CN115352145B - Composite steel for valve plate and manufacturing method thereof - Google Patents

Composite steel for valve plate and manufacturing method thereof Download PDF

Info

Publication number
CN115352145B
CN115352145B CN202210733127.9A CN202210733127A CN115352145B CN 115352145 B CN115352145 B CN 115352145B CN 202210733127 A CN202210733127 A CN 202210733127A CN 115352145 B CN115352145 B CN 115352145B
Authority
CN
China
Prior art keywords
steel
composite
valve plate
damping
martensitic stainless
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.)
Active
Application number
CN202210733127.9A
Other languages
Chinese (zh)
Other versions
CN115352145A (en
Inventor
秦斌
梁小伟
贾楠
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.)
Zhejiang Hummingbird New Material Co ltd
Original Assignee
Zhejiang Hummingbird New Material 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 Zhejiang Hummingbird New Material Co ltd filed Critical Zhejiang Hummingbird New Material Co ltd
Priority to CN202210733127.9A priority Critical patent/CN115352145B/en
Publication of CN115352145A publication Critical patent/CN115352145A/en
Application granted granted Critical
Publication of CN115352145B publication Critical patent/CN115352145B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/011—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of iron alloys or steels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B47/00—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
    • 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
    • C21D1/26—Methods of annealing
    • C21D1/32—Soft annealing, e.g. spheroidising
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0268—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment between cold rolling steps
    • 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
    • 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/10—Adaptations or arrangements of distribution members
    • F04B39/102—Adaptations or arrangements of distribution members the members being disc valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
    • B21B2001/386—Plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/004—Dispersions; Precipitations
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite
    • 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
    • Y02P10/20—Recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

The invention discloses a composite steel for valve plates, which has a three-layer structure, wherein the surfaces of two sides are made of high-strength martensitic stainless steel, and the middle is made of damping materials; the high-strength martensitic stainless steel comprises the following components in mass percent: 0.40 to 0.55 percent of Si: less than or equal to 0.60 percent, mn: less than or equal to 0.80 percent, S: less than or equal to 0.005, P: less than or equal to 0.025 percent, cr:12.5 to 14.0 percent of Mo: less than or equal to 1.50 percent, and the balance of Fe and unavoidable impurity elements; the damping material is Fe-13% Cr alloy. After the heat treatment, the tensile strength of the composite steel for the valve plate with the damping function reaches 1720-1880 MPa; the elongation is more than or equal to 5 percent, and the specific damping S.D.C value is more than or equal to 20 percent; not only has various performances of the conventional valve plate steel, but also has a damping function.

