WO2021078136A1 - 一种气体保护焊丝用盘条及焊丝 - Google Patents

一种气体保护焊丝用盘条及焊丝 Download PDF

Info

Publication number
WO2021078136A1
WO2021078136A1 PCT/CN2020/122395 CN2020122395W WO2021078136A1 WO 2021078136 A1 WO2021078136 A1 WO 2021078136A1 CN 2020122395 W CN2020122395 W CN 2020122395W WO 2021078136 A1 WO2021078136 A1 WO 2021078136A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding wire
gas shielded
wire
wire rod
shielded welding
Prior art date
Application number
PCT/CN2020/122395
Other languages
English (en)
French (fr)
Inventor
屈朝霞
夏立乾
王宝森
Original Assignee
宝山钢铁股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 宝山钢铁股份有限公司 filed Critical 宝山钢铁股份有限公司
Priority to US17/766,396 priority Critical patent/US20240058900A1/en
Priority to EP20879814.0A priority patent/EP4026652A4/en
Publication of WO2021078136A1 publication Critical patent/WO2021078136A1/zh

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
    • B23K35/02—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
    • 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
    • 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
    • B23K35/3066—Fe as the principal constituent with Ni 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
    • B23K35/22—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
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area
    • B23K35/383—Selection of media, e.g. special atmospheres for surrounding the working area mainly containing noble gases or nitrogen
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium

Definitions

  • the invention relates to a wire rod and welding wire for welding wire, in particular to a wire rod and welding wire for gas shielded welding wire.
  • the earliest ordinary commercial weathering steels can be divided into CorTen A series of high-phosphorus copper plus chromium and nickel, and CorTen B series mainly based on chromium-manganese alloying.
  • the first generation of weathering steel used in railway vehicles was mainly CorTen A.
  • the second-generation weathering steel for railway vehicles is mainly high-strength weathering steel of the Cu-Cr-Ni alloy system without P, and the weathering performance of the two is equivalent.
  • these two kinds of weather-resistant steels still cannot meet the long-life requirements of railway vehicles.
  • the publication number is CN102756219A
  • the publication date is October 31, 2012
  • the Chinese patent document titled "a kind of welding wire, wire rod and its application” discloses a wire rod and welding wire .
  • the technical solution disclosed in the patent document it is used to solve the problem of S450EW steel with gas shielded welding wire, so the tensile strength of the welding wire deposited metal is not less than 650MPa.
  • the existing welding wire is not suitable for S350EW steel. Based on this, it is desired to obtain a welding material whose comprehensive mechanical properties and corrosion resistance of the deposited metal are equivalent to those of the base material S350EW, and can guarantee weather resistance.
  • the performance is equivalent to the base material S350EW, its mechanical properties are also equivalent to the base material (that is, the mechanical properties are at the ordinary 50 kg level).
  • the welding material has good welding processability and wide enough welding process to adapt to the window.
  • One of the objectives of the present invention is to provide a wire rod for gas shielded welding wire with high weather resistance and low strength.
  • the welding wire made from the wire rod for gas shielded welding wire has the same comprehensive mechanical properties and corrosion resistance as the welding wire deposited metal during welding.
  • As the welding base material, S350EW is equivalent, and the process performance of the welding wire is relatively broad, which can take into account the specifications of hot-rolled plates and cold-rolled plates.
  • the present invention proposes a high-weather-resistant low-strength gas shielded welding wire rod, the mass percentage of chemical elements is:
  • the balance is Fe and other unavoidable impurities.
  • the wire rod for gas shielded welding wire is used in the welding state.
  • the alloy composition is designed and the design principle of each chemical element is As described below:
  • the increase in the mass percentage of C will increase the strength, reduce the elongation, and deteriorate the shaping and cold deformation ability.
  • the drawing performance is unfavorable. Therefore, in the technical solution of the present invention, the mass percentage of C is controlled to be C ⁇ 0.03%.
  • Mn In the wire rod for gas shielded welding wire with high weather resistance and low strength according to the present invention, Mn is used as a deoxidizing element. If the mass percentage of Mn is too high, it will increase the strength of the weld metal while also deteriorating the plastic toughness. Therefore, in the technical scheme of the present invention, the mass percentage of Mn is controlled to be 0.20-0.70%.
  • Si In the wire rod for gas shielded welding wire with high weather resistance and low strength according to the present invention, Si is a deoxidizing element. When the mass percentage of Si is too high, it will increase the strength through solid solution strengthening and affect the toughness of the deposited metal. When the mass percentage of Si is too low, the combined deoxidation of Si and Mn will be too weak to achieve the effect of deoxidation. Therefore, in the technical solution of the present invention, the mass percentage of Si is controlled to be 0.20 to 0.60%.
  • Ni is one of the main weather resistance elements. Ni can promote the transformation of austenite to acicular ferrite, reduce the transformation temperature of austenite to ferrite, and inhibit the formation of eutectoid ferrite. In addition, in order to avoid the brittle structure produced by Cr, it is necessary to add a certain amount of Ni content to balance. With the increase of Ni content in the weld metal, the low temperature toughness of the weld metal tends to be stable; but when the mass percentage of Ni is too high, the structure of the deposited metal will reach 100% bainite, and the strength will be higher than expected. It does not match the base metal. Based on this, in the technical solution of the present invention, the mass percentage of Ni is controlled to be 1.6-2.7%.
  • Cr In the wire rod for gas shielded welding wire with high weather resistance and low strength according to the present invention, Cr is one of the main weather resistance elements. In order to ensure the weather resistance of the material, a certain mass percentage of Cr needs to be added; however, when the mass percentage of Cr is too high, the possibility of brittle phases will increase. Therefore, in the technical solution of the present invention, the mass percentage of Cr is controlled to be 1.6-2.2%.
