HII／X2CrNiMoN22.5双相不锈复合钢板埋弧自动焊工艺研究

研究了焊接速度对双相不锈钢焊缝中δ铁素体含量的影响规律及ＨＩＩ／Ｘ２ＣｒＮｉＭｏＮ２２．５双相不锈复合钢板的焊接工艺及接头性能，简述了研究成果在ＰＫＭ加压气炉生产中的应用。     

药芯焊丝电弧焊在不锈复合钢制反应器制造中的应用

本文简要地介绍发用Ｅ３０９Ｔ－１Φ１．２不锈钢药芯焊丝ＣＯ２电弧焊，焊接ＳＰＶ３６Ｎ－ＳＵＳ４１０Ｓ不锈复合钢板过渡层及复层焊缝的工艺试验结果。通过检查焊缝的金相组织，测定接头的力学性能，证明上述药芯焊丝电弧焊适合不锈复合钢板过渡层及复层焊缝的焊接。     

埋弧自动焊参数对单面焊双面成形质量的影响

给出了板厚６ｍｍ，８ｍｍ，１０ｍｍ，１２ｍｍ的０９ＣｒＮｉＰＣｕ钢板埋弧自动焊单面焊双面成形的基冷焊接参数，并以１０ｍｍ板为便，研究了焊接参数对焊缝形状尺寸的影响。     

0Cr18Ni10Ti与16Mn锻厚板的焊接

换热器筒体０Ｃｒ１８Ｎｉ１０Ｔｉ与法兰锻１６Ｍｎ厚板的焊接，通过工艺试验及工艺评定，采用Ａ３０２焊要堆焊隔离层，Ｈ０Ｃｒ２０Ｎｉ１０Ｔｉ焊丝＋ＨＪ２６０焊剂埋弧焊填充层，背面清根后手弧焊的焊接工艺，焊后经１００％Ｘ射线检验，焊缝一次合格率为９５％。     

MZG—630型自动埋弧角焊机在起重机箱形主梁焊接中的应用

起重机箱形主梁的四条纵向角焊缝焊接,在我厂先后经历了交流手工电弧焊、ＣＯ２半自动气体保护焊、直流埋弧自动焊的工艺过程。经过多年产品生产实践,根据焊缝质量的提高及经济效益等效果,定位在直流埋弧自动焊接工艺。使用的焊接设备是一种专用于角焊缝焊接的ＭＺＧ—...     

MAG焊在锅炉压力容器焊接中的应用情况分析

根据国内ＣＯ２ 气保焊在锅炉压力容器中的应用情况, 分析了用富氩＋ ＣＯ２ 气体保护焊（ＭＡＧ） 进行锅炉压力容器焊接的可行性,为ＭＡＧ焊在锅炉压力容器行业的普遍应用打下基础;通过对ＭＡＧ焊与焊条电弧焊和埋弧焊焊接接头力学性能的比较及三种焊接方法在产品焊缝中Ｘ射线探伤一次合格率的统计,结果表明：ＭＡＧ焊的力学性能优于焊条电弧焊和埋弧焊, ＭＡＧ焊的焊接质量是稳定的。只要严格控制好影响焊接质量的因素, ＭＡＧ焊在锅炉压力容器主焊缝中的应用前景是光明的。     

药芯焊丝CO2焊在复合钢制压力容器中的应用

介绍了用药焊丝CO2焊焊接16MnR/SUS321不锈钢合钢板压力容器的焊接工艺试验及焊接工艺评定，通过检查焊缝的化学成分，硬度，金相组织，测定接头的力学性能，晶间腐蚀试验等，证明药芯焊丝CO2焊用于不锈复合钢压力容器制造是可行的，对不锈复合压力容器的焊接要点进行了简要说明。     