Description

Composite steel for valve plate and manufacturing method thereof
Technical Field
The invention relates to composite steel for valve plates and the technical field of preparation thereof, in particular to composite steel with damping function for valve plates and a manufacturing method thereof.
Background
Compressors have found wide application in various industries, such as air conditioning and refrigerator products, fully-enclosed, semi-enclosed piston compressors for cold chains, automotive air conditioning compressors and brake system air compressors for heavy trucks, industrial piston reciprocating compressors and oil-free compressors for medical ventilators, and various vacuum pumps. The compressor is called the heart of home appliances and automobiles, and the valve sheet as the suction and discharge gas of the compressor is visually called a heart valve. The service life of the valve plate material is very high, at least as long as the design of equipment, and some of the valve plate material is even 30 years, so that the valve plate material has high performance requirements, high strength, high hardness, high wear resistance, high fatigue, high corrosion resistance, wide working temperature and the like. The valve sheet steel mainly comprises two major types of carbon steel and stainless steel, wherein a high-strength martensitic stainless steel valve sheet is mainly used for compressors with higher requirements, and can meet the use requirements of steel for valve sheets, namely the tensile strength reaches 1720-1880 MPa, and the elongation is more than or equal to 5%.
With the increasing demands of use, attention is increasingly paid to vibrations during operation of the compressor, which may cause noise, and harmful vibrations may lead to a decrease in fatigue properties of the material, which may cause the compressor to fail in a short period of time. One of the main sources of vibration of the compressor is generated by high-frequency impact between the valve plate and the valve plate in the suction and exhaust processes. The stainless steel for valve plates which are circulated in the market at present does not have the functions of vibration reduction and noise reduction.
There are three methods of reducing vibration noise, system damping, structural damping and material damping, and for compressor air valves, valve plate material damping is a fast and efficient method. The valve plate is made of high damping alloy, so that vibration and noise are reduced, propagation of the valve plate is hindered, resonance peak stress is reduced, and the like. Because of a large amount of internal consumption of the alloy, free vibration of the structure can be quickly attenuated, and pulse stress can be obviously reduced and dissipated, so that the effects of vibration reduction and noise reduction are achieved. This internal consumption of energy is generally characterized by a specific damping (attenuation coefficient) s.d.c, a material with a value of s.d.c. exceeding 20% being referred to as a high damping material. The damping characteristics and mechanical properties of some metal materials at room temperature are shown in Table 1, wherein Fe-13% Cr alloy is a good damping material, the S.D.C. value of the Fe-13% Cr alloy is as high as 80%, but the tensile strength of the Fe-13% Cr alloy is only about 426MPa, and the performance requirements of stainless steel valve sheet steel are obviously not met. The S.D.C. value of the martensitic stainless steel in the annealed state is about 8%, and the damping property is poor; the tensile strength is about 640MPa, and the performance requirement of the stainless steel valve sheet steel can not be met. Other ferritic and austenitic stainless steels have properties similar to those of annealed martensite, have poor damping properties and have insufficient tensile strength. The conventional stainless steel for the valve plate is martensitic stainless steel after heat treatment, and the tensile strength and the elongation rate of the stainless steel meet the requirements of the valve plate steel, but the S.D.C. value is only about 5%.
Obviously, it is difficult to find a stainless steel for valve plates with damping function at present.
Based on the above situation, the invention provides a composite steel for a valve plate with a damping function and a manufacturing method thereof, which can effectively solve the problems.
Disclosure of Invention
The invention aims to provide composite steel for a valve plate and a manufacturing method thereof. The invention adopts the common high-strength martensitic stainless steel and damping material to be compounded, and the high-strength martensitic stainless steel is arranged at the two sides, so that the high-strength martensitic stainless steel has the advantages of high strength, high hardness, high wear resistance, high fatigue and high corrosion resistance; the center is made of damping material, has good damping performance and extensibility, and after the two materials are compounded, the new material has various performances of the conventional valve plate steel and has a damping function. The tensile strength of the new material reaches 1720-1880 MPa, the elongation is more than or equal to 5%, and the specific damping S.D.C. value is more than or equal to 20%.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the composite steel for the valve plate has a three-layer structure, wherein the surfaces of two sides are made of high-strength martensitic stainless steel, and the middle is made of damping materials;
the high-strength martensitic stainless steel is symmetrically distributed on the two side surfaces of the damping material.
The composition of the components of the high-strength martensitic stainless steel is contained in mass%,
C：0.40～0.55％、
Si：≤0.60％、
Mn：≤0.80％、
S：≤0.005、
P：≤0.025、
Cr：12.5～14.0％、
Mo：≤1.50％，
the balance of Fe and unavoidable impurity elements;
the damping material is Fe-13% Cr alloy.
The Fe-13% Cr alloy refers to an "Fe-Cr alloy having a Cr content of 13 wt.%.
The damping material accounts for 10-15% of the thickness of the composite steel (composite material) for the valve plate.
