CN113481439A - Nitrogen-containing stainless steel, and preparation method and application of component - Google Patents
Nitrogen-containing stainless steel, and preparation method and application of component Download PDFInfo
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- CN113481439A CN113481439A CN202110764378.9A CN202110764378A CN113481439A CN 113481439 A CN113481439 A CN 113481439A CN 202110764378 A CN202110764378 A CN 202110764378A CN 113481439 A CN113481439 A CN 113481439A
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- 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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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Abstract
In order to solve the technical problem that the existing nitrogen-containing stainless steel in the prior art is not suitable for additive manufacturing, the embodiment of the invention provides nitrogen-containing stainless steel, a component preparation method and application; the nitrogen-containing stainless steel takes iron as a matrix element and comprises the following alloy elements in percentage by mass: 0.02-0.09% of C, 0.2-0.5% of Si, 6.5-7.5% of Mn, 10-11% of Ni, 18-19% of Cr, 0.9-1.5% of Mo, 0.08-0.18% of N, 0.25-0.35% of V and 0.25-0.35% of Nb; the component preparation method comprises the step of preparing the stainless steel containing nitrogen into an ingot by adopting an induction furnace smelting mode. Use of the nitrogen-containing stainless steel or an ingot produced by the method of preparation in additive manufacturing. According to the embodiment of the invention, the process stability of the nitrogen-containing stainless steel in the additive manufacturing process is improved through reasonable matching of all elements, and the short-process integrated forming of the high-ductility and toughness nitrogen-containing stainless steel is realized.
Description
Technical Field
The invention relates to nitrogen-containing stainless steel, a preparation method of a component and application of the component.
Background
Nitrogen is introduced into the nitrogen-containing stainless steel as one of main alloy elements for stabilizing austenite, so that the use amount of relatively noble Ni element is reduced; in addition, the nitrogen element has obvious solid solution strengthening effect on the austenitic stainless steel on the premise of less influence on the ductility and toughness. Owing to the economic and performance advantages, nitrogen-containing stainless steels have found wide application in the industrial field.
The metal additive manufacturing has obvious advantages in the aspect of integrated forming of high-performance complex structural parts, and is widely applied to materials such as AlSi10Mg aluminum alloy, TC4 titanium alloy, 316L stainless steel and the like at present. However, there is currently little research on additive manufacturing of nitrogen-containing stainless steel.
The existing research results show that the solubility of nitrogen in the stainless steel melt is gradually reduced along with the temperature rise; the highest temperature of a molten pool in the stainless steel additive manufacturing process usually exceeds 2000 ℃, and nitrogen elements are easy to volatilize and burn at the overhigh temperature and induce defects such as air holes and cracks. Meanwhile, the grain refinement of the existing stainless steel depends on the processes of forging, extrusion and the like, and the structural defects such as coarse columnar grains and the like are easily generated in the additive manufacturing process, so that the performance indexes such as plasticity, impact toughness and the like are obviously reduced.
Therefore, the existing nitrogen-containing stainless steel is not suitable for additive manufacturing.
Disclosure of Invention
In order to solve the technical problem that the existing nitrogen-containing stainless steel in the prior art is not suitable for additive manufacturing, the embodiment of the invention provides nitrogen-containing stainless steel, a component preparation method and application.
The embodiment of the invention is realized by the following technical scheme:
in a first aspect, an embodiment of the present invention provides a nitrogen-containing stainless steel, which uses iron as a base element, and includes the following alloying elements in mass fraction: 0.02-0.09% of C, 0.2-0.5% of Si, 6.5-7.5% of Mn, 10-11% of Ni, 18-19% of Cr, 0.9-1.5% of Mo, 0.08-0.18% of N, 0.25-0.35% of V and 0.25-0.35% of Nb.
Further, the sum of the mass fractions of the other impurity elements in the nitrogen-containing stainless steel is not higher than 0.4%.
Wherein, the N element is too low to achieve the strengthening effect, and the N element is too high to easily generate the defects of air holes and the like. Aiming at the additive manufacturing process, the mass fraction of N element in the nitrogen-containing stainless steel provided by the embodiment of the invention is 0.08-0.18%.
