CN109530964B - A high-efficiency submerged arc welding metal powder-cored flux-cored wire suitable for ultra-low temperature and high manganese steel - Google Patents
A high-efficiency submerged arc welding metal powder-cored flux-cored wire suitable for ultra-low temperature and high manganese steel Download PDFInfo
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 62
- 239000002184 metal Substances 0.000 title claims abstract description 62
- 238000003466 welding Methods 0.000 title claims abstract description 52
- 229910000617 Mangalloy Inorganic materials 0.000 title claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000011572 manganese Substances 0.000 claims abstract description 20
- 239000000126 substance Substances 0.000 claims abstract description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- 229910000604 Ferrochrome Inorganic materials 0.000 claims abstract description 11
- 239000012535 impurity Substances 0.000 claims abstract description 11
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910000676 Si alloy Inorganic materials 0.000 claims abstract description 10
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 claims abstract description 10
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 230000004907 flux Effects 0.000 claims description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims 2
- 229910052748 manganese Inorganic materials 0.000 abstract description 17
- 239000000203 mixture Substances 0.000 abstract description 15
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052717 sulfur Inorganic materials 0.000 abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 10
- 238000003860 storage Methods 0.000 abstract description 9
- 229910052710 silicon Inorganic materials 0.000 abstract description 8
- 239000003949 liquefied natural gas Substances 0.000 description 11
- 229910001566 austenite Inorganic materials 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 238000007711 solidification Methods 0.000 description 9
- 230000008023 solidification Effects 0.000 description 9
- 239000003915 liquefied petroleum gas Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- 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
- B23K35/3073—Fe as the principal constituent with Mn as next major constituent
-
- 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
- B23K35/40—Making wire or rods for soldering or welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
- Arc Welding In General (AREA)
Abstract
本发明公开了一种用于超低温高锰钢的高效埋弧焊金属粉芯药芯焊丝，该高效埋弧焊金属粉芯药芯焊丝由钢带和金属粉药芯组成，其钢带的化学组分是：C为0.20~0.23wt%，Si为0.03~0.05wt%，Mn为6~8wt%，P≤0.002wt%，S≤0.001wt%，余量为Fe和不可避免的杂质；其金属粉芯的化学组分是：电解锰为18~20wt%，锰硅合金为3~4wt%，镍粉为8~10wt%，低碳铬铁为6~8wt%，钨粉为4~6wt%，钾长石为2.0~3.0%wt%，余量为铁粉，组分总含量为100%，本发明能满足对所焊接的LNG贮罐的强度和超低温韧性的技术要求。The invention discloses a high-efficiency submerged arc welding metal powder-cored flux-cored wire for ultra-low temperature and high manganese steel. The components are: C is 0.20~0.23wt%, Si is 0.03~0.05wt%, Mn is 6~8wt%, P≤0.002wt%, S≤0.001wt%, and the balance is Fe and inevitable impurities; The chemical composition of the metal powder core is: electrolytic manganese is 18~20wt%, manganese silicon alloy is 3~4wt%, nickel powder is 8~10wt%, low carbon ferrochrome is 6~8wt%, and tungsten powder is 4~6wt% %, potassium feldspar is 2.0-3.0% wt%, the balance is iron powder, and the total component content is 100%. The invention can meet the technical requirements for the strength and ultra-low temperature toughness of the welded LNG storage tank.
Description
技术领域technical field
本发明涉及一种适用于超低温高锰钢的高效埋弧焊金属粉芯药芯焊丝。The invention relates to a high-efficiency submerged arc welding metal powder-cored flux-cored welding wire suitable for ultra-low temperature and high manganese steel.