The composite steel for the valve plate is prepared by compositing common high-strength martensitic stainless steel with damping materials, wherein the high-strength martensitic stainless steel is arranged on two sides of the composite steel, and the composite steel has the advantages of high strength, high hardness, high wear resistance, high fatigue and high corrosion resistance; the center is made of damping materials, the damping materials have good damping performance and extensibility, and after the two materials are compounded, the tensile strength of the composite steel for the valve plate with the damping function reaches 1720-1880 MPa after the composite steel for the valve plate with the damping function is subjected to heat treatment; the elongation is more than or equal to 5 percent, and the specific damping S.D.C value is more than or equal to 20 percent; not only has various performances of the conventional valve plate steel, but also has a damping function.
The valve plate made of the composite steel material can effectively prolong the service life of compressors of air conditioners, refrigerators, cold chain refrigeration systems and the like, reduce failure rate, reduce vibration and noise levels and improve comfort; the reliability of the air compressor for the braking system of heavy trucks, high-speed rails and the like can be effectively improved, and the safety performance is improved. Meanwhile, the method has a large application prospect in occasions needing vibration reduction and noise reduction.
The invention also provides a manufacturing method of the composite steel for the valve plate, which comprises the following steps:
A. selecting a steel slab which meets the composition requirements of the high-strength martensitic stainless steel components;
B. compounding the high-strength martensitic stainless steel and a damping material into a blank, wherein the high-strength martensitic stainless steel is symmetrically compounded on two sides of the damping material to obtain a composite blank:
preferably, in the step B, the interface to be compounded is processed to be flat and smooth by a milling and grinding method before compounding, the metallic color is fully exposed, then the interface is cleaned by acetone or alcohol, and the side face of the compounded composite blank is sealed by a welding method.
Thus, no air enters during subsequent heating to oxidize the composite interface.
C. Hot rolling the composite blank into a coiled tape: heating the composite blank to 1150-1230 ℃, then preserving heat until the internal temperature and the external temperature of the composite blank are uniform and consistent, and then rolling into a hot rolled steel coil by hot rolling equipment to obtain a composite steel coil; the reduction ratio of hot rolling is more than 4:1, a step of;
if the thickness after hot rolling is 4mm, the thickness of the composite blank before hot rolling is not less than 16mm, the steel strip after hot rolling is a composite steel coil, and the composite interface is metallurgical bonding and cannot crack.
Preferably, in the step C, the composite blank is heated to 1150-1230 ℃ by adopting an electric furnace or an atmosphere furnace.
Preferably, in the step C, the heating rate of the composite blank is 3-5 ℃/min.
D. C, performing spheroidizing annealing on the composite steel coil obtained by hot rolling in the step C, wherein the spheroidizing annealing temperature is 800-850 ℃;
the steel strip after spheroidizing annealing is soft, has good plasticity and is convenient for subsequent processing.
E. D, pickling the annealed composite steel coil;
preferably, in the step E, the pickling process is performed according to high-strength martensitic stainless steel.
The surface of the steel strip after pickling has no oxide skin, and cold rolling processing can be performed.
F. Cold rolling the composite steel coil subjected to acid washing in the step E into a steel belt for a proper valve plate;
preferably, the intermediate annealing is performed at least once (one or more times) from the hot-rolled annealed pickled coil to a suitable thickness, i.e. between step C and step F, or between repeated steps F, the temperature of the intermediate annealing being in the range 750-800 ℃.
Preferably, in the step F, the thickness of the steel strip is 0.15 mm-1.20 mm.
G. B, trimming the steel strip subjected to cold rolling in the step F to obtain a steel strip for the valve plate;
and trimming the cold-rolled steel strip, and removing welding materials welded at the edges during the composite blank, so that the rest materials are all composite materials. This step may be omitted as needed in practical applications.
H. And C, carrying out heat treatment on the valve plate steel strip subjected to edge cutting in the step G to obtain the composite steel for the valve plate, wherein the heating temperature is 1030-1080 ℃.
The other production processes of the composite steel for the valve plate can refer to the heat treatment process of the conventional valve plate steel.
Compared with the prior art, the invention has the following advantages:
the composite steel for the valve plate is prepared by compositing common high-strength martensitic stainless steel with damping materials, wherein the high-strength martensitic stainless steel is arranged on two sides of the composite steel, and the composite steel has the advantages of high strength, high hardness, high wear resistance, high fatigue and high corrosion resistance; the center is made of damping materials, the damping materials have good damping performance and extensibility, and after the two materials are compounded, the tensile strength of the composite steel for the valve plate with the damping function reaches 1720-1880 MPa after the composite steel for the valve plate with the damping function is subjected to heat treatment; the elongation is more than or equal to 5 percent, and the specific damping S.D.C value is more than or equal to 20 percent; not only has various performances of the conventional valve plate steel, but also has a damping function.
The valve plate made of the composite steel material can effectively prolong the service life of compressors of air conditioners, refrigerators, cold chain refrigeration systems and the like, reduce failure rate, reduce vibration and noise levels and improve comfort; the reliability of the air compressor for the braking system of heavy trucks, high-speed rails and the like can be effectively improved, and the safety performance is improved. Meanwhile, the method has a large application prospect in occasions needing vibration reduction and noise reduction.
In the composite steel for valve sheet of the present invention,
