TW200417613A - Stell material containing carbides and use of the material - Google Patents

Abstract

The invention concerns a steel material having a good corrosion resistance and following chemical composition in weight-%: 0.7-1.6 (C+N), of which max. 0.8 N, 0.1-2.0 Si, 0.1-1.5 Mn, 14-19 Cr, from traces to max. 2.0 Ni, from traces to max. 2.0 Co, 1.5-4.0 (Mo+W/2), however at least 1.0 Mo and max. 1.0 W, 0.5-3.0 V, <0.1 Nb, from traces to max. 0.2 S, balance iron and impurities in normal amounts. The steel is suitable to be used for construction elements, fixtures in eroding machines, and mould tools.

Description

200417613 Description of the invention: [Technical field to which the invention belongs] The present invention relates to a steel material for building elements intended for use in the environment '* What is needed is good corrosion resistance. More specifically {, the present invention also relates to a steel material, which still has good abrasion resistance under the conditions of hardening and tempering of the steel material. The present invention also relates to a method for using the steel as a building element, particularly as a fixture for a workpiece to be machined in a machine or a spark machining machine, such as a spark cutting machine. 'And the details of this fixing device, or machine fixing device, are ground in a liquid bath in which &amp; mold steel for plastic mold tools and holder steels used as plastic mold tools belong to other can Wanted applications. [PRIOR ART] BACKGROUND OF THE INVENTION Carving cutting (that is, the mold pores of a mold tool) is mostly performed in an erosion machine, such as a spark cutting machine. Due to the electrochemical current generated in the water bath, the water bath gradually becomes very corrosive. The metal fragments entrapped in Guan Cao H can be removed and formed into a slurry 'in the water bath, thereby making the water bath more abrasive. During the cutting operation I, the work piece was fixed by a fixture and its careful parts were repeatedly used. Repeated use has led to the impact of corrosion and abrasion on the environment during the longer period of time. 200417613 In the case of tungsten steel tools of square and clothes, the conventional steel used as the material of the fixing device or the detailed components of the fixing device is worth mentioning by the application: 衣衣 &amp; Registered and / or known trademarks of RIGOR ⑧, STAVANY® d λ Air λ v ® wavax, RAMAX〇, and ELMAX @. As far as the mold steel is concerned, the steels used are RIG0R @, STAVAX @, and ELMAX @. When the steel engineering plastic material is molded, the mold steel is subjected to high tensile force and abrasion, as well as high hardness, good abrasion resistance, corrosion resistance, and sufficient ductility are important characteristics for the mold steel. Similarly, Xiao Lai ’s stent as a plastic mold will also be subject to the same stress ’for the same reason. Yan Hai ’s stent material should also have the characteristics of the products mentioned above. The nominal composition of 忒 steel is shown in Table 以 by weight%. In addition to the elements mentioned in the table, the steel also contains iron, impurities that would normally occur, and additional elements. Table 1 Steel C Si Mn Cr Mo V s RIGOR A 1 T 4 1 r BU 0.2 0.8 5.3 1.1 〇 2 STAVAX 0.38 0.9 0.5 13.6 0 · 3 --- ramax ----- T? T If A Ύ7 0.33 0.3 1.3 16.7 〇. 12 ELMAX 1.7 0.8 0.3 18.0 1.0 3.0 RIG0R® is a steel that has good abrasion resistance but does not have sufficient corrosion resistance. STAVAX⑧ has excellent abrasion resistance, but the delay is not enough. Corrosion resistance is good for the areas of interest. RAMAX (S ^ + has good enough anti-corrosion properties in the field of use, good anti-corrosion silver properties: and I: sufficient abrasion resistance. Ugly has good workability. Two = abrasion However, it does not have enough mass production products that can be too proprietary and still under & metallurgical manufacturing 'and therefore may be recognized as materials., Restrictions' and cannot be defined as a kind of fixed device [Inventive Content] The purpose of the invention disclosure is to provide a kind of steel which is necessary for the above-mentioned fields of application; sufficient steel with ideal characteristics combined. Therefore, the steel first meets some or all of the following standards; strong • excellent "Corrosion resistance", especially when the material is used as a fixed: set, or a detail of the fixed device, 'immersed in erosion machines &quot; such as fire: cutting machines) &quot; good pitting resistance when in the bath ; And although the material is used for the mold X of the plastic mold, and the holder of the mold tool used for the plastic mold, its good pitting resistance. • Sufficient abrasion resistance for this application, such as abrasion resistance comparable to RIGOR0 steel. • A hardness of 52-64HRC, preferably 58-63HRC, or a hardness of about 59-62HRC under hardened and tempered conditions. • Good manufacturing economic benefits. Other characteristics that are also desirable are: • Good workability; 200417613 • Good dimensional stability; • High fatigue resistance; • Good ductility / edge picking; • Compressive strength, which is intended for use in Plastic mold tools, fixtures, and detailed components of fixtures resist plastic deformation. 0 • Versatile, allowing steel to be used in a variety of different fields. The main objectives mentioned above, as well as any or several other wishes, features, can be achieved by the present invention and described in the scope of the attached patent application. Shifan] should exist in steel in sufficient quantity, and under the condition that the 2 materials are hardened and tempered, the sufficient quantity should be able to make / ° with lice gas, and carbides and nitrides. The formations together form 3-12 bodies:% carbides, nitrides, and / or carbonitrides, including &amp; 2-10: m7c3—carbides, —nitrides, and / or a carbonitride structure. Mainly Cr), and 0.1-2.0% by volume, preferably at least vol% of MC-carbides, -nitrides, and / or -gas barriers, where M is mainly hungry, and 沾 also Λ, # # L t Both are made of a matrix towel made of tempered Asada loose iron ::. The total carbon content in the steel, that is, the content of the carbon dissolved in the soil of the steel &lt; &apos; plus the bonding to form carbides, the carbon content should reach at least 0.5%, preferably at least 0.6%, and suitably is At least 0.7%, however, the maximum carbon content can be as high as L3%, preferably up to 114%, and suitably up to 200417613 2 U%. The optimal carbon content range depends on the specific requirements of the steel, as mentioned above, respectively for the fixtures for plastic molds, and for the solid parts, and for the The holder of the mold assembly: the basics-the aspect-This particular application is very important when choosing the most appropriate chromium 3 :. Therefore, 'in terms of the optimal carbon content range', the chromium content of the steel is discussed below for reference. According to a preferred embodiment of the present invention, nitrogen can be avoided.

