WO2002048416A1 - Acier inoxydable a teneur elevee en silicium - Google Patents
Acier inoxydable a teneur elevee en silicium Download PDFInfo
- Publication number
- WO2002048416A1 WO2002048416A1 PCT/JP2000/008877 JP0008877W WO0248416A1 WO 2002048416 A1 WO2002048416 A1 WO 2002048416A1 JP 0008877 W JP0008877 W JP 0008877W WO 0248416 A1 WO0248416 A1 WO 0248416A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- less
- steel
- equivalent
- stainless steel
- strength
- Prior art date
Links
Classifications
-
- 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
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—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
-
- 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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
Definitions
- the present invention relates to a high silicon stainless steel having basic characteristics of excellent corrosion resistance and high strength, and having various characteristics such as fatigue resistance, heat resistance, formability, and workability.
- a typical example of a metal material having excellent corrosion resistance is stainless steel. Although stainless steel is used in a wide range of applications, in recent years, applications that require not only corrosion resistance but also various other material properties as described below are increasing.
- Applications requiring fatigue resistance include, for example, panels, gears, and drive shafts.
- a special application is the core wire of an interdental brush.
- High Cr steels such as stainless steel generally have excellent heat resistance. In addition to this general heat resistance, it is necessary to withstand heat checks (cracks generated due to thermal stress). There are high temperature pairing, die casting dies, glass forming dies, various heating furnace parts, etc.
- Parts such as balls and rollers for bearing devices, supporting plates and rollers for seismic isolation devices and bearing devices, tools such as dies and dies, and materials for pressure-resistant containers require high crushing strength to withstand large loads. You.
- Alloys for thin and complex shapes for precision fabrication products need alloys that have a good melt flow during fabrication and are less likely to cause fabrication defects. Examples of such products include golf club heads, screws, impellers, evening bottle blades, pumps, valves, and the like. Also, good flow of molten metal is required to form a smooth and beautiful bead when used as a welding material (wire, rod).
- Stainless steel is originally a corrosion-resistant material, but it is used for semiconductor manufacturing equipment, such as piping and connecting parts, medical equipment, and food processing, for applications that require superior corrosion resistance beyond that required for ordinary stainless steel.
- Equipment When manufacturing semiconductors, high-purity gas or pure water is used. Since these must not be contaminated by substances originating from the piping materials, the piping materials and connecting parts must have extremely good corrosion resistance.
- metal materials are various, and it is often required to combine some of these properties.
- materials for tableting machines (tablet manufacturing equipment) used in the pharmaceutical industry need to have high corrosion resistance and high strength and abrasion resistance to withstand deformation and wear during use.
- materials must also be as inexpensive as possible to reduce equipment manufacturing costs. This is because, in large-scale and mass-produced equipment, material prices account for a large proportion of the total price. However, very few materials can meet all of these requirements.
- a material that has excellent corrosion resistance and is relatively inexpensive is iron (Fe) based stainless steel.
- Fe iron
- high strength and excellent corrosion resistance are properties that conflict with each other, but the following stainless steel alloys having both properties are available.
- Patent No. 619,383 JP-B-46-9536
- Patent No. 661,246 JP-B-46-9536
- Japanese Patent Publication No. 47-9899 and Japanese Patent No. 1,167,791 Japanese Patent Publication No. 57-17070, etc., and are called Silicoloy (registered trademark).
- This steel is an alloy that combines high strength (high hardness) and excellent corrosion resistance by containing a relatively large amount of silicon (Si).
- the steel can also be age hardened by adjusting the chemical composition.
- the present inventor has obtained Patent No. 2,954,922 for a heat treatment method for a steel product with improved aging. However, even the above-mentioned high silicon stainless steel is still insufficient to meet such various demands.
- the above-mentioned piping material for semiconductor manufacturing equipment requires a high degree of cleanliness in the material itself, and an excellent elongation that can be processed into an ultra-fine wire rod in order to manufacture a mesh for netting. Linearity is also required.
- corrosion-resistant metal materials are used not only as forged and rolled products, but also as forged materials (animals), they must also have excellent formability. Disclosure of the invention
- the above-mentioned high silicon stainless steel is a steel having a dual phase structure mainly composed of austenite and ferrite.
- This steel has both high corrosion resistance and high strength due to its high Si content compared to ordinary stainless steel, and also has a good flow of molten metal during fabrication.
- age hardening can be imparted by adjusting the alloy components, so that it is possible to process in a solution-formed low-strength state and then perform aging treatment to increase the strength. You. Almost no product deformation occurs in the aging treatment.
- the present inventor made the present invention for the purpose of further improving the high silicon stainless steel having the excellent basic characteristics to further improve the above various characteristics.
- a specific object of the present invention is to greatly improve the above-mentioned various characteristics (1) to (7) while making use of the basic characteristics of the high silicon stainless steel.
- the present inventor has confirmed that the object of the present invention can be achieved by increasing the cleanliness of high silicon stainless steel.
- the cleanliness of steel means the amount of oxides and sulfide-based inclusions, and steel with few such inclusions is called high-purity steel.