背景技术Background technique
随着我国实施海洋战略和新能源战略，开发和应用液化石油气（LPG）和液化天然气（LNG），液化石油气（LPG）和液化天然气（LNG）贮存和运输容器用钢的需求量将会越来越大。目前用于LNG贮罐的低温钢的工作温度为-196℃，商业用为9Ni钢，钢板价格昂贵。为节省Ni资源、降低钢铁材料的成本以及能源贮存和运输成本，采用低廉的其它元素来制备超低温用钢已成为趋势。因锰元素具有与镍元素相同的冶金物理性能，且价格低廉，超低温高锰钢已成为替代9Ni钢的首选材料，具有较大的市场前景。With the implementation of marine strategy and new energy strategy in my country, the development and application of liquefied petroleum gas (LPG) and liquefied natural gas (LNG), the demand for steel for liquefied petroleum gas (LPG) and liquefied natural gas (LNG) storage and transportation containers will be getting bigger. At present, the working temperature of the low-temperature steel used for LNG storage tanks is -196 °C, and the commercial use is 9Ni steel, and the steel plate is expensive. In order to save Ni resources, reduce the cost of steel materials and energy storage and transportation costs, it has become a trend to use other low-cost elements to prepare ultra-low temperature steel. Because manganese element has the same metallurgical physical properties as nickel element, and the price is low, ultra-low temperature high manganese steel has become the preferred material to replace 9Ni steel, and has a great market prospect.
超低温高锰钢在制造LNG等贮存运输容器时，焊接工艺仍是主要的连接方法，其中，埋弧焊方法是常用的焊接方法，需要相配套的焊丝。埋弧焊分为两种：实芯焊丝和金属粉芯药芯焊丝，金属粉芯药芯焊丝具有比实芯焊丝更高的焊接效率。目前，市场未见到适用于超低温高锰钢的埋弧焊用金属粉芯药芯焊丝，这将是实现高效率焊接超低温高锰钢的瓶颈之一。When ultra-low temperature and high manganese steel is used to manufacture storage and transportation containers such as LNG, the welding process is still the main connection method. Among them, the submerged arc welding method is a commonly used welding method, and a matching welding wire is required. There are two types of submerged arc welding: solid wire and metal powder cored wire. Metal powder cored wire has higher welding efficiency than solid wire. At present, there is no metal powder-cored flux-cored wire for submerged arc welding suitable for ultra-low temperature and high manganese steel in the market, which will be one of the bottlenecks in realizing high-efficiency welding of ultra-low temperature and high manganese steel.
发明内容SUMMARY OF THE INVENTION
本发明所要解决的技术问题是，针对以上现有技术存在的缺点，提供一种适用于超低温高锰钢的高效埋弧焊金属粉芯药芯焊丝，该高效埋弧焊实芯焊丝形成的焊缝金属低温韧性优良，强度与超低温高锰钢相匹配，能满足对所焊接的LNG贮罐的强度和超低温韧性的技术要求。The technical problem to be solved by the present invention is to provide a high-efficiency submerged arc welding metal powder-cored flux-cored welding wire suitable for ultra-low temperature and high manganese steel in view of the above shortcomings of the prior art. The seam metal has excellent low temperature toughness, and its strength matches that of ultra-low temperature high manganese steel, which can meet the technical requirements for the strength and ultra-low temperature toughness of the welded LNG storage tank.