In order to improve the solubility of the N element in a high-temperature melt, the nitrogen-containing stainless steel of the embodiment of the invention introduces enough Mn and Cr elements, wherein the mass fraction of the Cr element is 18-19%, and the mass fraction of the Mn element is 6.5-7.5%. Based on the coupling effect of Cr and Mn, the process stability in the additive manufacturing process and the compactness of the nitrogen-containing stainless steel manufactured by additive manufacturing are obviously improved.
The mass fraction of Si in the nitrogen-containing stainless steel of the embodiment of the invention is 0.2-0.5%. Aiming at the characteristic that the specific surface area of the additive manufacturing powder is far higher than that of the traditional cast-forged part, the nitrogen-containing stainless steel of the embodiment of the invention limits the minimum amount of Si element to be 0.2% so as to play roles of deoxidation and oxidation resistance. Meanwhile, Si is a ferrite-forming element, and the maximum limit amount of Si is 0.5% in order to improve the austenite stability of the nitrogen-containing stainless steel according to the embodiment of the present invention.
Aiming at the problem that coarse columnar crystals are easy to appear in an additive manufacturing sample, the nitrogen-containing stainless steel of the embodiment of the invention introduces V and Nb elements. The lower limit of the mass fraction of the V and Nb elements is 0.25 percent, thereby playing the roles of inhibiting the growth of columnar crystals and refining certain crystal grains. The upper limit of the elements V and Nb is 0.35% to prevent the formation of excessive nitrides and reduce the consumption of nitrogen elements by V and Nb.
In order to further reduce the consumption of nitrogen elements by V and Nb, the nitrogen-containing stainless steel of the embodiment of the invention introduces C element as an alloy element, and the lower limit of the mass fraction of the C element is 0.02%. Meanwhile, in order to avoid the reduction of ductility and toughness caused by excessive C element, the upper limit of the mass fraction is 0.09%.
The mass fraction of Mo in the nitrogen-containing stainless steel of the embodiment of the invention is 0.9-1.5% so as to play the roles of solid solution strengthening and corrosion resistance improvement.
The mass fraction of Ni in the nitrogen-containing stainless steel of the embodiment of the invention is 10-11% so as to play the role of stabilizing austenite.
Further, the nitrogen-containing stainless steel is in a powder form.
In a second aspect, an embodiment of the present invention provides a method for preparing a nitrogen-containing stainless steel component, including:
and preparing the stainless steel containing nitrogen into an ingot by adopting an induction furnace smelting mode.
Further, the preparation method further comprises the following steps:
preparing the ingot into powder by adopting a nitrogen atomization mode;
and (3) processing and shaping the powder by adopting an additive manufacturing process.
The ingot is prepared into powder by using a nitrogen atomization mode. And the qualified powder components are subjected to qualification test, and the qualified powder components meet the requirements of the mass percentage ranges of all the components in the nitrogen-containing stainless steel.
The nitrogen-containing stainless steel powder is processed and formed through an additive manufacturing process, and nitrogen is used as a protective atmosphere in the additive manufacturing process. Different from stainless steel such as 316L and the like which adopts argon as protective atmosphere, the additive manufacturing process of the stainless steel of the invention adopts nitrogen as protective atmosphere, which can play a role in inhibiting nitrogen element volatilization and improving the density of stainless steel parts.
Further, the additive manufacturing process takes nitrogen as a protective atmosphere.
Further, the smelting of the induction furnace is vacuum smelting or nitrogen protection smelting.
Further, the cast ingot is cooled and formed by a metal mold.
The metal mold can improve the cooling rate of the cast ingot and play a role in inhibiting component segregation. Optionally, the surface of the ingot is cleaned to improve the stability of the alloy composition, and the cleaning mode comprises grinding, lathe machining and milling machine machining.
Further, the area of the cross section vertical to the length direction of the ingot is not more than 200 square centimeters.
The restriction of the cross-sectional size can play a role in suppressing the segregation of components.
In a third aspect, the embodiment of the invention provides application of the nitrogen-containing stainless steel or an ingot prepared by the preparation method in additive manufacturing.
Compared with the prior art, the invention has the following advantages and beneficial effects:
according to the nitrogen-containing stainless steel, the preparation method and the application of the component, disclosed by the embodiment of the invention, the process stability of the nitrogen-containing stainless steel in the additive manufacturing process is improved through reasonable matching of all elements, and the short-process integrated forming of the high-ductility and toughness nitrogen-containing stainless steel is realized.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
FIG. 1 shows the first stretch curve of example 1.
FIG. 2 shows the second stretch curve of example 2.