- the steel of the present invention is a high silicon stainless steel having the following chemical composition (% represents mass%).
- V 4% or less
- Rare earth element High silicon stainless steel containing 0.01% or less, the balance being Fe and impurities, and the contents of C, PS, Al, N, 0 and H as impurities as follows.
- Desirable aspects of the above high silicon stainless steel are as follows.
- Fe-based alloy containing 0 to 0.006% of 8 with the balance being Fe and impurities.
- A1 is 0.01% or less
- N nitrogen
- H (hydrogen) is 0.0002% or less
- Mg, Ca and rare earth elements may each contain a residue used as a refining agent in steelmaking in a range of 0.01% or less.
- the content of the main alloy component is adjusted as follows in order to obtain a desired metallographic structure. That is, Cr equivalent (X) is defined by the following formula (1), and Ni equivalent (Y) is defined by the following formula (2), and the X and Y are adjusted so as to satisfy the following formulas (3), (4) and (5). It is.
- Y (Ni equivalent,%) Ni (%) + 30 X C () + 0.5 X Mn (%) + 0.1 X Co (%)
- FIG. 1 is a diagram illustrating the metallographic structure of the high silicon stainless steel of the present invention.
- Figures 2 and 3 are tables showing the chemical composition of the steel used in the test.
- Figures 4, 5, 6, and 7 are tables showing test results.
- FIG. 8 is a diagram schematically showing a crushing test apparatus.
- FIG. 9 is a diagram for explaining the test method of the stiffness (fluidity).
- Fig. 10 is a side view showing the shape of a test piece for checking heat resistance. (Partial cross section). BEST MODE FOR CARRYING OUT THE INVENTION
- the steel of the present invention contains 2 to 8% of 31, 8 to 25% of Cr and 4 to 16% of Ni as essential components.
- Si is not only a main element that gives strength to the steel of the present invention, but also imparts heat resistance, oxidation resistance, corrosion resistance, and high-temperature softening resistance. It is also an element that lowers the melting point of steel, increases fluidity and improves formability. If the content is less than 2%, the effect of improving the above properties is not sufficient. On the other hand, since Si is a strong ferrite-forming element, excessive addition causes the basic microstructure balance of the steel of the present invention to be lost. The upper limit was set to 5% in consideration of the effect of the above equation on the Cr equivalent. A more desirable Si content is 2.5 to 4.5%.
- Ni not only imparts corrosion resistance, oxidation resistance and heat resistance to steel, but also balances Cr with the steel matrix to achieve the desired structure (a two-phase structure of ferrite and o-stenite or a mixture of these and martensite). It is an element that is effective in maintaining a three-phase organization. To obtain these effects, the content of 4% or more is necessary. However, if it exceeds 16%, the austenite phase will increase too much due to the increase in Ni equivalent, and the mechanical properties will deteriorate, and Cost is lost. Desirable Ni content is 5 to: 15%.
- the components that the steel of the present invention may contain, that is, the optional components are Mn, Cu, Co, Mo, Nb, Ta, Ti, W, V, B, Mg , Ca and rare earth elements (REM). These may be added alone or in combination of two or more. Each content is arbitrary as long as it is equal to or less than the above upper limit. Of course, the content of the component not added is substantially zero or the level of impurities.
- the function and effect of the above-mentioned optional components will be described together with desirable contents.
- Mn acts as a deoxidizer for steel and is also an austenite forming element.
- Precipitation-hardened stainless steel does not significantly affect the mechanical properties, but helps to refine and stabilize the metallographic structure. However, if it exceeds 5%, the corrosion resistance decreases, and the Ni equivalent becomes excessive, making it difficult to obtain the required mechanical properties. Desirable content is 0.05-5%.
- Cu is an element that contributes to precipitation hardening while improving corrosion resistance (particularly acid resistance).
- Cu exceeding 4% impairs the hot workability of steel, so the upper limit is 4%.
- the content is desirably 0.5 to 4%.
- Mo improves the anti-cleave property by increasing the high-temperature strength as well as the corrosion resistance of steel, and also contributes to the improvement of toughness and wear resistance. To obtain these effects sufficiently, the content of 0.2% or more is desirable. On the other hand, since Mo is a ferrite-forming element, if its content increases, the Cr equivalent will increase, making it difficult to secure a desirable organization. Mo is also an expensive element. Therefore, the content of Mo should be less than 4%.
- Nb, Ta and Ti all contribute to the strengthening of steel by precipitation hardening.
- Nb has the effect of increasing the depth of cure during aging. Therefore, when used as a material for thick-walled products, it helps to shorten the aging time.
- Ta has the same effect as Nb, Synergistic effect contributes to high hardness without impairing corrosion resistance.
- ⁇ contributes to improvement of heat resistance and corrosion resistance in addition to the above-mentioned precipitation hardening action.
- Co is an austenite formation promoting element as shown in the above formula (1). Therefore, it has the effect of supplementing the action of.
