CN110919235A - Welding wire for stainless steel welding - Google Patents
Welding wire for stainless steel welding Download PDFInfo
- Publication number
- CN110919235A CN110919235A CN201911296938.1A CN201911296938A CN110919235A CN 110919235 A CN110919235 A CN 110919235A CN 201911296938 A CN201911296938 A CN 201911296938A CN 110919235 A CN110919235 A CN 110919235A
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- welding
- welding wire
- steel
- wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
- B23K2103/05—Stainless steel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to a welding wire for stainless steel welding. Specifically, the invention relates to an austenitic stainless steel welding wire for stainless steel welding, which is characterized by comprising the following chemical components in percentage by weight: 0.015-0.10% of C, 0.30-1.1% of Si, 1.2-2.3% of Mn, less than or equal to 0.03% of P, less than or equal to 0.015% of S, 9.5-13.5% of Ni, 18.2-27.0% of Cr, 0.04-0.08% of N, 0.05-0.25% of V, 0.1-0.3% of W and the balance of Fe. The welding wire is a solid welding wire, and phi of the welding wire is 1.0-2.0 mm. The austenitic stainless steel welding wire for stainless steel welding has one or more of the following properties: the stainless steel welding process has the advantages of excellent welding process performance, good welding bead surface forming, smoothness, no corrugation, good corrosion resistance, qualified and stable strength and toughness performance, and is suitable for stainless steel welding.
Description
Technical Field
The invention relates to a welding material for stainless steel welding, in particular to an austenitic stainless steel welding wire for stainless steel welding, and specifically relates to the austenitic stainless steel welding wire for stainless steel welding, which is a solid welding wire.
Background
Stainless steels are a class of high alloy steels with alloying systems such as Fe-Cr, Fe-Cr-C and Fe-Cr-Ni. The stainless steel not only has obvious corrosion resistance, but also has excellent strength and plasticity and toughness. The material is widely applied as an acid-resistant, alkali-resistant, high-temperature-resistant and low-temperature-resistant material in industries such as petrochemical industry, fiber industry, food industry, power stations, pharmacy and the like.
The prior austenitic stainless steel welding wire for stainless steel welding has the problems of poor corrosion resistance, unqualified strength and toughness and the like easily occurring in the weld metal at the joint after welding, so that the potential hazard of the welding wire in industrial application is large, and the welding wire can not meet the requirements generally in the occasions requiring high welding quality.
CN107662064A (Chinese patent application No. 201711137641.1) discloses a 900 MPa-grade gas shielded solid welding wire for welding, which comprises the following components in percentage by mass: 0.05 to 0.11 percent; si: 0.50-0.80%; mn: 1.40-1.80%; p is less than 0.015 percent; s is less than 0.010 percent; mo: 0.30-0.60%; ti: 0.05 to 0.12 percent; ni: 2.0 to 3.0 percent; the balance being Fe. The gas shielded solid welding wire has the outstanding characteristics of good matching of the strength and the toughness of weld metal, high strength and high toughness.
CN108127291A (Chinese patent application No. 201711426146.2) discloses a heat-resistant steel solid welding wire for 650 ℃ ultra-supercritical thermal power generating units, which comprises the following chemical components: 0.06 to 0.13 percent of C, 0.55 to 0.95 percent of Mn0.50 percent, less than or equal to 0.50 percent of Si, less than or equal to 0.010 percent of P, less than or equal to 0.008 percent of S, 0.8 to 9.7 percent of Cr7, 2.5 to 3.5 percent of Co2, 2.5 to 3.5 percent of W, 0.02 to 0.12 percent of Nb0.12, 0.12 to 0.32 percent of V, 0.50 to 1.10 percent of Cu0.001 to 0.024 percent of B, 0.005 to 0.025 percent of N, and the balance of Fe and impurities. The welding process is good in performance, the tensile strength Rm of deposited metal is more than or equal to 680MPa under the heat treatment condition of 780 ℃ multiplied by 3h, and the normal temperature KV2 is more than or equal to 50J, so that the welding process is particularly suitable for welding the steel for the ultra-supercritical boiler unit, especially the martensite heat-resistant steel G115.
CN109807493A (Chinese patent application No. 201811392414.8) discloses a gas shielded solid welding wire for ultrahigh-strength engineering machinery steel plates, which comprises the following components in percentage by mass: c: 0.08-0.12%, Si: 0.70-0.90%, Mn: 1.65-1.85%, Cr: 0.45-0.65%, Ni: 2.3-2.5%, Mo: 0.40-0.70%, Ti: 0.08-0.15%, Zr: 0.04-0.08%, Nb: 0.05-0.10%, B: 0.004-0.006%, S: 0.005-0.015%, P is less than or equal to 0.010%, and the balance is iron and inevitable impurities. The invention also provides application of the gas shielded solid welding wire, which is used for welding the ultrahigh-strength engineering mechanical steel plate with tensile strength of 960 MPa. The welding seam formed by welding the solid welding wire provided by the invention has the advantages of good low-temperature impact toughness, low yield ratio, high strength, attractive appearance and the like; the welding spatter is small, and the welding process performance is excellent; the argon-rich (80% Ar + 20% CO2) gas shielded welding is adopted, the yield ratio of deposited metal is less than or equal to 0.9, and the welding method is suitable for welding Q890 and other ultrahigh-strength engineering mechanical steel plates with tensile strength of 960 MPa.
The patent CN101352786B (Chinese patent No. 200810223089.2) of the applicant discloses a submerged arc welding wire for stainless steel, which comprises the following chemical components in percentage by mass: less than or equal to 0.15 percent of C, less than or equal to 0.60 percent of Si, 1.0 to 2.5 percent of Mn, less than or equal to 0.03 percent of P, less than or equal to 0.015 percent of S, 8.0 to 10.0 percent of Ni, 25.0 to 28.0 percent of Cr, less than or equal to 0.55 percent of Mo, less than or equal to 0.75 percent of Cu, less than or equal to 0.5 percent of Cu, and the balance of Fe. Compared with the prior art, the nickel content is reduced, the cost is saved, the chromium content is increased, the anti-cracking performance is better, and the applicability of the welding material is improved. The invention has strong oxidation resistance, vulcanization resistance and corrosion resistance, good crack resistance, high welding efficiency and good welding performance, and can improve the high-temperature durability of a welding joint, thereby prolonging the service life of a weldment. However, the inventors have found that the concepts of these prior documents and their solutions are not effective in controlling the nitrogen content of the wire when used in the wire of the present invention containing specified amounts of vanadium and tungsten.
In order to solve the above problems, it is imperative to develop an austenitic stainless steel welding wire which is beautiful in weld bead surface formation, good in corrosion resistance, qualified in strength and toughness, and stable.
Disclosure of Invention
The invention aims to provide an austenitic stainless steel welding wire for stainless steel welding. The welding wire has one or more of the following properties: the stainless steel welding process has the advantages of excellent welding process performance, good welding bead surface forming, smoothness, no corrugation, good corrosion resistance, qualified and stable strength and toughness performance, and is suitable for stainless steel welding. It has been unexpectedly discovered that welding wires having the compositions of the present invention exhibit superior performance after welding in one or more of the above-described aspects, and the present invention has been completed based on such discovery.