Steel includes the use of nitrogen as a spray gas: spray forming. According to a first preferred embodiment of the present invention, it therefore contains a maximum of 0.15% N, typically 〇06_〇i2% N: according to a specific aspect of the present invention, by any The conventional technique, that is, the 5th brother, pressurizes the steel melt in a nitrogen atmosphere, under advanced pressure: adding chromium nitride to the melt, or by any other mode, Increasing the rat gas content to at least 0.3%, preferably at least 08%, is also solvable. When nitrogen is present at the above-mentioned content, nitrogen is not a harmful component. Conversely, nitrogen can have a desirable effect by forming a vanadium-and-rolling compound with carbon. Therefore, in the above, and a large amount of MC—that is, M7C3—carbides can also include—a small amount of M compounds. In principle, the powder metallurgy manufacturing of this steel is understandable. It can include gas and spray using nitrogen as the spray gas of the metal melt, but the technology is also heat-intensive and expensive. It cannot or is difficult to meet the demand for good economic benefits of manufacturing. [Si] is derived from the manufacture of steel, exists as a residue, and exists in a content of at least G. 1%. The Shi Xi can increase the hard activity in steel 10 200417613, so it can help provide the appropriate hardness of the steel, which will cause a kneeling question:. In the preferred case, the steel therefore contains ... ⑽ and seconds at least 0.3%. However, Shi Xi is a strong fertilizing iron constituent, so it cannot be present in an amount exceeding i · 5%. , ^ ^ In a better case, the steel does not contain more than the largest Shi Xi, ′ Rarely the largest 0.8% silicon. The nominal silicon content is 5%. , ... [Meng] also comes from the manufacture of steel, and exists in the form of a residue ', and is combined with sulfur through the action of forming a sulfur storage, which is present in the steel in a trace amount. For this reason, manganese should be present in an amount of 0.001%. Manganese also: can promote the hardenability that you want. However, manganese should not be present in more than 1.5 5/6, so as to avoid the problem of embrittlement. In the preferred case, the name steel does not contain more than a maximum of 1.0% manganese, preferably a maximum of 0.6 / Mn. In the most convenient case, the content of manganese falls in the range of 0.2-0.5% Mn. The nominal manganese content is 0.30%. [Chromium] should be present in an amount of at least 14%, preferably in an amount of at least 14.5%, and suitably in an amount of at least 15%, so as to improve the resistance of L ·, Steel Journal Rotten rice. Chromium is also an important constituent of carborides and nitrides, and together with carbon and existing nitrogen to form M7C3—carbides, nitrides, and / or—nitride-breaking compounds, this is the same as MC-carbides, ~ The nitrides and / or a carbonitride together help to provide the desired abrasion resistance. However, Chromium is a strong fertilizing iron constituent. In order to avoid fat iron after hardening from 1 1 00-1 1 50 ° C, the chromium content must not exceed 19% 'In the best case, it does not exceed a maximum of 18%, suitably a maximum of 17. 0 %. 200417613 As mentioned earlier, the optimal carbon and nitrogen content depends on the specific use of the steel. In the case when the steel was used as a fixture, or a detail component of a fixture, which was machined in the machine, the initial experiments indicated that the optimal carbon content range was 14- 15% Cr, and the optimal carbon content range falls between 0.55_〇. 乃%. Therefore, as far as this application is concerned, the nominal content should be 丨 4.5% cr and 0.65% C, respectively. With regard to the second main application, 'mold steel for mold tools for molding plastic materials, and brackets for such tools, the initial experiments indicated that the optimal content ranges should fall between 14-15%, respectively. Cr and 0.8-10% of Ce. In this example, the content of Yi should be 16.5MCr and 0% of C, respectively. However, the best test of ^, will be used for this application. The optimal range of Cr is 16.0%, 俨 掂 *, Γ m H is 15.6% of Cr, 0.80-0.90% of c, said It is 0.85% c. On the same day, it is shown in the range of car-ren ^ L, and ㈣ is a sophomore, and it stays at about 0.09% of N. [I 臬] is the attitude of selecting elements; "., /, 'May-a kind of Vostian iron is stable and appropriate for the amount of the top n sentence of 2.0%, preferably up to 10% I field is taken鬲 〇 · 7% select .