1) The high-strength martensitic stainless steel is of a three-layer structure, high-strength martensitic stainless steel is symmetrically distributed on two sides, and damping materials are arranged in the center. The valve plate steel comprises the following chemical components in percentage by weight: c:0.40 to 0.55 percent, si: less than or equal to 0.60 percent, mn: less than or equal to 0.80 percent, S: less than or equal to 0.005, less than or equal to 0.025, cr:12.5 to 14.0 percent, mo: less than or equal to 1.50 percent, and the balance of Fe and unavoidable impurities. The carbon content of the martensitic stainless steel is higher than that of the common valve sheet steel, so that the tensile strength of the material after heat treatment of the component is higher than that of the conventional valve sheet steel, the tensile strength can reach more than or equal to 2000MPa, and the elongation rate can still be kept more than or equal to 3 percent. The high tensile strength can compensate the influence of the damping material with low central strength on the reduction of the tensile strength.
2) The center of the three-layer structure adopts damping material, and Fe-13% Cr alloy with the proportion of 10% -15% is added into the thickness center, so that the tensile strength of the material reaches 426MPa; the elongation percentage is 28 percent, and the specific resistance S.D.C. value is more than or equal to 80 percent. The material has lower tensile strength and higher elongation, and the addition of the material can obviously reduce the strength and increase the elongation of the compounded material, so that the proportion of the material in the composite layer is strictly regulated. When the proportion is designed to be 10-15%, the strength of the composite material can reach 1720-1880 MPa, the elongation is more than or equal to 5%, and the specific damping S.D.C. value is more than or equal to 20%. If the proportion of the damping material is too high, the strength is insufficient; if the proportion of the damping material is too low, the elongation is insufficient and the specific damping value is less than 20%.
3) And hot-rolling the three-layer structure composite blank into a coiled tape according to a hot rolling process, wherein the heating temperature is 1150-1230 ℃. The high carbon martensitic stainless steel has an all austenitic structure in the 1150-1230 deg.c range, while the Fe-13% cr alloy has an all ferritic structure at this temperature, since the solid solubility of carbon in ferrite is very low and the solid solubility in austenite is relatively high, carbides remain in austenite, thus relatively maintaining the independence of the two materials at high temperatures. Both materials have good hot workability in the range of 1150-1230 ℃, and good workability is also obtained after the two materials are combined into a blank. In addition, the three-layer symmetrical structure also causes uneven deformation of the material in the processing.
4) During spheroidizing annealing, the spheroidizing annealing temperature is 800-850 ℃. The structure of the annealed high-carbon martensitic stainless steel is converted into ferrite and spherical carbide; while the Fe-13% Cr alloy is still fully ferritic after annealing at this temperature. Thus, the material is softened and is convenient for cold rolling processing.
5) At least one (one or more) intermediate anneals are carried out between step C and step F, the intermediate anneals being carried out at a temperature of 750-800 ℃. At the temperature, the annealed material only returns to recrystallization and does not change phase, so that the material structure is uniform and fine.
6) And carrying out heat treatment on the cold-rolled composite valve plate according to a conventional valve plate steel heat treatment process, wherein the heating temperature is 1030-1080 ℃. The structure of the high-strength martensitic stainless steel can be fully austenitized at the heating temperature, so that the material is ensured to have enough strength after heat treatment; meanwhile, the uniform and fine grains are ensured, and the material has good toughness after heat treatment.
The manufacturing method of the invention has simple process and simple and convenient operation, and saves manpower and equipment cost.
Table 1 shows damping characteristics and mechanical properties at room temperature of a conventional stainless steel and a composite steel metal material for valve sheets of the present invention:
TABLE 1 damping Properties and mechanical Properties of metallic Material at Room temperature
Drawings
FIG. 1 is a schematic cross-sectional structure of a composite steel for valve sheet according to the present invention.
Wherein 1 is high-strength martensitic stainless steel, and 2 is damping material.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, preferred embodiments of the present invention will be described below with reference to specific examples, but should not be construed as limiting the present patent.
The test methods or test methods described in the following examples are all conventional methods unless otherwise specified; the reagents and materials, unless otherwise specified, are obtained from conventional commercial sources or prepared in conventional manner.
The composite steel for the valve plate has a three-layer structure, wherein the surfaces of two sides are made of high-strength martensitic stainless steel, and the middle is made of damping materials;
preferably, the high-strength martensitic stainless steel is symmetrically distributed on both side surfaces of the damping material.
The composition of the components of the high-strength martensitic stainless steel is contained in mass%,
C：0.40～0.55％、
Si：≤0.60％、
Mn：≤0.80％、
S：≤0.005、
P：≤0.025、
Cr：12.5～14.0％、
Mo：≤1.50％，
the balance of Fe and unavoidable impurity elements;
the damping material is Fe-13% Cr alloy.
Preferably, the damping material accounts for 10% -15% of the thickness of the composite steel (composite material) for the valve plate.
The invention also provides a manufacturing method of the composite steel for the valve plate, which comprises the following steps:
A. selecting a steel slab which meets the composition requirements of the high-strength martensitic stainless steel components;
B. compounding the high-strength martensitic stainless steel and a damping material into a blank, wherein the high-strength martensitic stainless steel is symmetrically compounded on two sides of the damping material to obtain a composite blank:
preferably, in the step B, the interface to be compounded is processed to be flat and smooth by a milling and grinding method before compounding, the metallic color is fully exposed, then the interface is cleaned by acetone or alcohol, and the side face of the compounded composite blank is sealed by a welding method.