The invention is realized by the following technical scheme:
in a first aspect of the invention, the invention provides an austenitic stainless steel welding wire for stainless steel welding, which comprises the following chemical components in percentage by weight: 0.015-0.10% of C, 0.30-1.1% of Si, 1.2-2.3% of Mn, less than or equal to 0.03% of P, less than or equal to 0.015% of S, 9.5-13.5% of Ni, 18.2-27.0% of Cr, 0.04-0.08% of N, 0.05-0.25% of V, 0.1-0.3% of W and the balance of Fe.
The inventors have found that a suitable amount of carbon provides the weld metal with a better heat resistance. If the carbon content is more than 0.10%, the thermal cracking resistance is lowered and the corrosion resistance is lowered. When the carbon content is too low, the strength of the weld metal is affected, and it has also been found that it is preferable to control the carbon content to 0.015 to 0.10%.
The present inventors have found that as a ferrite forming element, the content of silicon increases, the ferrite content increases, and excessively high ferrite is disadvantageous for impact toughness. An amount of silicon is advantageous for improving the fluidity of the molten steel, and it has been found that it is preferable to control the silicon content to 0.30 to 1.1%.
The inventors have discovered that manganese, as an austenite forming element, can affect the strength and toughness of the weld metal. Manganese can limit the detrimental effects of sulfur and prevent hot cracks from forming in austenitic welds. If the manganese content in the weld metal is less than 1.2%, the weld metal strength is insufficient, and the toughness is reduced. If the manganese content in the weld metal is more than 2.3%, the weld metal strength and hardenability become excessive, resulting in a decrease in toughness, and it has been found that it is preferable to control the manganese content to 1.2 to 2.3%.
The present inventors have found that nickel has the effect of lowering the brittle transition temperature and thereby improving the toughness of the weld metal, and that nickel also has the effect of improving the heat resistance of the weld metal. If the amount of nickel in the weld metal is excessive, heat cracks are easily caused in the weld metal. The inventors have found that it is preferable to control the nickel content to 9.5-13.5%.
The inventors have found that the addition of chromium as a strong ferrite-forming element provides excellent assurance of the mechanical properties and corrosion resistance of the weld metal, and have found that it is preferable to control the chromium content to 18.2 to 27.0%.
The inventors have found that both sulfur and phosphorus easily cause hot cracks in the weld metal, are detrimental to corrosion resistance and toughness, and are controlled in the following amounts: s is less than or equal to 0.015 percent, and P is less than or equal to 0.03 percent, which is acceptable.
The inventors have found that nitrogen increases the stability of austenite in austenitic weld metals, suppresses carbide precipitation, has a favorable effect on weld metal sensitized intergranular corrosion and toughness, and that controlling the nitrogen content in an appropriate range is beneficial for improving the quality of the welding wire, and have found that the nitrogen content is controlled to be: 0.04 to 0.08% is preferred.
The inventors have found that V is capable of strengthening the weld metal, and it is preferable to control the content thereof to 0.05 to 0.25%.
The inventors have found that W is effective in improving the corrosion resistance of the weld metal, and also found that it is preferable to control the content thereof to 0.1 to 0.3%.
The austenitic stainless steel welding wire for stainless steel welding according to the first aspect of the invention comprises the following chemical components in percentage by weight:
(1) 0.032% of C, 0.36% of Si, 1.41% of Mn, 0.022% of P, 0.011% of S, 10.5% of Ni, 19.2% of Cr, 0.042% of N, 0.15% of V, 0.11% of W and the balance of Fe; or the one or more of the following components,
(2) 0.054% of C, 0.62% of Si, 1.75% of Mn, 0.020% of P, 0.012% of S, 12.6% of Ni, 23.5% of Cr, 0.075% of N, 0.07% of V, 0.21% of W and the balance of Fe; or the one or more of the following components,
(3) 0.06% of C, 0.46% of Si, 1.66% of Mn, 0.024% of P, 0.008% of S, 9.70% of Ni, 18.70% of Cr, 0.044% of N, 0.24% of V, 0.23% of W and the balance of Fe; or the one or more of the following components,
(4) 0.098% of C, 0.31% of Si, 2.27% of Mn, 0.018% of P, 0.006% of S, 9.58% of Ni, 26.52% of Cr, 0.042% of N, 0.25% of V, 0.11% of W and the balance of Fe; or the one or more of the following components,
(5) 0.017% of C, 1.08% of Si, 1.24% of Mn, 0.020% of P, 0.009% of S, 13.42% of Ni, 18.27% of Cr, 0.076% of N, 0.054% of V, 0.29% of W and the balance of Fe; or the one or more of the following components,
(6) 0.068% of C, 0.73% of Si, 1.82% of Mn, 0.019% of P, 0.007% of S, 11.03% of Ni, 22.73% of Cr, 0.063% of N, 0.142% of V, 0.22% of W and the balance of Fe.
The austenitic stainless steel welding wire for stainless steel welding according to the first aspect of the present invention is a solid wire.
The austenitic stainless steel welding wire for stainless steel welding according to the first aspect of the present invention is prepared as follows: the method comprises the following steps of (1) controlling the sulfur content of molten iron entering a furnace by adopting desulfurized molten iron, steelmaking by adopting a converter, adding raw materials with low sulfur and phosphorus contents and capable of obtaining the chemical component proportion, smelting to the specified level by adopting a top-bottom composite blowing process, deoxidizing and alloying, then adopting an external refining process of an LF furnace, smelting molten steel with components meeting requirements, casting the molten steel into a continuous casting blank in a full-protection manner by a variety casting machine, and rolling the continuous casting blank into a wire rod with phi of 4-7 mm by a high-speed non-twisting mill; and drawing the wire rod into a finished welding wire with phi of 0.5-2.5 mm. In one embodiment of the invention, the manganese-containing raw material is added after smelting by a top-bottom combined blowing process until carbon, sulfur and phosphorus are controlled to be at specified levels, namely, the preparation method comprises the following steps: the method comprises the following steps of controlling the sulfur content of molten iron entering a furnace by adopting desulfurized molten iron, steelmaking by adopting a converter, adding other raw materials which are low in sulfur and phosphorus and can obtain the chemical component proportion except for manganese-containing raw materials, smelting by adopting a top-bottom combined converting process until carbon, sulfur and phosphorus are controlled to be in specified levels, adding the manganese-containing raw materials, continuously smelting until the carbon, sulfur and phosphorus are confirmed to be in the specified levels, then carrying out deoxidation alloying, smelting molten steel with components meeting requirements by adopting an external refining process of an LF furnace, casting the molten steel into a continuous casting billet in a full-protection manner by using a variety casting machine, and rolling the continuous casting billet into a wire rod with phi of 4-7 mm by using a high-speed non-twisting mill; and drawing the wire rod into a finished welding wire with phi of 0.5-2.5 mm. It has been surprisingly found that the post-addition of manganese raw material results in a nitrogen content of more than 0.035% in the steel melt resulting from the smelting, whereas if manganese raw material is added with the rest of the material it results in a nitrogen content of less than 0.035%; of course, the nitrogen content must not be too high, and it is preferable to control the amount of the feed of the present invention to be less than 0.08%. The nitrogen content can be advantageously controlled within a desired range by the production method of the present invention.
The austenitic stainless steel welding wire for stainless steel welding according to the first aspect of the present invention, wherein the wire rod Φ is 5 to 6 mm.
