WO2023134149A1 - Tc4 titanium alloy submerged arc welding flux, a preparation method therefor and application thereof - Google Patents

Tc4 titanium alloy submerged arc welding flux, a preparation method therefor and application thereof Download PDF

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Publication number
WO2023134149A1
WO2023134149A1 PCT/CN2022/109612 CN2022109612W WO2023134149A1 WO 2023134149 A1 WO2023134149 A1 WO 2023134149A1 CN 2022109612 W CN2022109612 W CN 2022109612W WO 2023134149 A1 WO2023134149 A1 WO 2023134149A1
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titanium alloy
arc welding
submerged arc
welding flux
alloy submerged
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PCT/CN2022/109612
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French (fr)
Chinese (zh)
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徐锴
黄瑞生
冯伟
郭枭
贾立超
尹立孟
武鹏博
陈玉华
邹吉鹏
方乃文
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哈尔滨焊接研究院有限公司
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Priority to JP2024504588A priority Critical patent/JP2024530435A/en
Publication of WO2023134149A1 publication Critical patent/WO2023134149A1/en

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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
    • B23K35/32—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C
    • 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
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/18—Submerged-arc welding

Definitions

  • the invention belongs to the technical field of welding materials, and in particular relates to a TC4 titanium alloy submerged arc welding flux and a preparation method and application thereof.
  • TC4 titanium alloy is an important structural material, because of its excellent comprehensive properties (low density, high specific strength, stable corrosion resistance and high temperature resistance, etc.), it is widely used in aerospace, deep submersibles and weaponry and other fields .
  • the filling welding of TC4 titanium alloy thick-walled components mostly adopts MIG shielded welding and laser wire filling welding.
  • the multi-layer welding process not only restricts the substantial improvement of its efficiency, but also increases the probability of welding defects due to the multi-pass filling during the welding process, and at the same time, repeated heating will also cause the grain coarsening of the structure.
  • ultra-narrow gap welding technology will also cause defects such as poor fusion of side walls, pore slag inclusions, etc., and put forward higher requirements for welding equipment and processes. Therefore, it is urgent to find a welding material that is simple and efficient, has a low probability of defect occurrence, and has high reliability to solve the technical problems in the field of welding thick-walled titanium alloys.
  • the present invention provides a TC4 titanium alloy submerged arc welding flux and its preparation method and application.
  • the present invention provides the following technical solutions:
  • the invention provides a TC4 titanium alloy submerged arc welding flux, which is prepared from a binder and powder, and the powder is composed of BaCl 2 : 4.5%-5.5%, LiF: 1.8%-2.1%, NaF : 4.8% ⁇ 5.1% and the balance of CaF 2 mixed.
  • the binder is high modulus potassium sodium water glass with a modulus of 2.8-3.1 and a potassium-sodium ratio of 3:1.
  • the mass fraction of the binder in the flux is 3%-5%.
  • the powder is formed by mixing BaCl 2 : 5%, LiF : 2%, NaF : 5% and the balance of CaF 2 in mass fraction.
  • the mass percentage of H in the powder is ⁇ 0.003%
  • the mass percentage of N is ⁇ 0.005%
  • the mass percentage of O is ⁇ 0.010%
  • the mass percentage of S is ⁇ 0.003%
  • the mass percentage of P is ⁇ 0.003%.
  • the present invention provides the preparation method of TC4 titanium alloy submerged arc welding flux described in the above scheme, which is carried out in the following steps:
  • Step 1 Mix and dry mix the raw material powders according to the powder ratio for 3 minutes to 5 minutes, then add the binder and continue stirring for 4 minutes to 6 minutes to obtain the mixture;
  • Step 2 drying the mixture obtained in step 1 at low temperature, then sintering at high temperature, cooling to room temperature and then sieving to obtain TC4 titanium alloy submerged arc welding flux.
  • the parameters of the low-temperature drying in step 2 are: the temperature is 180-230° C., and the time is 35 minutes-60 minutes.
  • the parameters of the high-temperature sintering in step 2 are: the temperature is 700-900° C., and the time is 50 min-70 min.
  • the size of the sieve in step 2 is 10-80 mesh.
  • the present invention provides the application of the TC4 titanium alloy submerged arc welding flux described in the above scheme for TC4 titanium alloy submerged arc welding.
  • TC4 titanium alloy submerged arc welding flux is used in conjunction with the TC4 titanium alloy submerged arc welding wire.
  • TC4 titanium alloy submerged arc welding flux and TC4 titanium alloy submerged arc welding wire are used together to carry out the chemical composition and content of weld deposit metal after TC4 titanium alloy submerged arc welding: C: ⁇ 0.04wt%, Al: 5.20wt % ⁇ 5.45wt%, V: 4.20wt% ⁇ 4.80wt%, Fe: 0.10wt% ⁇ 0.20wt%, Li: 0.15wt% ⁇ 0.20wt%, Mn: ⁇ 0.015wt%, P ⁇ 0.01wt%, S ⁇ 0.02wt%, N: ⁇ 0.02wt%, the balance is Ti.
  • the main core means of regulating the structure and properties of titanium alloy submerged arc welding joints is to adjust the microstructure by changing the composition of submerged arc welding wire and flux, so as to optimize the mechanical properties of welded joints.
  • the invention proposes a TC4 titanium alloy submerged arc flux, which supplements the burning loss of elements in the welding process, adds beneficial elements to the weld seam, uses submerged arc welding technology to perform high-efficiency and high-quality welding of thick-walled titanium alloy components, and realizes welding joints The control of tissue performance finally obtains high-quality welded joints.
  • the invention scientifically adjusts the proportions of components of the flux, and optimizes the viscosity, surface tension and fluidity of molten slag.
  • CaF2 is mainly used to suppress the transition of harmful elements such as H, O, N to the weld, control the content of S and P in the weld, which is beneficial to reduce the melting point of the flux, and ensure the purity of the weld metal and the process performance of the flux ;
  • CaF 2 can also increase the gas permeability of slag, reduce the viscosity of slag, and make the slag removal performance better; The fluidity of the slag is improved, and the weld pool is isolated and protected in time; but too much CaF 2 will cause the electrical conductivity to be too high and the viscosity of the slag to decrease, which will affect the stability of the slag formation process, thereby affecting the weld formation.
  • the welding slag generated by adding BaCl 2 to the flux can evenly cover the surface of the weld metal, reduce the cooling rate of the weld metal, control the content of ⁇ ' martensite, and obtain good weld formation.
  • An appropriate content of BaCl2 can ensure that the slag has an appropriate melting point and density, and can remove harmful impurities such as sulfur and phosphorus in the weld to ensure the purity of the weld, thereby ensuring the impact toughness of the weld.
  • BaCl 2 has a lower melting point than BaF 2 , which can reduce the welding heat input during the welding process, thereby ensuring the refinement of the weld microstructure.
  • the addition of BaCl2 significantly reduces the content of O and N in the weld, thus ensuring the impact toughness of the weld.
  • Adding LiF to the flux can also reduce the melting point of the flux and improve the process performance of the flux; in addition, by strictly controlling the content of metal Li in the flux, the transformation temperature of the ⁇ phase in the weld metal can be significantly increased, and the residual ⁇ phase can be refined. Thereby, the ductility and toughness of the weld metal can be improved.
  • Adding NaF and LiF to the flux can combine with H in the weld to form HF gas overflow, which is beneficial to reduce the partial pressure of H in the arc atmosphere, thereby dehydrogenating and reducing the generation of hydrogen-induced cracks.
  • Adding an appropriate amount of high modulus potassium sodium water glass to the flux can improve the arc stability and increase the alkalinity of the flux.
  • the content of high modulus potassium sodium water glass in water glass is greater than 5%, the hydrogen content in the weld tends to increase significantly, so the mass fraction of high modulus potassium sodium water glass in the flux is controlled at 3% to 5%.
  • a kind of TC4 titanium alloy submerged arc welding flux of the present embodiment is prepared from binder and powder, wherein powder is composed of BaCl 2 : 4.5%, LiF: 2.0%, NaF: 4.9% and the CaF of balance 2 mixed, the binder is high modulus potassium sodium water glass, the modulus is 2.8 to 3.1, the potassium-sodium ratio is 3:1, the mass fraction of the binder in the flux is 4%, and the powder
  • the mass percentage content of H in the material is ⁇ 0.003%
  • the mass percentage content of N is ⁇ 0.005%
  • the mass percentage content of O is ⁇ 0.010%
  • the mass percentage content of S is ⁇ 0.003%
  • the mass percentage content of P is ⁇ 0.003%.
  • Described flux preparation method is carried out as follows:
  • Step 1 Mix and dry mix the raw material powders according to the powder ratio for 4 minutes, then add the binder and continue stirring for 5 minutes to obtain the mixture;
  • Step 2 Dry the mixture obtained in step 1 at low temperature at 200°C for 45 minutes, then sinter at 800°C for 60 minutes at high temperature, cool to room temperature and pass through an 80-mesh sieve to obtain TC4 titanium alloy submerged arc welding flux.
  • a kind of TC4 titanium alloy submerged arc welding flux of the present embodiment is prepared from binder and powder, wherein the powder consists of BaCl 2 : 5%, LiF: 2.1%, NaF: 5.1% and the CaF of the balance 2 mixed, the binder is high modulus potassium sodium water glass, the modulus is 2.8 to 3.1, the potassium-sodium ratio is 3:1, the mass fraction of the binder in the flux is 4%, and the powder
  • the mass percentage content of H in the material is ⁇ 0.003%
  • the mass percentage content of N is ⁇ 0.005%
  • the mass percentage content of O is ⁇ 0.010%
  • the mass percentage content of S is ⁇ 0.003%
  • the mass percentage content of P is ⁇ 0.003%.
  • Described flux preparation method is carried out as follows:
  • Step 1 Mix and dry mix the raw material powders according to the powder ratio for 4 minutes, then add the binder and continue stirring for 5 minutes to obtain the mixture;
  • Step 2 Dry the mixture obtained in step 1 at low temperature at 200°C for 45 minutes, then sinter at 800°C for 60 minutes at high temperature, cool to room temperature and pass through an 80-mesh sieve to obtain TC4 titanium alloy submerged arc welding flux.
  • the TC4 titanium alloy submerged arc welding flux of Embodiment 1 ⁇ 2 is used for TC4 titanium alloy submerged arc welding, and the specific process is as follows:
  • the TC4 titanium alloy submerged arc welding flux of Examples 1-2 is used in conjunction with the TC4 titanium alloy submerged arc welding wire with a diameter of 4.0mm for multi-layer multilayer submerged arc welding.
  • the base material is a TC4 titanium alloy plate with a specification of 300mm ⁇ 200mm ⁇ 30mm, process V-shaped groove, single-side groove angle is 30°, groove blunt edge is 5mm, groove root gap is 10mm, a total of 12 weldings are completed to complete the test plate welding, and the interlayer temperature is controlled within 100°C.
  • AC welding power supply Table 1 is the welding process parameters
  • Table 2 is the chemical composition of the weld deposited metal
  • Table 3 is the test results of the mechanical properties of the welded joint.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Nonmetallic Welding Materials (AREA)
  • Arc Welding In General (AREA)

Abstract

A TC4 titanium alloy submerged arc welding flux, prepared from an adhesive and powder, wherein the powder is formed by mixing, by mass fraction, 4.5% to 5.5% of BaCl2, 1.8% to 2.1% of LiF, 4.8% to 5.1% of NaF, and the remainder being CAF2. The preparation method for the TC4 titanium alloy submerged arc welding flux comprises: mixing and dry-stirring raw material powder according to a powder proportion, then adding an adhesive and continue stirring to obtain a mixture; and drying the obtained mixture at a low temperature, then sintering same at a high temperature, cooling same to room temperature, and sieving same to obtain the TC4 titanium alloy submerged arc welding flux. According to the welding flux, the proportion of each component of the welding flux is set, the viscosity, surface tension and fluidity of molten slag are optimized, and when the welding flux is used in conjunction with a TC4 titanium alloy submerged arc welding wire for submerged arc welding, good welding process performance and mechanical performance are achieved. The present invention also relates to an application of the submerged arc welding flux.

Description

一种TC4钛合金埋弧焊剂及其制备方法和应用A kind of TC4 titanium alloy submerged arc welding flux and its preparation method and application
本申请要求于2022年01月11日提交中国专利局、申请号为202210025891.0、发明名称为“一种TC4钛合金埋弧焊剂及其制备方法和应用”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application submitted to the China Patent Office on January 11, 2022, with the application number 202210025891.0, and the title of the invention is "a TC4 titanium alloy submerged arc welding flux and its preparation method and application", the entire content of which Incorporated in this application by reference.
技术领域technical field
本发明属于焊接材料技术领域，具体涉及一种TC4钛合金埋弧焊剂及其制备方法和应用。The invention belongs to the technical field of welding materials, and in particular relates to a TC4 titanium alloy submerged arc welding flux and a preparation method and application thereof.
背景技术Background technique
TC4钛合金是一种重要的结构材料，因其优异的综合性能(密度小、比强度高、耐腐蚀性和耐高温性能稳定等)被广泛应用于航空航天、深潜器以及武器装备等领域。目前，TC4钛合金厚壁构件填充焊接多采用熔化极气体保护焊和激光填丝焊，虽然上述两种焊接方法可以采用窄间隙加工坡口的形式来提高焊接效率，但是仍然需要采用单道多层焊接工艺，不但制约其效率的大幅提升，在焊接过程中由于多道次的填充增加了产生焊接缺陷的概率，同时多次的反复加热也会引发组织晶粒的粗化。此外，超窄间隙焊接技术也会带来侧壁熔合不良，气孔夹渣等缺陷，并对焊接设备和工艺提出了较高的要求。因此，一种简单高效、缺陷发生概率低、可靠性高的焊接材料以解决目前厚壁钛合金焊接领域存在的技术问题是迫切的。TC4 titanium alloy is an important structural material, because of its excellent comprehensive properties (low density, high specific strength, stable corrosion resistance and high temperature resistance, etc.), it is widely used in aerospace, deep submersibles and weaponry and other fields . At present, the filling welding of TC4 titanium alloy thick-walled components mostly adopts MIG shielded welding and laser wire filling welding. The multi-layer welding process not only restricts the substantial improvement of its efficiency, but also increases the probability of welding defects due to the multi-pass filling during the welding process, and at the same time, repeated heating will also cause the grain coarsening of the structure. In addition, ultra-narrow gap welding technology will also cause defects such as poor fusion of side walls, pore slag inclusions, etc., and put forward higher requirements for welding equipment and processes. Therefore, it is urgent to find a welding material that is simple and efficient, has a low probability of defect occurrence, and has high reliability to solve the technical problems in the field of welding thick-walled titanium alloys.
发明内容Contents of the invention
本发明为解决上述技术问题，而提供了一种TC4钛合金埋弧焊剂及其制备方法和应用。In order to solve the above technical problems, the present invention provides a TC4 titanium alloy submerged arc welding flux and its preparation method and application.
为了实现上述目的，本发明提供以下技术方案：In order to achieve the above object, the present invention provides the following technical solutions:
本发明提供了一种TC4钛合金埋弧焊剂，由粘合剂和粉料制备而成，所述粉料按质量分数由BaCl 2：4.5％～5.5％，LiF：1.8％～2.1％，NaF：4.8％～5.1％和余量的CaF 2混合而成。 The invention provides a TC4 titanium alloy submerged arc welding flux, which is prepared from a binder and powder, and the powder is composed of BaCl 2 : 4.5%-5.5%, LiF: 1.8%-2.1%, NaF : 4.8% ~ 5.1% and the balance of CaF 2 mixed.
进一步限定，所述粘合剂为高模钾钠水玻璃，模数为2.8～3.1，钾钠 比为3:1。It is further defined that the binder is high modulus potassium sodium water glass with a modulus of 2.8-3.1 and a potassium-sodium ratio of 3:1.
进一步限定，所述焊剂中粘合剂的质量分数为3％～5％。It is further defined that the mass fraction of the binder in the flux is 3%-5%.
进一步限定，所述粉料按质量分数由BaCl 2：5％，LiF：2％，NaF：5％和余量的CaF 2混合而成。 It is further defined that the powder is formed by mixing BaCl 2 : 5%, LiF : 2%, NaF : 5% and the balance of CaF 2 in mass fraction.
进一步限定，所述粉料中H质量百分含量≤0.003％，N质量百分含量≤0.005％，O质量百分含量≤0.010％，S质量百分含量≤0.003％，P质量百分含量≤0.003％。It is further defined that the mass percentage of H in the powder is ≤0.003%, the mass percentage of N is ≤0.005%, the mass percentage of O is ≤0.010%, the mass percentage of S is ≤0.003%, and the mass percentage of P is ≤ 0.003%.
本发明提供了上述方案所述TC4钛合金埋弧焊剂的制备方法，按以下步骤进行：The present invention provides the preparation method of TC4 titanium alloy submerged arc welding flux described in the above scheme, which is carried out in the following steps:
步骤1：按粉料配比将各原料粉混合干拌3min～5min，然后加入粘合剂继续搅拌4min～6min，得到混合物；Step 1: Mix and dry mix the raw material powders according to the powder ratio for 3 minutes to 5 minutes, then add the binder and continue stirring for 4 minutes to 6 minutes to obtain the mixture;
步骤2：将步骤1得到的混合物先低温烘干，再高温烧结，冷却至室温后过筛，得到TC4钛合金埋弧焊剂。Step 2: drying the mixture obtained in step 1 at low temperature, then sintering at high temperature, cooling to room temperature and then sieving to obtain TC4 titanium alloy submerged arc welding flux.
进一步限定，步骤2中所述低温烘干的参数为：温度为180～230℃，时间为35min～60min。Further defined, the parameters of the low-temperature drying in step 2 are: the temperature is 180-230° C., and the time is 35 minutes-60 minutes.
进一步限定，步骤2中所述高温烧结的参数为：温度为700～900℃，时间为50min～70min。Further defined, the parameters of the high-temperature sintering in step 2 are: the temperature is 700-900° C., and the time is 50 min-70 min.
进一步限定，步骤2中所述过筛的规格为10～80目。It is further defined that the size of the sieve in step 2 is 10-80 mesh.
本发明提供了上述方案所述TC4钛合金埋弧焊剂用于TC4钛合金埋弧焊接的应用。The present invention provides the application of the TC4 titanium alloy submerged arc welding flux described in the above scheme for TC4 titanium alloy submerged arc welding.
进一步限定，所述TC4钛合金埋弧焊剂与TC4钛合金埋弧焊丝配合使用。It is further defined that the TC4 titanium alloy submerged arc welding flux is used in conjunction with the TC4 titanium alloy submerged arc welding wire.
进一步限定，TC4钛合金埋弧焊剂与TC4钛合金埋弧焊丝配合使用进行TC4钛合金埋弧焊接后的焊缝熔敷金属化学成分及其含量为：C：≤0.04wt％，Al：5.20wt％～5.45wt％，V：4.20wt％～4.80wt％，Fe：0.10wt％～0.20wt％，Li：0.15wt％～0.20wt％，Mn：≤0.015wt％，P≤0.01wt％，S≤0.02wt％，N：≤0.02wt％，余量为Ti。Further limit, TC4 titanium alloy submerged arc welding flux and TC4 titanium alloy submerged arc welding wire are used together to carry out the chemical composition and content of weld deposit metal after TC4 titanium alloy submerged arc welding: C: ≤ 0.04wt%, Al: 5.20wt %～5.45wt%, V: 4.20wt%～4.80wt%, Fe: 0.10wt%～0.20wt%, Li: 0.15wt%～0.20wt%, Mn: ≤0.015wt%, P≤0.01wt%, S ≤0.02wt%, N: ≤0.02wt%, the balance is Ti.
本发明相比于现有技术的优点：Advantages of the present invention compared to prior art:
钛合金埋弧焊焊接接头的组织及性能调控的主要核心手段就是通过埋弧焊丝和焊剂的成分改变，从而对显微组织进行调控，实现对焊接接头 的力学性能进行优化。本发明提出一种TC4钛合金埋弧焊剂，对焊接过程的元素烧损进行补充，对焊缝进行有益元素添加，采用埋弧焊接技术进行厚壁钛合金构件的高效优质焊接，实现对焊接接头组织性能的调控，最终获得优质的焊接接头。本发明科学调配了焊剂各组分的比例，优化了熔渣的黏度、表面张力和流动性。在搭配TC4钛合金埋弧焊丝施焊时，焊接过程中的电弧稳定、烟尘少、易脱渣、焊缝成形美观，具有良好的焊接工艺性能和力学性能。具体优点如下：The main core means of regulating the structure and properties of titanium alloy submerged arc welding joints is to adjust the microstructure by changing the composition of submerged arc welding wire and flux, so as to optimize the mechanical properties of welded joints. The invention proposes a TC4 titanium alloy submerged arc flux, which supplements the burning loss of elements in the welding process, adds beneficial elements to the weld seam, uses submerged arc welding technology to perform high-efficiency and high-quality welding of thick-walled titanium alloy components, and realizes welding joints The control of tissue performance finally obtains high-quality welded joints. The invention scientifically adjusts the proportions of components of the flux, and optimizes the viscosity, surface tension and fluidity of molten slag. When welding with TC4 titanium alloy submerged arc welding wire, the arc is stable during the welding process, the smoke is less, the slag is easy to remove, the weld shape is beautiful, and it has good welding process performance and mechanical properties. The specific advantages are as follows:
1)本发明中CaF 2主要用于抑制H、O、N等有害元素向焊缝过渡，控制焊缝中S、P含量，有利于降低焊剂熔点，保证焊缝金属的纯净度及焊剂工艺性能；同时CaF 2还可以增加熔渣透气性，降低熔渣的黏度，使脱渣性能更好；此外，CaF 2还具有提高电导率的作用，产生的高电阻热可以提高熔渣形成速度，保证了熔渣的流动性，及时对焊缝熔池进行隔绝保护；但过多的CaF 2会使电导率过高、熔渣粘度降低，影响熔渣形成过程的稳定，从而影响焊缝成形。 1) In the present invention, CaF2 is mainly used to suppress the transition of harmful elements such as H, O, N to the weld, control the content of S and P in the weld, which is beneficial to reduce the melting point of the flux, and ensure the purity of the weld metal and the process performance of the flux ; At the same time, CaF 2 can also increase the gas permeability of slag, reduce the viscosity of slag, and make the slag removal performance better; The fluidity of the slag is improved, and the weld pool is isolated and protected in time; but too much CaF 2 will cause the electrical conductivity to be too high and the viscosity of the slag to decrease, which will affect the stability of the slag formation process, thereby affecting the weld formation.
2)在焊剂中加入BaCl 2生成的焊接熔渣可以均匀地覆盖在焊缝金属表面，降低焊缝金属的冷却速度，控制α'马氏体含量，并获得良好的焊缝成形。合适含量的BaCl 2可以保证熔渣具有合适的熔点和密度，并可以除去焊缝中的硫、磷等有害杂质，保证焊缝的纯净性，从而保证焊缝的冲击韧性。此外，BaCl 2相比于BaF 2具有更低的熔点，在焊接过程中可以降低焊接热输入，从而可以保证焊缝组织的细化。同时，BaCl 2的加入显著降低焊缝中的O和N的含量，从而保证了焊缝的冲击韧性。 2) The welding slag generated by adding BaCl 2 to the flux can evenly cover the surface of the weld metal, reduce the cooling rate of the weld metal, control the content of α' martensite, and obtain good weld formation. An appropriate content of BaCl2 can ensure that the slag has an appropriate melting point and density, and can remove harmful impurities such as sulfur and phosphorus in the weld to ensure the purity of the weld, thereby ensuring the impact toughness of the weld. In addition, BaCl 2 has a lower melting point than BaF 2 , which can reduce the welding heat input during the welding process, thereby ensuring the refinement of the weld microstructure. At the same time, the addition of BaCl2 significantly reduces the content of O and N in the weld, thus ensuring the impact toughness of the weld.
3)在焊剂中加入LiF同样可以降低焊剂的熔点，提高焊剂工艺性能；另外，通过严格把控焊剂中金属Li的含量可以显著提高焊缝金属中β相的转变温度，细化残余β相，从而可以提高焊缝金属的塑韧性。3) Adding LiF to the flux can also reduce the melting point of the flux and improve the process performance of the flux; in addition, by strictly controlling the content of metal Li in the flux, the transformation temperature of the β phase in the weld metal can be significantly increased, and the residual β phase can be refined. Thereby, the ductility and toughness of the weld metal can be improved.
4)在焊剂中加入NaF和LiF可以与焊缝中H结合成HF气体溢出，有利于降低电弧气氛中H的分压，从而起到去氢作用，减少氢致裂纹的产生。4) Adding NaF and LiF to the flux can combine with H in the weld to form HF gas overflow, which is beneficial to reduce the partial pressure of H in the arc atmosphere, thereby dehydrogenating and reducing the generation of hydrogen-induced cracks.
5)在焊剂中加入适宜含量的高模钾钠水玻璃可以提高电弧稳定性，并增加焊剂碱度。当水玻璃高模钾钠水玻璃的含量大于5％时，焊缝中氢含量有明显增加趋势，因此将焊剂中高模钾钠水玻璃含量质量分数控制在 3％～5％。5) Adding an appropriate amount of high modulus potassium sodium water glass to the flux can improve the arc stability and increase the alkalinity of the flux. When the content of high modulus potassium sodium water glass in water glass is greater than 5%, the hydrogen content in the weld tends to increase significantly, so the mass fraction of high modulus potassium sodium water glass in the flux is controlled at 3% to 5%.
具体实施方式Detailed ways
下面结合实施例和附图对本发明进一步说明。The present invention will be further described below in conjunction with the embodiments and accompanying drawings.
实施例1：Example 1:
本实施例的一种TC4钛合金埋弧焊剂由粘合剂和粉料制备而成，其中粉料按质量分数由BaCl 2：4.5％，LiF：2.0％，NaF：4.9％和余量的CaF 2混合而成，所述粘合剂为高模钾钠水玻璃，模数为2.8～3.1，钾钠比为3:1，所述焊剂中粘合剂的质量分数为4％，所述粉料中H质量百分含量≤0.003％，N质量百分含量≤0.005％，O质量百分含量≤0.010％，S质量百分含量≤0.003％，P质量百分含量≤0.003％。 A kind of TC4 titanium alloy submerged arc welding flux of the present embodiment is prepared from binder and powder, wherein powder is composed of BaCl 2 : 4.5%, LiF: 2.0%, NaF: 4.9% and the CaF of balance 2 mixed, the binder is high modulus potassium sodium water glass, the modulus is 2.8 to 3.1, the potassium-sodium ratio is 3:1, the mass fraction of the binder in the flux is 4%, and the powder The mass percentage content of H in the material is ≤0.003%, the mass percentage content of N is ≤0.005%, the mass percentage content of O is ≤0.010%, the mass percentage content of S is ≤0.003%, and the mass percentage content of P is ≤0.003%.
所述焊剂制备方法按以下步骤进行：Described flux preparation method is carried out as follows:
步骤1：按粉料配比将各原料粉混合干拌4min，然后加入粘合剂继续搅拌5min，得到混合物；Step 1: Mix and dry mix the raw material powders according to the powder ratio for 4 minutes, then add the binder and continue stirring for 5 minutes to obtain the mixture;
步骤2：将步骤1得到的混合物先在200℃下低温烘干45min，再在800℃下高温烧结60min，冷却至室温后过80目筛，得到TC4钛合金埋弧焊剂。Step 2: Dry the mixture obtained in step 1 at low temperature at 200°C for 45 minutes, then sinter at 800°C for 60 minutes at high temperature, cool to room temperature and pass through an 80-mesh sieve to obtain TC4 titanium alloy submerged arc welding flux.
实施例2：Example 2:
本实施例的一种TC4钛合金埋弧焊剂由粘合剂和粉料制备而成，其中粉料按质量分数由BaCl 2：5％，LiF：2.1％，NaF：5.1％和余量的CaF 2混合而成，所述粘合剂为高模钾钠水玻璃，模数为2.8～3.1，钾钠比为3:1，所述焊剂中粘合剂的质量分数为4％，所述粉料中H质量百分含量≤0.003％，N质量百分含量≤0.005％，O质量百分含量≤0.010％，S质量百分含量≤0.003％，P质量百分含量≤0.003％。 A kind of TC4 titanium alloy submerged arc welding flux of the present embodiment is prepared from binder and powder, wherein the powder consists of BaCl 2 : 5%, LiF: 2.1%, NaF: 5.1% and the CaF of the balance 2 mixed, the binder is high modulus potassium sodium water glass, the modulus is 2.8 to 3.1, the potassium-sodium ratio is 3:1, the mass fraction of the binder in the flux is 4%, and the powder The mass percentage content of H in the material is ≤0.003%, the mass percentage content of N is ≤0.005%, the mass percentage content of O is ≤0.010%, the mass percentage content of S is ≤0.003%, and the mass percentage content of P is ≤0.003%.
所述焊剂制备方法按以下步骤进行：Described flux preparation method is carried out as follows:
步骤1：按粉料配比将各原料粉混合干拌4min，然后加入粘合剂继续搅拌5min，得到混合物；Step 1: Mix and dry mix the raw material powders according to the powder ratio for 4 minutes, then add the binder and continue stirring for 5 minutes to obtain the mixture;
步骤2：将步骤1得到的混合物先在200℃下低温烘干45min，再在800℃下高温烧结60min，冷却至室温后过80目筛，得到TC4钛合金埋弧焊剂。Step 2: Dry the mixture obtained in step 1 at low temperature at 200°C for 45 minutes, then sinter at 800°C for 60 minutes at high temperature, cool to room temperature and pass through an 80-mesh sieve to obtain TC4 titanium alloy submerged arc welding flux.
应用例1：Application example 1:
将实施例1～2的TC4钛合金埋弧焊剂用于TC4钛合金埋弧焊接，具体过程如下：The TC4 titanium alloy submerged arc welding flux of Embodiment 1～2 is used for TC4 titanium alloy submerged arc welding, and the specific process is as follows:
将实施例1～2的TC4钛合金埋弧焊剂与直径为4.0mm的TC4钛合金埋弧焊丝配合使用进行多道多层埋弧焊接，母材为TC4钛合金板，规格为300mm×200mm×30mm，加工V形坡口，单边坡口角度为30°，坡口钝边为5mm，坡口根部间隙为10mm，共计焊接12道完成试板焊接，层间温度控制在100℃以内，采用交流焊接电源，表1为焊接工艺参数，表2为焊缝熔敷金属化学组成结果，表3为焊接接头力学性能测试结果。The TC4 titanium alloy submerged arc welding flux of Examples 1-2 is used in conjunction with the TC4 titanium alloy submerged arc welding wire with a diameter of 4.0mm for multi-layer multilayer submerged arc welding. The base material is a TC4 titanium alloy plate with a specification of 300mm×200mm× 30mm, process V-shaped groove, single-side groove angle is 30°, groove blunt edge is 5mm, groove root gap is 10mm, a total of 12 weldings are completed to complete the test plate welding, and the interlayer temperature is controlled within 100°C. AC welding power supply, Table 1 is the welding process parameters, Table 2 is the chemical composition of the weld deposited metal, and Table 3 is the test results of the mechanical properties of the welded joint.
表1 焊接工艺参数Table 1 Welding process parameters
Figure PCTCN2022109612-appb-000001
Figure PCTCN2022109612-appb-000001
表2 焊缝熔敷金属化学组成结果Table 2 Results of chemical composition of weld deposited metal
Figure PCTCN2022109612-appb-000002
Figure PCTCN2022109612-appb-000002
表3 力学性能试验结果Table 3 Mechanical property test results
Figure PCTCN2022109612-appb-000003
Figure PCTCN2022109612-appb-000003
以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发 明权利要求的保护范围内。对这些实施例的多种修改对本领域的专业技术人员来说是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。The descriptions of the above embodiments are only used to help understand the method and core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can also be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (16)

  1. 一种TC4钛合金埋弧焊剂，其特征在于，由粘合剂和粉料制备而成，所述粉料按质量分数由BaCl 2：4.5％～5.5％，LiF：1.8％～2.1％，NaF：4.8％～5.1％和余量的CaF 2混合而成。 A TC4 titanium alloy submerged arc welding flux is characterized in that it is prepared from a binder and powder, and the powder consists of BaCl 2 : 4.5% to 5.5%, LiF: 1.8% to 2.1%, NaF : 4.8% ~ 5.1% and the balance of CaF 2 mixed.
  2. 根据权利要求1所述的TC4钛合金埋弧焊剂，其特征在于，所述粘合剂为高模钾钠水玻璃，模数为2.8～3.1，钾钠比为3:1。The TC4 titanium alloy submerged arc welding flux according to claim 1, wherein the binder is high modulus potassium sodium water glass, the modulus is 2.8-3.1, and the potassium-sodium ratio is 3:1.
  3. 根据权利要求1或2所述的TC4钛合金埋弧焊剂，其特征在于，所述焊剂中粘合剂的质量分数为3％～5％。The TC4 titanium alloy submerged arc welding flux according to claim 1 or 2, characterized in that the mass fraction of the binder in the flux is 3% to 5%.
  4. 根据权利要求1所述的TC4钛合金埋弧焊剂，其特征在于，所述粉料按质量分数由BaCl 2：5％，LiF：2％，NaF：5％和余量的CaF 2混合而成。 The TC4 titanium alloy submerged arc welding flux according to claim 1, wherein the powder is mixed by mass fraction of BaCl 2 : 5%, LiF: 2%, NaF: 5% and the remainder of CaF 2 .
  5. 根据权利要求1所述的TC4钛合金埋弧焊剂，其特征在于，所述粉料按质量分数由BaCl 2：4.5％，LiF：2.0％，NaF：4.9％和余量的CaF 2混合而成。 The TC4 titanium alloy submerged arc welding flux according to claim 1, wherein the powder is mixed by mass fraction of BaCl 2 : 4.5%, LiF: 2.0%, NaF: 4.9% and the remainder of CaF 2 .
  6. 根据权利要求1所述的TC4钛合金埋弧焊剂，其特征在于，所述粉料按质量分数由BaCl 2：5％，LiF：2.1％，NaF：5.1％和余量的CaF 2混合而成。 The TC4 titanium alloy submerged arc welding flux according to claim 1, wherein the powder is mixed by mass fraction of BaCl 2 : 5%, LiF: 2.1%, NaF: 5.1% and the remainder of CaF 2 .
  7. 根据权利要求1和4～6任一项所述的TC4钛合金埋弧焊剂，其特征在于，所述粉料中H质量百分含量≤0.003％，N质量百分含量≤0.005％，O质量百分含量≤0.010％，S质量百分含量≤0.003％，P质量百分含量≤0.003％。According to the TC4 titanium alloy submerged arc welding flux described in any one of claims 1 and 4 to 6, it is characterized in that, in the powder, H mass percentage content≤0.003%, N mass percentage content≤0.005%, O mass percentage content The percentage content is ≤0.010%, the S mass percentage content is ≤0.003%, and the P mass percentage content is ≤0.003%.
  8. 权利要求1～7任意一项所述TC4钛合金埋弧焊剂的制备方法，其特征在于，按以下步骤进行：The preparation method of TC4 titanium alloy submerged arc welding flux described in any one of claims 1 to 7 is characterized in that, it is carried out according to the following steps:
    步骤1：按粉料配比将各原料粉混合干拌3min～5min，然后加入粘合剂继续搅拌4min～6min，得到混合物；Step 1: Mix and dry mix the raw material powders according to the powder ratio for 3 minutes to 5 minutes, then add the binder and continue stirring for 4 minutes to 6 minutes to obtain the mixture;
    步骤2：将步骤1得到的混合物先低温烘干，再高温烧结，冷却至室温后过筛，得到TC4钛合金埋弧焊剂。Step 2: drying the mixture obtained in step 1 at low temperature, then sintering at high temperature, cooling to room temperature and then sieving to obtain TC4 titanium alloy submerged arc welding flux.
  9. 根据权利要求8所述的制备方法，其特征在于，步骤2中所述低温烘干的参数为：温度为180～230℃，时间为35min～60min。The preparation method according to claim 8, characterized in that the parameters of the low-temperature drying in step 2 are: the temperature is 180-230° C., and the time is 35 minutes-60 minutes.
  10. 根据权利要求8所述的制备方法，其特征在于，步骤2中所述高温烧结的参数为：温度为700～900℃，时间为50min～70min。The preparation method according to claim 8, characterized in that the parameters of the high-temperature sintering in step 2 are: the temperature is 700-900°C, and the time is 50min-70min.
  11. 根据权利要求8所述的制备方法，其特征在于，步骤2中所述过筛的规格为10～80目。The preparation method according to claim 8, characterized in that the specification of sieving in step 2 is 10-80 mesh.
  12. 权利要求1～7任意一项所述TC4钛合金埋弧焊剂或权利要求8～11任一项所述制备方法制备得到的TC4钛合金埋弧焊剂的应用，其特征在于，所述焊剂用于TC4钛合金埋弧焊接。The application of the TC4 titanium alloy submerged arc welding flux described in any one of claims 1 to 7 or the TC4 titanium alloy submerged arc welding flux prepared by the preparation method described in any one of claims 8 to 11, is characterized in that the flux is used for TC4 titanium alloy submerged arc welding.
  13. 根据权利要求12所述的应用，其特征在于，所述TC4钛合金埋弧焊剂与TC4钛合金埋弧焊丝配合使用。The application according to claim 12, characterized in that the TC4 titanium alloy submerged arc welding flux is used in conjunction with the TC4 titanium alloy submerged arc welding wire.
  14. 根据权利要求12所述的应用，其特征在于，所述TC4钛合金埋弧焊剂与TC4钛合金埋弧焊丝配合使用进行TC4钛合金埋弧焊接后的焊缝熔敷金属化学成分及其含量为：C：≤0.04wt％，Al：5.20wt％～5.45wt％，V：4.20wt％～4.80wt％，Fe：0.10wt％～0.20wt％，Li：0.15wt％～0.20wt％，Mn：≤0.015wt％，P≤0.01wt％，S≤0.02wt％，N：≤0.02wt％，余量为Ti。The application according to claim 12, characterized in that, the TC4 titanium alloy submerged arc welding flux is used in conjunction with the TC4 titanium alloy submerged arc welding wire to carry out the chemical composition and content of the weld deposit metal after TC4 titanium alloy submerged arc welding is as follows: : C: ≤0.04wt%, Al: 5.20wt%~5.45wt%, V: 4.20wt%~4.80wt%, Fe: 0.10wt%~0.20wt%, Li: 0.15wt%~0.20wt%, Mn: ≤0.015wt%, P≤0.01wt%, S≤0.02wt%, N: ≤0.02wt%, the balance being Ti.
  15. 根据权利要求12所述的应用，其特征在于，所述TC4钛合金埋弧焊接为多道多层埋弧焊接。The application according to claim 12, characterized in that the TC4 titanium alloy submerged arc welding is multi-pass multilayer submerged arc welding.
  16. 根据权利要求12所述的应用，其特征在于，所述TC4钛合金的壁厚为30mm。The application according to claim 12, characterized in that the wall thickness of the TC4 titanium alloy is 30mm.
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