本发明解决以上技术问题的技术方案是：一种用于超低温高锰钢的高效埋弧焊金属粉芯药芯焊丝，该高效埋弧焊金属粉芯药芯焊丝由钢带和金属粉芯组成，其钢带的化学组分是：C为0.20~0.23wt%，Si为0.03~0.05wt%，Mn为6~8wt%，P≤0.002wt%，S≤0.001wt%，余量为Fe和不可避免的杂质；The technical solution of the present invention to solve the above technical problems is: a high-efficiency submerged arc welding metal powder-cored flux-cored welding wire for ultra-low temperature high-manganese steel, the high-efficiency submerged arc welding metal powder-cored flux-cored welding wire is composed of a steel strip and a metal powder core , the chemical composition of the steel strip is: C is 0.20~0.23wt%, Si is 0.03~0.05wt%, Mn is 6~8wt%, P≤0.002wt%, S≤0.001wt%, the balance is Fe and unavoidable impurities;
其金属粉芯的化学组分是：电解锰为18~20wt%，锰硅合金为3~4wt%，镍粉为8~10wt%，低碳铬铁为6~8wt%，钨粉为4~6wt%，钾长石为2.0~3.0%wt%，余量为铁粉，组分总含量为100%。The chemical composition of the metal powder core is: electrolytic manganese is 18~20wt%, manganese silicon alloy is 3~4wt%, nickel powder is 8~10wt%, low carbon ferrochromium is 6~8wt%, and tungsten powder is 4~8wt%. 6wt%, potassium feldspar is 2.0~3.0%wt%, the balance is iron powder, and the total content of components is 100%.
本发明还提供一种用于超低温高锰钢的高效埋弧焊金属粉芯药芯焊丝制备方法，具体包括以下步骤：The invention also provides a method for preparing a high-efficiency submerged arc welding metal powder-cored flux-cored welding wire for ultra-low temperature and high manganese steel, which specifically includes the following steps:
S1：按照上述金属粉药芯各组分按其百分比量进行混合；S1: According to the above-mentioned metal powder core, each component is mixed according to its percentage;
S2：将钢带滚卷成U型断面，把S1混合的金属粉药芯填充入U型金属槽中，钢带再次滚卷以对接0型封口方式进行密封，填充原料紧紧的滚压在管型焊丝内；S2: Roll the steel strip into a U-shaped section, fill the metal powder cores mixed with S1 into the U-shaped metal groove, and roll the steel strip again to seal the 0-shaped sealing method, and the filling material is tightly rolled in the In tubular welding wire;
S3：卷成管型的焊丝再经过拉拔形成金属粉芯药芯焊丝。S3: The wire rolled into a tube shape is then drawn to form a metal powder-cored flux-cored wire.
本发明金属粉芯药芯焊丝均通过全自动埋弧焊焊接方法用于超低温高锰钢焊接，全自动埋弧焊焊接时采用匹配焊剂型号为INCOFLUX9，其焊接工艺参数如下：焊前不预热，层间温度≤150℃，焊接电流为440~450A，电弧电压为28~30V，焊接速度为35~36cm/min，焊接热输入为20~22kJ/cm；The metal powder-cored flux-cored welding wire of the present invention is used for the welding of ultra-low temperature high manganese steel by the fully automatic submerged arc welding method, and the matching flux type is INCOFLUX9 during the automatic submerged arc welding welding. The welding process parameters are as follows: no preheating before welding , the temperature between layers is ≤150℃, the welding current is 440~450A, the arc voltage is 28~30V, the welding speed is 35~36cm/min, and the welding heat input is 20~22kJ/cm;
本发明焊接的超低温钢的力学性能是：抗拉强度为≥400MPa，屈服强度为≥560MPa，延伸率A=40%；-20196℃时冲击功Akv≥54J。The mechanical properties of the ultra-low temperature steel welded by the invention are: the tensile strength is ≥400MPa, the yield strength is ≥560MPa, the elongation A=40%; the impact energy Akv at -20196°C is ≥54J.
本发明进一步限定方案：The present invention further limits the scheme:
前述的其钢带的化学组分是：C为0.22wt%，Si为0.04wt%，Mn为7.2wt%，P为0.002wt%，S为0.001wt%，余量为Fe和不可避免的杂质；The chemical composition of the aforementioned steel strip is: C is 0.22wt%, Si is 0.04wt%, Mn is 7.2wt%, P is 0.002wt%, S is 0.001wt%, and the balance is Fe and inevitable impurities ;
其金属粉芯的化学组分是：电解锰为19wt%，锰硅合金为3.4wt%，镍粉为9.2wt%，低碳铬铁为6.4wt%，钨粉为5.3wt%，钾长石为2.1wt%，余量为铁粉，组分总含量为100%。The chemical composition of the metal powder core is: electrolytic manganese is 19wt%, manganese silicon alloy is 3.4wt%, nickel powder is 9.2wt%, low carbon ferrochrome is 6.4wt%, tungsten powder is 5.3wt%, potassium feldspar is 5.3wt% It is 2.1wt%, the balance is iron powder, and the total content of the components is 100%.
