CN108315650A - A kind of martensitic stain less steel and its manufacturing method - Google Patents
A kind of martensitic stain less steel and its manufacturing method Download PDFInfo
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- CN108315650A CN108315650A CN201810294036.3A CN201810294036A CN108315650A CN 108315650 A CN108315650 A CN 108315650A CN 201810294036 A CN201810294036 A CN 201810294036A CN 108315650 A CN108315650 A CN 108315650A
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- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Abstract
The present invention provides a kind of martensitic stain less steel and its manufacturing method, the chemical elements in percentage by mass of the stainless steel is：C：0.01~0.18wt%, Si：0.4~1.5wt%, Mn：0.4~3.0wt%, P≤0.04wt%, S：0.002~0.01wt%, Cr：11.0~15.0wt%, N：0.01~0.15wt%, Nb：0.001~0.01wt%, V：0.05~0.25wt%, Ti：0.001~0.01wt%, Mo：0.01~1.50wt%, B：0.0005~0.001wt%, surplus are Fe and inevitable impurity.In addition, the present invention also provides a kind of manufacturing methods of above-mentioned martensitic stain less steel.Martensitic stain less steel of the present invention has high rigidity, high tenacity and excellent high temperature oxidation resistance simultaneously.
Description
Technical field
The present invention relates to metal material and its processing method more particularly to a kind of martensitic stain less steel and its manufacturing methods.
Background technology
Martensitic stain less steel is chrome stainless steel, is widely used in that knife is cut, measurer, turbine blade etc. are to obdurability and resistance to
Corrode the field that has certain requirements.Requirement of the user to Low Carbon Martensite Stainless Steel be have simultaneously higher hardness (30~
40HRC) and preferable toughness (Charpy v-notch ballistic work be more than 30J).Martensitic stain less steel mainly by add carbon come
Improve intensity, hardness after heat treatment.However, carbon content raising can reduce toughness, therefore high intensity and high tenacity are horse always
Two performances that family name's body steel can not get both.Since user in use will be heat-treated martensitic stain less steel, and it is high
Warm processing often makes martensitic stainless steel face generate thicker oxide layer, to the surface polishing processing of downstream user bring compared with
Big difficulty, therefore high temperature oxidation resistance is also an important indicator of martensitic stain less steel performance.
In the prior art, it is stainless to provide a kind of low-carbon martensite of brake disc by Chinese patent CN101906587A
Steel, the stainless steel is by lower carbon content (0.03-0.1wt%) and higher manganese content (1-2.5wt%) so that martensite
Stainless steel has higher intensity and toughness.However the patent using silicon as a kind of impurity element control in 0.5wt% hereinafter, this
So that the high-temperature oxidation resistance of the patented invention is poor.Chinese patent CN103255340B in order to overcome high-strength vehicle steel at
Intensity is high after shape, problem of toughness deficiency, it is proposed that a kind of the hot forming steel plate and preparation method of high-strength tenacity, by steel plate with
Hot rolling after 20-100 DEG C of speed is heated to austenitizing temperature constant temperature for a period of time, makes Austenite Grain Refinement, with 50-120
DEG C/speed of s is quenched to 50-370 DEG C, the retained austenite of part supersaturated martensite and non-phase transformation is obtained, at 200-500 DEG C
Temperature isothermal 5-600s, make carbon from martensite to retained austenite distribute with stable austenite, be finally quenched into room temperature
The heterogeneous structure for obtaining refinement martensite and retained austenite, to obtain high intensity and high-ductility steel.It is this to utilize quenching
Add the method for partition to realize heterogeneous structure, obtains high-strength, high tenacity combination method and more applied in carbon steel, such as
A kind of ingredient of steel is proposed in CN103160680A, and obtains martensite and retained austenite complex phase using quenching compounding technique
Tissue, the strength and ductility product of steel reach 30GP wt% or more；A kind of low-alloy high-strength steel is proposed in CN103243275B, passes through partition
Processing and temper have obtained bainite, martensite and austenite heterogeneous structure, have reached good strong plasticity and toughness is matched
It closes；CN103045950B also proposed a kind of low alloying low cost steel, increase hardness of steel by rapid quenching and carbon redistribution,
It ensure that good toughness.The application of the method for quenching plus partition on stainless steel is few, in the prior art,
A kind of 0.15~0.4wt% of phosphorus content is proposed in CN103614649B, nitrogen content is 0~0.12wt%, chromium 13.0~
17.0wt%, 0~5wt% of nickel, the martensitic stain less steel of molybdenum 0-2.0wt% etc. are manufactured into hot rolling slab by conventional material, add
Heat to 950~1100 DEG C heat preservation 0.5~2h, be then air-cooled to 25~200 DEG C, be then heated to 350~500 DEG C heat preservation 10~
60min is air-cooled to room temperature, introduces the retained austenite of disperse in microscopic structure by the method for quenching plus partition, substantially carries
The strong plasticity of high martensitic stain less steel is horizontal.