The austenitic stainless steel welding wire for stainless steel welding according to the first aspect of the present invention, wherein the wire rod Φ is 5.5 mm. The Φ of the wire rod can be within the range described in the present invention without substantial influence on the quality of the final product; in the present embodiment, therefore, the wire rod Φ is manufactured to be 5.5mm, unless otherwise specified.
The austenitic stainless steel welding wire for stainless steel welding according to the first aspect of the present invention, wherein the finished welding wire Φ is 1.0 to 2.0 mm.
The austenitic stainless steel welding wire for stainless steel welding according to the first aspect of the present invention, wherein the finished welding wire Φ is 1.0 to 1.5 mm.
The austenitic stainless steel welding wire for stainless steel welding according to the first aspect of the present invention, wherein the finished welding wire Φ is 1.2 mm. The Φ of the finished wire can be within the ranges described herein without substantial impact on the quality of the final product; in the embodiment of the present invention, therefore, the finished welding wire Φ of 1.2mm is manufactured, unless otherwise specified.
According to the austenitic stainless steel welding wire for stainless steel welding of the first aspect of the present invention, the deposited metal chemical composition obtained by welding with the welding wire is composed of: 0.015-0.10% of C, 0.30-1.1% of Si, 1.2-2.3% of Mn, less than or equal to 0.03% of P, less than or equal to 0.015% of S, 9.5-13.5% of Ni, 18.2-27.0% of Cr, 0.04-0.08% of N, 0.05-0.25% of V, 0.1-0.3% of W and the balance of Fe.
Further, the present invention provides in a second aspect a method for producing an austenitic stainless steel welding wire for stainless steel welding according to any of the embodiments of the first aspect of the present invention, comprising the steps of: the method comprises the following steps of (1) controlling the sulfur content of molten iron entering a furnace by adopting desulfurized molten iron, steelmaking by adopting a converter, adding raw materials with low sulfur and phosphorus contents and capable of obtaining the chemical component proportion, smelting to the specified level by adopting a top-bottom composite blowing process, deoxidizing and alloying, then adopting an external refining process of an LF furnace, smelting molten steel with components meeting requirements, casting the molten steel into a continuous casting blank in a full-protection manner by a variety casting machine, and rolling the continuous casting blank into a wire rod with phi of 4-7 mm by a high-speed non-twisting mill; and drawing the wire rod into a finished welding wire with phi of 0.5-2.5 mm. In one embodiment, the method comprises the steps of: the method comprises the following steps of controlling the sulfur content of molten iron entering a furnace by adopting desulfurized molten iron, steelmaking by adopting a converter, adding other raw materials which are low in sulfur and phosphorus and can obtain the chemical component proportion except for manganese-containing raw materials, smelting by adopting a top-bottom combined converting process until carbon, sulfur and phosphorus are controlled to be in specified levels, adding the manganese-containing raw materials, continuously smelting until the carbon, sulfur and phosphorus are confirmed to be in the specified levels, then carrying out deoxidation alloying, smelting molten steel with components meeting requirements by adopting an external refining process of an LF furnace, casting the molten steel into a continuous casting billet in a full-protection manner by using a variety casting machine, and rolling the continuous casting billet into a wire rod with phi of 4-7 mm by using a high-speed non-twisting mill; and drawing the wire rod into a finished welding wire with phi of 0.5-2.5 mm.
In the above-described steps of the preparation method of the present invention, although the specific steps described therein are distinguished in some detail or in language description from the steps described in the preparation examples of the detailed embodiments below, those skilled in the art can fully summarize the above-described method steps in light of the detailed disclosure throughout the present disclosure.
Any embodiment of any aspect of the invention may be combined with other embodiments, as long as they do not contradict. Furthermore, in any embodiment of any aspect of the invention, any feature may be applicable to that feature in other embodiments, so long as they do not contradict. The invention is further described below.
All documents cited herein are incorporated by reference in their entirety and to the extent such documents do not conform to the meaning of the present invention, the present invention shall control. Further, the various terms and phrases used herein have the ordinary meaning as is known to those skilled in the art, and even though such terms and phrases are intended to be described or explained in greater detail herein, reference is made to the term and phrase as being inconsistent with the known meaning and meaning as is accorded to such meaning throughout this disclosure.
As used herein, the term "parts by weight" refers to the relative amounts of the components of the welding wire sheath of the present invention to each other, and may be in absolute amounts (e.g., mg, g, kg, etc.) or in weight percentages (e.g., wt%). Of course, when measured in weight percent (e.g., wt% or wt%), a preferred embodiment is where the sum of the components is 100%.
The materials used for the various components in the preparation of the welding wire of the present invention are not intended to be limiting, as long as they can be prepared to provide the composition and proportions of the components of the welding wire of the present invention, as is also well known in the art. It is also well known that the chemical composition of the welding wire of the present invention may, of course, involve one or some unavoidable impurities other than those mentioned herein, which are well known to those skilled in the art and acceptable, and that the welding wire of the present invention does not exclude them, although the present invention does not mention the composition of the welding wire.
The welding wires according to embodiments 1 to 6 of the present invention all exhibit excellent properties. In the supplementary tests carried out in the present invention, it was found that the technical effects described in examples 1 to 6 were difficult to obtain when the manufacturing process was slightly adjusted, and the following were specified. Supplemental test 1: referring to the chemical composition/formula and the preparation method of the welding wire in the embodiments 1 to 6 respectively, the difference is that the preparation process is changed as follows: the method comprises the steps of controlling the sulfur content of molten iron entering a furnace by adopting desulfurized molten iron, steelmaking by adopting a converter, adding raw materials with low sulfur and phosphorus contents and capable of obtaining the chemical component proportion, smelting to the specified level by adopting a top-bottom composite blowing process, deoxidizing and alloying, then adopting an external refining process of an LF furnace, smelting molten steel with components meeting requirements, fully protecting and casting the molten steel into a continuous casting billet by a variety casting machine, rolling the continuous casting billet into a wire rod with phi of 5.5mm by a high-speed non-twisting mill, and drawing the wire rod into finished welding wires with phi of 1.2mm in 6 batches; according to the chemical composition, the nitrogen content is in the range of 0.013-0.031%, for example, the nitrogen content of the welding wire obtained according to example 1 is 0.022%, which cannot reach more than 0.035%, and even cannot reach more than 0.04%; the 6 batches of welding wires prepared in the supplementary test 1 were welded to the V-groove stainless steel at the welding current of 120-160A according to the method of example 1, and as a result: the weld bead surfaces are formed generally, have unsatisfactory smoothness and are occasionally wrinkled, have tensile strength in the range of 398 to 483MPa (for example, 465MPa in the case of the wire obtained in reference example 1), have elongation after fracture in the range of 18 to 23% (for example, 19.3 in the case of the wire obtained in reference example 1), and have cracks due to intergranular corrosion in the sulfuric acid-copper sulfate corrosion test (2 to 5/10 in the case of the wire obtained in reference example 1, 3/10 in the case of the wire). These results indicate that the performance of the resulting wire is worse with the above described varying timing of the addition of individual materials.