前述的其钢带的化学组分是：C为0.24wt%，Si为0.025wt%，Mn为5.6wt%，P为0.0015wt%，S为0.001wt%，余量为Fe和不可避免的杂质；The chemical composition of the aforementioned steel strip is: C is 0.24wt%, Si is 0.025wt%, Mn is 5.6wt%, P is 0.0015wt%, S is 0.001wt%, and the balance is Fe and inevitable impurities ;
其金属粉芯的化学组分是：电解锰为23wt%，锰硅合金为2.5wt%，镍粉为7.2wt%，低碳铬铁为5.4wt%，钨粉为3.6wt%，钾长石为1.5wt%，余量为铁粉，组分总含量为100%。The chemical composition of the metal powder core is: electrolytic manganese is 23wt%, manganese-silicon alloy is 2.5wt%, nickel powder is 7.2wt%, low carbon ferrochrome is 5.4wt%, tungsten powder is 3.6wt%, potassium feldspar is 3.6wt%. It is 1.5wt%, the balance is iron powder, and the total content of the components is 100%.
前述的其钢带的化学组分是：C为0.28wt%，Si为0.014wt%，Mn为4.7wt%，P为0.0016wt%，S为0.001wt%，余量为Fe和不可避免的杂质；The chemical composition of the aforementioned steel strip is: C is 0.28wt%, Si is 0.014wt%, Mn is 4.7wt%, P is 0.0016wt%, S is 0.001wt%, and the balance is Fe and inevitable impurities ;
其金属粉芯的化学组分是：电解锰为26wt%，锰硅合金为1.7wt%，镍粉为5.8wt%，低碳铬铁为4.5wt%，钨粉为2.4wt%，钾长石为0.8wt%，余量为铁粉，组分总含量为100%。The chemical composition of the metal powder core is: electrolytic manganese is 26wt%, manganese-silicon alloy is 1.7wt%, nickel powder is 5.8wt%, low carbon ferrochromium is 4.5wt%, tungsten powder is 2.4wt%, potassium feldspar is 2.4wt% It is 0.8wt%, the balance is iron powder, and the total content of the components is 100%.
本发明的有益效果是：The beneficial effects of the present invention are:
本发明采用的钢带与金属粉共同合金过渡，形成的焊缝金属中Mn含量为20~28wt%，与母材的锰含量相当，保证了与母材基本相同的成分体系，在形成焊接接头时，避免了锰元素扩散所形成的熔合线附近微观组织与力学性能的变化；The steel strip and metal powder used in the present invention are co-alloyed and transitioned, and the Mn content in the formed weld metal is 20-28wt%, which is equivalent to the manganese content of the base metal, which ensures that the composition system is basically the same as that of the base metal. When , the change of microstructure and mechanical properties near the fusion line formed by the diffusion of manganese element is avoided;
本发明中的锰元素与碳元素、镍元素同为奥氏体形成元素，共同作用在焊缝金属熔池凝固时，以奥氏体相为凝固初始相，一直保持到室温，形成奥氏体组织的焊缝金属，故本发明中钢带中的碳含量为0.20~0.23wt%，低碳铬铁为3~8wt%，镍粉为4~10wt%；In the present invention, manganese element, carbon element and nickel element are both austenite forming elements, and when the weld metal molten pool is solidified, the austenite phase is used as the initial solidification phase, and the austenite phase is maintained until room temperature to form austenite. Therefore, in the present invention, the carbon content in the steel strip is 0.20-0.23wt%, the low-carbon ferrochromium is 3-8wt%, and the nickel powder is 4-10wt%;
