CN106048158B - 0Cr17Ni4Cu4Nb stainless steel material heat treatment process - Google Patents
0Cr17Ni4Cu4Nb stainless steel material heat treatment process Download PDFInfo
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- CN106048158B CN106048158B CN201610609052.8A CN201610609052A CN106048158B CN 106048158 B CN106048158 B CN 106048158B CN 201610609052 A CN201610609052 A CN 201610609052A CN 106048158 B CN106048158 B CN 106048158B
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- 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
- C21D1/30—Stress-relieving
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- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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- 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
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Abstract
The present invention discloses a kind of OCr17Ni4Cu4Nb stainless steel materials heat treatment process comprising：Step 1: selective laser fusing Forming Workpiece eliminates the annealing steps of residual stress as early as possible；Step 2: austenite in stainless steel material microstructure is made to homogenize, so that intensified element and carbon is solid-solution in austenite, mainly dissolved the solutionizing step of the copper-rich phase of original precipitation；Step 3: martensite in stainless steel material microstructure is made to be uniformly distributed in lath-shaped, the ageing stage of tiny carbide particle is precipitated between lath on martensitic matrix.The heat treatment process can effectively adjust yield strength and elongation percentage in selective laser fusing forming OCr17Ni4Cu4Nb stainless steel material mechanical properties, adjust material microstructure form, the difference between control forming direction and vertical direction.
Description
Technical field
The present invention relates to 0Cr17Ni4Cu4Nb stainless steel materials technical field of heat treatment more particularly to selective laser to melt
The 0Cr17Ni4Cu4Nb stainless steel material heat treatment process of forming technique manufacture.
Background technology
Selective laser fusing forming can fast implement the sufficiently complex structure of shape, but after shaping stainless steel material power
Yield strength is relatively low in performance, and the mechanical property for shaping direction and vertical direction has larger difference, influences structure use.It should
Heat treatment process can be adjusted effectively in selective laser fusing forming 0Cr17Ni4Cu4Nb stainless steel material mechanical properties
Yield strength and elongation percentage adjust material microstructure form, the difference between control forming direction and vertical direction.It is main to use
In the heat treatment process of the 0Cr17Ni4Cu4Nb stainless steel parts of selective laser fusing forming.
Invention content
It is an object of the invention to overcome the shortage of prior art, a kind of selective laser fusing forming is provided
0Cr17Ni4Cu4Nb stainless steel material heat treatment process can solve the 0Cr17Ni4Cu4Nb of selective laser fusing figuration manufacture
Stainless steel material mechanical property is relatively low and anisotropic problem.
The 0Cr17Ni4Cu4Nb stainless steel material heat treatment process of the present invention, including：Step 1: selective laser is fused into
The annealing steps for eliminating residual stress as early as possible of shape；Step 2: austenite in stainless steel material microstructure is made to homogenize, make strong
Change element and carbon is solid-solution in austenite, mainly dissolves the solutionizing step of the copper-rich phase of original precipitation；Step 3: making stainless
Martensite is uniformly distributed in lath-shaped in Steel material microstructure, and tiny carbide is precipitated between lath on martensitic matrix
The ageing stage of particle.
It is preferred that the step 1 is to keep the temperature 4 hours at 650 DEG C to carry out argon gas cooling again.
It is preferred that the step 2 is to keep the temperature 1.5 hours argon gas at 1150 DEG C to be cooled to 1040 DEG C and keep the temperature 1 hour.
It is preferred that the step 3 is to keep the temperature 4 hours at 540 DEG C, then carry out argon gas cooling.
Fusing forming 0Cr17Ni4Cu4Nb stainless steel material heat treatment process in selective laser provided in an embodiment of the present invention,
It is more than using the selective laser fusing forming 0Cr17Ni4Cu4Nb stainless steel material tensile strength of mechanical property of the process
1160MPa, yield strength are more than 1050MPa, and elongation percentage is more than 15%, shapes mechanical property difference between direction and vertical direction
Less than 5%.
Specific implementation mode
Specific embodiments of the present invention are described in detail below.In the following description, unrestricted for explanation
Property purpose, elaborate detail, with help be apparent from the present invention.It will be apparent however, to one skilled in the art that it is aobvious and
It is clear to, the present invention can also be put into practice in the other embodiments departing from these details.
An embodiment of the present invention provides a kind of selective lasers to melt forming 0Cr17Ni4Cu4Nb stainless steel materials heat treatment work
Skill, including annealing temperature and time, solid solubility temperature and time, aging temp and time.
