ℃, preserving heat for 4-5 hours, then carrying out water quenching for 360 seconds by adopting water with the water temperature of 20-45 ℃, and then carrying out oil cooling;
s6: tempering, namely firstly heating to 550-650 ℃, preserving heat for 2-3 hours, and then cooling in air;
s7: detecting the mechanical property of the product, taking the average value of 3 Charpy V-shaped notch samples, wherein the mechanical property of the samples accords with the requirement
Figure 578405DEST_PATH_IMAGE002
，
Detecting unqualified products and carrying out heat treatment again, wherein the heat treatment times are not more than two;
s8: nondestructive testing the product according to EN 10228-3;
s9: and (5) finishing after forging.
The quenching and tempering heat preservation time is ensured to be sufficient, the time is determined according to the section size of the forged piece, the mechanical property detection is carried out after the performance heat treatment of the ring forged piece is finished, the surface processing is carried out after the mechanical property detection is finished, the flaw detection inspection requirement is met, the formal ultrasonic flaw detection is carried out, the finish machining is arranged after the flaw detection is qualified, and the surface of the forged piece is free from visible harmful defects such as cracks, interlayers, folding, slag inclusion and the like. If the defect exists, the grinding is allowed to be eliminated, but the grinding part needs to be smoothly transited, and the removal depth does not exceed 80 percent of the allowance.
The mechanical property detection in the step S7 includes a tensile test, an impact test and a hardness test. The mechanical property detection product is required to meet the regulation of GB/T2975 steel and steel product mechanical property test and sampling position and sample preparation when in sampling, the tensile test is executed according to the regulation of GB/T228.1, the impact test is executed according to the regulation of GB/T229, and the hardness test is executed according to the regulation of GB/T231.1.
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 (6)

1. A forging method of a steel ring forging for nuclear power equipment is characterized by comprising the following steps:
s1: the steel ingot is manufactured by adopting electric furnace smelting and external refining, wherein the chemical components are controlled in the following mass percent: c: less than or equal to 0.06 percent; si: less than or equal to 0.75 percent; mn: less than or equal to 1.55 percent; p: less than or equal to 0.030 percent; s: less than or equal to 0.015 percent; ni: 3.5-4.8%; cr: 12.0-15.0%; mo: 0.32-0.73%; n: 0.020-0.3%, and the balance of iron and non-removable impurities;
s2: the first forging, wherein the forging initial forging temperature is 1250 ℃, the finish forging temperature is 950 ℃, and the forging ratio of the main section part of the forging is more than or equal to 3.5;
s3: forging for the second time, wherein the forging initial forging temperature is 1250 ℃, the finish forging temperature is 900 ℃, and the forging ratio of the main section part of the forging is more than or equal to 3;
s4: preheating treatment after forging, heating at an initial temperature of more than or equal to 230 ℃, heating to 850 ℃ at a heating rate of more than or equal to 60 ℃/h, and keeping the temperature for 3 hours;
s5: quenching, namely heating to 930-1060 ℃, preserving heat for 4-5 hours, then carrying out water quenching for 360 seconds by adopting water with the water temperature of 20-45 ℃, and then carrying out oil cooling;
s6: tempering, namely firstly heating to 550-650 ℃, preserving heat for 2-3 hours, and then cooling in air;
s7: detecting the mechanical property of the product, taking the average value of 3 Charpy V-shaped notch samples, wherein the mechanical property of the samples accords with the requirement
Figure 31700DEST_PATH_IMAGE001
，
Detecting unqualified products and carrying out heat treatment again, wherein the heat treatment times are not more than two;
s8: nondestructive testing the product according to EN 10228-3;
s9: and (5) finishing after forging.
2. The forging method of the steel ring forging for nuclear power equipment as claimed in claim 1, wherein the mechanical property detection in step S7 includes a tensile test, an impact test and a hardness test.
3. The forging method of the steel ring forging for the nuclear power equipment as claimed in claim 1, wherein the mechanical property detection in the step S7 meets the regulations of GB/T2975 mechanical property test and sampling position of steel and steel products and sample preparation.
4. The forging method of the steel ring forging for nuclear power equipment as claimed in claim 2, wherein the tensile test is performed according to GB/T228.1.
5. The forging method of the steel ring forging for nuclear power equipment as claimed in claim 2, wherein the impact test is performed according to the GB/T229 specification.
6. The forging method of the steel ring forging for nuclear power equipment as claimed in claim 2, wherein the hardness test is performed according to GB/T231.1.
CN201911075834.8A 2019-11-06 2019-11-06 Forging method of steel ring forging for nuclear power equipment Pending CN110760763A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111167994A (en) * 2020-02-12 2020-05-19 山东宝鼎重工实业有限公司 Continuous forging production process for cylinder parts
CN114908226A (en) * 2022-04-01 2022-08-16 南京钢铁有限公司 Manufacturing method of hot forging forming composite quenching structure refined high-strength bolt
CN115740314A (en) * 2022-11-24 2023-03-07 南京工程学院 Anti-cracking and energy-saving forging process for high-strength large-scale forging

Citations (5)

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Publication number Priority date Publication date Assignee Title
EP0020793A1 (en) * 1979-06-08 1981-01-07 Henrik Giflo High-strength stainless steel, well suited for polishing and resistant to acids
RU2164546C2 (en) * 1999-04-12 2001-03-27 Всероссийский научно-исследовательский институт авиационных материалов High strength-corrosion resistant of austenite- martensite class
CN101886228A (en) * 2009-05-13 2010-11-17 中国科学院金属研究所 Low carbon martensite aged stainless steel with high strength high toughness and high decay resistance performances
CN107345288A (en) * 2017-06-29 2017-11-14 张家港海锅新能源装备股份有限公司 A kind of manufacture method of nuclear power generating equipment steel and its forging
CN108517471A (en) * 2018-03-29 2018-09-11 太原钢铁(集团)有限公司 Oil well corrosion-resistant super martensitic stain less steel pipe and its manufacturing method

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Publication number Priority date Publication date Assignee Title
EP0020793A1 (en) * 1979-06-08 1981-01-07 Henrik Giflo High-strength stainless steel, well suited for polishing and resistant to acids
RU2164546C2 (en) * 1999-04-12 2001-03-27 Всероссийский научно-исследовательский институт авиационных материалов High strength-corrosion resistant of austenite- martensite class
CN101886228A (en) * 2009-05-13 2010-11-17 中国科学院金属研究所 Low carbon martensite aged stainless steel with high strength high toughness and high decay resistance performances
CN107345288A (en) * 2017-06-29 2017-11-14 张家港海锅新能源装备股份有限公司 A kind of manufacture method of nuclear power generating equipment steel and its forging
CN108517471A (en) * 2018-03-29 2018-09-11 太原钢铁(集团)有限公司 Oil well corrosion-resistant super martensitic stain less steel pipe and its manufacturing method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
武光江 等: "淬火和回火工艺对00Cr13Ni5Mo钢力学和组织性能的影响", 《金属世界》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111167994A (en) * 2020-02-12 2020-05-19 山东宝鼎重工实业有限公司 Continuous forging production process for cylinder parts
CN114908226A (en) * 2022-04-01 2022-08-16 南京钢铁有限公司 Manufacturing method of hot forging forming composite quenching structure refined high-strength bolt
CN115740314A (en) * 2022-11-24 2023-03-07 南京工程学院 Anti-cracking and energy-saving forging process for high-strength large-scale forging

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