TW200538560A - High chromium-nitrogen containing castable alloy - Google Patents

Abstract

A corrosion and erosion resistant alloy comprising as mandatory elements besides iron, in % by weight, 31 to 48 chromium, 0.01 to 0.7 nitrogen, 0.5 to 30 manganese and 0.3 to 2.5 carbon. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Description

200538560 IX. Description of the invention [Technical field of the invention] The present invention relates to alloy technology, and more specifically

J 1 East is about nitrogen-containing alloys with high chromium content and high corrosion resistance. According to the invention, J, ft, a castable nitrogen-containing alloy containing a high amount of chromium, a gas containing a high amount of chromium into eight gold, a method for manufacturing the nitrogen-containing alloy containing a high amount of chromium, and a method for preparing the same Product. People

10 ί: Prior Art 3 Background of the Invention Equipment used in highly corrosive environments is typically made of alloys, such as stainless steel and other highly alloyed materials. These alloys must be able to withstand extremely corrosive environments created by chemicals such as concentrated sulfuric acid or concentrated phosphoric acid. A particularly difficult environment is encountered when phosphate fertilizers are produced. When digesting bowls of limestone in hot and concentrated sulfur 15 acids, the device must be able to withstand temperatures up to ⑽ ° C. The crude phosphoric acid produced is extremely corrosive and contains some residual stone gourd gallium. The delta rot I insect effect is often increased by other impurities present in scaly acid, especially ions such as chlorides and fluorides, which normally exist in the scaly stone raw materials used in the manufacturing process. Encountered in the process of concentrating the crude dish acid-the environment of making rot. Stones are deposited all over the world and have many different chemical compositions. The most severe decay environments typically occur during the deposition of sister stones that contain high constituent dendrites such as gaseous or chemical compounds. It is known that increasing the Cr content can improve the resistance of steel to worms. Since the 1930s 200538560, 23-40% Cr '0.8-2% C' 2.5% Si, and high chromium alloys containing up to 5% Mo have been known. See, for example, German Patent No. 701,807. U.S. Patent No. 5,252,149 describes improvements to this alloy, followed by German patent applications Nos. 195 12 044 and 44 17 261. 5 The alloys based on these two patents exhibit high abrasion resistance and good corrosion resistance. However, both of these alloys exhibit poor mechanical properties, especially low viscosity, brittleness, thermal sensitivity, and low notch impact resistance, which limits their usefulness. It has been confirmed that its structure contains ferrous salts (Fe-o〇. The ferrous salt structure contained in this type of alloy is very brittle in nature, and the carbide 10 phase embedded in this brittle phase causes very low viscosity and high notch sensitivity , And high thermal sensitivity. In addition, the ferrous salt structure is oversaturated with chromium, resulting in the formation of a sigma phase, which completely reduces the viscosity and corrosion resistance. US Patent No. 5,320,801 states that it has The following alloys with a composition of 15% by weight: Cr 27 to 34, Ni + Co-13 to 31, Si-3.2 to 4.5, Cu-2.5 to 4, C-0.7 to 1.6, Mn-0.5 to 1.5, Mo -1 to 4, and Fe-substantially the rest. The alloy of the '801 patent has good viscosity, but exhibits very poor hardness and very poor abrasion resistance and low tension. The hardness of the alloy is 208 To 354HB, it is similar to CD4MCU stainless steel 20 in hardness (260-350 HB), it has excellent corrosion resistance, but very poor wear resistance. The alloy system disclosed in US Patent No. 5,320,801 is similar to Austrian Austenitic contains a high amount of nickel stainless steel, which has a good Viscosity, but very low tension and hardness, and poor abrasion resistance. The presence of nickel in corrosion resistant alloys can mainly help structural stability, but it only makes a small contribution to the improvement of good anti-corrosion properties. A representative example is an austenitic stainless steel containing 12-35% Ni, which has a corrosion resistance close to that of a reworked stainless steel containing a low percentage of nickel (4-8%), or a high content of not more than 4% Ni. Chromium stainless steel. The main elements of stainless steel are Cr, Mo, and nitrogen. As shown in the following example, 5 illustrates how different alloy elements affect the corrosion resistance of stainless steel. For example, the wear resistance equivalent (PREN) =% Or + 3.3 X% Mo + 16 X% N, which shows that nitrogen is an important and very effective alloying element in corrosion-resistant alloys. One of the main disadvantages of high-content chromium alloys in conventional techniques is that it is difficult to apply 10 The disintegration of Cr, Mo and N in the matrix without adversely affecting the mechanical properties of the alloy, such as viscosity, tension, brittleness, thermal sensitivity and weldability. This difficulty is due to the sigma of the alloy saturated with chromium and molybdenum Xiangshendian. · From the above-mentioned high content of chromium Premature wear of pump parts made of gold is common. The main contributing factors of this state are very low viscosity, brittleness and low durability. 15 is caused by the poor mechanical properties of the alloy. An individual area is thinned to cause cracks, and such damage often occurs. Finally, other parts that are still effective are destroyed. The mechanism of corrosion and erosion of alloys in the art in acidic environments involves the use of corrosive fluids. The particles in it continuously remove the accelerated corrosion caused by the passive anti-corrosion 20 corrosion layer. This situation is most pronounced in alloys containing higher amounts of Cr and Mo. It inevitably has a significant amount of sigma phase, and the metal matrix has very poor viscosity. In order to restore the passive state layer, it is necessary to use Cr and Mo as high contents as possible. Increasing the ratio of Cr / C, or (Cr + Mo) / C, increasing the high corrosion resistance 200538560 reached the critical point, after which the sigma phase began to form, and the depletion of Cr near the sigma phase completely reduced the alloy And reduce the corrosion resistance of the alloy. The invention provides an increase in the ratio of (Cr + N) / (C-N) or (Cr + Mo + N) / C to (Cr 5 + Mo + N + B) / (CN), by reducing carbon in the matrix The composition and introduction of nitrogen into high-content chromium alloys as effective additional alloying elements are present in solid solutions at high concentrations. Nitrogen ', like carbon, forms a solid with voids with body centered cubic (bcc) a-iron and face centered cubic (fcc) γ-iron. The size of the nitrogen atom is smaller than that of the carbon atom. At 10, the nitrogen atom can be more easily based on the interstitial positions of the α- and γ-phases than the carbon atom. At the same temperature, the maximum solubility of nitrogen in Fe-δ and Fe-γ is several times higher than that of carbon, which results in the substantial extension and distortion of the element lattice. Nitrogen has a more solid solution hardening and strengthening effect than carbon, so it has a higher level of viscosity at the same time.

