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| 1 | A review of friction stir welding of steels: Tool, material flow, microstructure, and properties显示文摘Considerable progress has been achieved in friction stir welding(FSW) of steels in every aspect of tool fabrication, microstructure control and properties evaluation in the past two decades. With the development of reliable welding tools and precise control systems, FSW of steels has reached a new level of technical maturity. High-quality, long welds can be produced in many engineering steels. Compared to traditional fusion welding, FSW exhibits unique advantages producing joints with better properties. As a result of active control of the welding temperature and/or cooling rate, FSW has the capability of fabricating steel joints with excellent toughness and strength. For example, unfavorable phase transformations that usually occur during traditional welding can be avoided and favorable phase fractions in advanced steels can be maintained in the weld zone thus avoiding the typical property degradations associated with fusion welding. If phase transformations do occur during FSW of thick steels, optimization of microstructure and properties can be attained by controlling the heat input and post-weld cooling rate. | F.C. Liu Y. Hovanski M.P. Miles C.D. Sorensen T.W. Nelson | 2018 | Journal of Materials Science & Technology2018，34，1： | 16 |
| 2 | 双环电化学动电位再活化法评价11Cr铁素体不锈钢晶间腐蚀敏感性显示文摘利用TEM,EDS和SAED等分析方法,研究了11Cr铁素体不锈钢409L在600℃敏化下析出物特性,并将双环电化学动电位再活化法(DL-EPR)用于评价409L钢的晶间腐蚀敏感性,通过研究DL-EPR的扫描速率、介质成分、介质温度对测试结果的影响,对该方法进行了优化,并用该优化法研究了敏化处理对409L钢晶间腐蚀敏感性的影响.结果表明,敏化的409L钢发生晶间腐蚀是由于M_(23)C_6沿晶界析出.在最优化条件下,DL-EPR法能定量评价409L钢的晶间腐蚀敏感性且具有良好的重复性.随敏化处理时间延长,沿晶界析出的M_(23)C_6增多,晶间腐蚀敏感性也随之增强. | 强少明 江来珠 李劲 刘天伟 吴艳萍 蒋益明 | 2015 | 金属学报2015，51，11： | 8 |
| 3 | Q235钢搅拌摩擦焊接头微观组织与力学性能分析显示文摘在焊接速度为100 mm/min和搅拌头转速为450 r/min的工艺参数下,采用钨铼合金搅拌头对3 mm厚Q235钢进行了搅拌摩擦焊试验,并对接头的微观组织及力学性能进行了研究.结果表明,在该工艺参数下可以获得表面无缺陷、成形良好的焊缝.焊后搅拌头表现出一定程度的磨损及氧化.接头截面各区域承受不同的热力联合作用,经历了不同的组织转变过程,但均保持铁素体和珠光体组织.接头显微硬度最大值位于焊核区.接头拉伸断裂位置处于热影响区,拉伸断口呈韧性断裂特征. | 周利 张仁晓 舒凤远 黄永宪 冯吉才 | 2019 | 焊接学报2019，40，3： | 7 |
| 4 | Microstructure and Mechanical Properties of a Dissimilar Friction Stir Weld between Austenitic Stainless Steel and Low Carbon Steel显示文摘Dissimilar fusion welding of austenitic stainless steels to carbon steels has some metallurgical and technical problems.It was suggested that the solid-state nature of friction stir welding(FSW) can overcome these problems and produce a sound weld with reliable mechanical properties.In this study,plates of 304 stainless steel and st37 steel were welded together by FSW at tool rotational speed of 600 r/min and welding speed of 50 mm/min.In the stir zone(SZ) of 304 stainless steel,the results showed a refined grain structure with some features of metadynamic recrystallization.In the SZ of st37 steel,the hot deformation of material in the austenite region produced small austenite grains.These grains transformed to fine ferrite and pearlite by cooling the material after FSW.The production of fine grains increased the hardness and tensile strength in the SZ of both sides with respect to their base metals(BMs). | M Jafarzadegan A.Abdollah-zadeh A.H.Feng T.Saeid J.Shen H.Assadi | 2013 | Journal of Materials Science & Technology2013，29，4： | 6 |
| 5 | ODS钢搅拌摩擦焊接头的微观组织及其高温力学性能显示文摘采用搅拌摩擦焊(friction stir welding,FSW)技术对氧化物弥散强化(oxide dispersion strengthen,ODS)铁素体钢进行了焊接,并对焊接工艺进行了优化.当转速为150 r/min,焊接速度为30 mm/min时可以获得无焊接缺陷的ODS钢焊接接头.结果表明,采用FSW焊接的ODS钢接头的微观组织出现明显的洋葱环结构,搅拌区为等轴再结晶晶粒,前进侧热机影响区表现出明显的塑性流动的特征,热影响区的晶粒较母材也发生了明显改变.接头的高温拉伸性能偏低,但经过温度1 150℃,时间1 h的热处理后,其高温拉伸性能得到大幅提高,与母材拉伸性能接近. | 张静 韩文妥 常永勤 万发荣 | 2015 | 焊接学报2015，36，10： | 6 |
| 6 | 阻碍钢的搅拌摩擦焊研究进展的关键问题显示文摘搅拌摩擦焊(FSW)是一种固相焊接技术,在焊接铝、镁及其合金等低熔点金属上发展已相当成熟。焊接异种金属也获得了缺陷少的接头。钢在工业上的应用比其他金属更广泛,因此目前搅拌摩擦焊的研究主要集中在钢板的焊接。本文主要讨论了制约搅拌摩擦焊焊接钢板的3个关键问题,即搅拌头的结构设计、开发价格低廉且有良好高温耐磨性的搅拌头材料及昂贵的搅拌摩擦焊设备。 | 顾艳红 焦向东 周灿丰 高辉 车俊铁 | 2015 | 焊接技术2015，44，5： | 3 |
| 7 | Effects of different friction stir welding conditions on the microstructure and mechanical properties of copper plates显示文摘Friction stir welding is a new and innovative welding method used to fuse materials. In this welding method, the heat generated by friction and plastic flow causes significant changes in the microstructure of the material, which leads to local changes in the mechanical properties of the weld. In this study, the effects of various welding parameters such as the rotational and traverse speeds of the tool on the microstructural and mechanical properties of copper plates were investigated; additionally, Charpy tests were performed on copper plates for the first time. Also, the effect of the number of welding passes on the aforementioned properties has not been investigated in previous studies. The results indicated that better welds with superior properties are produced when less heat is transferred to the workpiece during the welding process. It was also found that although the properties of the stir zone improved with an increasing number of weld passes, the properties of its weakest zone, the heat-affected zone, deteriorated. | Ali Alavi Nia Ali Shirazi | 2016 | International Journal of Minerals,Metallurgy and Materials2016，23，7： | 1 |
| 8 | Hot Corrosion Behavior of Friction Welded AISI 4140 and AISI 304 in K_2SO-60% NaCl Mixture显示文摘Understanding the behavior of weldment at elevated temperatures and especially the corrosion behavior has become an object of scientific investigation recently.Investigation has been carried out on friction welded AISI 4140 and AISI 304 in molten salt of K 2 SO 4-60% NaCl environment at 550,600 and 650 C under cyclic condition.The resulted oxide scales in the weldment have been characterized systematically by surface analytical techniques.From the results of the experiments,it is observed that the scale thickness on low alloy steel side was higher than that on stainless steel side.Furthermore,weld interface has been found to be more susceptible to degradation than base metals due to inter diffusion of element across the interface and the formation of intermetallic compound.The influences of welding parameters and the temperature of exposure on the hot corrosion behavior of the weldment were discussed in this paper. | N.Arivazhagan K.Senthilkumaran S.Narayanan K.Devendranath Ramkumar S.Surendra S.Prakash | 2012 | Journal of Materials Science & Technology2012，28，10： | 0 |
| 9 | 铁素体不锈钢焊缝晶粒细化技术的研究现状显示文摘铁素体不锈钢具有无Ni、导热性好、线膨胀系数小和成本低等优点,且在氯离子环境下具有比奥氏体不锈钢更好的耐应力腐蚀性能,被广泛应用于汽车、海工和石化等领域。但在焊接过程中,焊缝区和热影响区极易产生晶粒粗大的现象,导致接头塑韧性下降,尤其是厚板大熔深的自熔焊接时塑韧性呈断崖式下降。本文通过收集、分类和分析国内外铁素体不锈钢焊缝晶粒细化的研究数据,总结了铁素体不锈钢焊缝晶粒细化的方法,如控制焊接参数、预热与提高冷却速度、调整熔池合金元素、脉冲焊接、电磁搅拌和超声波振动等方法。基于现有文献,采用非均质形核、促进晶粒游离以及枝晶熔断三种不同的机制来解释焊缝组织晶粒细化现象。最后对铁素体不锈钢焊缝晶粒细化方法进行了展望,采用外加能场的方法对熔池金属的流动具有一定影响,特别是研究多物理场下的焊缝组织晶粒长大行为,将为大熔深自熔焊焊接头性能的提高提供新的思路与方法。未来研发实际应用性强的晶粒细化装置和设备,发展大熔深自熔焊接下铁素体不锈钢焊缝的晶粒细化技术将成为主要趋势。 | 董志海 李逸文 Aleksandr Babkin 常云龙 | 2022 | 材料导报2022，36，21： | 0 |
| 10 | 手工自蔓延立焊Q235钢接头的抗拉强度与断口微观形貌显示文摘以Q235钢为母材进行手工自蔓延立焊试验,并利用接头拉伸性能测试、SEM、EDS和XRD研究焊接接头的抗拉强度及断口形貌。结果表明,手工自蔓延立焊Q235钢所得焊接接头在进行拉伸测试时,塑性变形不明显,抗拉强度可达367 MPa。断口发现大量均匀细小的等轴韧窝和一定量的撕裂棱,拉伸试样的断裂是韧性断裂与准解理断裂混合的断裂方式。分析焊接接头组织发现,获得的焊缝合金为铜铁镍合金,富铜相与富铁相均匀分布,但由于焊缝合金中富铜相和富铁相的界面结合比熔合区与热影响区界面结合差,进行拉伸试验时在焊缝合金区断裂。 | 吴永胜 王建江 辛文彤 曲立峰 | 2013 | 粉末冶金材料科学与工程2013，18，6： | 0 |
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