- Co enhances age hardening properties to improve product strength (hardness) and contributes to improved corrosion resistance. These effects become remarkable from 0.5%, and the effect increases as the content increases.
- the content is excessive, the Ni equivalent becomes large and it becomes difficult to secure a desirable structure. Since Co is an expensive component, the upper limit was set to 8%.
- the desirable content of Co when added is 0.5 to 6%.
- W increases the high-temperature strength of steel and improves creep resistance. Since the same atomic% as Mo has almost the same effect, it can be used instead of Mo or together with Mo. However, even if added, it may be up to 4%. Considering that W is an expensive element, the desirable content is 1.5% or less.
- V enhances precipitation hardening and helps to increase strength. It also increases high-temperature strength and improves creep resistance. However, excessive V reduces the toughness of the steel, so its content should be kept below 4%. The desired content is no more than 1.5%.
- B has effects such as improvement of hot workability and improvement of high temperature toughness. However, if B is excessive, hot workability is impaired, so even if it is added, its content must be suppressed to 0.01% or less. Desirable inclusion of B Its weight is less than 0.006%.
- Rare earth elements such as Mg, Ca and Y and Ce can be used as a deoxidizing agent, a desulfurizing agent, etc. in the Shinnin process. These elements also have the effect of improving the hot workability of the steel, but if they remain in the steel as oxide-based inclusions, they will impair the drawability of the steel. Therefore, even when these are added, the residual amount should be kept below 0.01%.
- the greatest feature of the steel of the present invention is that the content of impurity elements is low, and since all of the following seven elements are below the specified amount, the steel with the above-mentioned various properties is totally excellent. Become.
- C is an element that increases the strength of steel, and ordinary high-strength steels must contain a certain amount of C.
- the inclusion of C is not essential. Rather, C is an element that lowers the toughness of the steel of the present invention and also has an adverse effect on workability, oxidation resistance and corrosion resistance. Further, C is a component that greatly affects the Ni equivalent, as shown in the above formula (1), and if present in excess, it becomes difficult to balance the content with other components. Therefore, the content of C should be as small as possible.
- C is suppressed to 0.04% or less. This is the upper limit, but it is desirable to keep it below 0.015% especially for non-aging steel. With the current refining technology, it is possible to produce ultra-low carbon steel of 0.01% or less.
- P is a typical harmful impurity in stainless steel. Segregates in steel and causes deterioration of mechanical properties, workability and corrosion resistance. Therefore, Should be as low as 0.03% or less. It is desirable that the content be 0.015% or less, more preferably 0.010% or less.
- S is a harmful element that reduces hot workability by causing red hot embrittlement of steel.
- sulfide-based inclusions are formed, impairing the cleanliness of the steel and deteriorating not only mechanical properties (fatigue strength, crushing strength, etc.) but also corrosion resistance and heat resistance (heat check resistance). Therefore, it should be kept below 0.02%, preferably below 0.01%. In particular, it is desirable to keep S to 0.005% or less in steels that are drawn to a fine wire with a wire diameter of 0.1 mm or less.
- A1 0.03% or less (preferably 0.01% or less)
- the allowable upper limit of the A1 content is set to 0.03%.
- N 0.05% or less (preferably 0.03% or less)
- N is an austenite-forming element and may be added positively in stainless steel to stabilize the austenite phase.
- the steel of the present invention also requires excellent formability, the upper limit of N is restricted as an impurity.
- N exceeding 0.05% deteriorates the flowability of molten steel and causes the formation of air bubbles, thereby making it difficult to produce thin-wall precision manufactured products.
- it also causes toughness degradation.
- the N content is desirably as low as 0.03% or less.
- Oxide-based inclusions reduce the deformability of steel, causing wire breakage, especially in wire drawing, making it impossible to produce ultrafine wires.
- the presence of inclusions causes deterioration of the surface cleanliness of the steel product and a decrease in the corrosion resistance, fatigue strength, crushing strength, heat check and heat resistance. Further, in the production of such thin-walled products, the flow of the molten metal may be deteriorated. Therefore, the content of 0 should be as low as possible. 0.005% is the upper limit, but it is desirable to keep it below 0.002%.
- H is an extremely harmful component that forms an interstitial solid solution in matrix ferrite and austenite and causes so-called hydrogen embrittlement.
- the toughness, fatigue strength, and heat check resistance are reduced, and the formability is also adversely affected. Therefore, the H content should be kept as low as possible. 0.0003% (3ppm) is the upper limit, but it is more desirable to keep it below 0.0002% (2ppm).
- FIG. 1 is a diagram showing a metal structure when subjected to a solution treatment by cooling with water from 1050 ° C.
- the horizontal axis (X-axis) is Cr equivalent (Creq)
- the vertical axis (Y-axis) is Ni equivalent (Nieq).
- Cr equivalent and Ni equivalent are calculated by the following formulas (1) and (2), respectively.
- Straight line d Y -5.00 + 0.50 X
- line a is the austenitic area or the austenitic + ferrite area.
- the straight line b is the martensite area or martensite + ferrite area.
- the straight line c shows the condition of 5% ferrite, and the straight line d shows the condition of 80% ferrite.
- the matrix structure of the steel of the present invention is desirably a two-phase structure composed of 5-80% ferrite and the balance of austenite, or a three-phase structure in which a small amount of martensite is mixed.
- the organization is the shaded area in Fig. 1. Therefore, it can be seen that the above-described desirable structure can be obtained by selecting a chemical composition that satisfies the following three equations at the same time.
- FIG. 1 Although the structure in FIG. 1 is in the solution state, the structure of the matrix after aging treatment is not much different from the solution state. Due to the aging treatment, various intermetallic compounds are finely precipitated in the matrix to increase the strength (high hardness). However, minor changes in the organization of the matrix itself are acceptable.
- the regions where both mechanical properties and corrosion resistance are good are the straight lines b, c and And a region surrounded by d, ie, a two-phase structure of 5 to 80% ferrite and austenite or a three-phase region in which martensite is mixed.
- the steel of the present invention can be manufactured by an existing stainless steel smelting method.
- an existing stainless steel smelting method for example, steel melted in an electric furnace or a converter is remelted in a vacuum induction furnace, remelted in a vacuum arc furnace (VAR method). ), Etc. to remove impurity elements.
- Refining methods such as an electron beam melting method in a vacuum and an electroslag method (ESR method) in a non-oxidizing atmosphere can also be used. In any case, it is necessary to set the melting and subsequent processing conditions so that all the impurities from C (carbon) to H (hydrogen) are below the predetermined values.
- Age-hardenable steel may be used as it is as a solution, or after being subjected to a solution treatment, may be subjected to an aging treatment to increase the strength.
- As solution Since it is easy to work with low strength (low hardness), it is possible to perform the forming process in the solution state and then apply aging treatment to increase the strength to the target strength. Aging treatment is advantageous for the production of products that require high dimensional accuracy because it does not cause deformation of the product.
- the solution treatment is performed by heating at 950 to 1150 ° C and then cooling. If the temperature is lower than 950 ° C, the solution is insufficient and the amount of residual steel increases, making it difficult to increase the strength. On the other hand, at a high temperature exceeding 1150 ° C, the crystal grains become coarse and the toughness decreases.
- the appropriate heating time is 1-2 hours per inch of product thickness.
- the cooling method it is sufficient to secure a cooling rate at which a solution state can be obtained according to the product size (wall thickness). For example, methods such as water cooling, oil cooling, and air cooling can be adopted.
- the product after the solution treatment has a two-phase structure of fine austenite and ferrite, or a three-phase structure containing further martensite, and has a hardness of about HRC 34 to 38. Therefore, it is easy to perform machining in this state of solution treatment to adjust the shape of the component (perform finishing).
- the aging treatment is performed at 200 to 700 ° C. At low temperatures below 200 ° C or at high temperatures above 700 ° C, the desired high hardness is not obtained. Particularly desirable aging temperatures are in the range of 400 to 550 ° C. By processing at this temperature, high hardness of HRC 50 or more can be obtained.
- the processing temperature and processing time can be selected according to the mechanical properties to be given to the product.
- All three types are the same group of steel, of which the symbol “ ⁇ ” indicates a comparative steel with a high impurity level, and the symbol “ ⁇ ” Is
- the steel of the present invention having a high degree of cleanliness with impurities suppressed, and the steel marked with ⁇ are the steels of the present invention with an ultra-high degree of cleanliness further reduced in impurity levels.
- Steel Nos. 34, 35 and 36 are existing steels (sales steels) and correspond to JIS SUS304, SUS630 and SUS420J2 respectively.
- the ingot of the above test material was hot forged into a round bar having a diameter of 20 mm, and the round bar was subjected to the following solution treatment. Further, as for the precipitation hardening steel shown in FIG. 2, one prepared only by the following heat treatment and another prepared by performing the aging treatment in the second treatment after the first treatment were prepared.
- heat treatment of steel No. 34 is only the above 1; heat treatment of steel No. 35 is the same as above 1 and aging treatment of ⁇ 480 ° C X 6 hours air cooling ''; heat treatment of steel No. 36 is quenched under the conditions 1 above And “200 ° CX 3 hours air cooling” tempering.
- test specimen was cut into a round bar.
- the specimen was cut into a tensile test specimen of JIS No. 14A, and a tensile test was conducted at room temperature using a testing machine conforming to JIS B 7721 to examine the tensile strength and elongation.
- test material round bar was cut into a diameter of 20 mm and a thickness of 10 mm, polished to a mirror surface, and the hardness was measured with a Rockwell hardness tester.
- test specimen round bar was cut and cut to form a JIS No. 4A V-notched test piece, and the Charpy impact value at room temperature was determined using a testing machine conforming to JIS B 7722.
- Fatigue tests were carried out under the following conditions to determine the fatigue limit of 107 rotation. Testing machine: Ono-type rotary bending fatigue testing machine
- Test temperature room temperature (in air)
- a sphere having a diameter of 25.4 mm (1 inch) was cut out from the test sample round bar, and the crushing strength was measured using the apparatus shown in FIG.
- the apparatus shown in FIG. 8 there are a fixed tool 2 and a movable tool 3 having a conical depression in a crushing cylinder 1, and the movable tool 3 moves up and down by hydraulic pressure.
- Two specimens (steel balls) 4 were inserted into the crushing cylinder, and the movable tool 3 was used to reduce the load, and the load when the specimen was crushed was measured.
- the fluidity (fluidity of molten steel) was examined.
- the groove 6 is a rectangular section having a width of 8 mm and a depth of 7 mm, and has a total length of lm.
- a certain amount of molten steel at 1600 ° C was injected from the central gate 7 into this groove, and the molten metal flow characteristics of each steel were evaluated based on the length reached until solidification. The longer this length is, the better the flow of hot water is, and the better the formability is determined.
- test sample round bar was drawn to a wire diameter of 5.0 mm by hot rolling and cold drawing, and then cold drawn by a diamond die while repeating heat treatment.
- the drawability was evaluated by the critical diameter at which no further drawing could be performed due to the breaking. The smaller this value (the critical wire diameter), the better the wire drawability.
- This test was carried out for the test materials of steel No .;! ⁇ 3 in Fig. 2 and steel Nos. 22 to 30 and 34 in Fig. 3 (all in the same solution treatment as in 1). I went there.
- test piece 8 having the shape (abacus ball shape) shown in Fig. 10 cut out from the test material round bar was polished, and the following heating and cooling cycles were repeated 1000 times, and then the state of crack generation was examined.
- Heating Rapidly heat from room temperature to 750 ° C in 6 seconds, hold at 750 ° C for 2 seconds.
- Cooling Water cooling to 25 ° C in 3 seconds.
- the heat check resistance was evaluated based on the number of cracks having a depth of 50 // m or more.
- test material round bar was cut and cut into a diameter of 15 mm and a thickness of 10 mm, and mirror-polished to obtain a test piece.
- the surface was degreased and washed, immersed in 35% concentrated hydrochloric acid (25 ° C) for 8 hours, washed and dried, and weighed.
- the corrosion rate (g / mm 2 .hr) was determined from the weight difference before and after the test.
- Fig. 4 shows the results of a test of the precipitation hardening type steel of Fig. 3 in the state of solution treatment (without aging treatment) (however, excluding the formability test).
- the high cleanliness steel (marked with ⁇ ) and the ultra clean steel (marked with ⁇ ) of the present invention have strength, elongation and toughness (marked with ⁇ ).
- Characteristics of impact fatigue strength, stiffness, heat-resistant property and corrosion resistance are all superior to comparative steel.
- Ultra-clean steels with particularly low impurities have a remarkable effect on these improvements.
- Fig. 5 shows the test results for the test specimens after solution hardening of the precipitation hardening type steel of Fig. 2 and further aging treatment.
- the difference between the hardness after aging treatment and the hardness as solution is referred to as the “hardness difference”. Is filled in. The greater this difference, the greater the precipitation hardenability.
- Fig. 6 shows the test results for the non-precipitated steel of the present invention (steel Nos. 22 to 33) and the conventional steel (steel Nos. 34 to 36).
- ⁇ .35 is a precipitation hardened stainless steel, so the test ⁇ .62 used aging-treated steel as the test material, and the others treated only for solution treatment ( ⁇ .63 was quenched and tempered). ).
- the properties of the high cleanliness steel and the ultra cleanliness steel of the present invention greatly exceed the comparative steel.
- Fig. 7 shows the results of wire drawing tests for steel Nos. 1 to 3 in Fig. 2 and steel Nos. 22 to 30 and 34 in Fig. 3. All were as-solution steels. All of the steels of the present invention can be drawn up to a diameter of 20 to 30 / m, while the wire drawing limit of the comparative steel is 40 m in each case. It can be seen that it has drawability comparable to SUS304 (steel ⁇ .34), which has excellent drawability. Industrial applicability
- the high silicon stainless steel of the present invention has many excellent properties as shown in the examples. Therefore, it can be used not only for conventional stainless steel, but also for new applications that conventional stainless steel cannot handle. In particular, it is suitable for applications that require multiple properties such as corrosion resistance, heat resistance, abrasion resistance, and fatigue resistance at the same time as exemplified at the beginning. Also suitable for manufacturing.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/450,414 US20040042926A1 (en) | 2000-12-14 | 2000-12-14 | High-silicon stainless |
PCT/JP2000/008877 WO2002048416A1 (fr) | 2000-12-14 | 2000-12-14 | Acier inoxydable a teneur elevee en silicium |
JP2002550127A JP4176471B2 (ja) | 2000-12-14 | 2000-12-14 | 高珪素ステンレス鋼 |
EP00981731A EP1352980A4 (en) | 2000-12-14 | 2000-12-14 | SILICON RICH STAINLESS STEEL |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2000/008877 WO2002048416A1 (fr) | 2000-12-14 | 2000-12-14 | Acier inoxydable a teneur elevee en silicium |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002048416A1 true WO2002048416A1 (fr) | 2002-06-20 |
Family
ID=11736801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/008877 WO2002048416A1 (fr) | 2000-12-14 | 2000-12-14 | Acier inoxydable a teneur elevee en silicium |
Country Status (4)
Country | Link |
---|---|
US (1) | US20040042926A1 (ja) |
EP (1) | EP1352980A4 (ja) |
JP (1) | JP4176471B2 (ja) |
WO (1) | WO2002048416A1 (ja) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005307943A (ja) * | 2004-04-26 | 2005-11-04 | Hirotoshi Baba | 羽根車 |
JP2010046267A (ja) * | 2008-08-21 | 2010-03-04 | Seiko Instruments Inc | ゴルフクラブヘッド、そのフェース部及びその製造方法 |
US8097097B2 (en) | 2005-03-10 | 2012-01-17 | Hitachi Metals Ltd. | Stainless steel having a high hardness and excellent mirror-finished surface property, and method of producing the same |
JP2018094620A (ja) * | 2016-12-16 | 2018-06-21 | 日新製鋼株式会社 | 拡散接合治具用ステンレス鋼材 |
CN112251681A (zh) * | 2020-09-29 | 2021-01-22 | 中国科学院金属研究所 | 一种超高强度纳米晶40Cr16Co4W2Mo不锈钢及其制备方法 |
JP2023071634A (ja) * | 2021-11-11 | 2023-05-23 | 日本シリコロイ工業株式会社 | 低温用途、特に、液体水素用の成形体 |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3955811B2 (ja) * | 2002-11-05 | 2007-08-08 | Sriスポーツ株式会社 | ゴルフクラブヘッド |
CN1252304C (zh) * | 2003-11-27 | 2006-04-19 | 林栋樑 | 高硅钢及其制备方法 |
SE531483C2 (sv) * | 2005-12-07 | 2009-04-21 | Sandvik Intellectual Property | Sträng för musikinstrument innefattande utskiljningshärdande rostfritt stål |
AT502397B1 (de) * | 2006-03-20 | 2007-03-15 | Boehler Edelstahl | Legierung für wälzlager |
JP5072285B2 (ja) * | 2006-08-08 | 2012-11-14 | 新日鐵住金ステンレス株式会社 | 二相ステンレス鋼 |
JPWO2009107475A1 (ja) * | 2008-02-29 | 2011-06-30 | 独立行政法人産業技術総合研究所 | オーステナイト系ステンレス鋼、及びその水素除去方法 |
FR2951196B1 (fr) * | 2009-10-12 | 2011-11-25 | Snecma | Degazage d'aciers martensitiques inoxydables avant refusion sous laitier |
CN103298965B (zh) | 2011-01-27 | 2016-09-28 | 新日铁住金不锈钢株式会社 | 合金元素节减型双相不锈钢热轧钢材、具备双相不锈钢作为夹层材料的包层钢板及它们的制造方法 |
WO2013018629A1 (ja) * | 2011-07-29 | 2013-02-07 | 新日鐵住金株式会社 | 高Siオーステナイト系ステンレス鋼の製造方法 |
SI2737961T1 (sl) * | 2011-07-29 | 2017-05-31 | Nippon Steel & Sumitomo Metal Corporation | Metoda za izdelavo avstenitnega nerjavnega jekla |
US20140175027A1 (en) * | 2012-12-21 | 2014-06-26 | United Technologies Corporation | Fuel system with electrically heated filter screen |
US9695875B2 (en) | 2013-07-17 | 2017-07-04 | Roller Bearing Company Of America, Inc. | Top drive bearing for use in a top drive system, and made of non-vacuum arc remelted steel configured to achieve an extended life cycle at least equivalent to a life factor of three for a vacuum arc remelted steel |
US10822679B2 (en) * | 2014-10-01 | 2020-11-03 | Nippon Steel Corporation | Stainless steel product |
JP2016160454A (ja) | 2015-02-27 | 2016-09-05 | 日本シリコロイ工業株式会社 | レーザー焼結積層方法、熱処理方法、金属粉末、及び、造形品 |
DE102016215709A1 (de) * | 2015-08-28 | 2017-03-02 | Tsubakimoto Chain Co. | Kettenkomponente und Kette |
JP6376178B2 (ja) * | 2016-07-06 | 2018-08-22 | セイコーエプソン株式会社 | 歯車、減速装置、ロボットおよび移動体 |
JP6376179B2 (ja) * | 2016-07-06 | 2018-08-22 | セイコーエプソン株式会社 | 粉末冶金用金属粉末、コンパウンド、造粒粉末および焼結体 |
DE102016114533A1 (de) * | 2016-08-05 | 2018-02-08 | Flowserve Flow Control Gmbh | Eisenbasierte Legierung zur Herstellung thermisch gespritzter Verschleißschutzschichten |
JP7128818B2 (ja) | 2016-12-19 | 2022-08-31 | アビオメド インコーポレイテッド | 受動的パージシステムを備えた心臓ポンプ |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0434877A1 (en) * | 1989-12-21 | 1991-07-03 | Paxlea Limited | A computer system for portfolio management investment functions |
JPH09302446A (ja) * | 1996-05-10 | 1997-11-25 | Daido Steel Co Ltd | 二相ステンレス鋼 |
JPH09316602A (ja) * | 1996-05-30 | 1997-12-09 | Sumitomo Metal Mining Co Ltd | 高強度、高耐食性2相ステンレス鋳鋼 |
JPH11211046A (ja) * | 1998-01-26 | 1999-08-06 | Nisshin Steel Co Ltd | 廃棄物焼却炉 |
JPH11256308A (ja) * | 1998-03-12 | 1999-09-21 | Sumikin Stainless Kokan Kk | ステンレス鋼管内面の被膜形成方法 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2750283A (en) * | 1953-05-27 | 1956-06-12 | Armco Steel Corp | Stainless steels containing boron |
US4002510A (en) * | 1975-05-01 | 1977-01-11 | United States Steel Corporation | Stainless steel immune to stress-corrosion cracking |
JPS5456018A (en) * | 1977-10-12 | 1979-05-04 | Sumitomo Metal Ind Ltd | Austenitic steel with superior oxidation resistance for high temperature use |
JPS6033342A (ja) * | 1983-08-05 | 1985-02-20 | Sumitomo Metal Ind Ltd | 耐硝酸性2相ステンレス鋼 |
JPS60177139A (ja) * | 1984-02-23 | 1985-09-11 | Daido Steel Co Ltd | 超清浄鋼の製造方法 |
JP2530231B2 (ja) * | 1989-12-20 | 1996-09-04 | 日新製鋼株式会社 | 耐熱用オ―ステナイト系ステンレス鋼 |
JPH0551633A (ja) * | 1991-08-27 | 1993-03-02 | Nippon Steel Corp | 高Si含有オーステナイト系ステンレス鋼の製造方法 |
JPH06287635A (ja) * | 1993-03-31 | 1994-10-11 | Nisshin Steel Co Ltd | 延性に優れ溶接軟化のない高耐力・高強度ステンレス鋼材の製造方法 |
JP3384887B2 (ja) * | 1994-09-08 | 2003-03-10 | 日新製鋼株式会社 | 強度及び捩り特性に優れたバネ用析出硬化型ステンレス鋼 |
JPH08134596A (ja) * | 1994-11-02 | 1996-05-28 | Nippon Steel Corp | 耐応力腐食割れ特性に優れた高強度ステンレス鋼板 |
JPH09256110A (ja) * | 1996-03-18 | 1997-09-30 | Kubota Corp | ドリル加工性にすぐれた高靱性・高腐蝕疲労強度二相ステンレス鋼 |
JP3596234B2 (ja) * | 1996-05-29 | 2004-12-02 | 住友金属工業株式会社 | オゾン含有水用ステンレス鋼材およびその製造方法 |
JP2954922B1 (ja) * | 1998-04-07 | 1999-09-27 | 日本シリコロイ工業株式会社 | 析出硬化型高珪素鋼製品の熱処理方法 |
JP2001059141A (ja) * | 1999-08-18 | 2001-03-06 | Sumitomo Metal Ind Ltd | オーステナイト系ステンレス鋼および自動車排気系部品 |
JP4127447B2 (ja) * | 1999-08-26 | 2008-07-30 | 日新製鋼株式会社 | 耐高温腐食性に優れた焼却炉体および焼却炉付帯設備 |
JP3357863B2 (ja) * | 1999-09-29 | 2002-12-16 | 呉羽製鋼株式会社 | 析出硬化型ステンレス鋼およびその製品の製造方法 |
-
2000
- 2000-12-14 EP EP00981731A patent/EP1352980A4/en not_active Withdrawn
- 2000-12-14 US US10/450,414 patent/US20040042926A1/en not_active Abandoned
- 2000-12-14 WO PCT/JP2000/008877 patent/WO2002048416A1/ja active Application Filing
- 2000-12-14 JP JP2002550127A patent/JP4176471B2/ja not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0434877A1 (en) * | 1989-12-21 | 1991-07-03 | Paxlea Limited | A computer system for portfolio management investment functions |
JPH09302446A (ja) * | 1996-05-10 | 1997-11-25 | Daido Steel Co Ltd | 二相ステンレス鋼 |
JPH09316602A (ja) * | 1996-05-30 | 1997-12-09 | Sumitomo Metal Mining Co Ltd | 高強度、高耐食性2相ステンレス鋳鋼 |
JPH11211046A (ja) * | 1998-01-26 | 1999-08-06 | Nisshin Steel Co Ltd | 廃棄物焼却炉 |
JPH11256308A (ja) * | 1998-03-12 | 1999-09-21 | Sumikin Stainless Kokan Kk | ステンレス鋼管内面の被膜形成方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1352980A4 * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005307943A (ja) * | 2004-04-26 | 2005-11-04 | Hirotoshi Baba | 羽根車 |
US8097097B2 (en) | 2005-03-10 | 2012-01-17 | Hitachi Metals Ltd. | Stainless steel having a high hardness and excellent mirror-finished surface property, and method of producing the same |
JP2010046267A (ja) * | 2008-08-21 | 2010-03-04 | Seiko Instruments Inc | ゴルフクラブヘッド、そのフェース部及びその製造方法 |
JP2018094620A (ja) * | 2016-12-16 | 2018-06-21 | 日新製鋼株式会社 | 拡散接合治具用ステンレス鋼材 |
JP7033847B2 (ja) | 2016-12-16 | 2022-03-11 | 日鉄ステンレス株式会社 | 離型部材 |
CN112251681A (zh) * | 2020-09-29 | 2021-01-22 | 中国科学院金属研究所 | 一种超高强度纳米晶40Cr16Co4W2Mo不锈钢及其制备方法 |
CN112251681B (zh) * | 2020-09-29 | 2022-03-18 | 中国科学院金属研究所 | 一种超高强度纳米晶40Cr16Co4W2Mo不锈钢及其制备方法 |
JP2023071634A (ja) * | 2021-11-11 | 2023-05-23 | 日本シリコロイ工業株式会社 | 低温用途、特に、液体水素用の成形体 |
JP7335017B2 (ja) | 2021-11-11 | 2023-08-29 | 日本シリコロイ工業株式会社 | 低温用途、特に、液体水素用の成形体 |
Also Published As
Publication number | Publication date |
---|---|
US20040042926A1 (en) | 2004-03-04 |
EP1352980A1 (en) | 2003-10-15 |
EP1352980A4 (en) | 2004-11-17 |
JPWO2002048416A1 (ja) | 2004-04-15 |
JP4176471B2 (ja) | 2008-11-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2002048416A1 (fr) | Acier inoxydable a teneur elevee en silicium | |
JP6302722B2 (ja) | ばね疲労特性に優れた高強度複相ステンレス鋼線材、及びその製造方法、ならびにばね疲労特性に優れた高強度複相ステンレス鋼線 | |
US8043446B2 (en) | High manganese duplex stainless steel having superior hot workabilities and method manufacturing thereof | |
KR101600251B1 (ko) | 고강도 복상 스테인리스 강선재, 고강도 복상 스테인리스 강선과 그 제조 방법 및 스프링 부품 | |
EP2804962B1 (en) | Method for manufacturing an austenitic stainless steel product | |
EP2881482A1 (en) | Wear resistant steel plate and manufacturing process therefor | |
US8017071B2 (en) | Corrosion-resistant, cold-formable, machinable, high strength, martensitic stainless steel | |
EP3026138A1 (en) | High-strength steel material for oil well use, and oil well pipe | |
WO2006109664A1 (ja) | フェライト系耐熱鋼 | |
EP2410068A1 (en) | Duplex stainless steel plate having excellent press moldability | |
JP6126881B2 (ja) | ねじり加工性に優れるステンレス鋼線とその製造方法、並びに、ステンレス鋼線材とその製造方法 | |
JP5171197B2 (ja) | 冷間鍛造性に優れた高強度・高耐食ボルト用2相ステンレス鋼線材、鋼線およびボルト並びにその製造方法 | |
EP3034642B1 (en) | Martensitic stainless steel having excellent wear resistance and corrosion resistance, and method for producing same | |
JP6776136B2 (ja) | 耐熱ボルト用二相ステンレス鋼線、および、該二相ステンレス鋼線を用いた耐熱ボルト部品 | |
JP6772076B2 (ja) | 非磁性オーステナイト系ステンレス鋼板および非磁性部材の製造方法 | |
JP5240418B2 (ja) | 耐食性に優れた軸受鋼と、軸受部品及び精密機器部品 | |
CN106563892A (zh) | 一种耐腐蚀奥氏体不锈钢埋弧焊焊丝及其生产方法 | |
CN110343970A (zh) | 一种具较低Mn含量的热轧高强塑积中锰钢及其制备方法 | |
CN110062814A (zh) | 具有优异的强度和延展性的低合金钢板 | |
KR20120036296A (ko) | 내피로성이 우수한 석출 경화형 준안정 오스테나이트계 스테인리스 강선 및 그 제조 방법 | |
JP4998708B2 (ja) | 材質異方性が小さく、耐疲労亀裂伝播特性に優れた鋼材およびその製造方法 | |
CN108220813B (zh) | 一种特超级双相不锈钢及其合金成分优化设计方法 | |
JPWO2018061101A1 (ja) | 鋼 | |
CN115667563B (zh) | 耐疲劳特性优异的析出硬化型马氏体系不锈钢板 | |
CN112853224B (zh) | 一种高强高塑性低碳中锰trip钢及其制备方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): JP US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR |
|
ENP | Entry into the national phase |
Ref country code: JP Ref document number: 2002 550127 Kind code of ref document: A Format of ref document f/p: F |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2000981731 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10450414 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 2000981731 Country of ref document: EP |