The solubility of nitrogen in high-content chromium alloys with conventional techniques is limited to at most very low 0.15% N. This limitation is caused by the inherent low physicochemical solubility of nitrogen and carbon in the structure of Fe ~ a (C + N is 0.02% to a maximum of 008%), and by the same token, the Mη component is $! · 5%, It constitutes at most 40% of the alloy in German patent application No. 44 Π261 or 195 12040. In order to improve the mechanical properties of high-nickel stainless steels containing austenite without damaging the ductility and corrosion resistance, adding nitrogen is the most effective method. As it has been found, if there is a large amount of Mn and / or% in nitrogen-rich alloys, nitrogen can be used as a completely effective anticorrosive, and it can have a wide range of definite effects on the mechanical properties of castings, such as increasing tension, Hardness and viscosity, and 钲 lead to 200538560 l expansion loss. In particular, under these conditions, nitrogen dissolves in the solid state two to four times better than other high-content chromium alloys. Similarly, in high-manganese alloys, it can dissolve up to 0% of nitrogen, and even up to 1% under high nitrogen partial pressure. 'Its tension and hardness can be increased by two to four times, while having the same 5 but Nitrogen-free steel is as good as ductility. [Summary of the Invention] Summary of the Invention The present invention provides a corrosion-resistant alloy containing, expressed as ® wt%, chromium 31 to 48, nitrogen 0.01 to 0.7, manganese 0.5 to 30, carbon 0.3 to 10 2 · 5, Butterfly 0 to 5, molybdenum 0 to 6, silicon 0 to 5, copper 0 to 8, cobalt 0 to 4, and nickel plus cobalt 0 to 25. This alloy further contains rhenium, vanadium, hafnium, titanium, tantalum, tungsten, niobium, aluminum, Mai 'and rare earth elements each of 0 to 2%, and the rest contains iron and inevitable impurities. The alloy has a microstructure that contains chromium carbides, nitrides, and optional borides in an austenitic matrix. The matrix has a face center that is oversaturated by nitrogen in the form of solid 15> valley. Cubic structure. The composition of this alloy satisfies the following relationship: _% Ni-l ·% Co + 0.5 (% Mn +% Cu) +30 (% Ν +% 〇 + 5χ% Β 、 一% Cr * f% Mo +% S / +1.5 (% Ti ^-% Ta +% V +% Nb +% Ce +% Αί) ~ 15 In one aspect, the alloy may include platinum, stone, shed, copper, and / or (nickel plus cobalt) Each, at least 0.01% by weight. 20 In another aspect, the alloy may have a PREN from 58 to 66 and / or the matrix may contain nitrogen in the form of a solid solution from 0.25% to 0.45%. In another aspect, the alloy may include at least 32% by weight of chromium. In yet another aspect, the alloy may include chromium 32 to 34, nitrogen 0.35 to 200538560 0.45, manganese 6 to 9, carbon 0.5 to 2.5, To 4.5, _ to 5, Shi Xi 0 to 3, 5

10 15

Copper is 0 to 4, diamonds are 0 to 4, and nickel is added to 4. This alloy may include Fan 5, # 0.5 to 3, Copper 0.7 to 4 and / or Luminous 15 to 4. By way of example, this alloy can be turned 2 to 4, fox 5 to 2, copper 0.7 to 3 and copper plus .5 to 3. In addition, the alloy may contain at least 0.01% by weight of carbon. In still another aspect, the alloy of the present invention may include, expressed in weight%, chromium 35 to 40, nitrogen 0.4 to 0.6, money 4 5 to 15, carbon 0 8 to 2 6 to 5 , _ To 5, Shi Xi 0 to 3, copper 0 to 6, beginning 0 to 4 and nickel addition. This alloy can contain, for example, 2 to 4, 5 to 2, 2 and 3, and / or nickel plus 4 to 13, for example, can include carbon 〇6, turtle 5 to 13, milk to 4, delete 0 to 4.5, Shi Xi (mL5, copper tin, 〇1 to 4 and Lujia 4 to 12.5, or may include carbon ⑴55, heart to 12, indium out of $, _ to 4 silicon 0.6 to 1.2, copper 1 to 2 5. Ming 002 to 4 and nickel plus Ming 4 to this alloy may have a PREN from 58 to 66 and / or its matrix may contain nitrogen in the form of a solid solution from 025 to 0.45% by weight. In still another aspect of the invention alloy, the alloy may include, expressed in% by weight, chromium 41 to 48, nitrogen 0.45 to 0.7, violent 6 to 30, carbon 0.9 to j 5, to 3.5, _ to 4. Shi Xi 0 to 3, steel 0 to 8 and nickel plus _ to 25. This alloy may contain, for example, indium, Shi Xi, which, copper and / or (nickel plus steel), each of which accounts for at least _ % By weight. In particular, the alloy may include indium hill, silicon 0.5 to 3, copper 1 to 8 and nickel plus cobalt 10 to 25. Also, it may have a PREN from μ to 72 and / or its matrix may include 0.25 to 0.45% by weight of nitrogen in the form of a solid solution. 〇 In still another aspect of the alloy of the present invention, the alloy may contain, expressed as a weight of 20 200538560% by weight, chromium 34 to 34.5, nitrogen 0.39 to 0.44, manganese 7 to 8, carbon 1.3 to 1.5, Shi Peng 0 to 3.5, fine to 4, Shi Xi 0 to 3, copper 0 to 8 and nickel 0 to 25. This alloy may contain, for example, molybdenum, silicon, boron, copper, and / or (nickel plus cobalt) Each accounted for at least 0.01% by weight. In particular, this alloy may contain molybdenum 3 to 3 3, 5 stone eve 0.6 to 0.8, steel 0.6 to 0.8, nickel 7 5 to 8, and 鈒 〇2 to 〇5. In still another aspect of the alloy of the present invention, the alloy may contain, expressed as weight%, chromium 31.5 to 34, nitrogen 0.35 to 0.45, manganese 6 5 to 9 5, 7 to 1.8 fine. To 4.5, fine to 5, Shixi 0 to 3, copper 0 to 4 and nickel 0 to 14. This alloy may contain, for example, molybdenum, Shixi, butterfly, copper and / or Each of the 10 accounts for at least 0.01% by weight. In particular, the alloy may include 1-2 to 3, Shi Xi 0.4 to 0.6, copper 0.6 to Cr 11 to 13, and 0.2 to 2.8. 0.4, and tungsten 0 to 1.8. In still another aspect of the alloy of the present invention, this combination May comprise an amount expressed as weight% '㈣.5 to 33, (iv) nitrogen to ⑽, Meng 7-9, carbon coffee (iv),