Wherein, cooling is quickly solidified due to melting forming process in which materials in selective laser, there are larger residual in part
Residue stress, therefore stress relief annealing should be carried out as early as possible after the fusing forming of selective laser；
Solid solution process makes austenitic formation and homogenization in stainless steel material microstructure, and intensified element and carbon is made to be solid-solution in
In austenite, the copper-rich phase of original precipitation has mainly been dissolved；
Ag(e)ing process makes martensite in stainless steel material microstructure be uniformly distributed in lath-shaped, on martensitic matrix and
Tiny carbide particle is precipitated between lath.
Heat treatment process flow includes annealing, solid solution and timeliness, annealing process：Keeping the temperature 4 hours again at 650 DEG C, argon gas is cold
But；Solid solution craft：It keeps the temperature 1.5 hours argon gas at 1150 DEG C to be cooled to 1040 DEG C and keep the temperature 1 hour, then argon gas cooling；Timeliness work
Skill：Keeping the temperature 4 hours again at 540 DEG C, argon gas cools down.
Its operation principle is：Forming process in which materials is melted due to selective laser and quickly solidifies cooling, exist in part compared with
Big residual stress, therefore annealing process is taken to eliminate residual stress first.Solid solution is using high temperature solid solution and medium temperature solid solution phase knot
It closes, accelerates the formation of austenite and the process of homogenization, increase the solubility of carbides in austenite, make more intensified elements
It is solid-solution in austenite with carbon, to which the saturation degree of martensite after solid solution increases, retains after timeliness and be precipitated more
Copper-rich phase and hardening constituent carbide enhance alloy dispersion-strengthened action.Fine Texture of Material recrystallizes in ag(e)ing process, subtracts
The anisotropy of few material.
Fusing forming 0Cr17Ni4Cu4Nb stainless steel material heat treatment process in selective laser provided in this embodiment, uses
The selective laser fusing forming 0Cr17Ni4Cu4Nb stainless steel material tensile strength of mechanical property of the process is more than
1160MPa, yield strength are more than 1050MPa, and elongation percentage is more than 15%, shapes mechanical property difference between direction and vertical direction
Less than 5%.
The many features and advantage of these embodiments are clear according to the detailed description, therefore appended claims are intended to
Cover all these feature and advantage of these embodiments fallen into its true spirit and range.Further, since this field
Technical staff is readily apparent that many modifications and changes, therefore is not meant to the embodiment of the present invention being limited to illustrated and description essence
Really structurally and operationally, but all suitable modifications and the equivalent fallen within the scope of its can be covered.
Unspecified part of the present invention is known to the skilled person technology.
Claims (2)
1. a kind of 0Cr17Ni4Cu4Nb stainless steel materials heat treatment process is the technique based on selective laser fusing forming, special
Sign is, including：
Step 1: selective laser fusing Forming Workpiece eliminates the annealing steps of residual stress as early as possible, 4 hours are kept the temperature at 650 DEG C
Argon gas cooling is carried out again；
It is cooled to 1040 DEG C Step 2: keeping the temperature 1.5 hours argon gas at 1150 DEG C and keeps the temperature 1 hour, keep stainless steel material microcosmic
Austenite homogenizes in tissue, and intensified element and carbon is made to be solid-solution in austenite, is to have dissolved the copper-rich phase of original precipitation to consolidate
Molten step；
Step 3: martensite in stainless steel material microstructure is made to be uniformly distributed in lath-shaped, on martensitic matrix and lath
Between the ageing stage of tiny carbide particle is precipitated.
2. 0Cr17Ni4Cu4Nb stainless steel materials heat treatment process according to claim 1, it is characterised in that：The step
Rapid three be to keep the temperature 4 hours at 540 DEG C, then carry out argon gas cooling.
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| CN106048158B true CN106048158B (en) | 2018-10-19 |
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| CN108213422B (en) * | 2017-12-20 | 2020-02-11 | 中南大学 | Preparation method of carbon-containing high-entropy alloy composite material |
| CN108588366B (en) * | 2017-12-25 | 2019-11-29 | 西安航天发动机有限公司 | A kind of heat treatment method of selective laser fusing forming 06Cr19Ni10 austenitic stainless steel |
| CN109487061B (en) * | 2019-01-10 | 2020-07-07 | 成都先进金属材料产业技术研究院有限公司 | Heat treatment method of martensite precipitation hardening stainless steel 06Cr15Ni5Cu2Ti |
| CN110144441B (en) * | 2019-05-29 | 2021-02-12 | 西安理工大学 | Heat treatment method of 0Cr13Ni5Mo stainless steel |
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| KR20110045184A (en) * | 2009-10-26 | 2011-05-04 | 금오공과대학교 산학협력단 | A method for heat treating 17-4 precipitation hardening stainless steel |
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