υ / ο, high content of fertile iron constituents in 'make /, can equalize the steel, according to the steel of the invention == 锢' "'in a better case however, Nickel is-the species 3 has any intentional nickel content. About 0, 3 or. : Avoidable impurities, in the tolerable range, can be [, ancient] is also a return amount, preferably "0 = sexual 7 ^, can be up to 2.0% of the gate 0.7. Selectivity The existence of the ground allows it to be further improved. 12 200417613 Good anti-tempering ability. However, in the characteristics of the positive steel, 3 is not inferior to, to achieve what you want, you must add any cobalt. Because of the situation, Steel is not included in the 4 lines. Any cobalt that is intentionally added is suitable for the production of steel. At the same time as the production of steel, the amount of cobalt will be 0.1%. I will return to [ 】】 It can be present in an amount of less than 1G%, so the anticorrosive ㈣, which is so expected, is particularly good in anti-porosity, and?, Good processability. The 1 head is also a valuable carbonization Therefore, the requirement that the content should be present in steel in an amount exceeding at least U% is because it must work with anticorrosive properties. However, in principle, the capacity of platinum as a carbide former can be determined by Double the amount of tungsten to replace it. If tungsten is present in the steel, shell &quot; oW / 2 steel The content should be as high as at least 1.5%, preferably at least 18%, and appropriately at least 2.0%, so as to provide the corrosion resistance of the steel agent on the one hand, not to mention the anti-porosity ability, on the other hand Together with carbon, it forms the desired amount of halide. However, molybdenum and tungsten are strong fertilizing iron constituents. Therefore, the steel must not contain more than 40% of () 40 + 1/2), which is more than It is preferably (Mo + W / 2) of up to 3.0%, suitably (m0 + w / 2) of up to 2.8%. A suitable range is (Mo + W / 2) of 2.1-2.6%. The nominal content of Mo + W / 2 is 2.3%. [镌], but 'cannot provide the same improvement in corrosion resistance as molybdenum. In addition, compared to molybdenum, due to the conditions of atomic weight, The required crane contains more than twice as much, which is also one of its disadvantages. Therefore, the content of tungsten in steel is limited to a maximum of 1.0% W. Another 200417613 disadvantage of tungsten is that It is very difficult to dispose of any generated waste, that is, the surplus product (waste) generated from manufacturing or processing steel into a final product plus Therefore, according to a preferred embodiment of the present invention, the steel should not contain any intentionally added tungsten, but can become an unavoidable impurity with residual elements (from raw materials used in the process of manufacturing steel). The appearance of the attitude type exists, in the tolerable range, it is up to 0.4%, preferably up to 0.3%. [Vanadium] should be present in steel at least 0.1%, under normal conditions The amount is 0.5-3.0%, so that the MC-carbides, mono-nitrides, and / or carbons can be formed with carbon and existing nitrogen in the steel matrix of Matian under the condition that the steel is hardened and tempered. Or a carbonitride in a better condition, the steel contains at least ο · 6% of hunger, suitably at least 0.7% of vanadium, and up to 2.0% of vanadium, suitably up to 1.5% vanadium. In the best case, the vanadium content should stay in the vanadium range of 0.8-1.2. The nominal vanadium content is 10%. [Niobium] It is also an element that can form MC—carbides, mononitrides, and long /% — liceides, but for the same purpose, the demand for niobium is twice that of vanadium, which is a disadvantage. . Furthermore, niobium will cause carbides, nitrides, and carbonitrides to have sharper edges, and it will be larger than pure vanadium carbides, nitrides, and / or carbonitrides. It will be large, which will cause breakage or debris, so the fire will be reduced: = the cutting edge and polishability of the material.特 It is particularly harmful to the steel of the present invention, and in terms of the mechanical properties of the steel, the composition of the steel 最佳 is optimized for the purpose of providing an excellent abrasion resistance.