Boron 0 to 4.5, molybdenum 0 to 5, Shi Xi 0 to 3, copper 0 to 4 and 0 to 14. This alloy may contain, for example, slab, stone, side, steel, and / or (each plus, each accounted for at least _% by weight. In particular, this alloy may contain Si. 2 to 3, vanadium 0.8 to 1.2, and magnesite 0.4 to 0.6, copper 0.8 to ι · 2, nickel η to 13, to 0.5 〇 The alloy may include, in terms of weight, manganese 7.5 to 12, and carbon 1.5. In one aspect, the amount% represents chromium 37.5 to 42, nitrogen 0.45 to 0.6 L7, 4.5, indium 0 to 5, Shi Xi 0 to 3, _ to 4 and nickel 〇 ^ 4. This alloy may contain, For example, indium, stone evening, butterfly, copper and / or (nickel plus name), each of which accounts for at least _% by weight. In particular, the alloy may include, for example, .5 to 20 200538560 2.2, Section 5 to 0 · 8 'copper magic 5, nickel 9 to 14, warship 15 to 〇25, and tungsten 0.5 to 0.8. 5 In yet another aspect of the alloy of the present invention, the alloy may contain, expressed in weight%, chromium 32 to 46, New Zealand 35 to 0.75, Bell 4.5 to 25, Carbon L1 to 2.6, _ to 4.5, _ to 4.5, Shi Xi 0 to 3, copper 0 to 8, nickel 0 to 25, and crane 0 to 2.5. This alloy Can include, for example, turn, stone eve, side, copper and / Or (nickel plus cobalt), each accounting for at least 0.001% by weight. In particular, the alloy may include silicon 0.2 to 2.5, nickel 1 to 18, vanadium 0.15 to 〇25, and tungsten 〇5 To 0 · 8 〇10 In yet another aspect of the alloy of the present invention, the alloy may contain, expressed in weight%, chromium 27 to 36, nitrogen 0.3 to 0.6, manganese 6 to 15, carbon 0.25 to 丨2, _ to 4.5, molybdenum 0 to 4.5, Shi Xi 0 to 3, copper 0 to 8, nickel 0 to 25, and Yan 0 to 2. This alloy can include, for example, molybdenum, silicon, boron, and copper And / or (nickel plus cobalt), each of which accounts for at least 0.01% by weight. In particular, the alloy may contain 15 to 2 x 2 to 2, 6 to 16 for nickel, and 1.5 to 1.5. The present invention also provides The foundry of the present invention containing the various aspect alloys of the present invention. For example, the foundry may be a casing, a pusher, a suction line, a pipe, a nozzle, a stirrer, or a valve leaf. Liangluo alloy, more specifically, a nitrogen-containing, nitrogen-containing, scaly alloy that is resistant to 20 rot and cost. The alloy of the present invention can be used, for example, in the manufacture of slurry pump components, As hood , Pushers, suction lines, ducts, nozzles, agitators, valve blades, especially for cast parts that are exposed to highly corrosive abrasive slurry. A typical application of these parts is phosphoric acid Wet manufacturing method. Industrial phosphoric acid solution series 12 200538560 Chemical compound, including sulfuric acid, hydrofluoric acid, hydrochloric acid, chloride, fluoride and gypsum, all kinds of high depassivation that are highly harmful to the exposed components. Used for Another application of this type of component is a power generation washing machine, that is, the component is exposed to sulfur and gypsum during the desulfurization process of the fuel gas. 5 An object of the present invention is to provide a material having high resistance to gaseous environments, exhibiting special properties in an acidic and alkaline environment, and combining good mechanical properties and high structural stability. This combination is very useful in applications such as the chemical industry where there are issues related to corrosion caused by acids, and contamination by chloride acids magnifies the effects of corrosion. The combination of these properties of the alloy 10 results in high strength leading to a design solution that is advantageous from an economic point of view. Materials currently available that have good characteristics in acid environments include steels with high nickel content, which makes these materials very expensive. Another disadvantage of austenitic steels is that they usually exhibit very low strength. It has been found that the maximum solubility of nitrogen in the solid solution of the iron-chromium-manganese alloy of the present invention is 0.013 to 0.0155%, with chromium 15 1% and at least 6% manganese and at least 2% molybdenum as the best improvement. Nitrogen has a lower affinity for chromium than for carbon. The properties of the above-mentioned intermediate nitrogen in high chromium manganese alloys cause carbon to be changed into carbide phases in these alloys, forming a solid chromium carbide eutectic alloy with excess carbon dissolved in the matrix and nitrogen. . 20 Introducing nitrogen at a high concentration into a solid solution that has a stronger effect on the formation of a delayed sigma phase than carbon, thus allowing large amounts of chromium and molybdenum to be dissolved in the iron-chromium-manganese alloy to promote passivation. Nitrogen generally improves corrosion resistance, especially in chlorides containing media. In stainless steel, tested by PREN evaluation (corrosion resistance equivalent) and 13 200538560 shows its effectiveness two percent chromium + 3.3 x% molybdenum + 16 x% nitrogen. The higher the element's passivity level (chrome, molybdenum, button), the higher the resistance to corrosion / erosion. The alloy of the present invention may be cladding. Butterflies react with many elements in the periodic table to form many compounds. The strong covalent bonds of most decay compounds are due to their rhenium melting point, corrosion resistance, and hardness. The chemical resistance of boride is better than most corresponding nitrides and carbides. Because of the larger atomic size of b; s〇91a, compared to C = 0.77A and N = 〇 · 71A, the substitution between the cracks of boron at an undistorted octahedron is rare, mainly resulting in boron The compound MnBm (NiB, CoB, MnB, FeB, rhenium) is bonded in the middle. 10 In addition, nickel, manganese and iron react very hard with boron and form hard compounds which are harder than the corresponding nitrides or carbides. In extremely abrasive and corrosive applications, boron systems are used at a preferred concentration of up to 5% B, with carbon-containing forms 0.3% to L2% and nitrogen-containing forms 0.4% to 6%. According to the present invention, overall excellent results can be achieved. With this novel microstructure 15 and a corrosion-resistant matrix, preferably austenite with a face-centered cubic crystal structure, and nitrogen passivation in the form of solid, valley liquid Full of it. The matrix is very hard, solid, non-fragile, and has carbides and nitrides (and optionally borides added) embedded in it, which additionally gives the matrix high abrasion resistance. In the present invention, it is preferable that 0, 20 Mo & N containing a high content solid solution, without chromium or Gu, will be limited by the sigma phase Shen Dianwu. The desired alloy composition element of the present invention satisfies the following relationship, which is the austenite value of the alloy: 14 200538560% Ni +% Co ± ^ 5 (% Mn +% Cu) ^ 0 (% Ν + p% Cr +% Mo +% 5 / + Γ.5 (% Ti T% Ta +% V +% Nb +% C7T% JT) ^ 1: > As the nickel and cobalt in the austenite sample are added in the concentration range of 0.001 weight % To 25% by weight, it is possible to explicitly control the 5 ratio of ferrous salt and austenite phase in the matrix. The carbide lattice in the ferrite matrix and the high carbon content of cold hard casting types are usually extremely High fragility can be avoided by the advantage of chromium carbide precipitation in the only phase, the austenite phase. Because the austenite phase, unlike the ferrite phase, will not be separated by the intermetallic phase or It is embrittled during the separation process, and its risk of fracture due to the pressure between the carbide and the matrix is 10%, and it is larger than that in the case of complete ferrite or ferrite-austenite matrix. The content is in the range of 0.01% to 6% by weight, preferably 2% to 4% by weight 'especially in the range of 2% to 3% by weight, which can increase the properties of wealth and rotten insects', especially in the gas acid media 15 20 In addition, by changing the content of carbon and chromium in the alloy, the carbon ranges from 0.3% to 2.5% by weight, and the range of 28% to 5% by weight of chromium. The properties can be adjusted to meet the specified standard specifications. The anticorrosive impurity-containing high-amount nitrogen-containing austenitic alloy of the invention has excellent south temperature strength and is suitable for building materials for paving, chemical waste reaction, and Other equipment that is regularly exposed to high temperatures and / or harsh environments. The present invention also provides a metal casting material whose abrasion resistance is about the same as that of a normal commercial type white scale iron material, and in addition exhibits high resistance in aggressive media Corrosiveness. In addition to contact and resistance, the alloy according to the present invention has good characteristics of each piece. Therefore, 'it can be produced by traditional high-grade steel reed makers. Tungsten 15 200538560 pieces of material also have good work and may be mainly These favorable properties of the alloy attributed to 2 @ 明 5

10 15

20 parts by weight of carbonization has a nitrogen content of 7% by weight, which is sufficient for depletion. Compared with the previous type of chromium casting in the matrix with a reduced content of 1 :, the heart has a better corrosion resistance and operable alloy, which is known for its application and wear resistance κ Γ. ΓΓ also It can be applied to air dazzling, can be scaled to resist plum blossoms, such as the second see: very wide Shi Fei "3 Θ Nitrogen-containing alloy, shouting, 2 degrees response to the Japanese low temperature hardening process, so it becomes super strong. When it is hardened by low temperature treatment, the abrasion resistance is ‘greater hardness and durable base’, and it ’s also a sink of σ-sub-carbide. The preparation of the alloy of the present invention can be performed by the conventional method without special conditions such as, for example, controlling the air pressure, special melting furnace, protecting slag or other mold materials. During the processing of this month, the nitrogen-containing tungsten-containing alloy with a high amount of chromium has δ-day polyalloying elements dispersed in the austenite phase or its transformation products. , Preferably from -100 叩 to -300CF, can obtain much greater hardness than obtained by traditional high temperature processing methods. ^ ^ The production of high-content chromium-nitrogen-containing alloys is prepared in the presence of air or H in the presence of all element f metallized metal clusters, thereby pouring pounds, cold materials, and low-temperature cooling of the material castings The surface processed to produce the right hardness cast iron can be cleaned and finished before or after low temperature cooling. The 'preferred process' in more detail includes the following steps: (1) mixing the necessary ingredients to be put into the furnace; (i) melting and mixing the mixture to form a pourable refining metal; (5) pouring the molten metal composition into- A suitable mold; ⑷ allow the mold and its casts to cool to room temperature under external conditions; ⑸ clean and finish the surface of the cast, such as' removing the surface by grinding, etc .; and 1〇⑹ The immersed tungsten pieces are immersed in a low-temperature cooling medium at a temperature of -100F to -300 ° ρ_ for a period of time until it is sufficient to the desired hardness. L 实 方 方 方式] Detailed description of the present invention 15 The details shown here are taken as examples and the purpose is to discuss only the specific examples of the present invention, and to make the principles and concepts of the present invention possible. It is believed to be the most useful and easy to understand. In this respect, rather than attempting to show the more detailed architectural details of the present invention, but only the basic understanding necessary for the present invention, this description will make apparent to those skilled in the art 20 several forms by which the present invention can be implemented. Mechanical Properties Test The following several mechanical tests are performed with the following measurement methods: Tensile strength-(Ksi and MPa) Deflection-(mm), 30.5mm cast rod, 300mm span 17 200538560 Ductility (% ) Impact resistance-⑺, delete test, 305-degree diameter rod without nicks, pray for support over 76mm. Fracture toughness- (MPa · Vm, place

Bu used the double twist technique described by J.W. Otwater in ASTM STP 559 U-Special Towels. Hardness-(HBW): Brinell test, 300 mm tungsten carbide ball on a 300 kg load.

For testing, the alloy of the present invention was compared with alloys of a known technique before the invention, with stainless steel as a reference. The specific alloys tested are as follows: Preferred alloys (compositions are expressed in plus%) US Patent No. 5,252,149: 1 2 3 Cr 36.6 Cr 38.2 Cr 39.3— C 1.9 C 2.06 C 2.02 Μη 1.2 Μη 1.5 Μη 1.1 Si 1.5 Si 1.4 Si 1.5 Mo Mo 1.2 Mo 1.8 Ni 2 Ni 1.2 Ni 1.6 Cu 1 Cu 1.2 Cu 1.6 The rest-Fe and unavoidable surface impurities-The remaining Fe and unavoidable surface impurities-Fe and unavoidable surface impurities (Expressed in%) US Patent No. 5,320,801: 4 5 6 Cr 29.8 Cr 32.7 < Cr 34.8 Ni + Co 17.2 Ni + Co 26.5 Ni + Co 34.5 Si 3.4 Si 3.2 Si 3.5 Cu 1.9 Cu 3.1 Cu 3.8 C 1.65 C 1.28 C 1.26 Mn 1.1 Mn 1.5 Mn 1.6 Mo 0.9 Mo 1.8 Mo 2.2 remaining -Fe --- | 1-remaining -Fe remaining -Fe w 1 18 200538560 I and unavoidable surface impurities and unavoidable surface impurities and unavoidable surface impurities Alloy (composition & wt ·%): 1 7 I 8 9 10_ 11 — 14 15 16 Cr 35.8 Cr 37.3 Cr 37.9 Cr 38.3 Cr 34.Γ Cr 32 ~ Cr 32 Cr 40 N 0.42 N 0.48 N 0.4 N 0.52 N 0.42 N 0.45 N 0.55 N 0.55 Mn 6.1 Mn 9.8 Mn 5.2 Mn 11.1 η 7.5 Μη 8 Μη 8 Μη 10 C 1.26 C 1.33 C 1.33 C 1.41 C 1.4 C 0.75 C 0.75 C 1.6 B 0.2 B 0.15 B 3.8 B 0.1 B0 B0 B0 B0 Mo 3 Mo 2.6 Mo 2.6 Mo 2.2 Mo 3.15 Mo 2.6 Mo 2.6 Mo 2 Si 0.9 Si 0.8 Si 1 Si 0.7 Si 0.7 Si 0.5 Si 0.5 Si 0.65 Cu 1.5 Cu 1.7 Cu 1 Cu 1.9 Cu 0.7 Cu 0.8 Cu 1.0 Cu 1.2 Co 2.1 Co 0.6 Co 0.5 Co 4 Co 0 Co 0 Co 0 Co 0 Ni 3.25 Ni 3.6 Ni 8.2 Ni 0.2 Ni 7.75 Ni 12 Ni 12 Ni 11 V 0.22 V 0.4 VI V 0.2 Mg 0.03 W 0.65 rest · rest-rest ~ rest-rest-rest-rest-rest_ Fe and Fe and Fe and Fe And Fe and Fe and Fe and Fe and unavoidable, unavoidable, unavoidable, unavoidable, unavoidable, unavoidable, unavoidable, unavoidable, unavoidable, miscellaneous, miscellaneous, miscellaneous, miscellaneous, miscellaneous, heterogeneous _A * = not tested