C. Hot rolling the composite blank into a coiled tape: heating the composite blank to 1150-1230 ℃, then preserving heat until the internal temperature and the external temperature of the composite blank are uniform and consistent, and then rolling into a hot rolled steel coil by hot rolling equipment to obtain a composite steel coil; the reduction ratio of hot rolling is more than 4:1, a step of;
preferably, in the step C, the composite blank is heated to 1150-1230 ℃ by adopting an electric furnace or an atmosphere furnace.
Preferably, in the step C, the heating rate of the composite blank is 3-5 ℃/min.
D. C, performing spheroidizing annealing on the composite steel coil obtained by hot rolling in the step C, wherein the spheroidizing annealing temperature is 800-850 ℃;
E. d, pickling the annealed composite steel coil;
preferably, in the step E, the pickling process is performed according to high-strength martensitic stainless steel.
F. Cold rolling the composite steel coil subjected to acid washing in the step E into a steel belt for a proper valve plate;
preferably, the intermediate annealing is performed at least once (one or more times) from the hot-rolled annealed pickled coil to a suitable thickness, i.e. between step C and step F, the temperature of the intermediate annealing being in the range 750-800 ℃.
Preferably, in the step F, the thickness of the steel strip is 0.15 mm-1.20 mm.
G. B, trimming the steel strip subjected to cold rolling in the step F to obtain a steel strip for the valve plate;
H. and C, carrying out heat treatment on the valve plate steel strip subjected to edge cutting in the step G to obtain the composite steel for the valve plate, wherein the heating temperature is 1030-1080 ℃.
Examples:
the main chemical compositions of the high strength martensitic stainless steels of comparative examples 1 to 3 and examples 1 to 5 are shown in Table 2, wherein comparative example 1 and comparative example 2 are two high strength martensitic stainless steels without damping material added, and comparative example 1 is a stainless steel for a comparative typical valve sheet. In comparative example 3 and examples 1 to 5, damping materials are added, namely high-strength martensitic stainless steel and the damping materials are combined into a blank, wherein the high-strength martensitic stainless steel is symmetrically placed on two sides of the damping materials and rolled into a steel plate, and the thickness of the central damping material accounts for 10% -15% of the thickness of the composite blank. The key production process parameters of comparative examples 1 to 3 and examples 1 to 5 are listed in table 2, together with the thickness ratio of the damping material in the composite steel.
The heating temperatures under typical heat treatment conditions of comparative examples 1 to 3 and examples 1 to 5, and the mechanical properties and s.d.c. values of the heat treated composite steels are shown in table 3, wherein the test method of s.d.c. values is referred to GB/T18258-2000. As shown in the table, comparative example 1 is a typical stainless steel for valve plates, and after heat treatment, the tensile strength is 1820MPa, the elongation is 6.3%, the use requirement of the conventional valve plates can be completely met, but the damping effect is only about 5% as other high-strength martensite, and the high damping performance is not achieved.
Also comparative example 2 is a high strength martensitic stainless steel having a higher carbon content than comparative example 1. Under the same conditions, the tensile strength of comparative example 2 is higher than that of comparative example 1, and the elongation is slightly lower, and the high damping performance is not possessed. The material is used for combining the composite steel with the damping material, the high strength of the composite steel just compensates for the low strength of the damping strength, and the low elongation can be solved by the damping material.
In the comparative example 3, high-strength martensitic stainless steel in the comparative example 1 is combined with damping materials, and the tensile strength after heat treatment is lower than the valve plate by more than or equal to 1720 MPa; the elongation is improved from about 6% to about 8% of the conventional valve plate steel, so that the addition of the high-ductility damping material is beneficial to improving the elongation; the addition of damping material brought the specific damping s.d.c. value of comparative example 3 to 23% already belonging to the high damping material.
The composite steel is adopted in the examples 1-5, the high-strength martensitic stainless steel is symmetrically distributed on both sides of the material, the damping material Fe-13% Cr alloy is adopted in the middle, and the thickness ratio is 10-15%. The chemical components of the high-carbon martensitic stainless steel and the production process conditions of the composite steel are shown in tables 2 and 3. As can be seen from Table 3, the tensile strength 1720 to 1880MPa of the composite steel manufactured according to the design requirements; the elongation rate is more than or equal to 5 percent, and the specific damping S.D.C value is more than or equal to 20 percent, meets the use requirement of valve plate steel and has the anti-vibration damping function. The specific properties of the composite materials can be changed along with the change of carbon content and the change of heat treatment process parameters, and the requirements can be met under the process conditions designed by the invention. Even if some performance tends to be exceeded during the process, it can be improved by adjusting the heat treatment process. Therefore, the composite steel can completely meet the mechanical property and vibration resistance and damping requirements of the valve plate.
TABLE 2 Main chemical Components and key Process parameters of high strength martensitic stainless steels in comparative examples 1-3 and examples 1-5
TABLE 3 mechanical properties and S.D.C. values of composite steels after heat treatment at heating temperatures under typical heat treatment conditions of comparative examples 1 to 3 and examples 1 to 5
Number plate Heat treatment heating temperature (DEG C) Tensile strength Rm (MPa) Elongation A (%) S.D.C. value (%)
Comparative example 1 1030 1820 6.3 5
Comparative example 2 1030 2015 4.8 4
Comparative example 3 1030 1670 8.2 23
Example 1 1030 1840 7.8 26
Example 2 1030 1845 5.6 23
Example 3 1080 1770 7.9 36
Example 4 1030 1845 5.8 30
Example 5 1030 1852 6.1 31
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the invention, and the scope of the invention should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.