In conclusion existing in the prior art martensitic stain less steel high rigidity and the problem of high tenacity is can't eat one's cake and have it,
And the high-temperature oxidation resistance of martensitic stain less steel how is improved simultaneously.
Invention content
To solve the above-mentioned problems, of the invention first is designed to provide a kind of geneva with specific formulated component
Body stainless steel, which has high rigidity and high tenacity, while having excellent high-temperature oxidation resistance.
To achieve the goals above, the present invention provides a kind of martensitic stain less steel, chemical elements in percentage by mass
For：C：0.01~0.18wt%, Si：0.4~1.5wt%, Mn：0.4~3.0wt%, P≤0.04wt%, S：0.002~
0.01wt%, Cr：11.0~15.0wt%, N：0.01~0.15wt%, Nb：0.001~0.01wt%, V：0.05~
0.25wt%, Ti：0.001~0.01wt%, Mo：0.01~1.50wt%, B：0.0005~0.001wt%, surplus be Fe and
Inevitable impurity.
Optionally, chemical elements in percentage by mass is：C：0.03~0.15wt%, Si：0.53~1.25wt%,
Mn：0.45~2.45wt%, Cr：11.2~14.5wt%, N：0.01~0.08wt%, Nb：0.001~0.007wt%, V：
0.05~0.23wt%, Ti：0.002~0.008wt%, Mo：0.01~1.10wt%, B：0.0005~0.0009wt%, it is remaining
Amount is Fe and inevitable impurity.
Optionally, chemical element mass percent also meets：0.02wt%≤C+N≤0.20wt%.
Optionally, chemical element mass percent also meets：V+Ti+Nb≤0.25wt%.
Optionally, the microstructure of martensitic stain less steel is martensite and retained austenite heterogeneous structure.
Optionally, the Phase Proportion of martensite is 55~65% in microstructure, the Phase Proportion of retained austenite is 35~
45%.
Optionally, martensitic stain less steel is prepared by following steps：
(1) by steel billet or continuous casting billet, hot rolled steel plate or steel band is made in hot rolling, and anneals；
(2) by after annealing hot rolled steel plate or steel band be heated to 850~1000 DEG C heat preservation 5~30min, then to be more than
It is quickly cooled to martensite and austenite two-phase section in the speed of 30 DEG C/s, cooling termination temperature is 150~220 DEG C, is reheated
To 350~500 DEG C, it is air-cooled to room temperature, obtains martensitic stain less steel.
A kind of martensitic stain less steel provided by the invention, alloy system C-Si-Mn-Cr-N-Nb-V-Ti-Mo-B pass through
The mating reaction of its chemical composition so that the stainless steel has high rigidity, high tenacity and excellent antioxidant performance.Materialization studies
The restriction reason divided is as follows：
Carbon：It is important austenizer, certain carbon content can ensure to obtain fully austenitic structure when high temperature；It is
Ensure that the important element of hardness after being heat-treated, carbon are important solution strengthening element and precipitation strength element；It can be with gap original
The form of son is present in steel, can complete to reallocate by alternate diffusion during reheating after quenching, stable residual
Austenite structure；On the one hand excessively high carbon content increases brittleness, on the other hand also damage corrosion resistance.In order to reach expected effect
Fruit, carbon content is 0.01~0.18wt% in the present invention, and is used cooperatively with nitrogen, preferably 0.03~0.15wt%.
Nitrogen：Be austenizer as carbon, can exist in the form of interstitial atom, have solution strengthening effect, nitrogen
Solubility in austenite is higher than carbon, and the precipitate of nitrogen is less during heat treatment, while being dissolved nitrogen in the base
The corrosion resistance of stainless steel can be improved, therefore nitrogen is that one kind can improve martensitic stain less steel intensity and raising is corrosion-resistant
The element of performance, content is 0.01~0.15wt%, preferably 0.01~0.08wt% in the present invention.
Silicon：It is added in steel mainly as deoxidier, plays solution strengthening effect, in terms of improving high temperature oxidation resistance
Silicon also has apparent effect.But in steel silicone content high ductibility be deteriorated, therefore from improve stainless steel antioxygenic property and
From the aspect of not reducing machinability, content is 0.4~1.5wt%, preferably 0.53~1.25wt% in the present invention.
Manganese：Manganese is both deoxidant element and solution strengthening element, can significantly improve the intensity of steel.It is Ovshinsky additionally, due to manganese
The addition of body formation element, manganese can make martensitic stain less steel that austenite be more readily formed at high temperature, to while cooling
Obtain more martensites.But manganese content is excessively high to be unfavorable for annealing softening, and content is 0.4~3.0wt% in the present invention, excellent
It is selected as 0.45~2.45wt%.
Phosphorus：Phosphorus is harmful element, therefore reduces its content as possible according to production controlled level.
Sulphur：Sulphur is also a kind of harmful element, and the sulfide of formation not only will produce hot-short phenomenon (when steel is 1100~1200
DEG C carry out hot-working when, be distributed in the low melting point of crystal boundary eutectic fusing and cause to crack, here it is usually said sulphur
" hot-short " phenomenon) and corrosion resistance can be reduced, the content of usual sulphur is controlled in the illeffects less than 0.01wt% to avoid sulphur.