German Patent Nos. 19512044 and 4417261 (composition with plus%

(Expression): 17 18 Cr 43 19 Cr 38.8 Cr44 Ni 5 nT§ 'Ni 10 Mo 2 Mo 3 Mo 3.5 Cu 2 Cu 2.5 Cu 2.1 N 0.19 N 0.09 ^ N 0.15 Si 1 Si 1.5 ^ Si 1.5 Mn 1 Mn 1.2 Mn 1.1 — C 1.6 C 1.7-C 1.6 V 1.2 Remaining-Fe and unavoidable surface impurities Remaining, Pe and unavoidable surface impurities ------------ Remaining -Fe and unavoidable f impurities 19 200538560 Stainless steel alloy (composition in wt.% (Expression): 1 20Cb3 Cd-4MCu + N 317L Cr 20 Cr 26.5 Cr 18 Ni 37.5 Ni 5.5 Ni 11 Mo 3 Mo 2.5 Mo 3.1 Cu 3 Cu 2.9 C Min. Nb 0.4 N 0.23 C Min C Min remaining -Fe and unavoidable surface The remaining impurities-Fe and the impurities of the unavoidable surface · The remaining impurities of Fe and the unavoidable surface 1

20 200538560

I < heat treated at 1450 ° F for 3 hours HiL &d; d hardened at 1400 ° F for 4 hours hardened at 1400 ° F for 4 hours hardened at -300 ° F low temperature C hardened / ~ S ^ PQ 〇s inch§ inch 8 cn cn < N r— ^ »n Fracture toughness (MPa Vm) os τ * Η < N τ-Η OO τ-Η 1 rH rH v〇r—Η ό ▼ —Η 22-26 26-34 cn (N ( N 48-59 ro CN Os Cn ri * 0.9-1.9 rH r—H OO cn r— ^ CTN cn r— ^ oc OO r »H Ο 〇ο o 0.3-0.6 0.3-0.5 0.5-1.1 tension (MPa) tension (Ksi) s 00 On Sample Series 5 Tigers. US 5,252,149 < N m US 5,320,801 inch invention invention 200538560

Heat treatment as casting heat treatment as casting heat treatment heat treatment heat treatment heat treatment at 1800 ° F heat treatment for 2 hours § § VO inch m 〇〇 〇On prepared β cn cn m vn 40-50 41-49 30-36 36-47 ^ -H flat ▼ — ▼ rH rH 0 inch H 00 Deflection (mm) VO rH FREE (Ν r— ^ 〇〇 < Ν Os 1.5-2.2 o (NT— ^ 0.6-1.6 0.4-1.0 〇0.3-0.6 d V〇 (N inch d CSI d ο 〇o Tension (MPa) smc \ Bu 578-686 \ o \ 〇 Tension (Ksi) r—4 g Os oo \ D in s Sample number. oo σ \ om inch τ— ^ s ΐ§ Chu 5 bu 00 1 '' c \ rH 200538560 The alloys 1, 2, 3, 17, 18, and 9 of the conventional art have eutectic microstructures, in which the matrix is mainly ferrite (Fe_a). According to German patent application number 4172261 Or 19512044 alloys, identified as 17, 18, and 19, can have up to 40% or Fe-a phase in the matrix. Fe a 5 phase inherently has very low toughness in high chromium-containing alloys because carbon and nitrogen are The degree of Fe (X-phase / valley) is very low. Even small, limited nitrogen additions have a detrimental effect on toughness, deflection and thermal sensitivity. Makes the alloy more brittle. U.S. Patent No. 5,320,801 4,5, and 6 alloys are high nickel-containing chromium alloys with austenite microstructures. These high nickel alloys inherently have very low 10-sheet strength, and Very low hardness. As castings exceeding 200 HB, they lose their toughness and corrosion resistance after hardening in the range of 300 HB. It can be identified from Table 1 above that the alloys of the present invention and the alloys of conventional skills Compared with the combination with improved characteristics. Corrosion test 15 The alloys of the known art and the alloy of the present invention are subject to corrosion tests. A set of corrosion resistance tests are performed at 80 ° C with 1000 ppm to 3000 ppm. Chloride content in the synthetic P205 acid. Was anxious and was given a 96-hour test (mmy). The results of the corrosion test are summarized in Table 2. A set of corrosion tests were performed at 80 ° C with a chromium content of 1,000 to 3 〇ppm 0 in the synthetic P205 acid.% Agitation test (mmy). The results of the corrosion test are summarized in Table 2. 23 200538560 Table 2

Sample number Hardness (HBW) Chromium content (PPM) Corruption rate (mmy) PREN =% Cr + 3.3 x% Mo + 16x% N 5 260 1000 17 PREN5 = 38 US patent 2000 28 5,320,801 3000 56 as casting 5 330 1000 23 Hardened at 2000 36 1400 ° F / 4 3000 65 hr 2 460 1000 15 PREN2 = 42 US patent 2000 23 5,252,149 3000 49 as casting 8 450 1000 8 PREN 8 = 53 the invention 2000 11 as prayer piece 3000 16 stainless steel 180 1000 13 PREN = 30 20Cb3 2000 14 (20Cb3) 3000 32 stainless steel 280 1000 11 CD-4MCU 2000 15 N 3000 19 PREN = 38 CD-4MCU 330 1000 17 N 2000 28 hardened 3000 45 stainless steel 185 1000 0.68 PREN = 38 317L 2000 1.1 (317L) 3000 The following conclusions can be drawn from Table 2: U.S. Patent No. 5,320,801 containing 26% nickel high chromium alloy No. 5 has an alloy No. 2 which is more than U.S. Patent No. 5,252,149 Low corrosion resistance, with alloy No. 2 having a nickel content of only 1%. The same conclusion applies to stainless steel alloy 20Cb 3, where the nickel content is 37%. The alloy CD4MCuN contains only 5% nickel. The main function of nickel in corrosion resistant alloys is as a structural component. 24 200538560 The nitrogen-containing high chromium alloy No. 8 of the present invention contains only 3.6% of nickel, but contains 048% of nitrogen, which is a very powerful rot scale preparation. The interaction of nitrogen and gas buffers their harmful effects on the alloy. According to the present invention, alloy No. 8 with the same PREN-53 has a corrosion resistance that is 2 to 3 times better than conventional alloys No. 5 and 52. Insecticidal. The alloy No. 8 of the present invention contains a high content of chromium, iron, and high concentration of nitrogen, and has the best corrosion resistance in an acid environment containing a high amount of gas. Alloys 13 and 14 of the present invention are undergoing subsequent corrosion tests. The preliminary results of these tests are alloys of both, especially alloys 14 and 10, which have better corrosion resistance than conventional techniques. Conventional art alloys and alloys of the invention are also tested for corrosion / erosion, as described below. Corrosion / corrosion test Corrosion / corrosion test was performed using 15 acid, 15% H2S04, 0.05% hydrofluoric acid, and 1000 PPm C1 30% by weight oxidation suspended in ρ205 Aluminium (80 microns), 800oC overflow, 650 RPM rotation, mass loss (mg) for 12 hours. The results of the corrosion / erosion test are shown in Table 3 below. 25 200538560