FIG. 3 shows the third stretch curve of example 3.
FIG. 4 is the impact displacement-energy absorption curve of example 3.
Fig. 5 is a tensile curve four of comparative example 1.
Fig. 6 is a tensile curve five of comparative example 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
In a first aspect, an embodiment of the present invention provides a nitrogen-containing stainless steel, which uses iron as a base element, and includes the following alloying elements in mass fraction: 0.02-0.09% of C, 0.2-0.5% of Si, 6.5-7.5% of Mn, 10-11% of Ni, 18-19% of Cr, 0.9-1.5% of Mo, 0.08-0.18% of N, 0.25-0.35% of V and 0.25-0.35% of Nb.
Further, the sum of the mass fractions of the other impurity elements in the nitrogen-containing stainless steel is not higher than 0.4%.
Wherein, the N element is too low to achieve the strengthening effect, and the N element is too high to easily generate the defects of air holes and the like. Aiming at the additive manufacturing process, the mass fraction of N element in the nitrogen-containing stainless steel provided by the embodiment of the invention is 0.08-0.18%.
In order to improve the solubility of the N element in a high-temperature melt, the nitrogen-containing stainless steel of the embodiment of the invention introduces enough Mn and Cr elements, wherein the mass fraction of the Cr element is 18-19%, and the mass fraction of the Mn element is 6.5-7.5%. Based on the coupling effect of Cr and Mn, the process stability in the additive manufacturing process and the compactness of the nitrogen-containing stainless steel manufactured by additive manufacturing are obviously improved.
The mass fraction of Si in the nitrogen-containing stainless steel of the embodiment of the invention is 0.2-0.5%. Aiming at the characteristic that the specific surface area of the additive manufacturing powder is far higher than that of the traditional cast-forged part, the nitrogen-containing stainless steel of the embodiment of the invention limits the minimum amount of Si element to be 0.2% so as to play roles of deoxidation and oxidation resistance. Meanwhile, Si is a ferrite-forming element, and the maximum limit amount of Si is 0.5% in order to improve the austenite stability of the nitrogen-containing stainless steel according to the embodiment of the present invention.
Aiming at the problem that coarse columnar crystals are easy to appear in an additive manufacturing sample, the nitrogen-containing stainless steel of the embodiment of the invention introduces V and Nb elements. The lower limit of the mass fraction of the V and Nb elements is 0.25 percent, thereby playing the roles of inhibiting the growth of columnar crystals and refining certain crystal grains. The upper limit of the elements V and Nb is 0.35% to prevent the formation of excessive nitrides and reduce the consumption of nitrogen elements by V and Nb.
In order to further reduce the consumption of nitrogen elements by V and Nb, the nitrogen-containing stainless steel of the embodiment of the invention introduces C element as an alloy element, and the lower limit of the mass fraction of the C element is 0.02%. Meanwhile, in order to avoid the reduction of ductility and toughness caused by excessive C element, the upper limit of the mass fraction is 0.09%.
The mass fraction of Mo in the nitrogen-containing stainless steel of the embodiment of the invention is 0.9-1.5% so as to play the roles of solid solution strengthening and corrosion resistance improvement.
The mass fraction of Ni in the nitrogen-containing stainless steel of the embodiment of the invention is 10-11% so as to play the role of stabilizing austenite.
Further, the nitrogen-containing stainless steel is in a powder form.
In a second aspect, an embodiment of the present invention provides a method for preparing a nitrogen-containing stainless steel component, including:
and preparing the stainless steel containing nitrogen into an ingot by adopting an induction furnace smelting mode.
Further, the preparation method further comprises the following steps:
preparing the ingot into powder by adopting a nitrogen atomization mode;
and (3) processing and shaping the powder by adopting an additive manufacturing process.
The ingot is prepared into powder by using a nitrogen atomization mode. And the qualified powder components are subjected to qualification test, and the qualified powder components meet the requirements of the mass percentage ranges of all the components in the nitrogen-containing stainless steel.
The nitrogen-containing stainless steel powder is processed and formed through an additive manufacturing process, and nitrogen is used as a protective atmosphere in the additive manufacturing process. Different from stainless steel such as 316L and the like which adopts argon as protective atmosphere, the additive manufacturing process of the stainless steel of the invention adopts nitrogen as protective atmosphere, which can play a role in inhibiting nitrogen element volatilization and improving the density of stainless steel parts.
Further, the additive manufacturing process takes nitrogen as a protective atmosphere.
Further, the smelting of the induction furnace is vacuum smelting or nitrogen protection smelting.
Further, the cast ingot is cooled and formed by a metal mold.
The metal mold can improve the cooling rate of the cast ingot and play a role in inhibiting component segregation. Optionally, the surface of the ingot is cleaned to improve the stability of the alloy composition, and the cleaning mode comprises grinding, lathe machining and milling machine machining.
Further, the area of the cross section vertical to the length direction of the ingot is not more than 200 square centimeters.
The restriction of the cross-sectional size can play a role in suppressing the segregation of components.
In a third aspect, the embodiment of the invention provides application of the nitrogen-containing stainless steel or an ingot prepared by the preparation method in additive manufacturing.
Example 1
The nitrogen-containing stainless steel ingot is prepared by adopting an induction furnace smelting mode, and the cross-sectional area vertical to the length direction of the ingot is about 80 square centimeters. The smelting mode of the induction furnace is vacuum smelting, and the cast ingot is cooled and formed by adopting a metal mold. And cleaning the surface of the cast ingot in a cleaning mode including grinding and lathe processing. The ingot is prepared into powder by using a nitrogen atomization mode. And the powder components are subjected to qualification test, wherein the mass fraction of each component in the powder is 0.04% of C, 0.4% of Si, 6.8% of Mn, 10.3% of Ni, 18.7% of Cr, 1.4% of Mo, 0.09% of N, 0.29% of V, 0.32% of Nb and the balance of Fe; the powder composition meets the technical requirements of the nitrogen-containing stainless steel powder of the invention. The nitrogen-containing stainless steel powder is processed and formed through an additive manufacturing process, and nitrogen is used as a protective atmosphere in the additive manufacturing process. Referring to fig. 1, the tensile stress-strain curve of the additive manufacturing sample shows that the alloy is excellent in tensile strength and plasticity.
Example 2
The main difference between the present example and example 1 is that the mass fraction of each component in the powder is C0.08%, Si 0.2%, mn 6.9%, Ni 10.8%, Cr 18.2%, Mo 1.0%, N0.17%, V0.26%, Nb 0.34%, and the balance Fe, and the powder components meet the technical requirements of the nitrogen-containing stainless steel powder of the present invention. Referring to fig. 2, the tensile stress-strain curve of the additive manufacturing sample shows that the alloy is excellent in tensile strength and plasticity.
Example 3
The main difference between the present example and example 1 is that the mass fraction of each component in the powder is C0.07%, Si 0.3% mn7.4%, Ni 10.6%, Cr 18.4%, Mo 1.1%, N0.13%, V0.33%, Nb 0.27%, and the balance Fe, and the powder components meet the technical requirements of the nitrogen-containing stainless steel powder of the present invention. Referring to fig. 3, the tensile stress-strain curve of the additive manufacturing sample shows that the alloy is excellent in tensile strength and plasticity. The impact displacement-impact power curve of the additive manufacturing sample is shown in figure 4 (impact experiment gap-KV 2), and the impact toughness of the alloy is excellent.
Example 4
The nitrogen-containing stainless steel takes iron as a base element and comprises the following alloy elements in percentage by mass: 0.02% of C, 0.2% of Si, 6.5% of Mn, 10% of Ni, 18% of Cr, 0.9% of Mo, 0.08% of N, 0.25% of V and 0.25% of Nb.
The sum of the mass fractions of the other impurity elements in the nitrogen-containing stainless steel is not higher than 0.4%.
Example 5
The nitrogen-containing stainless steel takes iron as a base element and comprises the following alloy elements in percentage by mass: 0.09% of C, 0.5% of Si, 7.5% of Mn, 11% of Ni, 19% of Cr, 1.5% of Mo, 0.18% of N, 0.35% of V and 0.35% of Nb.
The sum of the mass fractions of the other impurity elements in the nitrogen-containing stainless steel is not higher than 0.4%.
Comparative example 1
The main difference between this example and example 1 is that the mass fractions of the components in the powder are C0.14%, Si 1.2%, mn7.0%, Ni 12.2% Cr 20.1%, Mo 1.2%, N0.29%, V0.02%, Nb 0.03% and the balance Fe, and the powder components do not meet the specifications of the nitrogen-containing stainless steel powder of the present invention. Referring to fig. 5, the tensile stress-strain curve of the additive manufacturing sample shows that the alloy has good tensile strength and poor plasticity.