Stainless Steel (Stainless Steel) is short for Stainless acid-resistant Steel, and Steel which is resistant to weak corrosive media such as air, steam and water or has Stainless property is called Stainless Steel; and steel grades that are resistant to corrosion by chemically corrosive media (chemical attacks such as acids, bases, salts, etc.) are called acid-resistant steels. Because of the difference in chemical composition between the two, the corrosion resistance of the two is different, and common stainless steel is generally not resistant to corrosion of chemical media, while acid-resistant steel is generally stainless. The term "stainless steel" refers not only to a single type of stainless steel, but also to more than a hundred types of industrial stainless steels, each of which has been developed to have good properties in its particular application field.
Stainless steel is often classified into: martensitic steel, ferritic steel, austenitic-ferritic (duplex) stainless steel, precipitation hardening stainless steel, and the like. In addition, the paint can be divided into the following components: chromium stainless steel, chromium nickel stainless steel, chromium manganese nitrogen stainless steel and the like. There are also special stainless steels for pressure vessels.
The ferritic stainless steel contains 15 to 30 percent of chromium. The corrosion resistance, toughness and weldability are improved along with the increase of chromium content, and the chloride stress corrosion resistance is superior to other stainless steels, and the chromium-containing stainless steels belong to the class of Crl7, Cr17Mo2Ti, Cr25, Cr25Mo3Ti, Cr28 and the like. The ferritic stainless steel has high chromium content, good corrosion resistance and oxidation resistance, but poor mechanical property and processing property, and is mainly used for acid-resistant structures with low stress and used as oxidation-resistant steel. The steel can resist the corrosion of atmosphere, nitric acid and salt solution, has the characteristics of good high-temperature oxidation resistance, small thermal expansion coefficient and the like, is used for nitric acid and food factory equipment, and can also be used for manufacturing parts working at high temperature, such as gas turbine parts and the like.
The austenitic stainless steel contains more than 18 percent of chromium, about 8 percent of nickel and a small amount of one or more elements such as molybdenum, titanium, nitrogen and the like. The comprehensive performance is good, and the paint can resist corrosion of various mediums. Common grades of austenitic stainless steel include 1Cr18Ni9, 0Cr19Ni9, and the like. The Wc of the 0Cr19Ni9 steel is < 0.08%, marked "0" in the steel number. Such steels contain a large amount of Ni and Cr, which makes the steel austenitic at room temperature. The steel has good plasticity, toughness, weldability, corrosion resistance and no magnetism or weak magnetism, has good corrosion resistance in oxidizing and reducing media, is used for manufacturing acid-resistant equipment, such as corrosion-resistant containers, equipment linings, conveying pipelines, nitric acid-resistant equipment parts and the like, and can also be used as a main body material of stainless steel clock ornaments. The austenitic stainless steel is generally subjected to solution treatment, namely, the steel is heated to 1050-1150 ℃, and then is cooled by water or air to obtain a single-phase austenitic structure.
The austenitic-ferritic duplex stainless steel has the advantages of both austenitic and ferritic stainless steels and possesses superplasticity. Stainless steel with austenite and ferrite structures accounting for about half of the total. Under the condition of low carbon content, the chromium (Cr) content is 18-28%, and the nickel (Ni) content is 3-10%. Some steels also contain alloying elements such as Mo, Cu, Si, Nb, Ti, N, etc. The steel has the characteristics of both austenitic stainless steel and ferritic stainless steel, and compared with ferrite, the steel has higher plasticity and toughness, no room temperature brittleness, obviously improved intergranular corrosion resistance and welding performance, and simultaneously keeps the characteristics of high 475 ℃ brittleness and heat conductivity coefficient, superplasticity and the like of the ferritic stainless steel. Compared with austenitic stainless steel, the strength is high, and the intergranular corrosion resistance and the chloride stress corrosion resistance are obviously improved. The duplex stainless steel has excellent pitting corrosion resistance and is also a nickel-saving stainless steel.
The matrix of the precipitation hardening stainless steel is austenite or martensite, and the common grade of the precipitation hardening stainless steel is 04Cr13Ni8Mo2Al, etc. Stainless steel which can be hardened (strengthened) by a precipitation hardening (also known as age hardening) process.
Martensitic stainless steels have high strength but poor plasticity and weldability. The martensite stainless steel has the common brands of 1Cr13, 3Cr13 and the like, has higher strength, hardness and wear resistance due to higher carbon content, but has slightly poor corrosion resistance, and is used for parts with higher mechanical property requirements and common corrosion resistance requirements, such as springs, turbine blades, hydraulic press valves and the like. This type of steel is used after quenching and tempering. Annealing is required after forging and stamping.
In stainless steel plates and steel strips for pressure equipment, stainless steel special for pressure containers has clear requirements on classification, code, size, appearance, allowable deviation, technical requirements, test methods, inspection rules, packaging, marks, product quality certificates and the like. Common trademarks are 06Cr19Ni10 and 022Cr17Ni12Mo2 numerical codes: s30408, S31603, and the like. The device is mainly used for sanitary equipment such as food machinery and pharmaceutical machinery.
Most stainless steel products require good corrosion resistance, like first and second kinds of tableware, kitchen ware, water heaters, water dispensers and the like, some foreign merchants also perform corrosion resistance tests on the products: heating NACL water solution to boil, pouring out the solution after a period of time, washing, drying, and losing weight to determine the corrosion degree.
The heat resistance refers to that the stainless steel can still maintain excellent physical and mechanical properties at high temperature. Influence of carbon: carbon is strongly formed and stable in austenitic stainless steels. An element which fixes austenite and expands the austenite region. Carbon has about 30 times of the capability of forming austenite as much as nickel, and carbon is an interstitial element, and the strength of austenitic stainless steel can be remarkably improved through solid solution strengthening. Carbon also improves the stress and corrosion resistance of austenitic stainless steels in high chloride concentrations (e.g., 42% MgCl2 boiling solution). However, in austenitic stainless steels, carbon is often considered a detrimental element, mainly due to the fact that under some conditions in stainless steel corrosion resistant applications (such as welding or heating at 450-850 ℃), carbon may form high chromium Cr23C6 type carbon compounds with chromium in the steel leading to a local chromium depletion, which degrades the corrosion resistance, in particular the intergranular corrosion resistance, of the steel. Thus. Most of the newly developed chrome-nickel austenitic stainless steels since the 60 s are ultra-low carbon type with the carbon content of less than 0.03% or 0.02%, and it can be known that the intergranular corrosion sensitivity of the steel is reduced with the reduction of the carbon content, and the most obvious effect is achieved when the carbon content is less than 0.02%. Due to the harmful effect of carbon, the carbon content is controlled as low as possible in the smelting process of austenitic stainless steel, and the surface of the stainless steel is prevented from being carburized in the subsequent processes of heat treatment, cold working, heat treatment and the like, so that the precipitation of chromium carbide is avoided.
When the atomic number of chromium in the steel is not less than 12.5%, the electrode potential of the steel can be mutated and increased from negative potential to positive electrode potential. Preventing electrochemical corrosion. The corrosion resistance of stainless steel decreases with increasing carbon content, so most stainless steels contain less carbon up to 1.2%, and some steels have ω c (carbon content) even lower than 0.03% (e.g. 00Cr 12). The main alloying element in stainless steel is Cr (chromium), and the steel has corrosion resistance only when the Cr content reaches a certain value. Therefore, stainless steels generally have a Cr (chromium) content of at least 10.5%.