Claims (7)

1. The composite steel for the valve plate has a three-layer structure, wherein the surfaces of two sides are made of high-strength martensitic stainless steel, and the middle is made of damping materials;
the composition of the components of the high-strength martensitic stainless steel is contained in mass%,
C：0.40～0.55%、
Si：≤0.60%、
Mn：≤0.80%、
S：≤0.005、
P：≤0.025、
Cr：12.5～14.0%、
Mo：≤1.50%，
the balance of Fe and unavoidable impurity elements;
the damping material is Fe-13% Cr alloy;
the damping material accounts for 10-15% of the thickness of the composite steel for the valve plate;
the manufacturing method of the composite steel for the valve plate comprises the following steps:
A. selecting a steel slab which meets the composition requirements of the high-strength martensitic stainless steel components;
B. compounding the high-strength martensitic stainless steel and a damping material into a blank, wherein the high-strength martensitic stainless steel is symmetrically compounded on two sides of the damping material to obtain a composite blank:
C. hot rolling the composite blank into a coiled tape: heating the composite blank to 1150-1230 ℃, then preserving heat until the internal temperature and the external temperature of the composite blank are uniform and consistent, and then rolling into a hot rolled steel coil by hot rolling equipment to obtain a composite steel coil; the reduction ratio of hot rolling is more than 4:1, a step of;
D. c, performing spheroidizing annealing on the composite steel coil obtained by hot rolling in the step C, wherein the spheroidizing annealing temperature is 800-850 ℃;
E. d, pickling the annealed composite steel coil;
F. cold rolling the composite steel coil subjected to acid washing in the step E into a steel belt for a proper valve plate;
G. b, trimming the steel strip subjected to cold rolling in the step F to obtain a steel strip for the valve plate;
and C, carrying out heat treatment on the valve plate steel strip subjected to edge cutting in the step G to obtain the composite steel for the valve plate, wherein the heating temperature is 1030-1080 ℃.
2. The composite steel for valve sheets according to claim 1, wherein in step B, the interface to be compounded is flattened and smoothed by milling and grinding before compounding, and metallic colors are fully exposed, and then the composite steel is cleaned by acetone or alcohol, and the side surfaces of the compounded composite blank are closed by welding.
3. The composite steel for valve sheets according to claim 1, wherein in step C, the composite billet is heated to 1150-1230 ℃ using an electric furnace or an atmosphere furnace.
4. The composite steel for valve sheets according to claim 1, wherein in step C, the heating rate of the composite billet is 3 to 5 ℃/min.
5. The composite steel for valve sheets according to claim 1, wherein in step E, the pickling process is performed as a high strength martensitic stainless steel.
6. The composite steel for valve sheets according to claim 1, wherein at least one intermediate annealing is performed from the hot-rolled annealed pickled coil to a suitable thickness, i.e. between step C and step F, the temperature of the intermediate annealing being 750-800 ℃.
7. The composite steel for valve sheets according to claim 1, wherein in the step F, the thickness of the steel strip is 0.15mm to 1.20mm.
CN202210733127.9A 2022-06-27 2022-06-27 Composite steel for valve plate and manufacturing method thereof Active CN115352145B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210733127.9A CN115352145B (en) 2022-06-27 2022-06-27 Composite steel for valve plate and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210733127.9A CN115352145B (en) 2022-06-27 2022-06-27 Composite steel for valve plate and manufacturing method thereof