14 200417613 Abrasion resistance combines high hardness with good ductility. Therefore, the steel must not contain any intentional addition of niobium, which means that niobium can only exist as an unavoidable impurity, as a residual element (from the raw materials used in the process of manufacturing steel). Type, the content of which is less than G, preferably niobium of up to 0.05%. Except for some alloys, this steel does not need and should not contain further alloying elements. Some elements are clearly desired because they affect the properties of the steel in unintended ways. Indeed, for example, as far as Lin is concerned, it must be kept as low as possible, preferably G.G5%, and most suitably, u3%, so as to affect the mobility of the steel in a good way. . Similarly, sulfur is also an undesired element in all aspects. '❻ is that its image that is not good for cutting edge can be in the beginning-neutralized by fierce, so it will form a substantially harmless manganese sulfide' Therefore, “sulfur can only be tolerated and is present at a maximum content of 0.2%” to improve the machinability of the steel. In the preferred case, the steel 2 will not contain more than 0.1%, preferably up to 0.05%, and suitably up to 0.025% sulfur. Among the steels according to this specification, some preferred compositions are shown in Table 2 below. "Zhe, Baixian Steel A is used as a detailed component of fixed installation X or fixed device according to the above mentioned", while steels B and C are used as a kind of prayer tool for moulding articles of plastic materials. And a bracket for a mold tool for 'molding β plastic material articles. 15 200417613 The chemical composition is repeated as shown in the table except for V Ni Cu N 'Το' _ &lt; .3 '~ &lt; T ~ &lt; · 3 &lt; .25 — &lt; · 25 &lt; • 25 0.1 ~ ΈΓ 0.09 _A_ ~ C ~ &lt; • 025 '&lt; .025 &lt; .025 &lt; .025 where: ...' The permissible contents of scale, sulfur, crane, nickel, and copper . The maximum amount of element that can exist from impurities can be mentioned above. The manufacture of this steel involves spray forming the molten steel ...