Stainless steels are classified by composition into Cr series (400 series), Cr-Ni series (300 series), Cr-Mn-Ni (200 series), heat-resistant chromium alloy steels (500 series), and precipitation hardening series (600 series). 200 series: chromium-manganese-nickel, such as 201,202, etc., has poor corrosion resistance when replacing nickel with manganese, and is widely used as a 300-series cheap substitute in China. 300 series: austenitic chromium-nickel stainless steel. For example, 301: good ductility and is used for forming products. It can also be rapidly hardened by machining. The weldability is good. The abrasion resistance and the fatigue strength are better than those of 304 stainless steel. 302: the corrosion resistance is the same as 304, and the strength is better because the carbon content is relatively high. 303: the small amount of sulfur and phosphorus is added to make the cutting processing easier than that of 304. 304: a general model; namely 18/8 stainless steel. The product is as follows: corrosion resistant containers, tableware, furniture, railings, medical equipment. The standard composition is 18% chromium plus 8% nickel. The stainless steel is non-magnetic and cannot change the metallographic structure by a heat treatment method. GB is 0Cr18Ni 9. 304L: the same characteristics as 304, but low carbon makes it more corrosion resistant and easy to heat treat, but the mechanical property is inferior and it is suitable for welding and difficult to heat treat. 304N: the stainless steel has the same characteristics as 304, and is nitrogen-containing stainless steel, and nitrogen is added to improve the strength of the steel. 309: compared with 304, the material has better temperature resistance, and can resist the temperature up to 980 ℃. 309S: the product has a large amount of chromium and nickel, so the product has good heat resistance and oxidation resistance, and the product is as follows: heat exchanger, boiler spare part, jet engine. 310: the high-temperature oxidation resistance is excellent, and the maximum service temperature is 1200 ℃. 316: after 304, the second most widely used steel grade, mainly used in the food industry, horological decorations, pharmaceutical industry and surgical instruments, has been added molybdenum to obtain a specific structure resistant to corrosion. It is also used as "marine steel" because of its better resistance to chloride corrosion than 304. SS316 is typically used in nuclear fuel recovery plants. Grade 18/10 stainless steel also generally meets this application grade. 316L: low carbon, corrosion resistance and easy heat treatment, and the products are as follows: chemical processing equipment, nuclear power generators and refrigerant grain storage. 321: the other properties are similar to 304, except that the risk of corrosion of the material weld is reduced due to the addition of titanium element. 347: the addition of the stabilizing element niobium is suitable for welding aviation appliance parts and chemical equipment. 400 series: ferrite and martensitic stainless steel, without manganese, can replace 304 stainless steel to a certain extent. 408: good heat resistance, weak corrosion resistance, 11% of Cr and 8% of Ni. 409: the cheapest model (in the united states), commonly used as automobile exhaust pipe, is ferritic stainless steel (chrome steel). 410: martensite (high strength chromium steel) has good wear resistance and poor corrosion resistance. 416: the addition of sulfur improves the processability of the material. 420: "cutter grade" martensitic steels, like the earliest stainless steels of the Brinell high chromium steels. Also used for surgical knife, can be made very bright. 430: ferritic stainless steel for decorative use, for example for automobile ornaments. Good formability, but poor temperature and corrosion resistance. 440: the high-strength cutting tool steel contains a little carbon, can obtain higher yield strength after proper heat treatment, has the hardness of 58HRC, and belongs to the hardest stainless steel. The most common example of an application is the "razor blade". Three types are commonly used: 440A, 440B, 440C, and 440F (easy processing type). 500 series: heat resistant chromium alloy steel. 600 series: martensitic precipitation hardening stainless steel.
Stainless steel is a very thin, strong, fine, and stable chromium-rich oxide film (protective film) formed on its surface. Preventing oxygen atoms from continuously permeating into the solution and continuously oxidizing to obtain the anti-rusting capability. Once the film is damaged for some reason, oxygen atoms in air or liquid are separated out continuously to form loose ferric oxide, and the metal surface is rusted continuously. Austenitic steel sheets, whether stainless steel sheets or heat-resistant steel sheets, are best in combination properties, having both sufficient strength and excellent plasticity, and also not high in hardness, which is one of the reasons why they are widely used. The austenitic stainless steel is similar to most other metal materials, and the tensile strength, yield strength and hardness of the austenitic stainless steel are improved along with the reduction of the temperature; the plasticity decreases with decreasing temperature. The tensile strength of the alloy is uniformly increased within the temperature range of 15-80 ℃. More importantly: as the temperature decreases, its impact toughness decreases slowly and no brittle transition temperature exists. The stainless steel can maintain sufficient plasticity and toughness at low temperature. The heat resistance of the stainless steel refers to the heat stability which is the performance of resisting oxidation or gas medium corrosion at high temperature.
The corrosion resistance of austenitic stainless steel is mainly due to the fact that chromium promotes passivation of the steel and keeps the steel in a stable and passive state under the action of chromium, ○ chromium has an influence on the structure, chromium is an element which strongly forms and stabilizes iron, the austenite region is reduced, a ferrite (delta) structure can appear in the austenitic stainless steel as the content of the steel increases, the study shows that in the austenitic nickel-chromium austenitic stainless steel, when the content of carbon is 0.1% and the content of chromium is 18%, the minimum content of nickel is required to obtain a stable single austenitic structure, which is about 8%, as far as the usual austenitic stainless steel of the 18 Cr-8 Ni type chromium nickel-nickel type is an austenitic stainless steel, chromium content is most suitable, chromium is a steel with the highest tendency to form intermetallic phases (such as delta phase) as the chromium content increases, when the content of chromium is increased, the steel contains molybdenum, the chromium content of chromium is increased, the austenite phase (such as the delta phase) has a tendency to form a significant corrosion resistance to corrosion, and the corrosion resistance of austenitic chromium is improved under the conditions of corrosion of austenite-corrosion, such as the corrosion resistance of austenitic chromium corrosion of martensite corrosion, the corrosion resistance of austenite-corrosion of austenite-chromium, the corrosion of stainless steel is not only increased, but the corrosion, the corrosion resistance of austenite-corrosion of austenite stainless steel, and the corrosion of austenite stainless steel, and the corrosion resistance of chromium (molybdenum-chromium) is not only increased, the corrosion resistance of austenite stainless steel, the corrosion of ferrite-chromium) under the corrosion resistance of austenite stainless steel, the corrosion of austenite stainless steel is not only the corrosion medium is increased, and the corrosion resistance of the corrosion of austenite stainless steel is increased, the corrosion of the corrosion resistance of ferrite-chromium (i.e.g. molybdenum-chromium) under the corrosion resistance of high-chromium, the corrosion resistance of ferrite corrosion resistance of the corrosion of high-chromium, the corrosion of stainless steel, the corrosion resistance of stainless steel is not only the corrosion of stainless steel, the corrosion of stainless steel is increased, the corrosion resistance of stainless steel is increased, the corrosion of the martensite corrosion of the steel is not increased, the martensite, the corrosion of the martensite corrosion of the steel is not increased, the martensite, the corrosion of the martensite, the martensite corrosion of the martensite, the martensite corrosion resistance of the martensite, the martensite.