Publications (2)

Publication Number Publication Date
CN115352145A CN115352145A (en) 2022-11-18
CN115352145B true CN115352145B (en) 2023-08-01

Family

ID=84030313

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210733127.9A Active CN115352145B (en) 2022-06-27 2022-06-27 Composite steel for valve plate and manufacturing method thereof

Country Status (1)

Country Link
CN (1) CN115352145B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111118402A (en) * 2020-02-29 2020-05-08 上海材料研究所 Low-strength elastic-plastic damping steel plate and manufacturing method and application thereof
CN111235370A (en) * 2020-02-29 2020-06-05 上海材料研究所 Laminated composite elastic-plastic damping steel plate and manufacturing method and application thereof
CN111319321A (en) * 2020-02-29 2020-06-23 上海材料研究所 Layered composite damping steel plate with enhanced low-cycle fatigue performance and manufacturing method thereof
WO2021259278A1 (en) * 2020-06-24 2021-12-30 宝山钢铁股份有限公司 Multi-layer composite cold-rolled steel plate and manufacturing method therefor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2050532B1 (en) * 2006-07-27 2016-06-15 The University of Tokyo Multilayer steel and method for producing multilayer steel
KR101128942B1 (en) * 2008-12-24 2012-03-27 주식회사 포스코 Fine spheroidal graphite steel sheet with excellent heat treatmentability and manufacturing method thereof
CN105483701B (en) * 2015-12-10 2018-04-13 西南交通大学 Prepare the method, equipment and Structural Damping Composite of multilayer materials
CN111235371B (en) * 2020-02-29 2021-07-27 上海材料研究所 Elastic-plastic damping steel plate with layered composite structure and manufacturing method and application thereof
CN114196875B (en) * 2021-09-25 2022-10-28 浙江吉森金属科技有限公司 Stainless steel for valve plate and heat treatment method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111118402A (en) * 2020-02-29 2020-05-08 上海材料研究所 Low-strength elastic-plastic damping steel plate and manufacturing method and application thereof
CN111235370A (en) * 2020-02-29 2020-06-05 上海材料研究所 Laminated composite elastic-plastic damping steel plate and manufacturing method and application thereof
CN111319321A (en) * 2020-02-29 2020-06-23 上海材料研究所 Layered composite damping steel plate with enhanced low-cycle fatigue performance and manufacturing method thereof
WO2021259278A1 (en) * 2020-06-24 2021-12-30 宝山钢铁股份有限公司 Multi-layer composite cold-rolled steel plate and manufacturing method therefor

Also Published As

Publication number Publication date
CN115352145A (en) 2022-11-18

Similar Documents

Publication Publication Date Title
TWI429759B (en) High strength galvanized steel sheet having excellent formability and crashworthiness and method for manufacturing the same
JP2867626B2 (en) Leaf spring hose band and method of manufacturing the same
CN108138279B (en) High-strength resistance-welded steel pipe for hollow stabilizer, method for producing high-strength resistance-welded steel pipe for hollow stabilizer, high-strength hollow stabilizer, and method for producing high-strength hollow stabilizer
JPH07278758A (en) Stainless steel for engine gasket and its production
CN108977726B (en) Delayed-cracking-resistant martensite ultrahigh-strength cold-rolled steel strip and manufacturing method thereof
TW201531573A (en) Ferritic stainless steel and method for producing same
JP2021038458A (en) Non-oriented electromagnetic steel sheet and method for producing the same
CN115352145B (en) Composite steel for valve plate and manufacturing method thereof
EP2036994A1 (en) Cr-CONTAINING STEEL EXCELLENT IN THERMAL FATIGUE CHARACTERISTICS
CN111020381B (en) Austenitic stainless steel and preparation method thereof
JP3550886B2 (en) Manufacturing method of gear steel for induction hardening excellent in machinability and fatigue strength
WO2002101099A1 (en) High tensile hot-rolled steel sheet excellent in resistance to scuff on mold and in fatigue characteristics
CN114836696B (en) 390 MPa-level steel for automobile axle housing for hot stamping and production method thereof
CN110819900A (en) Steel with excellent corrosion resistance for high-strength elastic snap ring and heat treatment method thereof
EP3020841A1 (en) Coil spring, and method for manufacturing same
CN115323262B (en) Composite steel for valve plate and manufacturing method thereof
CN113811625B (en) Resistance welded steel pipe for hollow stabilizer
CN111118411B (en) High-strength stainless steel and manufacturing method thereof
JPS6134116A (en) Manufacture of high toughness hot rolled coil
CN114807551A (en) Preparation method of austenitic stainless steel cold-deformed plate
JPS6144159A (en) Steel for cold forging having superior suitability to carbonitriding
JP4393344B2 (en) Manufacturing method of case hardening steel with excellent cold workability and grain coarsening resistance
JP3371952B2 (en) Manufacturing method of soft high carbon steel sheet for processing that can omit pickling process
JP2003073783A (en) Precipitation-hardening type martensitic stainless steel sheet for flapper valve, and manufacturing method therefor
JP3872364B2 (en) Manufacturing method of oil tempered wire for cold forming coil spring

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
GR01 Patent grant
GR01 Patent grant
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of invention: A composite steel for valve discs and its manufacturing method

Effective date of registration: 20231116

Granted publication date: 20230801

Pledgee: Zhejiang Jiashan rural commercial bank Limited by Share Ltd. science and technology sub branch

Pledgor: Zhejiang hummingbird New Material Co.,Ltd.

Registration number: Y2023330002682

PE01 Entry into force of the registration of the contract for pledge of patent right