中硬重载齿轮焊接工艺及制造技术研究

对齿轮用钢３０ＣｒＭｏ，４０ＣｒＮｉ２Ｍｏ，４０ＣｒＭｎＭｏ钢进行了焊接性试验，结果表明：该钢冷裂倾向严重，过热区易淬硬，冲击韧性差，预热及焊后热处理，，选择药芯焊丝Ｅ７０Ｔ－５ＣＯ２焊及ＭＡＧ焊，接头性能可满足技术要求。还介绍了齿轮的制造工艺装焊胎卡具。     

16Mn钢大型工字梁的埋弧焊

提出了１６Ｍｎ钢细长杆类工字梁的埋弧焊焊接工艺参数以及组装焊接生产工艺；解决了细长杆类工字梁埋弧焊时复杂变形的控制问题，探讨了厚板１６Ｍｎ钢埋弧焊时的纹情况以及解决措施。结果表明，采用合理的焊接顺序，能够有效地控制大型工字梁的焊接变形；通过调节焊接工敢以及采取合适的工艺措施，可以解决１６Ｍｎ钢埋弧焊时的开裂问题，获得质量优良的焊缝     

德国V&M公司生产出Φ914mm双相钢无缝管

德国Ｖａｌｌｏｕｒｅｃ＆Ｍａｎｎｅｓｍａｎｎ管材公司（Ｖ＆Ｍ）的Ｄｕｓｓｅｌｄｏｆ－Ｒｅｉｓｈｏｌｚ工厂为挪威的一个海上平台生产出ＸＣｒＮｉＭｏＮ２２－５双相钢无缝钢管,外径９１４ｍｍ（３６”）,壁厚５５ｍｍ。生产这种尺寸的铁素体－奥氏体钢管采用一套特殊的生产工艺,先对钢锭进行穿孔和拉拔,直到加工至最终成品尺寸,并需对钢管内外（包括焊接坡口）表面进行加工。由于这种双相钢只能在一个相当窄的温度带内热成型,因此,该产品的生产应该说是Ｖ＆Ｍ公司在无缝钢管生产工艺方面取得的一大进步。德国V&M公司生产出Φ…     

1Cr18Ni9Ti+Q235复合钢板对接焊缝组织和抗腐蚀性能分析

针对内复合不锈钢焊管制造,采用4种焊接工艺对厚度为3mm+10mm的1Cr18Ni9Ti+Q235复合钢板对接焊缝进行了自动焊接,对焊接接头进行显微组织分析、拉伸、内外弯曲、冲击试验、电化学和晶间腐蚀试验.结果表明,采用TIG焊焊接复层,复层焊缝显微组织为奥氏体加少量铁素体,在1moL/L的盐酸溶液中进行电化学腐蚀试验,其抗电化学腐蚀性能与母材复层相近,无晶间腐蚀现象.基体采用TIG焊的焊接接头,基体焊缝组织为较高强韧性的板条状马氏体,满足力学性能要求.而基体采用SAW焊的焊接接头,基体焊缝力学性能和复层焊缝抗腐蚀性能均不能满足要求.     

焊接工艺对2205双相不锈钢焊接接头综合性能的影响

采用等离子弧焊打底 TIG焊盖面及等离子弧焊打底 MIG焊盖面焊接工艺焊接了2205双相不锈钢,研究了2205双相不锈钢的焊接性,并对焊后固溶处理与未进行固溶处理的焊件组织特征、力学性能及抗腐蚀性进行了比较,研究了不同焊接热输入和固溶处理工艺对焊接接头综合性能的影响.     

铁素体-奥氏体型双相不锈钢的焊接性

本文就铁素体-奥氏体双相不锈钢的焊接冶金特性和焊接性进行了研究。结果表明,母材的两相比例为50:50时,其焊接性优良;奥氏体占优势的双相焊缝具有好的工艺和使用性能;多层焊和附加工艺焊缝是提高焊接接头性能的有效途径。     

SUS304/Q235B双金属冶金复合螺旋管激光-CMT复合焊+埋弧焊接头组织及性能

采用激光-CMT复合焊+埋弧焊的焊接工艺对SUS304/Q235B双金属冶金复合螺旋管进行了生产试制,利用OM,EDS研究了复合管焊缝微观组织特征及合金元素分布,同时检验了焊接接头的力学性能和耐腐蚀性能。结果表明,焊缝合金成分合理,合金元素稀释率低。内焊焊缝(CMT区域)微观组织为奥氏体+铁素体+碳化物析出相,内焊焊缝(LBW区域)微观组织为奥氏体+铁素体+马氏体,Q235B基层焊缝微观组织为铁素体+珠光体;焊接接头抗拉强度平均值为451 MPa,-10 ℃下焊缝及热影响区的冲击吸收能量平均值分别为167 J和236 J,焊接接头面弯、背弯180°拉伸面无裂纹(弯轴直径45 mm),焊缝硬度最高值为285 HV10;晶间腐蚀试验后,管体与焊缝弯曲180°拉伸面无裂纹(弯轴直径4 mm)。SUS304/Q235B双金属冶金复合螺旋管激光-CMT复合焊+埋弧焊接头的各项性能均符合相关标准的要求,能够满足饮用水输送工程的应用需求。创新点： 区别于传统螺旋焊管的双面埋弧焊,采用了激光-CMT复合焊(内焊)+埋弧焊(外焊)的工艺对SUS304/Q235B双金属冶金复合螺旋管进行焊接,形成了“Y+V”形的焊接接头形貌,减小了内、外焊缝的重合量,有效地控制了不锈钢复层一侧焊缝合金元素的稀释及碳钢基层一侧焊缝合金元素的过量裹入,避免了内、外焊缝高硬相的产生,提升了焊接接头的综合性能。     

Welding Heat Input Influence on UNS S82441 Lean Duplex Stainless Steel Corrosion Resistance Assessed by Scanning Vibrating Electrode Technique (SVET)

The precipitation of the intermetallic phases can impair mechanical and corrosion properties. In the case of lean duplex stainless steels, they present solidification mode as primary ferrite, with austenite precipitation in the solid state, during cooling. This means the heat-affected zone balanced microstructure can be changed during the welding by the cooling rate, which is associated to the welding heat input, the thickness of the plate and the physical properties of the material. This work intends to present the influence of welding heat input on the corrosion resistance of UNS S82441 lean duplex stainless steel. The gas metal arc welding process was used to make the weld beads, using ER2209 as filler metal, which characterizes a dissimilar welded joint. The corrosion resistance of these specimens was analyzed through scanning vibrating electrode technique. It was observed that welding heat input variation distinctly influences corrosion in different zones of the weld beads over the specimen exposure time. The weld bead under intermediate welding heat input showed the highest corrosion rate and the one under the highest welding heat input, the lowest corrosion rate intensity.     

珠光体钢与奥氏体钢异种钢焊接材料的选择与应用

分析了珠光体钢与奥氏体钢异种钢的焊接性,介绍了焊接材料的选用原则、材料种类、工艺及工程中的应用.结果表明：该类异种钢焊接材料的选择原则是,尽量选用接近或高于奥氏体钢的高合金成分,而不是接近珠光体钢的成分;尽量避免焊缝中马氏体组织形成,保证接头获得良好的使用性能和焊接性.可供该类异种钢选用的焊接材料种类较多,工艺方法各具特色.三个典型应用案例表明,这类异种钢焊接质量的有效控制,取决于焊接材料的合理选用及正确的工艺方法.新型、高效、自动化焊接材料是颇具推广应用前景的焊接新材料.     

Influence of interpass temperature on the properties of duplex stainless steel during welding by submerged arc welding process

Duplex stainless steels are materials that present high corrosion resistance with high values of mechanical strength, therefore motivating their use in various components in the offshore industry. However, there are major challenges in the welding of these materials in terms of the productivity and quality of the joint produced, considering its extensive use for components of small thickness, such as umbilicals, to those of large thickness, such as salt water injection pipelines. In relation to pipes of small thickness, the gas tungsten arc welding process is successfully used. In thick-walled pipes, the automatic process of submerged arc welding (SAW) has been recently implemented in lines of pre-assembled piping, and this has considerably increased the productivity of the joints produced, though, a great deal of time is required to perform a new weld pass, due to the fact that the maximum interpass temperature needs to be lower than 150 °C. This work presents the results of characterization and the evaluation of corrosion resistance of a welded joint corresponding to DSS UNS S31803, with a wall thickness of 21.4 mm, welded by the gas metal arc welding process in the root and SAW process in the filling and cap passes, employing an interpass temperature between 150 and 290 °C. The results of the characterization of the mechanical properties, chemical composition and corrosion resistance in different regions of the welded joint were compared with those obtained for the base metal of the pipe, as well as with the minimum values required by the project standards. Therefore, this study has made an evaluation of the influence of the interpass temperature in the properties of the joints produced, motivated by a possible increase in productivity in pipe welding.     

Effect of Welding Consumables on Fatigue Performance of Shielded Metal Arc Welded High Strength, Q&T Steel Joints

Quenched and Tempered (Q&T) steels are widely used in the construction of military vehicles due to their high strength-to-weight ratio and high hardness. These steels are prone to hydrogen-induced cracking in the heat affected zone (HAZ) after welding. The use of austenitic stainless steel consumables to weld the above steel was the only remedy because of higher solubility for hydrogen in austenitic phase. Recent studies proved that high nickel steel and low hydrogen ferritic steel consumables can be used to weld Q&T steels, which can give very low hydrogen levels in the weld deposits. In this investigation an attempt has been made to study the effect of welding consumables on high cycle fatigue properties of high strength, Q&T steel joints. Three different consumables namely (i) austenitic stainless steel, (ii) low hydrogen ferritic steel, and (iii) high nickel steel have been used to fabricate the joints by shielded metal arc (SMAW) welding process. The joints fabricated using low hydrogen ferritic steel electrodes showed superior fatigue properties than other joints.     

Q500qENH高性能耐候钢在高架桥工程焊接技术与应用

耐候钢在国内迅速发展,但大多数使用Q345等级以下耐候钢,Q500等级及以上的耐候钢在工程上应用的比较少。文中在对国内耐候钢桥梁进行全面梳理的基础上,依托G109线(忠和傅家窑立交至八里湾)改扩建工程钢结构桥梁项目,对Q500qENH高性能耐候钢及相应焊材的耐腐蚀性能、碳当量等进行计算,分析其防腐和焊接性能。结果表明,钢材和焊接材料耐大气腐蚀系数(I)均大于6,说明其耐腐蚀性能良好;钢材碳当量(CE)大于40%,说明钢材强度增加的同时其焊接性能受到一定的影响;同时对Q500qENH高性能耐候钢采用焊条电弧焊和埋弧焊进行施焊,并进行外观检查、超声检测、力学性能试验及宏观金相试验等焊接工艺评定检验,分析和评价其焊接性能,总结出适用于Q500qENH高性能耐候钢的焊接工艺方法和焊接参数,以期为类似工程项目的焊接施工提供经验借鉴。创新点： 采用Q500qENH高强度耐候钢作为钢结构组合梁下翼缘板,并分析总结适用于Q500qENH高强度耐候钢焊接工艺方法。     

国内外双相不锈钢焊接的研究进展

主要介绍国内外双相不锈钢焊接在各个方面的研究进展.针对双相不锈钢焊接材料的开发,强调Ni和N元素在控制相平衡上的影响;介绍了国内外双相不锈钢焊接方法的最新动态,主要有埋弧焊、等离子弧焊和激光焊的改进、电阻对焊的尝试、新型双弧焊接技术的应用等;分析了奥氏体和铁素体两相比、有害析出物和氢脆对双相不锈钢焊接性的影响及解决措施;讨论了影响双相不锈钢焊接接头腐蚀性能和韧性的因素,对其影响机理进行了初步的解析;最后,进行了总结和展望.