Table 3 Sample number Hardness HBW Mass loss (mg) PREN = CR% + 3.3 X Mo% + 16xN 5 US patent 5,320,801 as casting 260 306.6 5 Aging hardened at 1400 ° F / 4 hr. 330 282.6 PREN (5) = 38 pcs Invention 8 as casting 530 450 96.3 123.3 PREN (8B) = 53 8 Annealed / S solution at 2000. F / 4 hr. 450 125.1 PREN (8) = 53 stainless steel CD-4MCuN solution annealed 280 426 PREN = 38 (CD-4MCuN) CD-4MCuN age hardened 330 328.2 20Cb3 solution annealed 180 660.3 PREN = 30 ( 20Cb3) This slurry corrosion / erosion test indicates that the alloy 20Cb 3 with the lowest hardness shows the largest mass loss. The conventional skill alloy No. 5 has a lower hardness compared to the reference 5 stainless steel CD 4MCuN. The mass loss of alloy 5 of US Patent No. 5,320,801 is 50% less than that of CD-5MCuN. The mass loss of alloy sample No. 8 according to the present invention is 245% less than that of the reference alloy CD4-MCuN. Alloy No. 8 with the highest PREN factor = 53 has the highest corrosion / erosion resistance, ie, 3.5 times better than the reference alloy CD-4MCuN, and better than Alloy No. 5 according to US Patent 5, 5 320, 80 No. 1 2.3 times. The boron-containing alloy No. 9 with the highest hardness and PREN = 53 according to the present invention possesses Yuan Shang's anti-corrosion / invasion resistance, that is, 4.4 times better than the reference alloy CD-4MCuN, and better than according to US Patent 5,32,0,8. No. 5 alloy is 29 times better. Any conventional or casting technology under nitrogen partial pressure can be used to produce the alloy of the present invention. Preferably, the alloy is formed using conventional casting techniques and subsequently at a temperature of 1800. To 2000. Heat treatment is performed in the F range, followed by air cooling. The best hardening method used for the alloy of the present invention is through low temperature treatment ... cooling to at least from -100. F to _300. F, and maintain the casting wall thickness at 15 inches per hour at this temperature. This low temperature step can be performed on equipment and machines in the conventional thermal cycle processing field. First, the object under treatment is connected to a cryogenic fluid supply, such as liquid nitrogen or a similar cryogenic fluid. Expose the chamber to the effects of the cryogenic fluid until the & degree is reached. In the case of liquid nitrogen, it is _ move. F (ie, 300 ° F below minus 20). In particular, the examples provided above are for explanation only and are not intended to limit the present invention. This is because the present invention has been described by exemplary embodiments. It can be seen that the words used herein are for description and illustration, not for limitation. sentence. In the scope of the accompanying patent application, as described or amended today, the change can be implemented without departing from the scope and intent of the present invention. Although the description of the present invention involves specific components, materials, and embodiments, the present invention is not limited by this specific disclosure; rather, the present invention can be extended to all functionally equivalent architectures, methods, and uses, For example, within the scope of the attached application patent. L schema brief description 3 None. 10 [Description of main component symbols] None 0 28

Claims (1)