Chromium：It is to improve the corrosion proof element of stainless steel, but chromium is strong ferrite former, content Gao Shihui makes low-carbon horse
Family name's body steel austenitizing is difficult, can also cost be made to improve, and content is 11.0~15.0wt% to chromium content in the present invention, preferably
11.2~14.5wt%.
Being used cooperatively for carbon and nitrogen, in order to achieve the purpose that austenite has high rigidity (30~50HRC), high tenacity,
Ask 0.02wt%≤C+N≤0.15wt%, the excessively high excessive high hardness that can make material of total content of C and N element, degraded toughness.
Molybdenum：Molybdenum can improve quenching degree and heat resistance in steel.Quenching brittleness is prevented, and it is stainless to effectively improve martensite
Corrosion resistance of the steel in the general medium of air or water, but the increase of Mo can also increase FeCrMo phases in stainless steel simultaneously
Precipitation, influence the toughness and corrosion resistance of stainless steel, therefore, to do stringent restriction to the content of Mo, Mo contents in the present invention
For 0.01~1.50wt%, preferably 0.01~1.10wt%.
Vanadium, titanium, niobium：All it is strong carbide element, is all easily formed with interstitial element in hot-working or heat treatment process
Carbon, nitride make its atom lose the ability reallocated in alternate diffusion, therefore the present invention is preferably by the content of vanadium, titanium, niobium
Control is V+Ti+Nb≤0.25wt%.
Boron：Boron is during austenite converts, since ferrite is easiest in grain boundaries forming core, since B is adsorbed on crystalline substance
In boundary, it is filled with defect, reduces crystal boundary energy position so that cenotype nucleation is difficult, and stabilization of austenite increases, and quenches to improve
Permeability, content is 0.0005~0.001wt%, preferably 0.0005~0.0009wt% in the present invention.
In the reinforced alloys element of martensitic stain less steel, carbon and nitrogen are to improve the most effective element of intensity.Due to carbon
Addition tends to form carbon segregation during rolling and heat treatment, reduces the corrosion resistance of martensitic stain less steel, and
The addition of nitrogen is easy again so that a large amount of stomatas of stainless steel base generation, impact machine-shaping and sanding and polishing.Therefore, originally
Invention is by rationally controlling carbon, nitrogen, and by the reasonable employment of the steelmaldng impurities element such as Si, Mn, cooperation Mo, V, Nb, Ti,
The addition of the alloying elements such as B and proportioning so that the martensitic stain less steel of middle low-carbon has reached high-carbon horse in terms of intensity and hardness
The index of family name's body stainless steel, and toughness and corrosion resistance remain the characteristic of Low Carbon Martensite Stainless Steel, efficiently solve horse
Family name's body stainless steel intensity, toughness, corrosion resistance etc. are conflicting, it is difficult to matched problem.
Second object of the present invention is to provide a kind of manufacturing method of martensitic stain less steel, stainless by the martensite
The martensitic stain less steel of high rigidity, high tenacity, excellent high-temperature oxidation resistance is finally made in the manufacturing method of steel.
The present invention provides a kind of manufacturing methods of martensitic stain less steel, include the following steps：
(1) by steel billet or continuous casting billet, hot rolled steel plate or steel band is made in hot rolling, and anneals；
(2) by after annealing hot rolled steel plate or steel band be heated to 850~1000 DEG C heat preservation 5~30min, then to be more than
It is quickly cooled to martensite and austenite two-phase section in the speed of 30 DEG C/s, cooling termination temperature is 150~220 DEG C, is reheated
To 350~500 DEG C, it is air-cooled to room temperature, obtains martensitic stain less steel.
Wherein, the chemical elements in percentage by mass of the martensitic stain less steel is：C：0.01~0.18wt%, Si：0.4
~1.5wt%, Mn：0.4~3.0wt%, P≤0.04wt%, S：0.002~0.01wt%, Cr：11.0~15.0wt%, N：
0.01~0.15wt%, Nb：0.001~0.01wt%, V：0.05~0.25wt%, Ti：0.001~0.01wt%, Mo：0.01
~1.50wt%, B：0.0005~0.001wt%, surplus are Fe and inevitable impurity.
Optionally, the chemical elements in percentage by mass of martensitic stain less steel is：C：0.03~0.15wt%, Si：0.53
~1.25wt%, Mn：0.45~2.45wt%, Cr：11.2~14.5wt%, N：0.01~0.08wt%, Nb：0.001~
0.007wt%, V：0.05~0.23wt%, Ti：0.002~0.008wt%, Mo：0.01~1.10wt%, B：0.0005~
0.0009wt%, surplus are Fe and inevitable impurity.
Optionally, the chemical elements in percentage by mass of martensitic stain less steel also meets：0.02wt%≤C+N≤
0.20wt%.
Optionally, the chemical elements in percentage by mass of martensitic stain less steel also meets：V+Ti+Nb≤0.25wt%.
