热输入对X80级气保护药芯焊丝焊缝金属组织性能的影响
Effect of Heat Input on Microstructure and Properties of X80 grade FCAW-G Welding Metal
- 2023年53卷第10期 页码:90-96
DOI: 10.7512/j.issn.1001-2303.2023.10.14
扫 描 看 全 文
扫 描 看 全 文
吴林恩,刘宇,夏培培,等.热输入对X80级气保护药芯焊丝焊缝金属组织性能的影响[J].电焊机,2023,53(10):90-96.
WU Linen, LIU Yu, XIA Peipei, et al.Effect of Heat Input on Microstructure and Properties of X80 grade FCAW-G Welding Metal[J].Electric Welding Machine, 2023, 53(10): 90-96.
为了提高管道气保药芯焊丝自动焊(FCAW-G)环焊缝的性能,为现场焊接焊材选用和工艺参数制定提供指导,采用实际焊接试验、力学性能测试、显微组织分析等方法,对不同热输入下的X80管线钢气保药芯自动焊焊缝金属的强度、韧性分布规律及组织特征进行了研究。试验结果表明,热输入对X80气保护药芯焊丝焊缝金属显微组织及性能有显著的影响。X80气保药芯焊丝焊缝金属的组织构成主要由针状铁素体AF、多边形铁素体以及粒状贝氏体GB组成,随着热输入的增大,所有的晶粒尺寸有长大的趋势,且准多边形铁素体和多边形铁素体增多,针状铁素体减少;焊缝金属低温冲击韧性呈现先升后降的趋势,当热输入为1.2 kJ/mm时,达到最大值;在大热输入下,焊缝组织粗化,导致焊缝金属强度和断裂韧性降低。综合性能分析结果,当焊接热输入为1.2 kJ/mm时,X80气保药芯焊丝焊缝金属综合性能最佳。
In order to improve the performance of FCAW-G pipeline girth weld and provide guidance for the selection of welding materials and process parameters,the effect of metallographic structure and properties under six welding heat inputs were systematically studied,combined with metallographic analysis, tensile test, impact test, CTOD fracture toughness etc.The test results show that the heat input have great influence on the metallographic structure and properties of weld metal.The microstructure of X80 FCAW-G weld metal consists predominantly polygonal ferrite, acicular ferrite(AF) and granular bainite.With the increasing of the heat input, the grains grow up and the acicular ferrite decreases;The low temperature toughness of weld metal increased with the increasing of heat input at first but when heat input reached 1.2 kJ/mm it decreased with the increasing of heat input. Under high heat input, the weld structure coarsened, which led to the decrease of the weld metal strength and fracture toughness.The X80 FCAW-G weld metal with good properties can be obtained with the heat input of 1.2 kJ/mm.
焊接热输入X80级气体保护焊药芯焊丝焊缝金属组织性能
heat inputX80 grade Gas-shield flux cored wireweld metalmicrostructureproperties
隋永莉,郭锐,张继成.管道环焊缝半自动焊与自动焊技术对比分析[J].焊管,2013,36(9):38-47.
SUI Y L,GUO R,ZHANG J C. Comparative analysis on semi-automatic and automactic welding technology of pipeline circumferential weld[J]. Welded Pipe and Tube,2013,36(9):38-47.
薛振奎,隋永莉.国内外油气管道焊接施工现状与展望[J].焊接技术,2001,30(S):16-18.
XUE Z K,SUI Y L. Current Situation and Prospects of Welding Construction for Oil and Gas Pipelines at Home and Abroad[J]. Welding Technology, 2001, 30(S):16-18.
张振永.高钢级大口径天然气管道环焊缝安全提升设计关键[J]. 油气储运,2020,39(7):740-748.
ZHANG Z Y. Key factors for safety improvement design of girth weld in high-grade large diameter natural gas pipelines[J]. Oil & Gas Storage and Transportation,2020,39(7):740-748.
帅健,王旭,张银辉,等. 高钢级管道环焊缝主要特征及安全性评价[J]. 油气储运,2022,39(6):623-631.
SHUAI J,WANG X,ZHANG Y H,et al. Main characteristics and safety assessment of girth welds in high grade steel pipelines[J]. Oil & Gas Storage and Transportation,2022,39(6):623-631.
薛振奎,隋永莉.焊接新技术在我国管道建设中的应用[J].焊管,2010,33(04):58-61.
XUE Z K,SUI Y L. The Application of the New Welding Technology in Our Country Pipeline Construction[J]. Welded Pipe and Tube,2010,33(04):58-61.
陆阳,邵强,隋永莉,等.大管径、高钢级天然气管道环焊缝焊接技术[J].天然气工业,2020,40(9):114-122.
LU Y,SHAO Q,SUI Y L,et al. Girth welding technology for large-diameter high steel grade gas line pipes[J]. Natural Gas Industry,2020,40(9):114-122.
魏金山,齐彦昌,彭云,等. 热输入对800 MPa级超厚板窄间隙焊缝金属组织和性能的影响[J]. 焊接学报,2012,33(6): 31-34.
WEI J S,QI Y C,PENG Y,et al. Effect of heat input on the microstructure and properties of weld metal welding in a 800MPa grade heavy steel plate with narrow gap groove[J].Transaction of the China Welding Insitution,2012,33(6): 31-34.
李为卫,李嘉良,梁明华,等.热输入量对熔化极气体保护焊焊缝强韧性的影响[J].焊管,2021,44(4):1-4.
LI W W,LI J L,LIANG M H,et al. Effect of heat Input on Strength and Toughness of GMAW Weld[J]. Weld Pipe and Tube,2021,44(4):1-4.
TUMA J,GUBELJAK N,SUSTARSIC B.Fracture toughness of a high-strength low-alloy steel weldment [J]. Materiali in Tehnologije,2006,40(6):263-268.
OHYA K, KIM J.Microstructures relevant to brittle fracture initiation at the heat-affected zone of weldment of a low carbon steel[J].Metallurgical and Materials Transactions A,1996,27A(9):2574-2582.
DAVIS C L,KING J E. Cleavage initiation in the intercritically reheated coarse-grained heat affected zone:Part.Failure criteria and statistical effects[J].Metallurgical and Materials TransactionsA,1996,27A(10):3019-3029.
肖晓明,彭云,马成勇,等.热输入对3Cr耐候钢MAG焊缝金属组织和性能的影响[J]. 焊接学报,2017,38(6):41-46+131.
XIAO X M,PENG Y,MA C Y,et al. Effect of heat input on microstructure and properties of weld metal in MAG welding of weathering steel[J]. Transaction of the China Welding Insitution,2017,38(6):41-46+131.
张德勤,田志凌,杜则裕,等.热输入对X65钢焊缝金属组织及性能的影响[J].焊接学报,2001,22(5):31-33.
ZHANG D Q,TIAN L Z,DU Z Y,et al. Effect of Heat Input on Microstructure and Properties of Weld Metal in X65 Steel[J]. Transaction of the China Welding Insitution,2001,22(5):31-33.
涂思京,闫晓东,赵月红, 等. 电解铜箔表面光亮带产生原因的研究[J]. 稀有金属,2003(7): 464-467.
TU S J,YAN X D,ZHAO Y H,et al. Cause of Forming Light Region on Copper Foils surface[J]. Chinese Journal of Rare Metals,2003(7): 464-467.
相关作者
相关机构