  • Cu In the wire rod for gas shielded welding wire with high weather resistance and low strength according to the present invention, Cu is one of the main weather resistance elements. In order to ensure the composite corrosion resistance of Cr, Ni, and Cu, a certain mass percentage of Cu is required; however, if the content of Cu is too high, the cracking tendency of the material will increase. Therefore, in the technical scheme of the present invention, the mass percentage of Cu is controlled to be 0.15-0.35%.
  • Ti In the wire rod for gas shielded welding wire with high weather resistance and low strength according to the present invention, Ti mainly plays a role of deoxidation and denitrification in the weld metal. In addition, Ti combines with O 2 in the molten pool to generate TiO, which provides a nucleation basis for acicular ferrite during solid phase transformation; at the same time, as a strong carbon and nitrogen compound forming element, their fine precipitates can refine the structure and improve welding. The toughness and plasticity of seam metal. A certain amount of Ti can significantly improve the welding processability of the welding wire and reduce spatter; but more Ti will greatly increase the strength of the weld metal, reduce its elongation and increase the viscosity of the molten pool. Therefore, in the technical scheme of the present invention, the mass percentage of Ti is controlled to be 0.01-0.07%.
  • Ni 1.8-2.2%.
  • Si 0.30 to 0.50%.
  • Mn 0.35 to 0.70%.
  • the wire rod for gas shielded welding wire of the present invention can also be added with rare earth elements, and the total mass percentage content of the rare earth elements is less than or equal to 0.1%.
  • the rare earth element may be cerium (Ce) or/and yttrium (Y), and its total mass percentage content is ⁇ 0.1%.
  • Rare earth elements are easy to react with other elements, which can refine the crystal grains, deoxidize and desulfurize, and improve the weld structure.
  • the microstructure of the deposited metal is ferrite + bainite.
  • the phase ratio of the ferrite of the deposited metal is 40-80%.
  • the tensile strength of the deposited metal is less than 650 MPa, and the weather resistance index I is greater than or equal to 10.
  • the value to be substituted is 100
  • the number before the semicolon, for example: the mass percentage of Cu is 0.35%, when substituting into the formula, the corresponding value is substituted into 0.35.
  • the weather resistance of ordinary low-alloy weathering steel is I ⁇ 6, and the high weather resistance and low strength wire rod for gas shielded welding wire of the present invention has weather resistance I ⁇ 10.
  • this technical solution designs the alloy elements in the above composition range to obtain the required structure ratio of the deposited metal by adjusting the alloy composition under the premise of ensuring high weather resistance, so as to ensure that the tensile strength of the joint is not as low as possible. Too high.
  • another object of the present invention is to provide a gas shielded welding wire, which can be used for welding of high weather resistant structural steel with a mechanical performance of 50 kg, such as S350EW steel, and is particularly suitable for, for example, new railway passenger cars. Welding production and manufacturing of structures such as, containers and construction machinery.
  • the present invention proposes a gas shielded welding wire with high weather resistance and low strength, which is made by using the above-mentioned wire rod for the gas shielded welding wire.
  • the welding gas used can be a binary gas mixed with argon and carbon dioxide, or a binary gas mixed with argon and oxygen; preferably, argon
  • the gas ratio of binary gas mixed with carbon dioxide can be 82% Ar+18% CO 2 or 90% Ar+10% CO 2 ; the gas ratio of binary gas mixed with argon and oxygen can be 98% Ar+ 2% O 2 .
  • the comprehensive mechanical properties and corrosion resistance of the welding wire deposited metal during the welding of the high weather resistance and low strength gas shielded welding wire of the present invention are equivalent to those of S350EW as the welding base material, and it has a wide range of process parameter adaptability and can take into account heat. Welding process of rolled plate and cold rolled plate thickness specification range.
  • Table 1 lists the mass percentages of the chemical elements smelted by the welding wires of Examples 1-5 and Comparative Examples 1-3.
  • the deposited metal test of the argon-rich gas shielded welding wire was carried out with a plate thickness of 20mm, a groove form of 60° single-sided V butt joint, and a bottom surface gap of 12mm, and the 1.2mm diameter welding wire was used.
  • a kv * at -40°C is the average value of the impact value of the CVN test of five welded specimens
  • the comparative sample of the deposited metal test plate is the railway Corrosion test of a new type of high weathering steel S350EW for passenger car materials, 72h, and the test results are shown in Table 3.
  • Relative corrosion rate
  • the metallographic structure observation of the deposited metal finally formed by the gas shielded welding wire and the wire rod of the embodiments 1-5 of the present invention shows that the microstructure of the deposited metal of each embodiment is ferrite + bainite Among them, the phase ratio of ferrite is 40-80%.
  • the comprehensive mechanical properties and corrosion resistance of the welding wire deposited metal of the high weather resistance and low strength gas shielded welding wire of the present invention are equivalent to those of S350EW as the welding base material, and the welding wire technology
  • the performance is relatively broad, and it can take into account both hot-rolled sheet specifications and cold-rolled sheet specifications.