Optionally, the microstructure of martensitic stain less steel is martensite and retained austenite heterogeneous structure.
Optionally, the Phase Proportion of martensite is 55~65% in microstructure, the Phase Proportion of retained austenite is 35~
45%.
The steel billet of set component or Hot Charging of Continuous Casting Slab are rolled into hot rolled steel plate or steel band, and annealed, the group after annealing
It is woven to ferrite and carbide, there is lower hardness and higher ductility, is suitble to punching, shearing, calendering processing.
Steel band after annealing is heated to 850~1000 DEG C of 5~30min of heat preservation, primarily to ensureing that steel can be complete
Austenitizing, carbon, nitride are fully dissolved.
Then it is quickly cooled to martensite and austenite two-phase section to be more than or equal to the speed of 30 DEG C/s, i.e., cooled down temperature
To between Ms (martensite start) point (Ms) and finishing temperature (Mf), martensite and austenitic duplex tissue, Ms temperature are obtained
Computational methods be：Ms (DEG C)=539-430 × [C+N] -30 × [Mn] -12 × [Cr] -5.0 × [Si], wherein [C], [Si],
[Mn], [Cr], [N] are respectively the weight content of C, Si, Mn, Cr, N in martensitic stain less steel；The computational methods of Mf temperature are：
Mf (DEG C)=Ms-250.Speed to be more than or equal to 30 DEG C/s is quickly cooled down can be to avoid carbon, nitride in cooling procedure
It is precipitated.The retained austenite for introducing disperse in microscopic structure by the method for quenching plus partition, greatly improved martensite not
The strong plasticity of rust steel.
350~500 DEG C of 10~30min of heat preservation are again heated to, carbon, nitrogen interstitial atom is made to pass through diffusion from martensitic structure
Into in austenite structure, the stability for not completing the austenite structure of martensite transfor mation is set to increase, to make the steady of stainless steel
Qualitative increase.
It is air-cooled to room temperature, obtains martensite and retained austenite heterogeneous structure, while there is high rigidity and high tenacity.
A kind of manufacturing method of martensitic stain less steel provided by the invention, it is stainless by martensite made from the manufacturing method
There is steel martensite and retained austenite heterogeneous structure, the stainless steel to have high rigidity and high tenacity and excellent height simultaneously
Warm inoxidizability.
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this specification by particular specific embodiment below
Revealed content understands other advantages and effect of the present invention easily.Although description of the invention will combine preferred embodiment
It introduces together, but this feature for not representing the invention is only limitted to the embodiment.On the contrary, being invented in conjunction with embodiment
The purpose of introduction is to be possible to the other selections extended or transformation to cover the claim based on the present invention.In order to carry
Understand for the depth to the present invention, will include many concrete details in being described below.The present invention can not also use these thin
Section is implemented.In addition, in order to avoid the emphasis of the chaotic or fuzzy present invention, some details will be omitted in the de-scription.
Difference lies in chemical compositions by embodiment 1-5 and comparative example 1-3 with when technological parameter difference, refers to table 1 and table
2。
Embodiment 1
By steel billet or continuous casting billet, hot rolled steel plate or steel band is made by hot rolling, and anneal；Steel band after annealing is added
Heat is to 960 DEG C and keeps the temperature 20min, and martensite and austenite two-phase section are then quickly cooled in a manner of air-cooled, cooling to terminate
Temperature is 200 DEG C, is again heated to 350 DEG C and keeps the temperature 20min, be air-cooled to room temperature, obtains the martensitic stain less steel.Specific performance is joined
Number is referring to the embodiment 1 in table 2.As shown in table 1, the chemical elements in percentage by mass of the martensitic stain less steel is：C：
0.05wt%, Si：0.53wt%, Mn：2.45wt%, P：0.02wt%, S：0.004wt%, Cr：12.3wt%, N：
0.05wt%, Nb：0.001wt%, V：0.05wt%, Ti：0.003wt%, Mo：0.01wt%, B：0.0005wt%, surplus are
Fe and inevitable impurity.
Embodiment 2
By steel billet or continuous casting billet, hot rolled steel plate or steel band is made by hot rolling, and anneal；Steel band after annealing is added
Heat is to 920 DEG C and keeps the temperature 10min, and martensite and austenite two-phase section are then quickly cooled in a manner of air-cooled, cooling to terminate
Temperature is 175 DEG C, is again heated to 400 DEG C and keeps the temperature 10min, be air-cooled to room temperature, obtains the martensitic stain less steel.Specific performance is joined
Number is referring to the embodiment 2 in table 2.As shown in table 1, the chemical elements in percentage by mass of the martensitic stain less steel is：C：
0.08wt%, Si：0.63wt%, Mn：1.34wt%, P：0.02wt%, S：0.006wt%, Cr：11.2wt%, N：
0.07wt%, Nb：0.002wt%, V：0.07wt%, Ti：0.002wt%, Mo：0.01wt%, B：0.0006wt%, surplus are
Fe and inevitable impurity.