本发明在以奥氏体相为主的焊缝金属凝固时，为降低凝固裂纹倾向，添加2~6wt%的钨粉，以减小凝固温度区间，从而有效减少和避免了凝固裂纹的出现，此外，杂质元素硫与磷的存在，使焊缝金属产生液化裂纹与再热裂纹，故本发明严格控制硫、磷元素的含量：P≤0.002wt%，S≤0.001wt%；In the present invention, in order to reduce the tendency of solidification cracks when the weld metal mainly composed of austenite phase is solidified, 2-6wt% tungsten powder is added to reduce the solidification temperature range, thereby effectively reducing and avoiding the occurrence of solidification cracks. In addition, the existence of impurity elements sulfur and phosphorus causes liquefaction cracks and reheat cracks in the weld metal, so the present invention strictly controls the content of sulfur and phosphorus elements: P≤0.002wt%, S≤0.001wt%;
本发明采用的化学成分体系，使焊缝金属组织为全奥氏体，不仅保证了焊缝金属有优良的超低温韧性和足够的强度；且降低了凝固温度范围，避免凝固裂纹的出现，同时减少或防止液化裂纹及再热裂纹的产生；The chemical composition system adopted in the present invention makes the weld metal structure to be full austenite, which not only ensures that the weld metal has excellent ultra-low temperature toughness and sufficient strength, but also reduces the solidification temperature range, avoids the appearance of solidification cracks, and reduces the Or prevent the occurrence of liquefaction cracks and reheat cracks;
本发明所制备的高效埋弧焊金属粉芯药芯焊丝用于制备LNG贮罐的超低温高锰钢的焊接，焊缝金属形成全奥氏体组织，保证了焊缝金属优良的超低温韧性，-196℃时冲击功Akv为72~98J；亦保证了焊缝金属的机械性能：屈服强度为420~450MPa，抗拉强度为610~690MPa，延伸率A为31~38%，满足了用超低温高锰钢制造的LNG贮罐的力学性能要求和超低温韧性的要求，The high-efficiency submerged arc welding metal powder-cored flux-cored wire prepared by the invention is used for the welding of ultra-low temperature and high manganese steel for preparing LNG storage tanks, and the weld metal forms a full austenite structure, which ensures the excellent ultra-low temperature toughness of the weld metal,- The impact energy Akv at 196°C is 72~98J; it also ensures the mechanical properties of the weld metal: the yield strength is 420~450MPa, the tensile strength is 610~690MPa, and the elongation A is 31~38%, which meets the requirements of ultra-low temperature and high temperature. Mechanical performance requirements and ultra-low temperature toughness requirements of LNG storage tanks made of manganese steel,
因此，本发明采用的合金元素价格低、合金成分体系简单，焊接效率高；制备的所述全自动埋弧焊实芯焊丝形成的焊缝金属低温韧性优良，强度与超低温高锰钢相匹配，满足了对所焊接的LNG贮罐的强度和超低温韧性的技术要求。Therefore, the alloying element adopted in the present invention has low price, simple alloy composition system, and high welding efficiency; the prepared fully automatic submerged arc welding solid welding wire forms the weld metal with excellent low temperature toughness, and the strength matches that of ultra-low temperature high manganese steel. It meets the technical requirements for the strength and ultra-low temperature toughness of the welded LNG storage tank.
具体实施方式Detailed ways
实施例1Example 1
本实施例提供一种适用于超低温高锰钢的高效埋弧焊金属粉芯药芯焊丝，该高效埋弧焊金属粉芯药芯焊丝由钢带和金属粉芯组成，其钢带的化学组分是：C为0.22wt%，Si为0.04wt%，Mn为7.2wt%，P为0.002wt%，S为0.001wt%，余量为Fe和不可避免的杂质；This embodiment provides a high-efficiency submerged arc welding metal powder-cored flux-cored wire suitable for ultra-low temperature and high-manganese steel. The high-efficiency submerged arc welding metal powder-cored flux-cored welding wire is composed of a steel strip and a metal powder core. The points are: C is 0.22wt%, Si is 0.04wt%, Mn is 7.2wt%, P is 0.002wt%, S is 0.001wt%, and the balance is Fe and inevitable impurities;
其金属粉芯的化学组分是：电解锰为19wt%，锰硅合金为3.4wt%，镍粉为9.2wt%，低碳铬铁为6.4wt%，钨粉为5.3wt%，钾长石为2.1wt%，余量为铁粉，组分总含量为100%。The chemical composition of the metal powder core is: electrolytic manganese is 19wt%, manganese silicon alloy is 3.4wt%, nickel powder is 9.2wt%, low carbon ferrochrome is 6.4wt%, tungsten powder is 5.3wt%, potassium feldspar is 5.3wt% It is 2.1wt%, the balance is iron powder, and the total content of the components is 100%.
本实施例焊后的焊缝金属显微组织及力学性能进行检测分析：焊缝金属为全奥氏体组织；没有凝固裂纹及再热裂纹产生；焊缝金属的屈服强度为427MPa，抗拉强度为623MPa，伸长率A=36%，-196℃时冲击功平均值Akv=96J。In this example, the microstructure and mechanical properties of the weld metal after welding are detected and analyzed: the weld metal is a full austenite structure; no solidification cracks and reheat cracks are generated; the yield strength of the weld metal is 427MPa, and the tensile strength It is 623MPa, the elongation A=36%, and the average value of impact energy Akv=96J at -196℃.
实施例2Example 2
本实施例提供一种适用于超低温高锰钢的高效埋弧焊金属粉芯药芯焊丝，该高效埋弧焊金属粉芯药芯焊丝由钢带和金属粉芯组成，其钢带的化学组分是：C为0.24wt%，Si为0.025wt%，Mn为5.6wt%，P为0.0015wt%，S为0.001wt%，余量为Fe和不可避免的杂质；This embodiment provides a high-efficiency submerged arc welding metal powder-cored flux-cored wire suitable for ultra-low temperature and high-manganese steel. The high-efficiency submerged arc welding metal powder-cored flux-cored welding wire is composed of a steel strip and a metal powder core. The points are: C is 0.24wt%, Si is 0.025wt%, Mn is 5.6wt%, P is 0.0015wt%, S is 0.001wt%, and the balance is Fe and inevitable impurities;
其金属粉芯的化学组分是：电解锰为23wt%，锰硅合金为2.5wt%，镍粉为7.2wt%，低碳铬铁为5.4wt%，钨粉为3.6wt%，钾长石为1.5wt%，余量为铁粉，组分总含量为100%。The chemical composition of the metal powder core is: electrolytic manganese is 23wt%, manganese-silicon alloy is 2.5wt%, nickel powder is 7.2wt%, low carbon ferrochrome is 5.4wt%, tungsten powder is 3.6wt%, potassium feldspar is 3.6wt%. It is 1.5wt%, the balance is iron powder, and the total content of the components is 100%.
对本实施例焊后的焊缝金属显微组织及力学性能进行检测分析：焊缝金属为全奥氏体组织；没有凝固裂纹及再热裂纹产生；焊缝金属的屈服强度为446MPa，抗拉强度为683MPa，伸长率A=32%，-196℃时冲击功平均值Akv=72J。The microstructure and mechanical properties of the weld metal after welding in this example are detected and analyzed: the weld metal is a fully austenitic structure; no solidification cracks and reheat cracks are generated; the yield strength of the weld metal is 446MPa, and the tensile strength is 446MPa. It is 683MPa, the elongation A=32%, the average value of impact energy Akv=72J at -196℃.
实施例3Example 3
本实施例提供一种适用于超低温高锰钢的高效埋弧焊金属粉芯药芯焊丝，该高效埋弧焊金属粉芯药芯焊丝由钢带和金属粉芯组成，其钢带的化学组分是：C为0.28wt%，Si为0.014wt%，Mn为4.7wt%，P为0.0016wt%，S为0.001wt%，余量为Fe和不可避免的杂质；This embodiment provides a high-efficiency submerged arc welding metal powder-cored flux-cored wire suitable for ultra-low temperature and high-manganese steel. The high-efficiency submerged arc welding metal powder-cored flux-cored welding wire is composed of a steel strip and a metal powder core. The points are: C is 0.28wt%, Si is 0.014wt%, Mn is 4.7wt%, P is 0.0016wt%, S is 0.001wt%, and the balance is Fe and inevitable impurities;
其金属粉芯的化学组分是：电解锰为26wt%，锰硅合金为1.7wt%，镍粉为5.8wt%，低碳铬铁为4.5wt%，钨粉为2.4wt%，钾长石为0.8wt%，余量为铁粉，组分总含量为100%。The chemical composition of the metal powder core is: electrolytic manganese is 26wt%, manganese-silicon alloy is 1.7wt%, nickel powder is 5.8wt%, low carbon ferrochromium is 4.5wt%, tungsten powder is 2.4wt%, potassium feldspar is 2.4wt% It is 0.8wt%, the balance is iron powder, and the total content of the components is 100%.
对本实施例焊后的焊缝金属显微组织及力学性能进行检测分析：焊缝金属为全奥氏体组织；没有凝固裂纹及再热裂纹产生；焊缝金属的屈服强度为438MPa，抗拉强度为643MPa，伸长率A=34%，-196℃时冲击功平均值Akv=83J。The microstructure and mechanical properties of the weld metal after welding in this example are detected and analyzed: the weld metal is a full austenite structure; no solidification cracks and reheat cracks are generated; the yield strength of the weld metal is 438MPa, and the tensile strength is 438MPa. It is 643MPa, the elongation A=34%, and the average value of impact energy Akv=83J at -196℃.
实验结果表明：本实施例1-3经全自动埋弧焊焊接后，其焊缝金属的力学性能完全满足超低温高锰钢的技术要求，其焊接接头满足LNG贮罐的技术要求。The experimental results show that after fully automatic submerged arc welding in Examples 1-3, the mechanical properties of the weld metal completely meet the technical requirements of ultra-low temperature and high manganese steel, and the welded joints meet the technical requirements of LNG storage tanks.
除上述实施例外，本发明还可以有其他实施方式。凡采用等同替换或等效变换形成的技术方案，均落在本发明要求的保护范围。In addition to the above-described embodiments, the present invention may also have other embodiments. All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.
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| CN110653515B (en) * | 2019-10-31 | 2021-10-01 | 中国船舶重工集团公司第七二五研究所 | Seamless submerged arc flux-cored wire for welding high manganese steel LNG storage tank |
| CN111790999A (en) * | 2020-06-28 | 2020-10-20 | 昆山京群焊材科技有限公司 | Flux combination of metal powder core submerged arc welding wire for 25Mn austenitic steel |
| CN112894198A (en) * | 2021-01-20 | 2021-06-04 | 浙江鸿途焊接科技有限公司 | Self-protection flux-cored wire for ultralow-temperature high-manganese steel |
| CN112894199A (en) * | 2021-01-20 | 2021-06-04 | 浙江鸿途焊接科技有限公司 | Consumable electrode gas shielded welding flux-cored wire for ultralow-temperature high manganese steel |
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| CN102489895B (en) * | 2011-12-09 | 2014-01-15 | 四川大西洋焊接材料股份有限公司 | Gas protective flux cored wire for welding vanadium-containing heat resistant steel |
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