Abstract

一种气体保护焊丝用盘条，其化学元素质量百分含量为：C≤0.03％，Mn：0.20～0.70％，Si：0.20～0.60％，Ni：1.6～2.7％，Cr：1.60～2.20％，Cu：0.15～0.35％，Ti：0.01～0.07％，余量为Fe及其他不可避免的杂质。公开了一种气体保护焊丝。该气体保护焊丝在焊接时的焊丝熔敷金属的综合力学性能和耐蚀性能与作为焊接母材的S350EW相当，工艺性能宽泛，兼顾热轧板规格与冷轧板规格。

Description

一种气体保护焊丝用盘条及焊丝 技术领域
本发明涉及一种焊丝用盘条及焊丝,尤其涉及一种气体保护焊丝用盘条及焊丝。
背景技术
最早的普通商用耐候钢，可以分为高磷铜加铬、镍的CorTen A系列、以铬锰合金化为主的CorTen B系列。第一代用于铁道车辆的耐候钢主要为CorTen A。第二代铁道车辆用耐候钢主要为不含P的Cu-Cr-Ni合金系的高强耐候钢，这二者的耐候性能相当。然而，这两种耐侯钢尚不能满足铁道车辆长寿命的要求。
因此，现有技术中还开发有第三代铁道车辆用新型高耐蚀型耐候钢，例如S350EW和S450EW钢。根据腐蚀调研结果显示，采用EW系列钢所制作的铁路货车，其耐腐蚀性能大大高于普通耐候钢和高强耐候钢。
基于此需要与耐候钢母材适配的焊丝，其材料的综合力学性能和耐候性能应该与母材匹配。
在已经公开的专利文献中，例如，公开号为CN102756219A，公开日为2012年10月31日，名称为“一种焊丝、盘条及其应用”的中国专利文献公开了一种盘条和焊丝。在该专利文献所公开的技术方案中，其是用于解决S450EW钢配气体保护焊丝问题，因而该焊丝熔敷金属的抗拉强度不小于650MPa。
但是，现有的这种焊丝并不适配S350EW钢，基于此，期望获得一种焊接材料，该焊接材料熔敷金属的综合力学性能和耐腐蚀性与母材S350EW相当，并且可以在保证耐候性能与母材S350EW相当的情况下，其力学性能也与母材相当(即力学性能为普通50公斤级别)。同时该焊接材料具有良好的焊接工艺性，足够宽的焊接工艺适应窗口。
发明内容
本发明的目的之一在于提供一种高耐候低强度的气体保护焊丝用盘条，该气体保护焊丝用盘条制得的焊丝在焊接时的焊丝熔敷金属的综合力学性能和耐蚀性能与作为焊接母材的S350EW相当，且焊丝的工艺性能较为宽泛，可以兼顾热轧板规格与冷轧板规格。
为了实现上述目的，本发明提出了一种高耐候低强度的气体保护焊丝用盘条，其化学元素质量百分含量为：
C≤0.03％，
Mn：0.20～0.70％，
Si：0.20～0.60％，
Ni：1.6～2.7％，
Cr：1.60～2.20％，
Cu：0.15～0.35％，
Ti：0.01～0.07％，
余量为Fe及其他不可避免的杂质。
在本发明所述的技术方案中，气体保护焊丝用盘条是在焊态下使用，为了达到良好的耐腐蚀性能以及综合力学性能，因此，对其合金成分进行设计，各化学元素的设计原理如下所述：
C：在本发明所述的高耐候低强度的气体保护焊丝用盘条中，C的质量百分比增加，会使得强度增加，延伸率降低，塑形和冷变形能力变差，对焊丝盘条的拉拔性能不利，因此，在本发明所述的技术方案中控制C的质量百分比在C≤0.03％。
Mn：在本发明所述的高耐候低强度的气体保护焊丝用盘条中，Mn作为脱氧元素。若Mn的质量百分比过高，则在提高焊缝金属强度的同时，也会使塑韧性变差，因此，在本发明所述的技术方案中控制Mn的质量百分比在0.20～0.70％。
Si：在本发明所述的高耐候低强度的气体保护焊丝用盘条中，Si为脱氧元素。当Si的质量百分比太高，则会通过固溶强化提高强度并影响熔敷金属的韧性，当Si的质量百分比太低，Si、Mn联合脱氧过弱，无法达到脱氧的效果。因此，在本发明所述的技术方案中控制Si的质量百分比为0.20～0.60％。
Ni：在本发明所述的高耐候低强度的气体保护焊丝用盘条中，Ni是主要的 耐候性元素之一。Ni可以促进奥氏体向针状铁素体转变，同时降低奥氏体向铁素体的相变温度，抑制共析铁素体的形成。此外，为了避免Cr所产生的脆性组织，需要加入一定量的Ni含量来平衡。随着焊缝金属中Ni含量的提高，焊缝金属的低温韧性趋于稳定；但Ni的质量百分比过高时，熔敷金属的组织会达到100％的贝氏体，强度将高于希望达到的水平，而与母材不匹配。基于此，在本发明所述的技术方案中控制Ni的质量百分比为1.6～2.7％。