Processed to the desired size. The steel has undergone the conditions of hot fire, wherein the present invention: the hardness of the piece is to soften the hardness (eU-type hardness), preferably the steel has the shape desired by the 200 side BC 'for example according to the above :: Fixed = cut:] into the shape of the detailed components of the fixed device; or, the shape of the mold of the plastic product that is fixed, or injected; or the shape of the components of the extrusion section, between 1GGG and 115 : Steel iron and heat treatment 'preferably in coffee. At the Vosstian ironization temperature, between the appropriate dimension C :: steel is cooled from the Vosstian ironization temperature to about; environment "3〇: 钟 = (if possible), for example, by cooling to minus _i96t Also :: Yu's Vostian Iron. In order to complete the desired secondary hardening, will:-temper at least-times, preferably twice, at a temperature between two =

16 200417613 65 ° C, preferably between 20 ° C and 25 ° C (low temperature tempering): or between 400 ° and 600T: (high temperature tempering). In every person After the annealing treatment, the product will be cooled. The holding time at the tempering temperature may be 1-10 hours. Although, the steel according to the present invention has been developed to be used as the specific mouth, Fu Zhuo, but it should be understood that the steel can also be used in other fields, where the characteristics of the steel are very helpful. Structural elements other than devices and branches. "The further features and aspects of the present invention will be described in the experiments conducted below; [Embodiment] The embodiment consists of: "Sy's size 4 500 500_, weight 2408 kg,"

According to ::::: Experiment: The molten steel is made by spray forming; 1. The composition of the 筮 _ 忒 wheel ingot is shown in Table 3, steel! And non-existent- "Yin Zhe Li Λ Shicai" produced a steel melt with lower chromium containing i spray forming, from the melt 1 kg, _-h main ~ Syria 'size is 0 465mm, weight 2 Provided: Second, steel number 9. In the same table, ^ the composition of the reference material. 17 200417613 Table 3 Chemical composition, expressed in% by weight. As shown in the table, the rest are iron and other impurities. Steel number C Si Μη Ρ S Cr Mo WV Ni Cu N ~ 1 0.88 0.63 0.30 0.026 0.010 17.1 2.32 0.16 0.96 0.20 0.10 ~ ολΓ ^ 2 1.04 0.27 0.74 0.018 0.016 17.3 0.62 na 0.05 0.09 0.03 3 0.89 0.52 0.54 0.026 0.001 17.4 0.97 n A. 0.10 nanana ~ '4 1.7 0.8 0.3 18 1.0 3.0 &quot;-. 0.12 5 1.3 0.3 0.4 18 1.0 1.0 0.06 ~ 6 2.2 0.15 0.3 18 2.4 0.9 0.05 ~ 7 1.6 0.4 0.5 16 0.8 0.5 0.4 8 2.7 0.3 0.3 17 2.1 3.4 Co 1.8 0.05 ~ 9 0.90 0.41 0.27 0.023 0.012 15.6 2.40 na 1.26 0.19 Cu 0.11

Steel numbers 2-8 are reference steels available on the market. The steel number is a steel based on literature information. In Table 3, the analytical composition of steel numbers Bu 3 and 9 and the zen composition of steel numbers 4-8 are provided. The name η · a · means that the content of the element is at the level of impurities, but it has not been analyzed. As mentioned above, steel numbers 丨 and 9 are made by spray forming, steel numbers 2 and 3 are made by traditional methods, and other steels are made by powder metallurgy. The ingot of steel number 1 was forged to form rods with dimensions of 2000 x 80 mm and 0125 mm; the ingot of steel number 9 was also forged to form rods with dimensions of 280 x 135 mm Thing. The steel was forged into rods with a size of 03Q-0125 mm. The material is inspected according to the following conditions: x material • microstructure • hardness • ductility 18 200417613 • abrasion resistance • corrosion resistance I microstructure. Under the conditions of hardening and tempering, TA = 1120t / 30 minutes +525 c / 2 X 2h, the microstructure of the steel rods i and 9 is studied at the center, and the corresponding hardening And the tempering conditions of the reference material-(steel number 2) for comparison. Figure 1 shows the microstructure of steel number 1 at a magnification of 100x. The structure is relatively flat and contains approximately 10% by volume of relatively uniformly distributed carbides, nitrides, and / or carbonitrides, mainly chromium carbides. Compounds, nitrides, and / or carbonitrides: M7C "approximately 9% by volume), and a smaller portion of vanadium carbon; daggers, nitrides, and / or carbonitrides. 2 Steel shown in larger sizes However, it is shown that the structure contains regions with a higher carbide content, partly in the form of agglomerates. Steel E 9 has a more flat microstructure and has a desired carbide content 'I Does not include adhesives: Figure 4. The reference material shown in Figure 2 has a substantially coarse carbide network, which can impair toughness / ductility. Hardness is a condition under soft annealing, hardening and tempering. Proceed to (BnneU hardness, HB). The Vosstian ironization temperature is changed between ^ ° All steels except steel number 3 are subjected to high temperature tempering at 500 or 525 C. Steel number 3 is at / ου C room for tempering Min η u can not be carried out at steel temperature because of the low tempering resistance of the steel. The data obtained by the experiments performed by Fu Xiansuo #f Μ and the materials paid in the literature are all It is listed in Table 5 with .. ^ ^ r. The relative values of pressure intensity are also provided in this table, after a 7, the ratio is proportional to the hardness. In the relative comparison of the tested steels, fear The value of cup r is good (excellent) is 5, the lowest (worse in the comparison of steel) △) is 1. The following information is also provided. After the ductility has been treated, The impact test is carried out at room temperature, and it is performed in the direction of the longitudinal axis of the non-concave test piece.

° ', the absorbed shock energy measured by the knife is 2 6 J, 30 J, and 17 J. These values are the value # 2 in the relative comparison of the tested steels. The steel number Θ has reached a ten-year extension compared to the steel number 1 t, but it is still affected by the intended use of the steel. Considered an acceptable steel. The other comparative values of the ductility provided in Table 5 are estimated based on the microstructure and carbide content of the tested steel. Abrasion resistance After undergoing the same heat treatment as above, a grinding abrasion test was performed according to the pin-against-disc-method, which was performed in the direction of the longitudinal axis of the material having SiO2 paper. As far as the steel number is concerned, the measured material quantity is 8.9 mg / min. For the steel number 200417613 2 and the words, the relative values are * 1U / g and 14.0 mg / min. For the steel number 9, it is 22.5 mg / min. These results are shown in Table 5. The comparison values are the values 43, and 2. The other values in Table 5 are estimated based on the tested steel structure and carbide content. Λ Corrosion-resistant steel numbers No. 2, 4-6, 8 and 9 The measurement of the corrosion resistance was carried out under the condition that the steel was subjected to high temperature tempering (at 525 t) at 0.05 m H 之 s 〇 4 through the generation of polarization curves. The results are shown in Table 4 Among them, it means the corrosion current measured on the active peak of the polarization curve, soil. The smaller the current, the better the corrosion resistance. Table 4 jl Polarization current i 〇bM red green 1 ο Γ T- r—1 --— L._Lgr steel number 1 2 4 5 6 -1 c Γ 8 9 Icr 2.5 53 12 15-40 60 75 3.0 In Table 5, Corresponding values for corrosion resistance of steel numbers 3 and 4 are also provided, which are based on the carbon, chromium, vanadium and molybdenum content in the steel. In Table 5, the relative values of homogeneity, processability, heat treatment response, and production economic benefits are also provided. The relative values of homogeneity are calculated by the microstructure research. The steel can be processed In general, it depends on the hardness of the steel under soft annealing conditions, the content of carbides, the size of carbon 200417613 compounds, and the type of carbides (carbide hardness). The machinability values are based on these parameters. Decided ^ The nine-year-old knowledge is transformed into two parts: refers to characteristics such as the ability of steel to change from a moderately high Vostian iron / plate to Shimo hardness, and requires the necessary, and necessary temperature grade, and appropriate Should be; = Exceeded ⑽ 'This feature is used as the basic feature of the relative value of the two in Table 5: the relative value of non-response. When "" ,， 处理 口 古 # 于 广田 in the economic benefits of different production, not

:: = ,, thick plates, and block materials all need to be considered. All the chemical costs must be calculated in the final production. The powder metallurgy manufacturing department is the most expensive member. 1. It is estimated that the traditional manufacturing has the necessary items + the overall cost is higher than manufacturing including =, ‘’ and 5 ’. Traditional manufacturing can provide a number ...:; Therefore the value is 3. The manufacturing of β-based forming is as follows: The steel is softened and annealed once. (Yeah) The hardness and speciality of the tested steel are + 丄 i.

* Denotes that it cannot meet the needs of high temperature tempering.

In Table 5, the characteristics called steel grade ° M means 22 200417613 5 2 is excellent for the intended application 4-is very good for the intended application 3 2 is for the intended application Good in terms of 2 2 Acceptable in terms of intended use 1 = Inferior in terms of intended use The highest total steel grades 1 and 9 obtained after less than k of steel '28 and 29 respectively, and none of the values were detected. Shown: Poor, which indicates that these steels have good characteristics: the group that belongs to Lu, is not completely ㈣, which means that it may be used in the present invention. Among the materials that are used in different applications, 4 are selected. For reference [Schematic explanation] In the description of the experiments performed below, companion information will be used, in which: The accompanying diagram is shown in Figure 1 which shows the microstructure of the first steel according to the present invention, with a rate of 100X … '丨… factory 丨 from 放大, magnification Figure 2 shows the same steel' magnification 500x; structure · Figure 3 shows 7F is the reference steel structure with the same magnification as Figure 2 100〇χ. The microstructure of the second steel material not according to the present invention is shown in Fig. 4.

Claims (1)

200417613 Scope of patent application: 1.-A steel material with good corrosion resistance, which is characterized in that the steel material has the following chemical composition expressed in% by weight: 0.7-umN), the highest part, preferably the highest Ni 〇 1-2. 0 Si 0.1-1.5 Μη 14-19 Cr From trace to the highest 2.0 N i From trace to the highest 2.0 Co 1. 5-4. 0 (Mo + W / 2) , However, it is at least 1.0 Mo and the highest 0.5-3.0 V &lt; 0.00 Nb from a trace amount to the highest 0.2 S and the rest is iron and a normal amount of impurities 2. The steel material of the first item, which is characterized by the above. After hardening and tempering, the material has a hardness of 52, and a carbide, nitride, and 5-12% by volume. Microjunctions of carbonitrides: behenium compounds, ~ nitrides, and / or stone nitrides, where M is mainly Di, n ΛΑ, 〇, and MC of 0.1 to 3.0 volume 丨Stone reactants, a nitride, and / or an L or a carbonitride, M must be vanadium, all of which are basically tempered. The substrate made of Asada loose iron 24 3 · According to the patent application ^ This steel contains 0 16—Steel steel of 1 or 2 items, which is characterized by Λ-1 · 14 C, preferably 0 · Bu 1 . 0 C. • According to the patent application, this steel contains () 15 steels of 1 or 2 siblings, which is characterized by Sl. —U, preferably 0.3-1.0, suitably 0.3—0 8 5 According to the patent application, the steel includes ancient; the steel of item 1 or 2 is characterized by Mn. Take N · 〇, preferably 0.6 at the highest, suitably 0.2-0 5 1 31 2 ^ The steel package: 14 =: steel that commits sibling 1 or 2 'characterized by 3 14 ~ 15 Cr and 0.55-0.75 C. 8 · According to the scope of the patent application, the steel contains 16 17 Γ or 2 steels, which is characterized by 3 16-17 Cr and 0.8-1.0 C. : The steel according to item 8 of the scope of patent application is characterized by U-16.0 Cr and 〇8. _〇 0.90 c. The steel = steel according to item 1 or 2 of the scope of patent application, which is characterized by-/ 2) ... · δ-3. °, preferably ..., suitably 2. &quot; .6 (11 according to the patent application ifi μ Ί々π Read j Consumption steel of item 1 or 2, which is characterized in that the outline material contains a maximum of 0.4 w.: 2. According to item 1 or 2 of the scope of the patent application, it is characterized by dagger 3 〇 .6 2 · 0, preferably 0.7-1.5, suitably 0.8-1.2 V 25 200417613 13. According to the patent application for the steel of item 丨 or 2, the steel contains a maximum of 0.05 Nb. 14. The steel according to item 1 or 2 of the scope of the patent application, which is characterized in that the steel is the most oriented to 0.15 N, preferably -m. 15. The steel according to the 1st item of the scope of patent application 2, its characteristics The steel material contains a maximum of 0.1 S. 16. The steel material according to item 14 of the patent application scope is characterized in that the steel material contains a maximum of 0.05, preferably 0.025 S. I7. According to item 1 or 2 of the patent application scope Steel, which is characterized in that _ steel contains the most 鬲 0.4, preferably the highest 0.3 [. I8. According to the scope of patent application No. 1 or 2 It is characterized in that the ritual steel contains the highest G · 7 ^, suitably the highest 0 · 1 Co. 1 9 · According to the 1st or 2nd scope of Shen Qing's patent scope, it is characterized in that the steel material contains at least 0.3% by volume of mc mono-carbide, mono-nitride, and / or-carbonitride. 2 〇 According to the scope of patent application No. 丨 or 2 of the steel, characterized in that the culture must be broken through Vostian ironization was carried out at i 005005, and the car was cooled at 1080-ii20 ° C, and then tempered at 150-650 ° C. Preferably, the temperature is in the range of 2000 and 25 ° C 'or the world is in the range of 400 and 600 ° C. 21 · According to the steel material of the scope of patent application No. 丨 or 2, It is characterized in that the steel has a hardness of 58-63HRC, preferably a hardness of 59-62HRC. 22. The steel according to item 1 or 2 of the scope of patent application, characterized in that 4 steel is softened and annealed, and the steel is subjected to Under conditions of soft annealing 26 200417613 has a hardness of 20 0-30 0HB (Brinell hardness) 23. — For example, the use of steel in the scope of the patent application No. 22 is used to 'manufacture the construction elements intended to be used in corrosive and abrasive environments after hardening and tempering. 24. According to the scope of the patent application in No. 23 The purpose is to use the steel of around $ 7 as claimed in the main patent for the fixture of the workpiece, or to fix the details of the component, and the workpiece is cut in a punching machine including a spark cutting machine. 25. According to the purpose of the scope of application for patent No. 23, the steel of any one of the members of the patent scope &quot; ... is used for the manufacture of mould tools for casting moulds. T + i6 · According to the application in the patent application No. 23, it uses the steel of any one of the patent application rails No. 8 # 9 for the manufacture of a mold tool holder for molding the plastic material article. / 27.- Details of fixed parts of fixing devices used as a "gold guard" in the machine. Details of the punching machine including spark cutting machine. ^ The fixing device, or the details of the fixing device is the scope of the patent. Any of Item 7 and Item 21—the steel structure team—a mold tool for molding plastic materials, which is characterized by the following items: the scope of patent application for items 8 and 9, and the items 20 and 2 29.- A support rod for a mold and a jade of a mold for molding the plastic material article, characterized in that the bracket is composed of items 8 and 9 as claimed in the scope of patent application: 27 200417613 and any of the items 20 and 21 made of steel. 28