200538560 10. Scope of patent application: 5 10 15 1. An anti-corrosion alloy with li, containing, expressed in weight%: chromium from 28 to 48, nitrogen from 0.01 to 0.7, manganese from 0.5 to 30, carbon from 0.3 to 2.5, boron from 0 to 5 Molybdenum from 0 to 6, silicon from 0 to 5, copper from 0 to 8, cobalt from 0 to 4, nickel plus cobalt from 0 to 25, the alloy further contains from 0 to 2% rhenium, vanadium, rhenium, Titanium, tantalum, tungsten, sharp, copper, rare earth elements, the rest contains iron and unavoidable impurities. The alloy has a microstructure containing chromium carbides, nitrides, and optional boride in one. In the austenite matrix, the matrix has a face-centered cubic crystal structure and is oversaturated by nitrogen in the form of a solid solution. The composition of the alloy satisfies the following relationship:% M +% Co +0.5 (% Μη +% Cu) +30 (% Nl ·% C) + 5x% B, $% Cr +% Mo +% 5 / + 1.5 (% Ti +% Ta +% V +% Nb 4-% Ce +% Λ /) " 0 2. For example, the alloy of claim 1 in which the alloy contains manganese expressed as 4.5% to 30% by weight. 3. The alloy as claimed in item 2 of the patent application range, wherein the alloy contains in weight% 29 200538560 5 10 15 20 is expressed as nitrogen from about 0.35 to 0.7. 4. The alloy according to item 1 of the scope of the patent application, wherein the alloy contains at least one of molybdenum, silicon, copper, and (starting from the beginning), each in an amount of at least 0.01% by weight. 5. The alloy of claim 1, 2, 3 or 4, wherein the alloy contains at least 31% by weight of chromium. 6. The alloy of claim 5 in which the alloy contains at least 32% by weight of chromium. 7. —An anti-corrosion surname and invasion alloy containing, expressed in weight%: chromium from 32 to 34, nitrogen from 0.35 to 0.45, manganese from 6 to 9, carbon from 0.5 to 2.5, and boron from 0 to 4.5, molybdenum from 0 to 5, silicon from 0 to 3, copper from 0 to 4, cobalt from 0 to 4, nickel plus cobalt from 0 to 4, the alloy further contains 0 to 2% zirconium, vanadium, hafnium , Titanium, tantalum, tungsten, niobium, aluminum, calcium, and rare earth elements, the rest containing iron and unavoidable impurities, the alloy has a microstructure containing chromium carbides, nitrides, and optional borides In an austenite matrix, the matrix has a face-centered cubic crystal structure and is oversaturated by nitrogen in the form of a solid solution. The composition of this alloy 30 200538560 satisfies the following relationship:% Ni +% Co + 0.5 (% Μη 4-% Cw) +30 (% +% C) + 5x% 5 s% 0 +% M〇 +% SZ + 1.5 (% 77 +% Γα +% V +% M? +% O +% A /) 〇8. The alloy as claimed in claim 7, wherein the alloy contains one or more of the following in terms of% by weight: molybdenum from 2 to 5, silicon from 0.5 to 3, copper from 0.7 to 4, 10 Nickel plus cobalt ranges from 1.5 to 4. 9. The alloy according to item 8 of the patent application, wherein the alloy contains, expressed in weight%: molybdenum from 2 to 4, silicon from 0.5 to 2, copper from 0.7 to 3, and nickel plus cobalt from 1.5 to 3. 10. The alloy as claimed in claim 7, 8 or 9, wherein the alloy contains at least 0.01% by weight of boron. 11. An anti-corrosion and erosion alloy containing, expressed in weight percent: chromium from 35 to 40, nitrogen from 0.4 to 0.6, manganese from 4.5 to 15, carbon from 0.8 to 1.6, boron from 0 to 5, and molybdenum from 0 To 5, 31 20 200538560 silicon from 0 to 3, copper from 0 to 6, cobalt from 0 to 4, nickel plus cobalt from 0 to 13, 5 This alloy further contains from 0 to 2% rhenium, vanadium, rhenium, Titanium, tantalum, tungsten, niobium, aluminum, calcium, and rare earth elements, the rest containing iron and unavoidable impurities, the alloy has a microstructure that contains chromium carbides, nitrides, and optional boride in In an austenite matrix, the matrix has a face-centered cubic crystal structure and is oversaturated by nitrogen in the form of a solid solution. The composition of the alloy 10 satisfies the following relationship:% M +% Co + 0.5 (% Mw +% Cw) + 30 (% N +% C) + 5x% B.% Cr +% Mo -f% 5 / + 1.5 (% Ti +% Ta +% V +% Nb ^% Ce +% Al)-〇12. If the scope of patent application The alloy of item 11, wherein the alloy comprises one or more of the following, expressed as% by weight: molybdenum from 2 to 4, 15 Silicon from 0.5 to 2, copper from 1 to 4, and diamonds from 4 to 13. 13. The alloy according to item 11 of the patent application range, wherein the alloy contains, expressed in weight%: carbon from 0.9 to 1.6, manganese from 5 to 13, molybdenum from 2 to 4, boron from 0 to 4.5, 32 20 200538560 silicon From 0.5 to 1.5, copper from 1 to 3, cobalt from 0.01 to 4, and nickel plus cobalt from 4 to 12.5. 5 14. The alloy according to item 12 of the patent application range, wherein the alloy contains, expressed in weight%: carbon from 1 to 1.55, manganese from 5 to 12, # molybdenum from 2 to 3.5, 10 boron from 0 to 4, silicon From 0.6 to 1.2, copper from 1 to 2.5, cobalt from 0.02 to 4, and nickel plus cobalt from 4 to 12. 15 15. The alloy as claimed in any one of claims 1 to 14, which exhibits a PREN of 58 to 66. 16. The alloy according to item 15 of the application, wherein the matrix is oversaturated with nitrogen in the form of a solid solution in an amount of 0.25 to 0.45% by weight. 17. An anti-corrosion # and invasion alloy containing, expressed in weight%: 20 chromium from 41 to 48, nitrogen from 0.45 to 0.7, manganese from 6 to 30, carbon from 0.9 to 1.5, boron from 0 to 3.5 33 200538560 Molybdenum from 0 to 4, Silicon from 0 to 3, Copper from 0 to 8, Nickel plus cobalt from 0 to 25, 5 10 The alloy further contains 0 to 2% of zirconium, vanadium, hafnium, titanium, buttons, tungsten, sharp, IS, # 5 and rare earth elements, and the rest contains iron and unavoidable impurities. The alloy has a microstructure The microstructure includes chromium carbides, nitrides, and optional borides in an austenitic matrix having a face-centered cubic crystal structure and oversaturated by nitrogen in the form of a solid solution. The composition of the alloy The following relationship is satisfied:% M +% Co +0.5 (% Μη +% Cu) +30 (% N +% C) + 5x% B ^ 9c Cr +% Mo Si-^-ί .5 (Ψ〇Ti +% Ta + % V +% Nb +% Ce Al) ~ 0 18. The alloy according to item 17 of the scope of patent application, wherein the alloy contains at least one of molybdenum, stone Xi, butterfly, copper and (nickel plus), each presenting One is an amount of at least 0.01% by weight. 15 19. The alloy of claim 18, wherein the alloy contains one or more of the following in terms of weight percent: from 1 to 4 for molybdenum, from 0.5 to 3 for silicon, and from 1 to 8, 20 for nickel and cobalt From 10 to 25. 20. For alloys covered by the 18th patent application, their PREN ranges from 51 to 72. 21. The alloy as claimed in any one of claims 17 to 20, wherein the matrix contains 0.25 to 0.45% by weight of nitrogen in the form of a solid solution. 34 200538560 22. —An anti-corrosive surname and money invasion alloy, containing, expressed in weight%: chromium from 34 to 34.5, nitrogen from 0.39 to 0.44, manganese from 7 to 8, carbon from 1.3 to 1.5, and boron from 0 to 4.5, Mo from 0 to 5, Silicon from 0 to 3, 10 15 Copper from 0 to 4, cobalt from 0 to 4, nickel from 0 to 14, the alloy further contains 0 to 2% zirconium, vanadium, hafnium, titanium, buttons, tungsten, niobium, aluminum, calcium and rare earth elements, The rest contains iron and unavoidable impurities. The alloy has a microstructure that contains chromium carbides, nitrides, and optional borides in an austenitic matrix with a face-centered cubic crystal structure. And is oversaturated by nitrogen in the form of a solid solution, the composition of the alloy satisfies the following relationship:% M -f% Co +0.5 (% Μη +% Cu) +30 (% Nl ·% C) + 5x% B, $ % Cr +% Mo +% Si ^ \. 5 {% Ti +% Ta +% V +% Nb ^% Ce ^% Al) ^ 〇23. For example, the alloy of item 22 or 23 of the scope of patent application, wherein the alloy contains 20 molybdenum At least one of silicon, boron, copper, and nickel is each in an amount of at least 0.01% by weight. 24. The alloy as claimed in claim 18, wherein the alloy contains one or more of the following expressed in weight%: 35 200538560 5 10 15 20 Molybdenum from 3 to 3.3, silicon from 0.6 to 0.8, copper from 0.6 to 0.8, nickel from 7.5 to 8, and vanadium from 0.2 to 0.25. 25. — 种 腐 腐 # and money invading alloy, containing, expressed in weight%: chromium from 31.5 to 34, nitrogen from 0.35 to 0.45, manganese from 6.5 to 9.5, carbon from 1.7 to 1.8, boron from 0 to 4.5, Molybdenum is from 0 to 5, silicon is from 0 to 3, copper is from 0 to 4, cobalt is from 0 to 4, and nickel is from 0 to 14. The alloy further contains from 0 to 2% of fault, starvation, hafnium, titanium, and titanium. , Yan, Sharp, IS, # 5 and rare earth elements, the rest is containing iron and unavoidable impurities, the alloy has a microstructure, the microstructure contains chromium carbides, nitrides and optional boride in a Austria In the austenite matrix, the matrix has a face-centered cubic crystal structure and is oversaturated by nitrogen in the form of a solid solution. The composition of the alloy satisfies the following relationship:% M +% Co +0.5 (% Μη +% Cu) +30 ( % TV +% C) + 5x% B s% Cr +% Mo +% Si + \. 5 (% Ti +% Ta +% V ^% Nb ^% Ce + 9〇Al) ~ 丄 ·) 36 200538560 10 15 20 26. If the patent application scope of the 25th alloy, wherein the alloy contains at least one of molybdenum, stone, copper, and nickel, each of which is at least 0.01% by weight. Alloys according to clauses, wherein the alloy comprises one or more of the following, expressed in weight percent: molybdenum from 2.2 to 3, silicon from 0.4 to 0.6, copper from 0.6 to 1, nickel from 11 to 13, and vanadium from 0.2 to 0.4 , Tungsten from 0 to 1.8. 28. An anti-corrosion and invasion alloy containing, expressed in weight%: chromium from 31.5 to 33, nitrogen from 0.45 to 0.65, manganese from 7 to 9, carbon from 0.6 to 0.85, boron from 0 to 4.5, Molybdenum is from 0 to 5, silicon is from 0 to 3, copper is from 0 to 4, cobalt is from 0 to 4, and nickel is from 0 to 14. The alloy further contains from 0 to 2% of W, H, N, N, T , Yan, niobium, aluminum, calcium and rare earth elements, the rest containing iron and unavoidable impurities, 37 200538560 The alloy has a microstructure containing chromium carbides, nitrides and optional boride in one In the austenite matrix, the matrix has a face-centered cubic crystal structure and is oversaturated by nitrogen in the form of a solid solution. The composition of the alloy satisfies the following relationship:% M +% Co +0.5 (% Μη +% Cu) +30 (% N-^-% C) + 5x% B $ Ψ〇Cr +% Mo -l ·% Si + l, 5 (% Τί +% Τα +% ν -l ·% Nb +% Ce +% Al) ~ 0 10 29. The alloy of claim 28, wherein the alloy contains at least one of molybdenum, stone, side, copper, and nickel, each in an amount of at least 0.01% by weight. 30. The alloy of claim 28 or 29, wherein the alloy contains one or more of the following in terms of weight percent: molybdenum from 2.2 to 3, silicon from 0.4 to 0.6, copper from 0.8 to 1.2, and nickel from 11 By 13, vanadium is from 0.8 to 1.2, and magnesium is from 0 to 0.05. 31. An anti-corrosion and erosion alloy containing, expressed in weight percent: chromium from 37.5 to 42, nitrogen from 0.45 to 0.6, manganese from 7.5 to 12, carbon from 1.5 to 1.7, boron from 0 to 4.5, and molybdenum from 0 to 5, 38 20 200538560 silicon from 0 to 3, copper from 0 to 4, cobalt from 0 to 4, nickel from 0 to 14, 5 10 The alloy further contains rhenium, vanadium, hafnium, titanium, tantalum, tungsten, niobium, aluminum, calcium, and rare earth elements from 0 to 2%, and the rest contains iron and unavoidable impurities. The alloy has a microstructure, The microstructure contains chromium carbides, nitrides, and optional boride in an austenite matrix, which has a face-centered cubic crystal structure and is oversaturated by nitrogen in the form of a solid solution. The composition of the alloy satisfies The following relationships:% M +% Co +0.5 (% Μη +% Cu) +30 (% N +% C) + 5x% B 5% Cr -f% Mo -f% 5 / + 1.5 (% Γ / +% +% V +% Nb +% Ce +% A /) ~ 〇32. The alloy of item 31 in the scope of patent application, wherein the alloy contains at least one of molybdenum, silicon, boron, copper, and nickel, each presenting one An amount of at least αοwt%. 15 33. The alloy of claim 31 or 32, wherein the alloy contains one or more of the following in terms of weight percent: molybdenum from 1.5 to 2.2, silicon from 0.5 to 0.8, copper from 0.8 to 1.5, 20 nickel From 9 to 14, vanadium from 0.15 to 0.25 and tungsten from 0.5 to 0.8. 34. An alloy of anti-corrosion and money invasion, containing, expressed in weight%: 39 200538560 5 10 15 Chromium from 32 to 46, nitrogen from 0.35 to 0.75, manganese from 4.5 to 25, carbon from 1.1 to 2.6, boron from 0 to 4.5, molybdenum from 0 to 5, silicon from 0 to 3, copper from 0 to 4, and cobalt from 0 to 4, nickel from 0 to 25, tungsten from 0 to 2.5, the alloy further contains 0 to 2% of hafnium, vanadium, hafnium, titanium, tantalum, tungsten, niobium, aluminum, calcium and rare earth elements, and the rest are Containing iron and unavoidable impurities, the alloy has a microstructure that contains chromium carbides, nitrides, and optional borides in an austenite matrix that has a face-centered cubic crystal structure and is Nitrogen in the form of a solid solution is oversaturated, and the composition of the alloy satisfies the following relationship:% M +% Co + 0.5 (% Mn +% Cu) + 30 (% Ν + Ψ〇〇 + 5χ% B, 5% Cr + % Mo +% 5 / + 1.5 (% Ti +% Ta +% V +% Nb -f% Ce +% Al) ~ 〇35. For example, the alloy in the scope of patent application No. 34, wherein the alloy contains molybdenum, 20 silicon, At least one of boron, copper, and nickel is each in an amount of at least 0.01% by weight. 36. The alloy of claim 34 or 35, wherein the alloy contains one or more of the following expressed in weight% 402005385605 10 15 20 Silicon from 0.2 to 2.5, nickel from 9 to 14, vanadium from 0.15 to 0.25, and tungsten from 0.5 to 0.8. 37. An anti-corrosion # and invasion # alloy containing, expressed in weight%: chromium from 27 to 34, nitrogen from 0.3 to 0.6, manganese from 6 to 15, carbon from 0.25 to 1.2, boron from 0 to 4.5, Molybdenum from 0 to 5, silicon from 0 to 3, copper from 0 to 6, cobalt from 0 to 4, nickel from 0 to 18, tungsten from 0 to 2.5, the alloy further contains from 0 to 2% , Hafnium, titanium, titanium, titanium, niobium, aluminum, calcium, and rare earth elements, the rest containing iron and unavoidable impurities, the alloy has a microstructure containing chromium carbides, nitrides, and optional The boride is in an austenite matrix, which has a face-centered cubic crystal structure and is oversaturated by nitrogen in the form of a solid solution. The composition of the alloy satisfies the following relationship:% Μ +% Co + 0.5 (% Μη +% C w) +3 0 (% 7V +% C) +5 X% 5% Cr +% Mo +% Si + l.5 (% Ti +% Ta +% V ^% Nb +% Ce + 9cAl) 41 200538560 38 · If you apply The alloy of claim 37, wherein the alloy comprises at least one of molybdenum, silicon boron, steel, and nickel, each in an amount of at least 0.001% by weight. 39 · ^ The alloy of the 37th or 38th patent application scope, wherein the alloy contains one or more of the following expressed in% by weight: silicon from 0.2 to 2, nickel from 6 to 16, copper from 1 to 6, 10 Vanadium from 0.15 to 0.25 and tungsten from 0.5 to 0.8. Any of items 1 to 39. 40.-A kind of tungsten piece 'The casting contains an alloy as described in the patent application. 41. A slurry pump component, the alloy of any one of the component packages. Including items 1 to 39 of the scope of patent application 15 42. According to the 35th part of the patent application, the pusher, extinguishing line, conduit, and aging towel of the part. 42 200538560 VII. Designated Representative Map: (1) The designated representative map in this case is: (). (2) Brief description of the component symbols in this representative figure: • None 8. If there is a chemical formula in this case, please disclose the chemical formula that can best show the characteristics of the invention: None 4