Nickel is an element that strongly stabilizes austenite and enlarges the austenite phase region, and in order to obtain a single austenite structure, the minimum nickel content required when the steel contains 0.1% of carbon and 18% of chromium is about 8%, which is the basic component of the most famous 18-8 chromium-nickel austenitic stainless steel in which residual ferrite is completely eliminated and the tendency of sigma phase formation is remarkably reduced as the nickel content increases; at the same time, the martensitic transformation temperature is reduced and even the lambda → M phase transformation may not occur, but an increase in the nickel content reduces the solubility of carbon in austenitic stainless steels, thereby increasing the carbide precipitation tendency. It is known that the influence of nickel on the mechanical properties of austenitic stainless steels, in particular of chromium-nickel austenitic stainless steels, is mainly determined by the influence of nickel on the stability of austenite, that within the range of nickel content in which martensitic transformation may occur in the steel, the strength of the steel decreases and the plasticity increases with increasing nickel content, that chromium-nickel austenitic stainless steels with a stable austenitic structure have very good toughness (including very low temperature toughness) and can therefore be used as low temperature steels, and that the addition of nickel can further improve the toughness of chromium-manganese austenitic stainless steels with a stable austenitic structure. The nickel can also obviously reduce the cold work hardening tendency of the austenitic stainless steel, which is mainly due to the fact that the stability of austenite is increased, the martensite transformation in the cold working process is reduced or eliminated, meanwhile, the cold work hardening effect on the austenite is not obvious, the influence of the cold work hardening tendency of the stainless steel is reduced, the nickel reduces the cold work hardening rate of the austenitic stainless steel, reduces the room temperature and low temperature strength of the steel, improves the plasticity, determines the cold work forming performance of the austenite stainless steel which is beneficial to the improvement of the nickel content, increases the nickel content and also reduces the delta ferrite in the 18-8 and 17-14-2 type chromium-nickel austenitic stainless steel so as to improve the hot working performance of the stainless steel, however, the reduction of the delta ferrite has the disadvantages on the weldability of the steel types, increases the crack tendency of a welding hot wire, and in addition, the nickel can also obviously improve the hot working performance of the chromium-manganese-nitrogen (chromium-manganese-nickel-nitrogen) austenitic stainless, the improvement of the nickel content leads to an increase in the susceptibility to intergranular stress corrosion of the steel and the alloy under certain conditions in high-temperature and high-pressure water, but this adverse effect is reduced or suppressed by the increase in the chromium content of the steel and the alloy, the critical carbon content of which leads to intergranular corrosion is reduced with the increase in the nickel content of the austenitic magnetic card stainless steel, that is, the intergranular corrosion sensitivity of steel is increased, the effect of nickel is not significant as to the resistance to pitting corrosion and crevice corrosion of austenitic stainless steel, and in addition, nickel also increases the high-temperature oxidation resistance of austenitic stainless steel, which is mainly due to low-melting nickel sulfide at grain boundaries in steel, the structure and performance are reduced as nickel improves, and the higher the nickel content is, the more harmful it is, generally, simple chromium nickel (and chromium manganese nitrogen) austenitic stainless steel is used only under the use condition that stainless and oxidation resistant media (such as nitric acid and the like) are required, molybdenum is added to steel as an important alloy element in austenitic stainless steel to further expand the use range, and the effect of molybdenum is mainly to increase the steel in reducing media.
By adjusting the component proportion of the welding wire, the austenitic stainless steel welding wire for stainless steel welding designed by the invention has excellent welding process performance, good welding bead surface forming, smoothness, no wrinkling, good corrosion resistance, qualified and stable strength and toughness performance, and is suitable for stainless steel welding. Effectively solving the defects existing in the traditional welding wire of the same type.
Detailed Description
The present invention will be further described by the following examples, however, the scope of the present invention is not limited to the following examples. It will be understood by those skilled in the art that various changes and modifications may be made to the invention without departing from the spirit and scope of the invention. The present invention has been described generally and/or specifically with respect to materials used in testing and testing methods. Although many materials and methods of operation are known in the art for the purpose of carrying out the invention, the invention is nevertheless described herein in as detail as possible.
Example 1: preparation of austenitic stainless steel welding wire
The welding wire comprises the following chemical components in percentage by weight: 0.032% of C, 0.36% of Si, 1.41% of Mn, 0.022% of P, 0.011% of S, 10.5% of Ni, 19.2% of Cr, 0.042% of N, 0.15% of V, 0.11% of W and the balance of Fe.
The preparation method comprises the following steps: the method comprises the following steps of controlling the sulfur content of molten iron entering a furnace by adopting desulfurized molten iron, steelmaking by adopting a converter, adding other raw materials which are low in sulfur and phosphorus and can obtain the chemical component proportion except for manganese-containing raw materials, smelting by adopting a top-bottom combined converting process until carbon, sulfur and phosphorus are controlled to be in specified levels, adding the manganese-containing raw materials, continuously smelting until the carbon, sulfur and phosphorus are confirmed to be in the specified levels, then carrying out deoxidation alloying, smelting molten steel with components meeting requirements by adopting an external refining process of an LF furnace, casting the molten steel into a continuous casting billet in a full-protection manner by using a variety casting machine, and rolling the continuous casting billet into a wire rod with phi of 5.5mm by using a high-speed non-twisting mill; and drawing the wire rod into a finished welding wire with phi of 1.2mm, which is a solid welding wire.
The austenitic stainless steel welding wire for welding the stainless steel prepared in the embodiment is used for welding the V-shaped groove stainless steel at the welding current of 120-160A, and as a result: the welding wire has excellent welding technological performance, and the welding bead has good surface forming, is smooth and has no wrinkle. Deposited metal mechanical property: tensile strength of 610MPa and elongation after fracture (GB/T228-2002) of 32 percent. The corrosion resistance test is carried out by using a stainless steel sulfuric acid-copper sulfate corrosion test method (GB/T4334.5-2000) which is well known in the field, and the results are as follows: after bending, the outer surface of the bent test piece was observed under a magnifying glass of 10 times, and no intergranular corrosion cracks were observed (0/10, which means that 0 intergranular corrosion cracks were observed in 10 tests, and the data in this document have similar meanings), and the corrosion resistance was acceptable.
Example 2: preparation of austenitic stainless steel welding wire
The welding wire comprises the following chemical components in percentage by weight: 0.054% of C, 0.62% of Si, 1.75% of Mn, 0.020% of P, 0.012% of S, 12.6% of Ni, 23.5% of Cr, 0.075% of N, 0.07% of V, 0.21% of W and the balance of Fe. A welding wire was prepared according to the method of example 1.
The austenitic stainless steel welding wire for welding the stainless steel prepared in the embodiment is used for welding the V-shaped groove stainless steel at the welding current of 120-160A, and as a result: the welding wire has excellent welding technological performance, and the welding bead has good surface forming, is smooth and has no wrinkle. Deposited metal mechanical property: the tensile strength is 630MPa, and the elongation after fracture is 31 percent. The corrosion resistance test is carried out by using a stainless steel sulfuric acid-copper sulfate corrosion test method (GB/T4334.5-2000) which is well known in the field, and the results are as follows: after bending, the outer surface of the bent sample is observed under a magnifying glass of 10 times, no crack (0/10) caused by intergranular corrosion is seen, and the corrosion resistance is qualified.
Example 3: preparation of austenitic stainless steel welding wire
The welding wire comprises the following chemical components in percentage by weight: 0.06% of C, 0.46% of Si, 1.66% of Mn, 0.024% of P, 0.008% of S, 9.70% of Ni, 18.70% of Cr, 0.044% of N, 0.24% of V, 0.23% of W and the balance of Fe. A welding wire was prepared according to the method of example 1.
The austenitic stainless steel welding wire for welding the stainless steel prepared in the embodiment is used for welding the V-shaped groove stainless steel at the welding current of 120-160A, and as a result: the welding wire has excellent welding technological performance, and the welding bead has good surface forming, is smooth and has no wrinkle. Deposited metal mechanical property: the tensile strength is 650MPa, and the elongation after fracture is 30%. The corrosion resistance test is carried out by using a stainless steel sulfuric acid-copper sulfate corrosion test method (GB/T4334.5-2000) which is well known in the field, and the results are as follows: after bending, the outer surface of the bent sample is observed under a magnifying glass of 10 times, no crack (0/10) caused by intergranular corrosion is seen, and the corrosion resistance is qualified.
Example 4: preparation of austenitic stainless steel welding wire
The welding wire comprises the following chemical components in percentage by weight: 0.098% of C, 0.31% of Si, 2.27% of Mn, 0.018% of P, 0.006% of S, 9.58% of Ni, 26.52% of Cr, 0.042% of N, 0.25% of V, 0.11% of W and the balance of Fe. A welding wire was prepared according to the method of example 1.
The austenitic stainless steel welding wire for welding the stainless steel prepared in the embodiment is used for welding the V-shaped groove stainless steel at the welding current of 120-160A, and as a result: the welding wire has excellent welding technological performance, and the welding bead has good surface forming, is smooth and has no wrinkle. Deposited metal mechanical property: tensile strength is 645MPa, and elongation after fracture is 31%. The corrosion resistance test is carried out by using a stainless steel sulfuric acid-copper sulfate corrosion test method (GB/T4334.5-2000) which is well known in the field, and the results are as follows: after bending, the outer surface of the bent sample is observed under a magnifying glass of 10 times, no crack (0/10) caused by intergranular corrosion is seen, and the corrosion resistance is qualified.
Example 5: preparation of austenitic stainless steel welding wire
The welding wire comprises the following chemical components in percentage by weight: 0.017% of C, 1.08% of Si, 1.24% of Mn, 0.020% of P, 0.009% of S, 13.42% of Ni, 18.27% of Cr, 0.076% of N, 0.054% of V, 0.29% of W and the balance of Fe. A welding wire was prepared according to the method of example 1.
The austenitic stainless steel welding wire for welding the stainless steel prepared in the embodiment is used for welding the V-shaped groove stainless steel at the welding current of 120-160A, and as a result: the welding wire has excellent welding technological performance, and the welding bead has good surface forming, is smooth and has no wrinkle. Deposited metal mechanical property: tensile strength 663MPa, and elongation after fracture 30%. The corrosion resistance test is carried out by using a stainless steel sulfuric acid-copper sulfate corrosion test method (GB/T4334.5-2000) which is well known in the field, and the results are as follows: after bending, the outer surface of the bent sample is observed under a magnifying glass of 10 times, no crack (0/10) caused by intergranular corrosion is seen, and the corrosion resistance is qualified.
Example 6: preparation of austenitic stainless steel welding wire
The welding wire comprises the following chemical components in percentage by weight: 0.068% of C, 0.73% of Si, 1.82% of Mn, 0.019% of P, 0.007% of S, 11.03% of Ni, 22.73% of Cr, 0.063% of N, 0.142% of V, 0.22% of W and the balance of Fe. A welding wire was prepared according to the method of example 1.
The austenitic stainless steel welding wire for welding the stainless steel prepared in the embodiment is used for welding the V-shaped groove stainless steel at the welding current of 120-160A, and as a result: the welding wire has excellent welding technological performance, and the welding bead has good surface forming, is smooth and has no wrinkle. Deposited metal mechanical property: tensile strength is 660MPa, and elongation after fracture is 33%. The corrosion resistance test is carried out by using a stainless steel sulfuric acid-copper sulfate corrosion test method (GB/T4334.5-2000) which is well known in the field, and the results are as follows: after bending, the outer surface of the bent sample is observed under a magnifying glass of 10 times, no crack (0/10) caused by intergranular corrosion is seen, and the corrosion resistance is qualified.
The chemical compositions of deposited metals obtained by welding the welding wires of the above embodiments are measured, and the chemical composition is basically consistent with that of the welding wires of the corresponding embodiments.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. The austenitic stainless steel welding wire for stainless steel welding is characterized by comprising the following chemical components in percentage by weight: 0.015-0.10% of C, 0.30-1.1% of Si, 1.2-2.3% of Mn, less than or equal to 0.03% of P, less than or equal to 0.015% of S, 9.5-13.5% of Ni, 18.2-27.0% of Cr, 0.04-0.08% of N, 0.05-0.25% of V, 0.1-0.3% of W and the balance of Fe.
2. The austenitic stainless steel welding wire for stainless steel welding according to claim 1, which is a solid wire.
3. The austenitic stainless steel welding wire for stainless steel welding according to claim 1, wherein Φ is 1.0 to 2.0 mm.
4. The austenitic stainless steel welding wire for stainless steel welding according to claim 1, wherein Φ is 1.0 to 1.5 mm.
5. The austenitic stainless steel welding wire for stainless steel welding according to claim 1, wherein Φ is 1.2 mm.
6. The austenitic stainless steel welding wire for stainless steel welding according to claim 1, wherein the deposited metal chemical composition obtained by welding is: 0.015-0.10% of C, 0.30-1.1% of Si, 1.2-2.3% of Mn, less than or equal to 0.03% of P, less than or equal to 0.015% of S, 9.5-13.5% of Ni, 18.2-27.0% of Cr, 0.04-0.08% of N, 0.05-0.25% of V, 0.1-0.3% of W and the balance of Fe.
7. The austenitic stainless steel welding wire for stainless steel welding according to claim 1, wherein the welding wire comprises the following chemical components in percentage by weight:
(1) 0.032% of C, 0.36% of Si, 1.41% of Mn, 0.022% of P, 0.011% of S, 10.5% of Ni, 19.2% of Cr, 0.042% of N, 0.15% of V, 0.11% of W and the balance of Fe; or the one or more of the following components,
(2) 0.054% of C, 0.62% of Si, 1.75% of Mn, 0.020% of P, 0.012% of S, 12.6% of Ni, 23.5% of Cr, 0.075% of N, 0.07% of V, 0.21% of W and the balance of Fe; or the one or more of the following components,
(3) 0.06% of C, 0.46% of Si, 1.66% of Mn, 0.024% of P, 0.008% of S, 9.70% of Ni, 18.70% of Cr, 0.044% of N, 0.24% of V, 0.23% of W and the balance of Fe; or the one or more of the following components,
(4) 0.098% of C, 0.31% of Si, 2.27% of Mn, 0.018% of P, 0.006% of S, 9.58% of Ni, 26.52% of Cr, 0.042% of N, 0.25% of V, 0.11% of W and the balance of Fe; or the one or more of the following components,
(5) 0.017% of C, 1.08% of Si, 1.24% of Mn, 0.020% of P, 0.009% of S, 13.42% of Ni, 18.27% of Cr, 0.076% of N, 0.054% of V, 0.29% of W and the balance of Fe; or the one or more of the following components,
(6) 0.068% of C, 0.73% of Si, 1.82% of Mn, 0.019% of P, 0.007% of S, 11.03% of Ni, 22.73% of Cr, 0.063% of N, 0.142% of V, 0.22% of W and the balance of Fe.
8. The austenitic stainless steel welding wire for stainless steel welding according to claim 1, wherein it is prepared by the method described in the specification.
9. A method for preparing an austenitic stainless steel welding wire for stainless steel welding, characterized in that the method is as described in the description; the welding wire comprises the following chemical components in percentage by weight: 0.015-0.10% of C, 0.30-1.1% of Si, 1.2-2.3% of Mn, less than or equal to 0.03% of P, less than or equal to 0.015% of S, 9.5-13.5% of Ni, 18.2-27.0% of Cr, 0.04-0.08% of N, 0.05-0.25% of V, 0.1-0.3% of W and the balance of Fe.
10. The method of claim 9, wherein the deposited metal chemistry resulting from welding the wire is selected from the group consisting of: 0.015-0.10% of C, 0.30-1.1% of Si, 1.2-2.3% of Mn, less than or equal to 0.03% of P, less than or equal to 0.015% of S, 9.5-13.5% of Ni, 18.2-27.0% of Cr, 0.04-0.08% of N, 0.05-0.25% of V, 0.1-0.3% of W and the balance of Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911296938.1A CN110919235B (en) | 2019-12-17 | 2019-12-17 | Welding wire for stainless steel welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911296938.1A CN110919235B (en) | 2019-12-17 | 2019-12-17 | Welding wire for stainless steel welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110919235A true CN110919235A (en) | 2020-03-27 |
| CN110919235B CN110919235B (en) | 2021-06-18 |
Family
ID=69863922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911296938.1A Active CN110919235B (en) | 2019-12-17 | 2019-12-17 | Welding wire for stainless steel welding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110919235B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220281038A1 (en) * | 2019-11-26 | 2022-09-08 | Esab Seah Corp. | Stainless steel welding wire for use in lng tank manufacturing |
| CN116586817A (en) * | 2023-05-22 | 2023-08-15 | 北京金威焊材有限公司 | High heat-resistant corrosion-resistant stainless steel solid welding wire and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6228097A (en) * | 1985-07-30 | 1987-02-06 | Kawasaki Steel Corp | Wire for mig arc welding of austenitic stainless steel |
| JPH07314178A (en) * | 1994-05-27 | 1995-12-05 | Nippon Steel Corp | Gas shielded welding wire for austenitic stainless steel |
| CN1876857A (en) * | 2005-06-11 | 2006-12-13 | 太原钢铁(集团)有限公司 | Method for smelting stainless steel using molten iron as raw material |
| CN101125397A (en) * | 2007-06-05 | 2008-02-20 | 钢铁研究总院 | Nickel-saving type austenitic stainless steel welding wire |
| CN101954547A (en) * | 2010-04-20 | 2011-01-26 | 无锡南理工科技发展有限公司 | High-silicon extra-low-carbon stainless steel soldering wire and horizontal continuous-casting tandem-rolling continuous-drawing manufacturing method thereof |
| CN104175019A (en) * | 2014-08-22 | 2014-12-03 | 首钢总公司 | Gas shield solid welding wire for circumferential weld of X90 pipeline steel |
-
2019
- 2019-12-17 CN CN201911296938.1A patent/CN110919235B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6228097A (en) * | 1985-07-30 | 1987-02-06 | Kawasaki Steel Corp | Wire for mig arc welding of austenitic stainless steel |
| JPH07314178A (en) * | 1994-05-27 | 1995-12-05 | Nippon Steel Corp | Gas shielded welding wire for austenitic stainless steel |
| CN1876857A (en) * | 2005-06-11 | 2006-12-13 | 太原钢铁(集团)有限公司 | Method for smelting stainless steel using molten iron as raw material |
| CN101125397A (en) * | 2007-06-05 | 2008-02-20 | 钢铁研究总院 | Nickel-saving type austenitic stainless steel welding wire |
| CN101954547A (en) * | 2010-04-20 | 2011-01-26 | 无锡南理工科技发展有限公司 | High-silicon extra-low-carbon stainless steel soldering wire and horizontal continuous-casting tandem-rolling continuous-drawing manufacturing method thereof |
| CN104175019A (en) * | 2014-08-22 | 2014-12-03 | 首钢总公司 | Gas shield solid welding wire for circumferential weld of X90 pipeline steel |
Non-Patent Citations (1)
| Title |
|---|
| 宋仁伯: "《材料成形工艺学》", 28 February 2019, 冶金工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220281038A1 (en) * | 2019-11-26 | 2022-09-08 | Esab Seah Corp. | Stainless steel welding wire for use in lng tank manufacturing |
| CN116586817A (en) * | 2023-05-22 | 2023-08-15 | 北京金威焊材有限公司 | High heat-resistant corrosion-resistant stainless steel solid welding wire and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110919235B (en) | 2021-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Sedriks | Corrosion of stainless steels | |
| EP0864663B1 (en) | High-strength welded steel structures having excellent corrosion resistance | |
| US20150203944A1 (en) | Austenitic steel alloy having excellent creep strength and resistance to oxidation and corrosion at elevated use temeratures | |
| Voronenko | Austenitic-ferritic stainless steels: A state-of-the-art review | |
| CN106661683A (en) | Martensitic-ferritic stainless steel, manufactured product and processes using the same | |
| WO1996001334A1 (en) | Process for producing ferritic iron-base alloy and ferritic heat-resistant steel | |
| JP2000054026A (en) | Method for producing pressure vessel used in the presence of hydrogen sulfide, and steel therefor | |
| JPH0885849A (en) | High chromium ferritic heat resistant steel | |
| CN110919235B (en) | Welding wire for stainless steel welding | |
| US4678523A (en) | Corrosion- and wear-resistant duplex steel | |
| KR20140117417A (en) | Austenitic alloy | |
| EP3061841B1 (en) | Corrosion pitting resistant martensitic stainless steel | |
| JP4457492B2 (en) | Stainless steel with excellent workability and weldability | |
| JP4465066B2 (en) | Welding materials for ferrite and austenitic duplex stainless steels | |
| JP7492106B2 (en) | Welding material for ferritic heat-resistant steel and manufacturing method for welded joint of ferritic heat-resistant steel | |
| US3573034A (en) | Stress-corrosion resistant stainless steel | |
| Eun et al. | Types and requirements of materials and corrosion | |
| JPH0885850A (en) | High chromium ferritic heat resistant steel | |
| JPS6376854A (en) | Heat resistant ferritic steel having superior strength at high temperature | |
| US2125929A (en) | Alloy and manufactures | |
| JPH0885848A (en) | High chromium ferritic heat resistant steel | |
| JPS5943993B2 (en) | Manufacturing method of stainless steel materials for combustion appliances | |
| US20210348255A1 (en) | Steel for making acid-gas resistant part | |
| JPH0397832A (en) | High-strength high chromium steel excellent in oxidation resistance and weldability | |
| JPH02280993A (en) | Welding material for high-cr ferrite steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |