CN115805389A - Gas protection solid welding wire suitable for being matched with sulfuric acid dew point corrosion resistant pipeline - Google Patents
Gas protection solid welding wire suitable for being matched with sulfuric acid dew point corrosion resistant pipeline Download PDFInfo
- Publication number
- CN115805389A CN115805389A CN202211663009.1A CN202211663009A CN115805389A CN 115805389 A CN115805389 A CN 115805389A CN 202211663009 A CN202211663009 A CN 202211663009A CN 115805389 A CN115805389 A CN 115805389A
- Authority
- CN
- China
- Prior art keywords
- welding wire
- sulfuric acid
- weight percent
- dew point
- acid dew
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Nonmetallic Welding Materials (AREA)
- Arc Welding In General (AREA)
Abstract
Description
技术领域technical field
本发明属于焊丝加工领域,尤其是涉及一种适用于耐硫酸露点腐蚀管道配套用气保护实心焊丝。The invention belongs to the field of welding wire processing, and in particular relates to a gas-shielded solid welding wire suitable for supporting pipelines resistant to sulfuric acid dew point corrosion.
背景技术Background technique
在冶金、电力、石化等工业领域,以重油或燃煤作为主要工业燃料的烟气处理系统,如锅炉低温部位的空气预热器、热交换器、省煤器、烟道、烟囱以及脱硫装置等,普遍会遇到燃料中含硫量偏高,在燃烧以后会生成SO2,其中一部分还会再生成SO3。SO2在达到露点温度时与水蒸气结合生成H2SO4,由稀变浓,造成设备的腐蚀,这种现象称之为“硫酸露点腐蚀”。与普通的大气腐蚀现象不同,其不仅腐蚀普通碳钢,而且能够腐蚀不锈钢等,对工业生产装置的危害极大。In metallurgy, electric power, petrochemical and other industrial fields, flue gas treatment systems that use heavy oil or coal as the main industrial fuel, such as air preheaters, heat exchangers, economizers, flues, chimneys and desulfurization devices in low-temperature parts of boilers etc. It is generally encountered that the sulfur content in the fuel is high, and SO 2 will be generated after combustion, and part of it will be regenerated into SO 3 . When SO 2 reaches the dew point temperature, it combines with water vapor to form H 2 SO 4 , which changes from dilute to concentrated, causing corrosion of equipment. This phenomenon is called "sulfuric acid dew point corrosion". Different from ordinary atmospheric corrosion phenomena, it not only corrodes ordinary carbon steel, but also can corrode stainless steel, etc., which is extremely harmful to industrial production equipment.
为了解决设备的硫酸腐蚀问题,技术人员提出了多种方法,如燃料或烟气脱硫、提高受热面壁温、使用耐硫酸腐蚀材料等,但都是各有利弊。经过长时间的不断试验研究和生产实践,从控制成本、简化工艺、节约能源等角度来看,采用耐硫酸腐蚀材料成效最好。耐硫酸露点腐蚀钢以其低成本、耐酸性优良等特性,在省煤器、烟道及废气脱硫设备中得到广泛应用,并取得良好的实际效果。而目前与耐硫酸露点腐蚀钢相匹配的焊接材料均为常规焊材,焊缝处并不具备耐酸性等特点,造成焊缝处极易出现腐蚀现象,大大降低工业生产装置的使用年限。所以亟需开发适用于耐硫酸露点腐蚀管道焊接材料。In order to solve the problem of sulfuric acid corrosion of equipment, technicians have proposed a variety of methods, such as fuel or flue gas desulfurization, increasing the temperature of the heating surface wall, using sulfuric acid corrosion resistant materials, etc., but each has its own advantages and disadvantages. After a long period of continuous experimental research and production practice, from the perspective of cost control, process simplification, and energy saving, the use of sulfuric acid corrosion-resistant materials has the best effect. Sulfuric acid dew point corrosion resistant steel has been widely used in economizers, flue and exhaust gas desulfurization equipment due to its low cost and excellent acid resistance, and has achieved good practical results. At present, the welding consumables that match the sulfuric acid dew point corrosion-resistant steel are all conventional welding consumables, and the welds do not have the characteristics of acid resistance, which makes the welds prone to corrosion and greatly reduces the service life of industrial production equipment. Therefore, it is urgent to develop welding materials suitable for sulfuric acid dew point corrosion resistant pipelines.
相较于电焊条和药芯焊丝,气保护实心焊丝具备操作工艺性能好,焊缝成形美观、焊工容易操作等优势,同时气保护实心焊丝制备工艺相对简单。Compared with welding rods and flux-cored wires, gas-shielded solid wires have the advantages of good operational performance, beautiful weld shape, and easy operation by welders. At the same time, the preparation process of gas-shielded solid wires is relatively simple.
由于其严苛的服役环境,耐硫酸腐蚀焊接材料在要求耐酸性的同时,焊缝金属需要满足耐热耐高温等要求。而且为了减轻自重并承担高压,一般都采用低合金高强钢,因此焊材的设计也应满足低合金高强高韧性的要求。Due to its harsh service environment, while the sulfuric acid corrosion-resistant welding material requires acid resistance, the weld metal needs to meet the requirements of heat resistance and high temperature resistance. Moreover, in order to reduce the self-weight and withstand high pressure, low-alloy high-strength steel is generally used, so the design of welding materials should also meet the requirements of low-alloy high-strength and high-toughness.
发明内容Contents of the invention
有鉴于此,本发明旨在提出一种适用于耐硫酸露点腐蚀管道配套用气保护实心焊丝。In view of this, the present invention aims to propose a gas-shielded solid welding wire suitable for supporting pipelines resistant to sulfuric acid dew point corrosion.
为达到上述目的,本发明的技术方案是这样实现的:In order to achieve the above object, technical solution of the present invention is achieved in that way:
一种适用于耐硫酸露点腐蚀管道配套用气保护实心焊丝,该实心焊丝的化学成分按重量百分比计,包括:C 0.07-0.09wt%,Mn1.20-1.60wt%,Si 0.26-0.38wt%,Cr 0.90-1.00wt%,S≤0.025wt%,P≤0.025wt%,Sb 0.07-0.09wt%,Cu 0.25-0.35wt%,余量为Fe以及不可避免的杂质,各组分的质量分数之和为100%。A gas-shielded solid welding wire suitable for supporting pipelines resistant to sulfuric acid dew point corrosion. The chemical composition of the solid welding wire is calculated by weight percentage, including: C 0.07-0.09wt%, Mn1.20-1.60wt%, Si 0.26-0.38wt% , Cr 0.90-1.00wt%, S≤0.025wt%, P≤0.025wt%, Sb 0.07-0.09wt%, Cu 0.25-0.35wt%, the balance is Fe and unavoidable impurities, the mass fraction of each component The sum is 100%.
进一步,所述的S的质量百分比为≤0.008wt%。Further, the mass percentage of S is ≤0.008wt%.
进一步,所述的P的质量百分比为≤0.015wt%。Further, the mass percentage of P is ≤0.015wt%.
进一步,所述的Mn的质量百分比为1.20-1.30wt%。Further, the mass percentage of Mn is 1.20-1.30wt%.
进一步,所述的Cu的质量百分比为0.25-0.30wt%。Further, the mass percentage of Cu is 0.25-0.30wt%.
进一步,所述的焊丝熔覆金属的力学性能如下:屈服强度Rp0.2≥490MPa;抗拉强度Rm≥620MPa;断后伸长率A≥19%,低温冲击韧性为:-20℃焊缝冲击功达47J以上。Further, the mechanical properties of the welding wire cladding metal are as follows: yield strength Rp0.2≥490MPa; tensile strength Rm≥620MPa; elongation after fracture A≥19%, low temperature impact toughness: -20 ° C weld impact energy Up to 47J or more.
一种使用所述的适用于耐硫酸露点腐蚀管道配套用气保护实心焊丝的焊接方法,其特征在于:包括如下步骤:使用体积百分比组成为Ar 70-90%、CO2 10-30%的富Ar混合气体进行焊接,焊接参数为:焊接速度:4-8mm/s,气体流量,15-25L/min,电流:260-300A,电压:27-32V,道温150-180℃。A welding method using the gas-shielded solid welding wire suitable for sulfuric acid dew-point corrosion-resistant pipelines, characterized in that it includes the following steps: using a rich welding wire composed of 70-90% Ar and 10-30% CO 2 by volume. Ar mixed gas is used for welding, welding parameters are: welding speed: 4-8mm/s, gas flow rate: 15-25L/min, current: 260-300A, voltage: 27-32V, channel temperature: 150-180°C.
进一步,所述的富Ar混合气体的体积百分比组成为Ar 80-90%、CO2 10-20%。Further, the volume percent composition of the Ar-rich mixed gas is Ar 80-90%, CO 2 10-20%.
碳元素(C):碳是低合金焊丝钢中的基本元素,它的存在提高了焊缝的强度,但是含碳量过高又影响钢的焊接性能,所以应将钢中碳的含量控制在一个合适的范围内。碳含量的增加会降低焊缝的耐腐蚀能力,露天高碳钢特别容易腐蚀生锈,此外碳含量的增加会相应增加焊缝的冷脆性和时效敏感性。经研究表明,低碳含铜钢的耐蚀性能最优良。Carbon element (C): Carbon is the basic element in low-alloy welding wire steel. Its existence improves the strength of the weld, but too high a carbon content affects the welding performance of the steel, so the carbon content in the steel should be controlled at within an appropriate range. The increase of carbon content will reduce the corrosion resistance of the weld. High carbon steel in the open air is particularly prone to corrosion and rust. In addition, the increase of carbon content will increase the cold brittleness and aging sensitivity of the weld correspondingly. Studies have shown that low-carbon copper-containing steel has the best corrosion resistance.
锰元素(Mn):锰是低合金焊丝钢中的基本组成元素,能适当提高焊缝的强度,改善加工性能,但是锰元素对钢的耐蚀性有不利影响。所以锰元素必须综合考虑耐蚀性和固氮性能的双重作用。Manganese element (Mn): Manganese is a basic constituent element in low-alloy welding wire steel, which can properly increase the strength of the weld and improve processing performance, but manganese element has an adverse effect on the corrosion resistance of steel. Therefore, manganese must take into account the dual effects of corrosion resistance and nitrogen fixation performance.
硅元素(Si):硅也是低合金焊丝钢中的基本元素,当硅和铜共存时,能适当提高焊缝的耐蚀性,但是,焊丝钢中含硅量过高,会使钢的加工性能变差。Silicon (Si): Silicon is also a basic element in low-alloy welding wire steel. When silicon and copper coexist, it can properly improve the corrosion resistance of the weld. However, if the silicon content in welding wire steel is too high, the processing of the steel will Performance deteriorates.
铬元素(Cr):铬元素的加入,既能提高焊缝的热强性能和高温抗氧化性能,同时也能提高焊缝的耐蚀性。铬的电位较低,具有钝化作用的倾向,从而起到提高耐蚀性能的作用,而且铬在铜的配合下耐蚀效果更明显。铬元素在熔池中会与碳元素结合,所以铬的耐蚀性会随着碳元素的增加而降低,必须合理控制焊丝中的碳元素和铬元素的含量比值才能更好的发挥铬元素的耐蚀性能。Chromium (Cr): The addition of chromium can not only improve the thermal strength and high temperature oxidation resistance of the weld, but also improve the corrosion resistance of the weld. The potential of chromium is low, and it has a tendency of passivation, so as to improve the corrosion resistance, and the corrosion resistance effect of chromium is more obvious under the cooperation of copper. Chromium will combine with carbon in the molten pool, so the corrosion resistance of chromium will decrease with the increase of carbon. The ratio of carbon to chromium in the welding wire must be reasonably controlled to better play the role of chromium. Corrosion resistance.
锑元素(Sb):锑元素的添加对提高焊缝的耐硫酸腐蚀能力和耐磨性有较大的帮助,锑能抑制阳极反应,同时在焊缝表面形成Cu2Sb薄膜也可以抑制阴极反应。但是锑含量偏高会降低焊缝强度,增加脆性。Antimony element (Sb): The addition of antimony element is of great help to improve the sulfuric acid corrosion resistance and wear resistance of the weld. Antimony can inhibit the anode reaction, and the formation of Cu 2 Sb film on the surface of the weld can also inhibit the cathode reaction . However, high antimony content will reduce the weld strength and increase brittleness.
铜元素(Cu):铜元素在焊缝中起到强化铁素体的作用,同时对提高焊缝的耐蚀性具有重要作用。铜在焊缝的腐蚀过程中起到活泼阴极的作用,一定条件下可以促使焊缝产生阳极钝化,从而降低焊缝的腐蚀速度;同时,铜易与钢中的硫结合,在焊缝的表面形成Cu2S钝化膜,从而抑制了阳极反应和阴极的电化学反应,缓解了硫酸露点腐蚀。铜元素含量超过0.50%时会极大的降低焊缝的塑性,影响焊缝的热加工性能。Copper element (Cu): Copper element plays a role in strengthening ferrite in the weld, and at the same time plays an important role in improving the corrosion resistance of the weld. Copper plays the role of an active cathode in the corrosion process of the weld. Under certain conditions, it can promote the anode passivation of the weld, thereby reducing the corrosion rate of the weld. At the same time, copper is easy to combine with sulfur in the steel, and the A Cu 2 S passivation film is formed on the surface, thereby inhibiting the anode reaction and the cathode electrochemical reaction, and alleviating sulfuric acid dew point corrosion. When the content of copper element exceeds 0.50%, the plasticity of the weld will be greatly reduced, and the hot workability of the weld will be affected.
磷(P):磷即使含量很低时,裂纹也能在MnS上形核,但尺寸很小,不能被检测出。但如磷含量高,则即使S很低(S=0.001%),裂纹也能在氧化物夹杂以及晶界上形核并扩展。同时P还属于易偏析元素,造成焊缝的冷脆,并促进其它有害残余元素的晶界偏聚,进一步恶化焊缝的质量,因此要求焊丝中的P越低越好。Phosphorus (P): Even when the content of phosphorus is very low, cracks can nucleate on MnS, but the size is too small to be detected. However, if the phosphorus content is high, even if S is very low (S=0.001%), cracks can nucleate and propagate on oxide inclusions and grain boundaries. At the same time, P is also an element that is easy to segregate, causing cold and brittle welds, and promoting the grain boundary segregation of other harmful residual elements, further deteriorating the quality of welds, so the lower the P in the welding wire, the better.
硫(S):对耐硫酸露点腐蚀而言,一定量的硫存在,可以促使焊缝表面形成Cu2S钝化膜,从而抑制阳极反应和阴极的电化学反应。但当S、Cu、Sb同时出现在钢中时容易在晶界产生低熔点共存体,严重破坏焊缝的综合性能,并形成硫化物夹杂的腐蚀源点,因此需严格控制S含量。Sulfur (S): For resistance to sulfuric acid dew point corrosion, the presence of a certain amount of sulfur can promote the formation of Cu 2 S passivation film on the surface of the weld, thereby inhibiting the anode reaction and cathode electrochemical reaction. However, when S, Cu, and Sb appear in the steel at the same time, it is easy to produce low-melting point coexistence at the grain boundary, seriously destroying the comprehensive performance of the weld, and forming a corrosion source of sulfide inclusions, so the S content must be strictly controlled.
相对于现有技术,本发明具有以下优势:Compared with the prior art, the present invention has the following advantages:
本发明所述的适用于耐硫酸露点腐蚀管道配套用气保护实心焊丝,具有以下优势:The gas-protected solid welding wire suitable for supporting sulfuric acid dew point corrosion-resistant pipelines described in the present invention has the following advantages:
与传统的焊丝进行对比发现,本发明的所述的适用于耐硫酸露点腐蚀管道配套用气保护实心焊丝具备耐酸、耐高温的特点,同时具有高强、高韧的性能。该焊丝通过加入适量的Cr、Cu和Sb等元素,提高了焊缝的耐蚀性能;通过控制适当的Mn、Si、P和S等元素,保证了焊缝良好的力学性能。Compared with the traditional welding wire, it is found that the gas-shielded solid welding wire suitable for sulfuric acid dew point corrosion-resistant pipelines of the present invention has the characteristics of acid resistance and high temperature resistance, as well as high strength and high toughness. The welding wire improves the corrosion resistance of the weld by adding an appropriate amount of elements such as Cr, Cu and Sb; by controlling the appropriate elements such as Mn, Si, P and S, the good mechanical properties of the weld are guaranteed.
具体实施方式Detailed ways
除有定义外,以下实施例中所用的技术术语具有与本发明所属领域技术人员普遍理解的相同含义。以下实施例中所用的试验试剂,如无特殊说明,均为常规生化试剂;所述实验方法,如无特殊说明,均为常规方法。Unless otherwise defined, the technical terms used in the following embodiments have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. The test reagents used in the following examples, unless otherwise specified, are conventional biochemical reagents; the experimental methods, unless otherwise specified, are conventional methods.
下面结合实施例来详细说明本发明。The present invention will be described in detail below in conjunction with examples.
实施例1Example 1
一种适用于耐硫酸露点腐蚀管道配套用气保护实心焊丝,该实心焊丝的化学成分按重量百分比计,包括:C:0.078wt.%,Mn:1.25wt.%,Si:0.30wt.%,Cr:0.91wt.%,S:0.008wt.%,P:0.015wt.%,Sb:0.075wt.%,Cu:0.26wt.%,不可能避免杂质元素总和≤0.30wt.%,余量为Fe;各组分的质量百分比之和为100%。A gas-shielded solid welding wire suitable for supporting pipelines resistant to sulfuric acid dew point corrosion. The chemical composition of the solid welding wire is calculated by weight percentage, including: C: 0.078wt.%, Mn: 1.25wt.%, Si: 0.30wt.%, Cr: 0.91wt.%, S: 0.008wt.%, P: 0.015wt.%, Sb: 0.075wt.%, Cu: 0.26wt.%, it is impossible to avoid the sum of impurity elements ≤ 0.30wt.%, the balance is Fe; the sum of the mass percentages of each component is 100%.
对得到的焊丝进行熔敷金属性能实验:屈服强度Rp0.2为545MPa;抗拉强度Rm为652MPa;断后伸长率A为19.5%;低温冲击韧性为:-20℃焊缝冲击功为58.3J;将试样浸入温度为(70±2)℃的50%硫酸溶液中进行24小时腐蚀浸泡试验,试样的平均腐蚀率为34.81g/m2.h。The deposited metal performance test was carried out on the obtained welding wire: the yield strength R p0.2 was 545MPa; the tensile strength R m was 652MPa; the elongation A after fracture was 19.5%; 58.3J; the sample was immersed in a 50% sulfuric acid solution at (70±2)°C for 24 hours of corrosion immersion test, and the average corrosion rate of the sample was 34.81g/m 2 .h.
实施例2Example 2
一种适用于耐硫酸露点腐蚀管道配套用气保护实心焊丝,该实心焊丝的化学成分按重量百分比计,包括:C:0.082wt.%,Mn:1.21wt.%,Si:0.35wt.%,Cr:0.95wt.%,S:0.007wt.%,P:0.015wt.%,Sb:0.078wt.%,Cu:0.28wt.%,不可能避免杂质元素总和≤0.30wt.%,余量为Fe;各组分的质量百分比之和为100%。A gas-shielded solid welding wire suitable for supporting pipelines resistant to sulfuric acid dew point corrosion. The chemical composition of the solid welding wire is calculated by weight percentage, including: C: 0.082wt.%, Mn: 1.21wt.%, Si: 0.35wt.%, Cr: 0.95wt.%, S: 0.007wt.%, P: 0.015wt.%, Sb: 0.078wt.%, Cu: 0.28wt.%, it is impossible to avoid the sum of impurity elements ≤ 0.30wt.%, the balance is Fe; the sum of the mass percentages of each component is 100%.
对得到的焊丝进行熔敷金属性能实验:屈服强度Rp0.2为532MPa;抗拉强度Rm为676MPa;断后伸长率A为19.0%;低温冲击韧性为:-20℃焊缝冲击功为52.6J;将试样浸入温度为(70±2)℃的50%硫酸溶液中进行24小时腐蚀浸泡试验,试样的平均腐蚀率为34.23g/m2.h。The deposited metal performance test was carried out on the obtained welding wire: the yield strength R p0.2 was 532MPa; the tensile strength R m was 676MPa; the elongation A after fracture was 19.0%; the low-temperature impact toughness was: 52.6J; the sample was immersed in a 50% sulfuric acid solution at a temperature of (70±2)°C for a 24-hour corrosion immersion test, and the average corrosion rate of the sample was 34.23g/m 2 .h.
实施例3Example 3
一种适用于耐硫酸露点腐蚀管道配套用气保护实心焊丝,该实心焊丝的化学成分按重量百分比计,包括:C:0.071wt.%,Mn:1.21wt.%,Si:0.32wt.%,Cr:0.94wt.%,S:0.006wt.%,P:0.014wt.%,Sb:0.078wt.%,Cu:0.25wt.%,不可能避免杂质元素总和≤0.30wt.%,余量为Fe;各组分的质量百分比之和为100%。A gas-shielded solid welding wire suitable for supporting pipelines resistant to sulfuric acid dew point corrosion. The chemical composition of the solid welding wire is calculated by weight percentage, including: C: 0.071wt.%, Mn: 1.21wt.%, Si: 0.32wt.%, Cr: 0.94wt.%, S: 0.006wt.%, P: 0.014wt.%, Sb: 0.078wt.%, Cu: 0.25wt.%, it is impossible to avoid the sum of impurity elements ≤ 0.30wt.%, the balance is Fe; the sum of the mass percentages of each component is 100%.
对得到的焊丝进行熔敷金属性能实验:屈服强度Rp0.2为508MPa;抗拉强度Rm为625MPa;断后伸长率A为21.0%;低温冲击韧性为:-20℃焊缝冲击功为72J;将试样浸入温度为(70±2)℃的50%硫酸溶液中进行24小时腐蚀浸泡试验,试样的平均腐蚀率为33.12g/m2.h。The deposited metal performance test was carried out on the obtained welding wire: the yield strength R p0.2 was 508MPa; the tensile strength R m was 625MPa; the elongation A after fracture was 21.0%; 72J; the sample was immersed in a 50% sulfuric acid solution at a temperature of (70±2)°C for a 24-hour corrosion immersion test, and the average corrosion rate of the sample was 33.12g/m 2 .h.
实施例4Example 4
一种适用于耐硫酸露点腐蚀管道配套用气保护实心焊丝,该实心焊丝的化学成分按重量百分比计,包括:C:0.082wt.%,Mn:1.30wt.%,Si:0.32wt.%,Cr:0.92wt.%,S:0.008wt.%,P:0.014wt.%,Sb:0.081wt.%,Cu:0.25wt.%,不可能避免杂质元素总和≤0.30wt.%,余量为Fe;各组分的质量百分比之和为100%。A gas-shielded solid welding wire suitable for supporting pipelines resistant to sulfuric acid dew point corrosion. The chemical composition of the solid welding wire is calculated by weight percentage, including: C: 0.082wt.%, Mn: 1.30wt.%, Si: 0.32wt.%, Cr: 0.92wt.%, S: 0.008wt.%, P: 0.014wt.%, Sb: 0.081wt.%, Cu: 0.25wt.%, it is impossible to avoid the sum of impurity elements ≤ 0.30wt.%, the balance is Fe; the sum of the mass percentages of each component is 100%.
对得到的焊丝进行熔敷金属性能实验:屈服强度Rp0.2为523MPa;抗拉强度Rm为686MPa;断后伸长率A为19.0%;低温冲击韧性为:-20℃焊缝冲击功为61.5J;将试样浸入温度为(70±2)℃的50%硫酸溶液中进行24小时腐蚀浸泡试验,试样的平均腐蚀率为32.51g/m2.h。The deposited metal performance test was carried out on the obtained welding wire: the yield strength R p0.2 was 523MPa; the tensile strength R m was 686MPa; the elongation A after fracture was 19.0%; the impact toughness at low temperature was: 61.5J; The sample was immersed in a 50% sulfuric acid solution at a temperature of (70±2)°C for a 24-hour corrosion immersion test, and the average corrosion rate of the sample was 32.51g/m 2 .h.
对比例1Comparative example 1
一种气体保护焊丝,该焊丝的化学成分按重量百分比计,包括:C:0.067wt.%,Mn:1.55wt.%,Si:0.78wt.%,Ti:0.08wt.%,S:0.015wt.%,P:0.018wt.%,Cu:0.10wt.%,不可能避免杂质元素总和≤0.30wt.%,余量为Fe;各组分的质量百分比之和为100%。A gas shielded welding wire, the chemical composition of the welding wire is calculated by weight percentage, including: C: 0.067wt.%, Mn: 1.55wt.%, Si: 0.78wt.%, Ti: 0.08wt.%, S: 0.015wt .%, P: 0.018wt.%, Cu: 0.10wt.%, it is impossible to avoid the sum of impurity elements ≤ 0.30wt.%, and the balance is Fe; the sum of the mass percentages of each component is 100%.
对得到的焊丝进行熔敷金属性能实验:屈服强度Rp0.2为531MPa;抗拉强度Rm为620MPa;断后伸长率A为20%;低温冲击韧性为:-20℃焊缝冲击功为76.5J;将试样浸入温度为(70±2)℃的50%硫酸溶液中进行24小时腐蚀浸泡试验,试样的平均腐蚀率为412.23g/m2.h。The deposited metal performance test was carried out on the obtained welding wire: the yield strength R p0.2 was 531MPa; the tensile strength R m was 620MPa; the elongation A after breaking was 20%; 76.5J; the sample was immersed in a 50% sulfuric acid solution at a temperature of (70±2)°C for a 24-hour corrosion immersion test, and the average corrosion rate of the sample was 412.23g/m 2 .h.
对比例2Comparative example 2
一种气体保护焊丝,该焊丝的化学成分按重量百分比计,包括:C:0.074wt.%,Mn:1.67wt.%,Si:0.60wt.%,Mo:0.30wt.%,S:0.012wt.%,P:0.014wt.%,Ti:0.07wt.%,Cu:0.10wt.%,不可能避免杂质元素总和≤0.30wt.%,余量为Fe;各组分的质量百分比之和为100%。A gas shielded welding wire, the chemical composition of the welding wire is calculated by weight percentage, including: C: 0.074wt.%, Mn: 1.67wt.%, Si: 0.60wt.%, Mo: 0.30wt.%, S: 0.012wt .%, P: 0.014wt.%, Ti: 0.07wt.%, Cu: 0.10wt.%, it is impossible to avoid the sum of impurity elements ≤ 0.30wt.%, and the balance is Fe; the sum of the mass percentages of each component is 100%.
对得到的焊丝进行熔敷金属性能实验:屈服强度Rp0.2为512MPa;抗拉强度Rm为623MPa;断后伸长率A为23.0%;低温冲击韧性为:-20℃焊缝冲击功为85J;将试样浸入温度为(70±2)℃的50%硫酸溶液中进行24小时腐蚀浸泡试验,试样的平均腐蚀率为389.12g/m2.h。The deposited metal performance test was carried out on the obtained welding wire: the yield strength R p0.2 was 512MPa; the tensile strength R m was 623MPa; the elongation A after fracture was 23.0%; the low-temperature impact toughness was: 85J; the sample was immersed in a 50% sulfuric acid solution at a temperature of (70±2)°C for a 24-hour corrosion immersion test, and the average corrosion rate of the sample was 389.12g/m 2 .h.
对比例3Comparative example 3
一种气体保护焊丝,该焊丝的化学成分按重量百分比计,包括:C:0.062wt.%,Mn:1.45wt.%,Si:0.87wt.%,Ti:0.12wt.%,S:0.006wt.%,P:0.015wt.%,B:0.0028wt.%,Cu:0.10wt.%,不可能避免杂质元素总和≤0.30wt.%,余量为Fe;各组分的质量百分比之和为100%。A gas shielded welding wire, the chemical composition of the welding wire is calculated by weight percentage, including: C: 0.062wt.%, Mn: 1.45wt.%, Si: 0.87wt.%, Ti: 0.12wt.%, S: 0.006wt .%, P: 0.015wt.%, B: 0.0028wt.%, Cu: 0.10wt.%, it is impossible to avoid the sum of impurity elements ≤ 0.30wt.%, and the balance is Fe; the sum of the mass percentages of each component is 100%.
对得到的焊丝进行熔敷金属性能实验:屈服强度Rp0.2为545MPa;抗拉强度Rm为640MPa;断后伸长率A为22.0%;低温冲击韧性为:-20℃焊缝冲击功为86.3J;将试样浸入温度为(70±2)℃的50%硫酸溶液中进行24小时腐蚀浸泡试验,试样的平均腐蚀率为324.55g/m2.h。The deposited metal performance test was carried out on the obtained welding wire: the yield strength R p0.2 was 545MPa; the tensile strength R m was 640MPa; the elongation A after fracture was 22.0%; 86.3J; the sample was immersed in a 50% sulfuric acid solution at a temperature of (70±2)°C for a 24-hour corrosion immersion test, and the average corrosion rate of the sample was 324.55g/m 2 .h.
以上实施例和对比例中,焊丝采用体积百分比组成为Ar占80%、CO2占20%的富Ar混合气体进行焊接获得熔敷金属,其中,焊接参数为:焊接速度:7mm/s;气体流量:22L/min;电流:280A,电压:30V左右,道温140℃。In the above examples and comparative examples, the welding wire is welded with an Ar-rich mixed gas whose volume percentage is 80% and CO2 is 20%, to obtain deposited metal, wherein the welding parameters are: welding speed: 7mm/s; gas flow rate : 22L/min; current: 280A, voltage: about 30V, channel temperature 140°C.
本发明各实施例和对比例的焊丝的化学成分总结如表1所示。Table 1 summarizes the chemical composition of the welding wires of the various embodiments and comparative examples of the present invention.
表1化学成分Table 1 chemical composition
本发明各实施例和对比例的焊丝熔覆金属的性能总结如表2所示。Table 2 shows the performance summary of the welding wire cladding metal of each embodiment and comparative example of the present invention.
表2熔覆金属性能Table 2 cladding metal properties
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202211663009.1A CN115805389A (en) | 2022-12-23 | 2022-12-23 | Gas protection solid welding wire suitable for being matched with sulfuric acid dew point corrosion resistant pipeline |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202211663009.1A CN115805389A (en) | 2022-12-23 | 2022-12-23 | Gas protection solid welding wire suitable for being matched with sulfuric acid dew point corrosion resistant pipeline |
Publications (1)
Publication Number | Publication Date |
---|---|
CN115805389A true CN115805389A (en) | 2023-03-17 |
Family
ID=85486599
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202211663009.1A Pending CN115805389A (en) | 2022-12-23 | 2022-12-23 | Gas protection solid welding wire suitable for being matched with sulfuric acid dew point corrosion resistant pipeline |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN115805389A (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004090045A (en) * | 2002-08-30 | 2004-03-25 | Nippon Steel Corp | Gas shielded arc welding wire for low alloy steel excellent in hydrochloric acid resistance and sulfuric acid resistance and gas shielded arc welding method using the same |
CN104551349A (en) * | 2014-11-26 | 2015-04-29 | 南京钢铁股份有限公司 | Gas shielded welding process for sulphuric-acid-dew-point-erosion-resistant steel |
CN104593699A (en) * | 2014-12-09 | 2015-05-06 | 北京国电富通科技发展有限责任公司 | Welded steel pipe |
CN109877487A (en) * | 2019-03-19 | 2019-06-14 | 首钢集团有限公司 | A kind of high impact toughness solid welding wire with acid corrosion resistance and preparation method thereof |
CN114616072A (en) * | 2019-11-07 | 2022-06-10 | 株式会社神户制钢所 | Welding wire for gas shielded arc welding |
-
2022
- 2022-12-23 CN CN202211663009.1A patent/CN115805389A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004090045A (en) * | 2002-08-30 | 2004-03-25 | Nippon Steel Corp | Gas shielded arc welding wire for low alloy steel excellent in hydrochloric acid resistance and sulfuric acid resistance and gas shielded arc welding method using the same |
CN104551349A (en) * | 2014-11-26 | 2015-04-29 | 南京钢铁股份有限公司 | Gas shielded welding process for sulphuric-acid-dew-point-erosion-resistant steel |
CN104593699A (en) * | 2014-12-09 | 2015-05-06 | 北京国电富通科技发展有限责任公司 | Welded steel pipe |
CN109877487A (en) * | 2019-03-19 | 2019-06-14 | 首钢集团有限公司 | A kind of high impact toughness solid welding wire with acid corrosion resistance and preparation method thereof |
CN114616072A (en) * | 2019-11-07 | 2022-06-10 | 株式会社神户制钢所 | Welding wire for gas shielded arc welding |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP7655658B2 (en) | 400MPa-class corrosion-resistant rebar and its production method | |
CN108526750B (en) | High-strength high-toughness high-nitrogen austenitic stainless steel welding wire and preparation method thereof | |
WO2003044236A1 (en) | Low alloy steel excellent in resistance to corrosion by hydrochloric acid and corrosion by sulfuric acid and weld joint comprising the same | |
CN111057945B (en) | A kind of 500MPa grade strong and tough weathering bridge steel and preparation method thereof | |
CN101722386B (en) | Gas shield welding wire with high strength and tenacity | |
CN110293332B (en) | High-strength weather-proof and fire-resistant steel welding alkaline flux-cored wire | |
CN103451561B (en) | Weather-resistant steel plate capable of being welded at high heat input and production method thereof | |
CN115011876B (en) | Steel for high-temperature sulfuric acid dew point corrosion resistance and manufacturing method | |
CN115341132B (en) | Corrosion-resistant 460 MPa-grade steel plate and production method thereof | |
CN114986017B (en) | Gas shielded welding wire for corrosion-resistant high-strength steel | |
CN114289929A (en) | MIG welding solid wire for high manganese austenitic low temperature steel and its welding process | |
CN111136403A (en) | High-toughness 17-4PH precipitation hardening stainless steel metal core welding wire | |
WO1999009231A1 (en) | Austenitic stainless steel excellent in resistance to sulfuric acid corrosion and workability | |
CN112496592B (en) | 15-5PH martensite precipitation hardening stainless steel metal core welding wire | |
CN113564481A (en) | Low-cost sulfate acid dew point corrosion resistant steel plate and manufacturing method thereof | |
CN101892439A (en) | Sulfuric acid dew point corrosion resistant steel | |
CN114892075A (en) | Low-temperature L-shaped steel and preparation method thereof | |
CN112935627A (en) | Consumable electrode gas shielded solid welding wire for welding refractory weathering steel | |
CN115805389A (en) | Gas protection solid welding wire suitable for being matched with sulfuric acid dew point corrosion resistant pipeline | |
CN106312365A (en) | Gas shielded welding wire for high-strength high-toughness weathering resistant steel | |
CN112975194B (en) | Low-yield-ratio high-strength weathering resistant steel welding rod | |
WO2022267149A1 (en) | 460 mpa-grade all-position gas shielded welding wire for building resistant to secondary fire and manufacturing method | |
JP2000015480A (en) | WELDING METAL FOR HIGH Cr FERRITIC HEAT RESISTANT STEEL | |
JP7648868B2 (en) | Steel | |
JPH08134587A (en) | Welded structural steel with excellent weather resistance |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination |