CN111850423A - Austenite nonmagnetic stainless steel material - Google Patents
Austenite nonmagnetic stainless steel material Download PDFInfo
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- CN111850423A CN111850423A CN201910355552.7A CN201910355552A CN111850423A CN 111850423 A CN111850423 A CN 111850423A CN 201910355552 A CN201910355552 A CN 201910355552A CN 111850423 A CN111850423 A CN 111850423A
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- stainless steel
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- steel material
- magnetic stainless
- austenite
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
Abstract
The invention provides an austenite nonmagnetic stainless steel material, which comprises the following components: 15-19 wt% of Mn, 10-18 wt% of Cr, 0.4-1.4 wt% of Cu, 1.0-1.4 wt% of Ni, more than 0 and less than or equal to 0.23 wt% of C, more than 0 and less than or equal to 0.24 wt% of N and the balance of Fe. This application reduces the content of Ni through improving the content of Mn, Cu and N for the work hardening effect of stainless steel improves, and the intensity and the hardness of fracture belt region material improve in blanking process.
Description
Technical Field
The invention relates to the technical field of metal materials, in particular to an austenite nonmagnetic stainless steel material.
Background
The new energy electric automobile is a vehicle which takes a vehicle-mounted power supply as power and drives wheels by a motor to run and meets various requirements of road traffic and safety regulations. It is powered by an electric motor stored in a battery.
The driving motor is one of the key technologies of new energy automobiles. When a rotor and a stator of a driving motor of a new energy automobile are developed for a client, a part structure designed by the user is very special, and the performance requirement of the part is particularly high; one part is a large support ring which is a support part for a rotor guide bar of a driving motor and a copper short-circuit ring under the centrifugal force in a high-speed state and needs to bear alternating thermal stress and strong yield strength and ductility; meanwhile, the copper bar is required to be inserted and attached, the requirement on the tooth space precision is high, and the material is generally made of stainless steel. In order to meet the requirements of customers, a novel non-magnetic stainless steel material with special requirements on chemical elements and mechanical properties needs to be designed.
Disclosure of Invention
The invention aims to provide an austenite nonmagnetic stainless steel material which has good mechanical properties.
In view of this, the present application provides an austenitic non-magnetic stainless steel material, comprising:
preferably, one or more of Nb, Ti, V and B is also included, and Nb + Ti + V + B is less than or equal to 0.22 wt%.
Preferably, the content of Mn is 15.2-16.8 wt%.
Preferably, the content of Cr is 12-16 wt%.
Preferably, the content of Cu is 0.8-1.2 wt%.
Preferably, the content of Ni is 1.8-3.2 wt%.
Preferably, the content of C is 0.03-0.20 wt%.
Preferably, the content of N is 0.05-0.18 wt%.
Preferably, the austenite non-magnetic stainless steel material is obtained according to the steps of electric furnace smelting, ladle furnace refining, vacuum treatment, bottom casting die casting, casting blank heating, rolling, tempering treatment and air cooling.
The application provides an austenite non-magnetic stainless steel material which comprises 15-19 wt% of Mn, 10-18 wt% of Cr, 0.4-1.4 wt% of Cu, 1.0-1.4 wt% of Ni, more than 0 and less than or equal to 0.23 wt% of C, more than 0 and less than or equal to 0.24 wt% of N and the balance of Fe; this application reduces the content of Ni through improving the content of Mn, Cu and N for the work hardening effect of stainless steel improves, and the intensity and the hardness of fracture belt region material improve in blanking process.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
Aiming at the special performance requirements of a new energy automobile driving motor on a stainless steel end ring product in the prior art, the invention develops a novel austenite non-magnetic stainless steel material, and the novel austenite non-magnetic stainless steel material has better mechanical performance and mechanical performance through the change and adjustment of chemical elements. The embodiment of the invention discloses an austenite nonmagnetic stainless steel material, which comprises the following components:
the austenite nonmagnetic stainless steel is obtained by adding a proper amount of elements such as Ni, Mn, C, N, Cu and the like into steel, so that the matrix elements in the steel are still austenite at room temperature, and the austenite is paramagnetic.
In the application, Mn is used for improving the solubility of N in steel, saving the content of Ni element and stabilizing the austenite structure. The content of Mn is 15-19 wt%; in a specific embodiment, the content of Mn is 15 wt% to 18 wt%; in a specific embodiment, the content of Mn is 15.2 wt% to 16.8 wt%; more specifically, the content of Mn is 15.5 wt% to 16.5 wt%.
The Cr element can improve the corrosion resistance of the steel. The content of the Cr is 10-18 wt%; in a specific embodiment, the content of Cr is 11 wt% to 17 wt%; in a specific embodiment, the content of Cr is 12 wt% to 16 wt%; in a specific embodiment, the content of Cr is 13.2 wt% to 15.8 wt%.
The Cu element can improve the plasticity and cold processing performance of the material. The content of Cu is 0.4-1.4 wt%; in a specific embodiment, the content of Cu is 0.8 wt% to 1.2 wt%; in certain embodiments, the Cu content is 0.9 wt% to 1.1 wt%.
The Ni element can form austenite, and the corrosion resistance of the material is improved. The content of the Ni is 1.0 wt% -4.0 wt%; in certain embodiments, the Ni content is 1.8 wt% to 3.2 wt%; in certain embodiments, the Ni content is 2.1 wt% to 3.0 wt%; in certain embodiments, the Ni content is 2.3 wt% to 2.8 wt%.
In the present application, C stabilizes the austenite structure and improves the strength. The content of C is more than 0 and less than or equal to 0.23 wt%; in certain embodiments, the C is present in an amount of 0.03 wt% to 0.20 wt%; in certain embodiments, the C is present in an amount of 0.08 wt% to 0.15 wt%; in certain embodiments, the C is present in an amount of 0.09 wt% to 0.12 wt%.
In the application, N replaces partial Ni element, can stabilize austenite structure, refine grains, improve strength, does not reduce ductility and toughness, and improves corrosion resistance of steel. The content of N is more than 0 and less than or equal to 0.24 wt%; in certain embodiments, the N is present in an amount of 0.02 wt% to 0.20 wt%; in certain embodiments, the N is present in an amount of 0.05 wt% to 0.18 wt%; in certain embodiments, the N is present in an amount of 0.06 wt% to 0.16 wt%; in certain embodiments, the N is present in an amount of 0.08 wt% to 0.12 wt%.
The austenite nonmagnetic stainless steel material also comprises trace elements such as Nb, Ti, V, B and the like, wherein the trace elements can be added into one or more of the materials; however, the total amount of the above alloy elements is required to be less than or equal to 0.22 wt%.
According to the present invention, the austenitic non-magnetic stainless steel material is prepared according to a method well known to those skilled in the art, and the present application is not particularly limited; illustratively, the austenitic nonmagnetic stainless steel material is prepared by the following sequence: electric furnace smelting, ladle furnace refining, vacuum treatment, bottom casting die casting, casting blank heating, rolling, tempering treatment and air cooling; the above processes are all technical means well known to those skilled in the art, and the specific operation procedures thereof are not specifically described in the present application.
The austenitic non-magnetic stainless steel material provided by the application comprises Mn, Cr, Cu, Ni, C, N and Fe; this application is through improving the content of Mn, Cu, N, reduces the content of Ni, makes the work hardening effect of stainless steel improve, and fracture band region intensity and hardness improvement are great in blanking process, and plasticity and toughness reduce less, and this kind of change is favorable to preventing this kind of stainless steel panel blanking in-process from taking place the sticking die defect, and the blanking face can also obtain better surface quality.
In order to further understand the present invention, the following detailed description is made on the austenite non-magnetic stainless steel material provided by the present invention with reference to the following examples, and the scope of the present invention is not limited by the following examples.
Examples
Preparing different austenitic non-magnetic stainless steel materials by using the alloy elements shown in the table 1 according to the steps of electric furnace smelting, ladle furnace refining, vacuum treatment, bottom casting die casting, casting blank heating, rolling, tempering treatment and air cooling, wherein the different austenitic non-magnetic stainless steel materials are respectively marked as example 1, example 2, example 3, example 4 and example 5;
TABLE 1 ingredient numbers of Austenitic nonmagnetic stainless Steel materials prepared in examples 1 to 5
According to the table (wt%)
| Group of | Mn | Cr | Cu | Ni | C | N | Nb | Ti | V | B | Fe |
| Example 1 | 15 | 10 | 0.4 | 1.0 | 0.05 | 0.05 | 0 | 0.10 | 0 | 0 | Surplus |
| Example 2 | 19 | 12 | 1.0 | 2.8 | 0.23 | 0.12 | 0.10 | 0.08 | 0 | 0.02 | Surplus |
| Example 3 | 15.2 | 18 | 1.1 | 2.0 | 0.12 | 0.24 | 0 | 0.14 | 0.02 | 0.01 | Surplus |
| Example 4 | 16.8 | 13.8 | 1.4 | 3.2 | 0.18 | 0.18 | 0.22 | 0 | 0 | 0 | Surplus |
| Example 5 | 16.0 | 16 | 0.9 | 4.0 | 0.16 | 0.22 | 0 | 0 | 0 | 0 | Surplus |
The properties of the austenitic non-magnetic stainless steel materials of examples 1 to 5 were measured according to a conventional method of the prior art, and the results are shown in table 2:
TABLE 2 tables of Performance data for examples 1 to 5
| Group of | Yield strength/MPa | Tensile strength/MPa | Elongation/percent | Relative magnetic permeability |
| Example 1 | 680 | 912 | 28 | 1.02 |
| Example 2 | 720 | 930 | 32 | 1.05 |
| Example 3 | 712 | 915 | 31 | 0.98 |
| Example 4 | 721 | 900 | 31 | 1.03 |
| Example 5 | 718 | 880 | 33 | 1.01 |
The above description of the embodiments is only intended to facilitate an understanding of the method of the invention and its core ideas. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. An austenitic non-magnetic stainless steel material comprising:
2. the austenitic non-magnetic stainless steel material according to claim 1, further comprising one or more of Nb, Ti, V and B, and Nb + Ti + V + B is 0.22 wt% or less.
3. The austenitic non-magnetic stainless steel material according to claim 1, wherein the content of Mn is 15.2-16.8 wt%.
4. The austenitic non-magnetic stainless steel material according to claim 1, wherein the content of Cr is 12-16 wt%.
5. The austenitic non-magnetic stainless steel material according to claim 1, wherein the Cu content is 0.8-1.2 wt%.
6. The austenitic non-magnetic stainless steel material according to claim 1, wherein the content of Ni is 1.8-3.2 wt%.
7. The austenitic non-magnetic stainless steel material according to claim 1, wherein the content of C is 0.03-0.20 wt%.
8. The austenitic non-magnetic stainless steel material according to claim 1, wherein the content of N is 0.05-0.18 wt%.
9. The austenitic non-magnetic stainless steel material according to claim 1, wherein the austenitic non-magnetic stainless steel material is obtained by the steps of electric furnace smelting, ladle furnace refining, vacuum treatment, bottom casting die casting, billet heating, rolling, tempering treatment and air cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910355552.7A CN111850423A (en) | 2019-04-29 | 2019-04-29 | Austenite nonmagnetic stainless steel material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910355552.7A CN111850423A (en) | 2019-04-29 | 2019-04-29 | Austenite nonmagnetic stainless steel material |
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| CN111850423A true CN111850423A (en) | 2020-10-30 |
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| CN201910355552.7A Pending CN111850423A (en) | 2019-04-29 | 2019-04-29 | Austenite nonmagnetic stainless steel material |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4822556A (en) * | 1987-02-26 | 1989-04-18 | Baltimore Specialty Steels Corporation | Austenitic stainless steel combining strength and resistance to intergranular corrosion |
| CN101148740A (en) * | 2007-10-10 | 2008-03-26 | 江苏省方通新型不锈钢制品股份有限公司 | Chromium-manganese-copper-molybdenum series austenite corrosion-resistant wear-proof stainless steel |
| CN101597721A (en) * | 2009-07-08 | 2009-12-09 | 中原特钢股份有限公司 | Steel for non-magnetic drilling tool and production method thereof |
-
2019
- 2019-04-29 CN CN201910355552.7A patent/CN111850423A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4822556A (en) * | 1987-02-26 | 1989-04-18 | Baltimore Specialty Steels Corporation | Austenitic stainless steel combining strength and resistance to intergranular corrosion |
| CN101148740A (en) * | 2007-10-10 | 2008-03-26 | 江苏省方通新型不锈钢制品股份有限公司 | Chromium-manganese-copper-molybdenum series austenite corrosion-resistant wear-proof stainless steel |
| CN101597721A (en) * | 2009-07-08 | 2009-12-09 | 中原特钢股份有限公司 | Steel for non-magnetic drilling tool and production method thereof |
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Application publication date: 20201030 |
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