Embodiment 3
By steel billet or continuous casting billet, hot rolled steel plate or steel band is made by hot rolling, and anneal；Steel band after annealing is added
Heat is to 920 DEG C and keeps the temperature 5min, and martensite and austenite two-phase section are then quickly cooled in a manner of air-cooled, cooling to terminate temperature
Degree is 165 DEG C, is again heated to 400 DEG C and keeps the temperature 10min, be air-cooled to room temperature, obtains the martensitic stain less steel.Specific performance parameter
Referring to the embodiment 3 in table 2.As shown in table 1, the chemical elements in percentage by mass of the martensitic stain less steel is：C：
0.07wt%, Si：0.87wt%, Mn：1.78wt%, P：0.03wt%, S：0.002wt%, Cr：13.8wt%, N：
0.08wt%, Nb：0.005wt%, V：0.08wt%, Ti：0.005wt%, Mo：0.5wt%, B：0.0007wt%, surplus are
Fe and inevitable impurity.
Embodiment 4
By steel billet or continuous casting billet, hot rolled steel plate or steel band is made by hot rolling, and anneal；Steel band after annealing is added
Heat is to 880 DEG C and keeps the temperature 30min, and martensite and austenite two-phase section are then quickly cooled in a manner of air-cooled, cooling to terminate
Temperature is 165 DEG C, is again heated to 450 DEG C and keeps the temperature 30min, be air-cooled to room temperature, obtains the martensitic stain less steel.Specific performance is joined
Number is referring to the embodiment 4 in table 2.As shown in table 1, the chemical elements in percentage by mass of the martensitic stain less steel is：C：
0.03wt%, Si：1.25wt%, Mn：0.45wt%, P：0.02wt%, S：0.001wt%, Cr：14.5wt%, N：
0.01wt%, Nb：0.006wt%, V：0.15wt%, Ti：0.008wt%, Mo：1.1wt%, B：0.0008wt%, surplus are
Fe and inevitable impurity.
Embodiment 5
By steel billet or continuous casting billet, hot rolled steel plate or steel band is made by hot rolling, and anneal；Steel band after annealing is added
Heat is to 880 DEG C and keeps the temperature 20min, and martensite and austenite two-phase section are then quickly cooled in a manner of air-cooled, cooling to terminate
Temperature is 165 DEG C, is again heated to 500 DEG C and keeps the temperature 20min, be air-cooled to room temperature, obtains the martensitic stain less steel.Specific performance is joined
Number is referring to the embodiment 5 in table 2.As shown in table 1, the chemical elements in percentage by mass of the martensitic stain less steel is：C：
0.03wt%, Si：1.25wt%, Mn：0.45wt%, P：0.02wt%, S：0.008wt%, Cr：14.5wt%, N：
0.01wt%, Nb：0.006wt%, V：0.15wt%, Ti：0.008wt%, Mo：1.1wt%, B：0.0008wt%, surplus are
Fe and inevitable impurity.
Comparative example 1
By steel billet or continuous casting billet, hot rolled steel plate or steel band is made by hot rolling, and anneal；Steel band after annealing is added
Heat is to 920 DEG C and keeps the temperature 20min, and martensite and austenite two-phase section are then quickly cooled in a manner of air-cooled, cooling to terminate
Temperature is 25 DEG C, is again heated to 250 DEG C and keeps the temperature 30min, be air-cooled to room temperature, obtains the martensitic stain less steel.Specific performance is joined
Number is referring to the comparative example 1 in table 2.As shown in table 1, the chemical elements in percentage by mass of the martensitic stain less steel is：C：
0.13wt%, Si：1.42wt%, Mn：0.35wt%, P：0.03wt%, S：0.001wt%, Cr：11.5wt%, N：
0.03wt%, Nb：0.3wt%, V：0.01wt%, Ti：0.3wt%, Mo：0wt%, B：0.01wt%, surplus are Fe and can not
The impurity avoided.
Comparative example 2
By steel billet or continuous casting billet, hot rolled steel plate or steel band is made by hot rolling, and anneal；Steel band after annealing is added
Heat is to 880 DEG C and keeps the temperature 20min, and martensite and austenite two-phase section are then quickly cooled in a manner of air-cooled, cooling to terminate
Temperature is 165 DEG C, is again heated to 500 DEG C and keeps the temperature 20min, be air-cooled to room temperature, obtains the martensitic stain less steel.Specific performance is joined
Number is referring to the comparative example 2 in table 2.As shown in table 1, the chemical elements in percentage by mass of the martensitic stain less steel is：C：
0.15wt%, Si：1.5wt%, Mn：0.56wt%, P：0.04wt%, S：0.009wt%, Cr：12.6wt%, N：
0.04wt%, Nb：0wt%, V：0wt%, Ti：0wt%, Mo：1.1wt%, B：0wt%, surplus be Fe and inevitably it is miscellaneous
Matter.
Comparative example 3
By steel billet or continuous casting billet, hot rolled steel plate or steel band is made by hot rolling, and anneal；Steel band after annealing is added
Heat is to 980 DEG C and keeps the temperature 15min, and martensite and austenite two-phase section are then quickly cooled in a manner of air-cooled, cooling to terminate
Temperature is 25 DEG C, is again heated to 250 DEG C and keeps the temperature 20min, be air-cooled to room temperature, obtains the martensitic stain less steel.Specific performance is joined
Number is referring to the comparative example 3 in table 2.As shown in table 1, the chemical elements in percentage by mass of the martensitic stain less steel is：C：
0.05wt%, Si：0.35wt%, Mn：2.0wt%, P：0.03wt%, S：0.005wt%, Cr：13wt%, N：0.04wt%,
Nb：0.005wt%, V：0.1wt%, Ti：0.005wt%, Mo：0.7wt%, B：0.0008wt%, surplus are Fe and can not keep away
The impurity exempted from.
The present invention measures martensite and austenite two-phase in martensitic stain less steel by X-ray diffraction quantitative phase analysis
Ratio be respectively 55~65%, 35~45%.
Hot rolled steel plate or steel band are rolled into using the steel billet or Hot Charging of Continuous Casting Slab of chemical constituent in such as table 1, and annealed；So
It is processed afterwards according to the heat treatment process in such as table 2, obtains the steel plate with martensite and retained austenite heterogeneous structure；Most
After be tested for the property.As shown in table 2, steel plate provided by the invention, Rockwell hardness are rushed in 30~50HRC, Charpy v-notch
It hits work(and is more than 30J, 1000 DEG C of 100 hours oxidation weight gains are less than 3.5mg/cm2.Wherein Charpy V-type absorption work value (joule) is bigger,
Indicate that the toughness of steel plate is better, in steel plate notch or other stress concentration it is insensitive；1000 DEG C aoxidize for 100 hours
Increase weight (mg/cm2) indicate steel plate high-temperature oxidation resistance, gain in weight is smaller, and the high-temperature oxidation resistance of steel plate is better.
In embodiments of the present invention, the temperature of martensite and retained austenite heterogeneous structure is in Ms (martensite start) point
(Ms) between finishing temperature (Mf), the computational methods according to Ms temperature are：Ms (DEG C)=539-430 × [C+N] -30 ×
[Mn] -12 × [Cr] -5.0 × [Si], wherein [C], [Si], [Mn], [Cr], [N] are respectively C, Si, Mn, Cr, N in martensite
Weight content in stainless steel；The computational methods of Mf temperature are：Mf (DEG C)=Ms-250.Martensite and residual in the embodiment of the present invention
The temperature of remaining austenite heterogeneous structure, that is, cooling termination temperature control is at 150~220 DEG C (within the scope of Ms~Mf).Such as 1 institute of table
Show, the cooling termination temperature of embodiment 1 is 200 DEG C, and it is 22.25 that corresponding Ms (DEG C), which is 272.25 and Mf (DEG C), meets horse
The temperature of family name's body and retained austenite heterogeneous structure is between Ms (martensite start) point (Ms) and finishing temperature (Mf), similarly
Cooling termination temperature in embodiment 2-5 is satisfied by its corresponding temperature range (corresponding Ms~Mf temperature ranges).
According to above-mentioned computational methods, it is 55.6 that the Ms (DEG C) in comparative example 1, which is 305.6 and Mf (DEG C), corresponding cooling
Final temperature is 25 DEG C, not within the scope of 55.6~305.6 DEG C；Cooling termination temperature in comparative example 2 is 160 DEG C, meets it
Corresponding Ms~Mf temperature ranges (31.8~281.8 DEG C)；Cooling termination temperature in comparative example 3 is 25 DEG C, and it is right to be unsatisfactory for its
Ms~Mf the temperature ranges (51.45~301.45 DEG C) answered.
For comparative example 1, it is less than its martensite transfor mation finishing temperature Mf (55.6 for (25 DEG C) when its cooling termination temperature
DEG C) when, martensite transfor mation increased periods, the tissue in steel band is more transformed into martensite, then the residual austenite in steel band
Body is correspondingly reduced, and martensite is the important means for strengthening steel part, and the toughness or plasticity of austenite are preferable, and comparative example 1
Relation reheating temperature be 250 DEG C (are less than 350~500 DEG C of relation reheating temperatures in heat treatment process of the present invention), affect remnants
The stability of austenite, in conjunction with comparative example 1 in table 1 chemical composition it is found that vanadium, titanium, niobium element the sum of weight content be more than
0.25wt% so that its corresponding steel billet or continuous casting billet form more carbon, nitride in heat treatment process with interstitial element,
To affect carbon, nitrogen interstitial atom from by diffusing into austenite structure, that is, affecting austenite in martensitic structure
Stability, while manganese is austenitizing formation element, and the addition of manganese can make martensitic stain less steel be easier shape at high temperature
At austenite, the weight content of Mn elements is 0.4~3.0wt% of weight content that 0.35wt% is less than Mn elements in the present invention,
Also the stability of austenite is affected, therefore the performance parameter of comparative example 1 can be seen that it and finally obtain martensite from table 2
The Rockwell hardness of stainless steel is higher (40HRC), but poor (the ballistic work 13J, less than ballistic work of the embodiment of the present invention of its toughness
Average value 34J), not there is the martensitic stain less steel of high rigidity and high tenacity simultaneously.
Similarly, in comparative example 2 and 3 content of chemical composition not in the range of martensitic stain less steel provided by the invention
Interior, manufacturing method does not meet the heat treatment process (being shown in Table 2 comparative examples 2 and 3) of the present invention yet, and finally obtained martensite is not
Become rusty steel hardness is high, toughness and high-temperature oxidation resistance are poor (being shown in Table 2 comparative examples 2 and 3), if not carried in the present invention both
Within the scope of the martensitic stain less steel chemical composition content and its heat treatment process parameter of confession, then finally obtained martensite is stainless
The high-temperature oxidation resistance of steel is poor, and can not get both high rigidity and high tenacity.
In conclusion a kind of martensitic stain less steel provided by the invention and its manufacturing method, finally obtain while having height
The martensitic stain less steel of hardness and high tenacity, excellent high-temperature oxidation resistance is suitable for brake disc.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology can all carry out modifications and changes to above-described embodiment without violating the spirit and scope of the present invention.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should by the present invention claim be covered.
Claims (13)
1. a kind of martensitic stain less steel, which is characterized in that its chemical elements in percentage by mass is：C：0.01~0.18wt%,
Si：0.4~1.5wt%, Mn：0.4~3.0wt%, P≤0.04wt%, S：0.002~0.01wt%, Cr：11.0~
15.0wt%, N：0.01~0.15wt%, Nb：0.001~0.01wt%, V：0.05~0.25wt%, Ti：0.001~
0.01wt%, Mo：0.01~1.50wt%, B：0.0005~0.001wt%, surplus are Fe and inevitable impurity.
2. martensitic stain less steel according to claim 1, which is characterized in that its chemical elements in percentage by mass is：C：
0.03~0.15wt%, Si：0.53~1.25wt%, Mn：0.45~2.45wt%, Cr：11.2~14.5wt%, N：0.01~
0.08wt%Nb：0.001~0.007wt%, V：0.05~0.23wt%, Ti：0.002~0.008wt%, Mo：0.01~
1.10wt%, B：0.0005~0.0009wt%, surplus are Fe and inevitable impurity.
3. martensitic stain less steel according to claim 1 or 2, which is characterized in that its chemical element mass percent is also full
Foot：0.02wt%≤C+N≤0.20wt%.
4. martensitic stain less steel according to claim 1 or 2, which is characterized in that its chemical element mass percent is also full
Foot：V+Ti+Nb≤0.25wt%.
5. martensitic stain less steel according to claim 1 or 2, which is characterized in that microcosmic group of the martensitic stain less steel
It is woven to martensite and retained austenite heterogeneous structure.
6. martensitic stain less steel according to claim 5, which is characterized in that the phase of martensite described in the microstructure
Ratio is 55~65%, and the Phase Proportion of the retained austenite is 35~45%.
7. martensitic stain less steel according to claim 1 or 2, which is characterized in that the martensitic stain less steel passes through following
It is prepared by step：
(1) by steel billet or continuous casting billet, hot rolled steel plate or steel band is made in hot rolling, and anneals；
(2) by after annealing hot rolled steel plate or steel band be heated to 850~1000 DEG C heat preservation 5~30min, then to be more than or equal to 30
DEG C/speed of s is quickly cooled to martensite and austenite two-phase section, cooling termination temperature is 150~220 DEG C, is again heated to 350
~500 DEG C, it is air-cooled to room temperature, obtains the martensitic stain less steel.
8. a kind of manufacturing method of martensitic stain less steel, which is characterized in that include the following steps：
(1) by steel billet or continuous casting billet, hot rolled steel plate or steel band is made in hot rolling, and anneals；
(2) by after annealing hot rolled steel plate or steel band be heated to 850~1000 DEG C heat preservation 5~30min, then to be more than or equal to 30
DEG C/speed of s is quickly cooled to martensite and austenite two-phase section, cooling termination temperature is 150~220 DEG C, is again heated to 350
~500 DEG C, it is air-cooled to room temperature, obtains martensitic stain less steel,
Wherein, the chemical elements in percentage by mass of the martensitic stain less steel is：C：0.01~0.18wt%, Si：0.4~
1.5wt%, Mn：0.4~3.0wt%, P≤0.04wt%, S：0.002~0.01wt%, Cr：11.0~15.0wt%, N：
0.01~0.15wt%, Nb：0.001~0.01wt%, V：0.05~0.25wt%, Ti：0.001~0.01wt%, Mo：0.01
~1.50wt%, B：0.0005~0.001wt%, surplus are Fe and inevitable impurity.
9. the manufacturing method of martensitic stain less steel according to claim 8, which is characterized in that the martensitic stain less steel
Chemical elements in percentage by mass is：C：0.03~0.15wt%, Si：0.53~1.25wt%, Mn：0.45~2.45wt%,
Cr：11.2~14.5wt%, N：0.01~0.08wt%, Nb：0.001~0.007wt%, V：0.05~0.23wt%, Ti：
0.002~0.008wt%, Mo：0.01~1.10wt%, B：0.0005~0.0009wt%, surplus is for Fe and inevitably
Impurity.
10. the manufacturing method of martensitic stain less steel according to claim 8 or claim 9, which is characterized in that the martensite is stainless
The chemical elements in percentage by mass of steel also meets：0.02wt%≤C+N≤0.20wt%.
11. the manufacturing method of martensitic stain less steel according to claim 8 or claim 9, which is characterized in that the martensite is stainless
The chemical elements in percentage by mass of steel also meets：V+Ti+Nb≤0.25wt%.
12. the manufacturing method of martensitic stain less steel according to claim 8 or claim 9, which is characterized in that the martensite is stainless
The microstructure of steel is martensite and retained austenite heterogeneous structure.
13. the manufacturing method of martensitic stain less steel according to claim 12, which is characterized in that institute in the microstructure
The Phase Proportion for stating martensite is 55~65%, and the Phase Proportion of the retained austenite is 35~45%.
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| CN201810294036.3A CN108315650A (en) | 2018-03-30 | 2018-03-30 | A kind of martensitic stain less steel and its manufacturing method |
| JP2018102683A JP2019183255A (en) | 2018-03-30 | 2018-05-29 | Martensitic stainless steel and manufacturing process therefor |
| US16/052,324 US20190300981A1 (en) | 2018-03-30 | 2018-08-01 | Martensitic Stainless Steel and Manufacturing Process Therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109280862A (en) * | 2018-12-03 | 2019-01-29 | 常熟理工学院 | A kind of automobile brake disc high abrasion stainless steel and its manufacturing method |
| CN111471940A (en) * | 2020-04-29 | 2020-07-31 | 钢铁研究总院 | High-strength stainless steel rotor and preparation method thereof |
| CN111944970A (en) * | 2020-09-02 | 2020-11-17 | 湖州南浔超盛金属制品有限公司 | Heat treatment method of hot-rolled angle steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017182896A1 (en) * | 2016-04-22 | 2017-10-26 | Aperam | A process for manufacturing a martensitic stainless steel part from a sheet |
| CN112064015A (en) * | 2020-09-11 | 2020-12-11 | 阳江市佰伦实业有限公司 | 430 antibacterial stainless steel cladding cutter and preparation method thereof |
| JP2023000442A (en) * | 2021-06-18 | 2023-01-04 | 大同特殊鋼株式会社 | Martensitic stainless steel, martensitic stainless steel member, and manufacturing method thereof |
| CN113523505B (en) * | 2021-07-19 | 2023-03-14 | 河北钢研德凯科技有限公司 | Welding method of martensitic stainless steel and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105200346A (en) * | 2015-09-22 | 2015-12-30 | 江苏新核合金科技有限公司 | 12Cr13 bar used for evaporator pull rods and pull rod nuts |
| CN106480377A (en) * | 2016-10-09 | 2017-03-08 | 宝钢不锈钢有限公司 | Martensitic stain less steel and its manufacture method with excellent mechanical property and antioxygenic property |
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| JP2003253340A (en) * | 2001-12-25 | 2003-09-10 | Jfe Steel Kk | Process for manufacturing low-carbon martensitic stainless steel sheet showing excellent corrosion resistance and machinability |
| KR101656980B1 (en) * | 2013-02-08 | 2016-09-12 | 닛폰 스틸 앤드 스미킨 스테인레스 스틸 코포레이션 | Stainless steel brake disc and method for manufacturing same |
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2018
- 2018-03-30 CN CN201810294036.3A patent/CN108315650A/en active Pending
- 2018-05-29 JP JP2018102683A patent/JP2019183255A/en active Pending
- 2018-08-01 US US16/052,324 patent/US20190300981A1/en not_active Abandoned
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105200346A (en) * | 2015-09-22 | 2015-12-30 | 江苏新核合金科技有限公司 | 12Cr13 bar used for evaporator pull rods and pull rod nuts |
| CN106480377A (en) * | 2016-10-09 | 2017-03-08 | 宝钢不锈钢有限公司 | Martensitic stain less steel and its manufacture method with excellent mechanical property and antioxygenic property |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109280862A (en) * | 2018-12-03 | 2019-01-29 | 常熟理工学院 | A kind of automobile brake disc high abrasion stainless steel and its manufacturing method |
| CN111471940A (en) * | 2020-04-29 | 2020-07-31 | 钢铁研究总院 | High-strength stainless steel rotor and preparation method thereof |
| CN111471940B (en) * | 2020-04-29 | 2021-09-10 | 钢铁研究总院 | High-strength stainless steel rotor and preparation method thereof |
| CN111944970A (en) * | 2020-09-02 | 2020-11-17 | 湖州南浔超盛金属制品有限公司 | Heat treatment method of hot-rolled angle steel |
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| US20190300981A1 (en) | 2019-10-03 |
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