Comparative example 2
The main difference between this example and example 1 is that the mass fraction of each component in the powder is C0.01% Si 0.1%, Mn 9%, Ni 11.4%, Cr 15.5%, Mo 0.6% N0.02%, V0.05%, Nb 0.01% and the balance Fe, and the powder components meet the technical requirements of the nitrogen-containing stainless steel powder of the present invention. Referring to fig. 6, the tensile stress-strain curve of the additive manufacturing sample shows that the tensile strength and plasticity of the alloy are insufficient.
Therefore, compared with the prior art, the embodiment of the invention has the following advantages and beneficial effects:
1. the N element with low cost is used as one of main alloy elements for stabilizing austenite, so that the use amount of the Ni element is reduced, and the economy of raw materials is improved; the additive manufacturing process adopts nitrogen as protective atmosphere, and has better process economy compared with argon protection.
2. By reasonably matching nitrogen-fixing elements, the problems of nitrogen burning loss and air holes in the existing nitrogen-containing stainless steel additive manufacturing process are solved.
3. The nitrogen-containing stainless steel and the part prepared by the preparation method provided by the embodiment of the invention have excellent tensile strength, tensile plasticity and impact toughness.
Therefore, the nitrogen-containing stainless steel powder provided by the embodiment of the invention has the characteristics of low cost and excellent stability of an additive manufacturing process; the preparation method of the nitrogen-containing stainless steel part has the characteristics of short flow and excellent mechanical property; the invention has important significance for the development of new materials and new processes for additive manufacturing.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The nitrogen-containing stainless steel takes iron as a base element, and is characterized by comprising the following alloy elements in percentage by mass: 0.02-0.09% of C, 0.2-0.5% of Si, 6.5-7.5% of Mn, 10-11% of Ni, 18-19% of Cr, 0.9-1.5% of Mo, 0.08-0.18% of N, 0.25-0.35% of V and 0.25-0.35% of Nb.
2. The nitrogen-containing stainless steel according to claim 1, wherein the sum of the mass fractions of the remaining impurity elements in the nitrogen-containing stainless steel is not more than 0.4%.
3. The nitrogen-containing stainless steel of claim 1, wherein the nitrogen-containing stainless steel is in a powder form.
4. A method of making a nitrogen-containing stainless steel component, comprising:
preparing the nitrogen-containing stainless steel of any one of claims 1-3 into an ingot by means of induction furnace smelting.
5. The method of manufacturing a nitrogen-containing stainless steel member according to claim 4, further comprising:
preparing the ingot into powder by adopting a nitrogen atomization mode;
and (3) processing and shaping the powder by adopting an additive manufacturing process.
6. The method of making a nitrogen-containing stainless steel component of claim 5, wherein the additive manufacturing process uses nitrogen as a protective atmosphere.
7. The method for producing a nitrogen-containing stainless steel member according to any one of claims 4 to 6, wherein the induction furnace melting is vacuum melting or nitrogen blanket melting.
8. The method for producing a nitrogen-containing stainless steel member according to claim 7, wherein the ingot is cooled and formed by a metal mold.
9. The method of producing a nitrogen-containing stainless steel member according to claim 4, wherein the cross-sectional area perpendicular to the length direction of the ingot is not more than 200 cm.
10. Use of a nitrogen-containing stainless steel according to any one of claims 1 to 3 or an ingot produced by a method according to any one of claims 4 to 9 in additive manufacturing.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1526032A (en) * | 2002-05-08 | 2004-09-01 | 新日本制铁株式会社 | High strength stainless steel wire excellent in ductility-toughness and modulus of rigidity and method for production thereof |
| CN108339983A (en) * | 2018-04-02 | 2018-07-31 | 广州恒尚科技有限公司 | A kind of selective laser melting (SLM) molding method of 304/304L stainless steels |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1526032A (en) * | 2002-05-08 | 2004-09-01 | 新日本制铁株式会社 | High strength stainless steel wire excellent in ductility-toughness and modulus of rigidity and method for production thereof |
| CN108339983A (en) * | 2018-04-02 | 2018-07-31 | 广州恒尚科技有限公司 | A kind of selective laser melting (SLM) molding method of 304/304L stainless steels |
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