Cr：在本发明所述的高耐候低强度的气体保护焊丝用盘条中，Cr是主要的耐候性元素之一。为保证材料的耐候性能，需要添加一定质量百分比的Cr；但当Cr的质量百分比过高，会增加脆性相产生的可能性。因此，在本发明所述的技术方案中控制Cr的质量百分比为1.6～2.2％。
Cu：在本发明所述的高耐候低强度的气体保护焊丝用盘条中，Cu是主要的耐候性元素之一。为保证Cr、Ni、Cu的复合耐腐蚀性效果，需要一定质量百分比的Cu；但若Cu的含量过高，会增加材料的开裂倾向。因此，在本发明所述的技术方案中控制Cu的质量百分比为0.15～0.35％。
Ti：在本发明所述的高耐候低强度的气体保护焊丝用盘条中，Ti在焊缝金属中主要起到脱氧、脱氮作用。此外，Ti在熔池内与O 2结合生成TiO,在固态相变时为针状铁素体提供形核基础；同时作为强碳氮化合物形成元素，它们的细小析出相可细化组织，提高焊缝金属的强韧性与塑性。一定量的Ti可以明显改善焊丝的焊接工艺性，减小飞溅；但较多的Ti会大幅提高焊缝金属的强度，并降低其延伸率以及增加熔池的粘性。因此，在本发明所述的技术方案中，控制Ti的质量百分比在0.01～0.07％。
进一步地，在本发明所述的气体保护焊丝用盘条中，其中Ni：1.8～2.2％。
进一步地，在本发明所述的气体保护焊丝用盘条中，其中Si：0.30～0.50％。
进一步地，在本发明所述的气体保护焊丝用盘条中，其中Mn：0.35～0.70％。
进一步地，在本发明所述的气体保护焊丝用盘条中，其中Ti：0.04～0.07％。
进一步地，在本发明所述的气体保护焊丝用盘条，在其他不可避免的杂质中，P≤0.015％，并且/或者S≤0.015％。
上述方案中，杂质元素质量百分比越低，钢质就越纯净，韧性会越好，但综合炼钢成本的因素，因此，优选地可以控制P、S的质量百分比在P≤0.015％，S≤0.015％。
进一步地，本发明所述的气体保护焊丝用盘条还可以添加稀土元素，稀土元素的总质量百分比含量≤0.1％。例如，稀土元素可以为铈(Ce)或/和钇(Y)，其总质量百分比含量≤0.1％。稀土元素易于与其它元素发生反应，可以起到细化晶粒、脱氧脱硫作用，从而改善焊缝组织。
进一步地，在本发明所述的气体保护焊丝用盘条中，其熔敷金属的微观组织为铁素体+贝氏体。
进一步地，在本发明所述的气体保护焊丝用盘条中，其熔敷金属的铁素体的相比例为40-80％。
进一步地，在本发明所述的气体保护焊丝用盘条中，其熔敷金属的抗拉强度＜650MPa，并且耐候性指数I≥10。
需要说明的是，在本发明所述的高耐候低强度的气体保护焊丝用盘条中，耐候性的级别可通过耐候性指数公式来描，耐候性指数I＝26.01Cu+3.88Ni+1.20Cr+1.49Si+17.28P-7.29Cu×Ni-9.10Ni×P-33.39Cu 2，其中Cu、Ni、Cr、Si以及P分别表示相应元素的质量百分比，在代入公式中时，代入的数值为百分号前的数字，例如：Cu的质量百分比为0.35％，则代入公式时，相应的数值代入为0.35。通常普通的低合金耐候钢的耐候性为I≥6，而本发明所述的高耐候低强度的气体保护焊丝用盘条，其耐候性I≥10。
另外，通常而言，材料的耐候性越高，其抗拉强度也会随之越高。因此，本技术方案的难点和重点在于，在保证高耐候性的同时，还要实现气体保护焊丝熔敷金属的抗拉强度＜650MPa，同时具有较好的低温冲击韧性以及可焊性。基于此，本技术方案设计了上述成分范围的合金元素，以在保证高耐候性的前提下，通过调整合金成分从而获得所需要的熔敷金属的组织比例，以保证接头的抗拉强度不至于过高。
相应地，本发明的另一目的在于提供一种气体保护焊丝，该气体保护焊丝可适用于力学性能为普通50公斤级别的高耐候结构钢的焊接，如S350EW钢，特别适用于例如新型铁路客车、集装箱、工程机械等结构的焊接生产与制造。
为了实现上述目的，本发明提出了一种高耐候低强度的气体保护焊丝，其采用上述的气体保护焊丝用盘条制得。
需要说明的是，在采用本发明所述的气体保护焊丝进行焊接时，采用的焊接气体可以为氩气与二氧化碳混合的二元气体，或者氩气与氧气混合的二元气 体；优选地，氩气与二氧化碳混合的二元气体气体比例可以为82％Ar+18％CO 2，或者为90％Ar+10％CO 2；氩气与氧气混合的二元气体的气体比例可以为98％Ar+2％O 2。
本发明所述的高耐候低强度的气体保护焊丝用盘条及焊丝具有如下所述的优点以及有益效果：
本发明所述的高耐候低强度的气体保护焊丝焊接时的焊丝熔敷金属的综合力学性能和耐蚀性能与作为焊接母材的S350EW相当，且具有较为宽泛的工艺参数适应性，能兼顾热轧板与冷轧板厚度规格范围的焊接工艺。
具体实施方式
下面将结合具体的实施例对本发明所述的高耐候低强度的气体保护焊丝用盘条及焊丝做进一步的解释和说明，然而该解释和说明并不对本发明的技术方案构成不当限定。
实施例1-5及对比例1-3
实施例1-5及对比例1-3的气体保护焊丝采用以下步骤制得：
(1)冶炼后经连铸或模铸得到钢锭，所获得成分如表1所示。
(2)钢锭通过轧制得到φ5.5mm的盘条。
(3)盘条进行粗拉拔、中间退火处理、精拉拔和镀铜工艺后，最终获得φ1.0mm或φ1.2mm的焊丝。
表1列出了实施例1-5及对比例1-3焊丝冶炼的各化学元素的质量百分配比。
表1.(％，余量为Fe和除了P、S以外的其他不可避免的杂质)
Figure PCTCN2020122395-appb-000001
Figure PCTCN2020122395-appb-000002
注：表中耐候性指数I＝26.01Cu+3.88Ni+1.20Cr+1.49Si+17.28P-7.29Cu×Ni-9.10Ni×P-33.39Cu 2
采用板厚20mm，坡口形式为60°单面V型对接，底面间隙12mm的方式进行富氩气体保护焊丝的熔敷金属试验，均采用1.2mm直径焊丝完成。气体比例：90％Ar+10％CO 2，焊前不预热，层间温度控制在150℃，焊接时，各个实施例的气体保护焊丝电弧稳定，铺展性好，飞溅极少，焊缝成形美观，可以用于全位置焊接。随后对实施例1-5及对比例1-3的气体保护焊丝所形成的熔敷金属进行拉伸试样和冲击试验，试验按照标准GB/T 8110《气体保护电弧焊用碳钢、低合金钢焊丝》执行。拉伸和冲击试验分别按照5.4.4和5.4.5章节进行试样加工和检测，结果列于表2。
表2.
Figure PCTCN2020122395-appb-000003
注：-40℃条件下A kv*的数值为五个熔敷试样CVN试验的冲击数值平均值；
由表2可以看出，本发明各实施例的气体保护焊丝的熔敷金属的抗拉强度均低于650MPa，并且结合表1可以看出，各实施例的耐候性指数I≥10。
参照标准TB/T2375《铁路用耐候钢周期浸润腐蚀试验方法》对上述的实施例1-5的气体保护焊丝所形成的熔敷金属进行腐蚀试样，熔敷金属试板的对比试样为铁路客车材料新型高耐候钢S350EW，72h的腐蚀试验，试验结果列于表3。
表3.
Figure PCTCN2020122395-appb-000004
注：相对腐蚀率＝|母材腐蚀失重量-熔敷金属腐蚀失重量|/母材腐蚀失重量×100％
结合表2和表3可以看出，本发明各实施例的气体保护焊丝焊接时的焊丝熔敷金属的综合力学性能和耐蚀性能与作为焊接母材的S350EW相当，且焊丝的工艺性能较为宽泛，可以兼顾热轧板规格与冷轧板规格。
此外，对于本发明的实施例1-5的气体保护焊丝及盘条最终形成的熔敷金属取样进行金相组织观察可以发现，各个实施例的熔敷金属的微观组织为铁素体+贝氏体，且其中，铁素体的相比例为40-80％。
综上所述可以看出，本发明所述的高耐候低强度的气体保护焊丝在焊接时的焊丝熔敷金属的综合力学性能和耐蚀性能与作为焊接母材的S350EW相当，且焊丝的工艺性能较为宽泛，可以兼顾热轧板规格与冷轧板规格。
需要说明的是，本发明的保护范围中现有技术部分并不局限于本申请文件所给出的实施例，所有不与本发明的方案相矛盾的现有技术，包括但不局限于在先专利文献、在先公开出版物，在先公开使用等等，都可纳入本发明的保护范围。
此外，本发明中各技术特征的组合方式并不限本发明权利要求中所记载的组合方式或是具体实施例所记载的组合方式，本发明记载的所有技术特征可以以任何方式进行自由组合或结合，除非相互之间产生矛盾。
还需要注意的是，以上所列举的实施例仅为本发明的具体实施例。显然本发明不局限于以上实施例，随之做出的类似变化或变形是本领域技术人员能从本发明公开的内容直接得出或者很容易便联想到的，均应属于本发明的保护范围。

Claims (11)

  1. 一种气体保护焊丝用盘条，其特征在于，其化学元素质量百分含量为：
    C≤0.03％，
    Mn：0.20～0.70％，
    Si：0.20～0.60％，
    Ni：1.6～2.7％，
    Cr：1.60～2.20％，
    Cu：0.15～0.35％，
    Ti：0.01～0.07％，
    余量为Fe及其他不可避免的杂质。
  2. 如权利要求1所述的气体保护焊丝用盘条，其特征在于，其中Ni：1.8～2.2％。
  3. 如权利要求1所述的气体保护焊丝用盘条，其特征在于，其中Si：0.30～0.50％。
  4. 如权利要求1所述的气体保护焊丝用盘条，其特征在于，其中Mn：0.35～0.70％。
  5. 如权利要求1所述的气体保护焊丝用盘条，其特征在于，其中Ti：0.04～0.07％。
  6. 如权利要求1所述的气体保护焊丝用盘条，其特征在于，还含有稀土元素，其质量百分比含量≤0.1％。
  7. 如权利要求1所述的气体保护焊丝用盘条，其特征在于，在其他不可避免的杂质中，P≤0.015％，并且/或者S≤0.015％。
  8. 如权利要求1所述的气体保护焊丝用盘条，其特征在于，其熔敷金属的微观组织为铁素体+贝氏体。
  9. 如权利要求8所述的气体保护焊丝用盘条，其中所述铁素体的相比例为40-80％。
  10. 如权利要求1-9中任意一项所述的气体保护焊丝用盘条，其特征在于，其熔敷金属的抗拉强度＜650MPa，并且耐候性指数I≥10。
  11. 一种气体保护焊丝，其采用如权利要求1-10中任意一项所述的气体保护 焊丝用盘条制得。
PCT/CN2020/122395 2019-10-21 2020-10-21 一种气体保护焊丝用盘条及焊丝 WO2021078136A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US17/766,396 US20240058900A1 (en) 2019-10-21 2020-10-21 Wire rod for gas shielded welding wire and welding wire
EP20879814.0A EP4026652A4 (en) 2019-10-21 2020-10-21 WIRE ROD FOR GAS PROTECTION WELDING WIRE, AND WELDING WIRE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910998451.1A CN112756844A (zh) 2019-10-21 2019-10-21 一种高耐候低强度的气体保护焊丝用盘条及焊丝
CN201910998451.1 2019-10-21

Publications (1)

Publication Number Publication Date
WO2021078136A1 true WO2021078136A1 (zh) 2021-04-29

Family

ID=75619642

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/122395 WO2021078136A1 (zh) 2019-10-21 2020-10-21 一种气体保护焊丝用盘条及焊丝

Country Status (4)

Country Link
US (1) US20240058900A1 (zh)
EP (1) EP4026652A4 (zh)
CN (1) CN112756844A (zh)
WO (1) WO2021078136A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113681198A (zh) * 2020-05-18 2021-11-23 宝山钢铁股份有限公司 一种高耐候低飞溅的气体保护焊丝用盘条及焊丝
CN115488544A (zh) * 2021-06-18 2022-12-20 宝山钢铁股份有限公司 一种抗拉强度600MPa级的耐候气体保护焊丝用盘条及焊丝

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03221294A (ja) * 1990-01-23 1991-09-30 Kobe Steel Ltd 高張力鋼用ｍｉｇワイヤ
JP2004261858A (ja) * 2003-03-04 2004-09-24 Jfe Steel Kk マルテンサイト系ステンレス鋼管溶接用ワイヤ
CN1611321A (zh) * 2003-10-27 2005-05-04 宝山钢铁股份有限公司 耐候气体保护焊丝
CN102658440A (zh) * 2012-04-24 2012-09-12 宝山钢铁股份有限公司 一种铁道车辆用高耐蚀型的耐候埋弧焊丝及盘条
CN102756219A (zh) 2011-04-25 2012-10-31 宝山钢铁股份有限公司 一种焊丝、盘条及其应用
CN104741822A (zh) * 2013-12-27 2015-07-01 上海大西洋焊接材料有限责任公司 一种气保焊丝
CN106216877A (zh) * 2016-07-26 2016-12-14 江苏省沙钢钢铁研究院有限公司 一种焊接性优异的高耐候气体保护焊丝
CN108857137A (zh) * 2018-06-29 2018-11-23 中国石油天然气集团有限公司 一种高强度连续管用气保焊丝

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3672746B2 (ja) * 1998-09-01 2005-07-20 株式会社神戸製鋼所 ガスシールドアーク溶接用ソリッドワイヤ
JP2002336989A (ja) * 2001-05-16 2002-11-26 Sumikin Welding Ind Ltd 海浜耐候性鋼用溶接材料
CN103028865B (zh) * 2012-12-18 2015-07-01 钢铁研究总院 高耐蚀气体保护焊丝
CN105234584B (zh) * 2015-08-13 2018-03-16 武汉铁锚焊接材料股份有限公司 一种高耐蚀型耐候钢用气体保护实心焊丝
CN105397332B (zh) * 2015-11-26 2018-10-09 钢铁研究总院 铁道货车用高耐蚀药芯焊丝
CN109175786B (zh) * 2018-10-31 2021-04-16 首钢集团有限公司 一种高强度耐候气体保护焊丝用盘条

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03221294A (ja) * 1990-01-23 1991-09-30 Kobe Steel Ltd 高張力鋼用ｍｉｇワイヤ
JP2004261858A (ja) * 2003-03-04 2004-09-24 Jfe Steel Kk マルテンサイト系ステンレス鋼管溶接用ワイヤ
CN1611321A (zh) * 2003-10-27 2005-05-04 宝山钢铁股份有限公司 耐候气体保护焊丝
CN102756219A (zh) 2011-04-25 2012-10-31 宝山钢铁股份有限公司 一种焊丝、盘条及其应用
CN102658440A (zh) * 2012-04-24 2012-09-12 宝山钢铁股份有限公司 一种铁道车辆用高耐蚀型的耐候埋弧焊丝及盘条
CN104741822A (zh) * 2013-12-27 2015-07-01 上海大西洋焊接材料有限责任公司 一种气保焊丝
CN106216877A (zh) * 2016-07-26 2016-12-14 江苏省沙钢钢铁研究院有限公司 一种焊接性优异的高耐候气体保护焊丝
CN108857137A (zh) * 2018-06-29 2018-11-23 中国石油天然气集团有限公司 一种高强度连续管用气保焊丝

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4026652A4

Also Published As

Publication number Publication date
EP4026652A1 (en) 2022-07-13
EP4026652A4 (en) 2022-12-14
CN112756844A (zh) 2021-05-07
US20240058900A1 (en) 2024-02-22

Similar Documents

Publication Publication Date Title
JP6415453B2 (ja) 高耐食性高強度のＡｌ含有耐候性鋼板及びその製造方法
EP3225349B1 (en) Super high strength gas shielded welding wire containing v and manufacturing method therefor
WO2015088040A1 (ja) 鋼板およびその製造方法
CN111926259B (zh) 一种大线能量焊接用低合金钢及其制备方法
CN111235464B (zh) 一种钛微合金化经济型高强耐候钢及其生产方法
WO2002022893A1 (fr) Tole d'acier plaquee trempee a chaud presentant une resistance elevee a la traction et son procede de fabrication
CN109175786A (zh) 一种高强度耐候气体保护焊丝用盘条
CN102756219B (zh) 一种焊丝、盘条及其应用
WO2023103514A1 (zh) 一种抗酸性能优良的管线钢及其制造方法
WO2021078136A1 (zh) 一种气体保护焊丝用盘条及焊丝
KR20160127808A (ko) 고장력 강판 및 그 제조 방법
CN113637911B (zh) 一种800MPa级抗大线能量焊接压力容器用钢及其制备方法
CN102839320B (zh) 一种大线能量焊接用钢板及其制造方法
CN116716544B (zh) 一种海洋工程用圆钢及其制备方法
CN112719692A (zh) 一种900MPa级高强钢气保护实心焊丝及其制备方法
WO2021233228A1 (zh) 一种气体保护焊丝用盘条及一种气体保护焊丝
JP4116817B2 (ja) 低温靭性と変形能に優れた高強度鋼管および鋼管用鋼板の製造法
CN112760567B (zh) 一种韧性优异的高速列车转向架用钢板及其制造方法
CN114717482A (zh) 一种低屈强比稀土钛耐候钢及其生产方法
CN114737125A (zh) 一种低屈强比稀土铌耐候钢及其生产方法
JP4539100B2 (ja) 超大入熱溶接熱影響部靭性に優れた非調質高強度厚鋼板の製造方法
JP7207199B2 (ja) 鋼材及びその製造方法
JP3854412B2 (ja) 溶接熱影響部靱性に優れた耐サワー鋼板およびその製造法
CN111154962A (zh) 一种抗震耐蚀耐火钢及其制备方法
CN114990441B (zh) 一种用于-70℃环境下的耐候钢及生产方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20879814

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 17766396

Country of ref document: US

ENP Entry into the national phase

Ref document number: 2020879814

Country of ref document: EP

Effective date: 20220407

NENP Non-entry into the national phase

Ref country code: DE