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热成形淬火对QP1180/22MnB5激光拼焊板组织与性能的影响

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精密成形工程 2024年第1期16卷 112-120页

作者：苏文超王金凤车亚军郭亿王晶湖北汽车工业学院材料科学与工程学院湖北十堰442002 东风汽车零部件(集团)有限公司湖北十堰442016 湖北长平汽车装备有限公司湖北十堰442000

目的对QP1180和22MnB5激光拼焊板进行热成形试验,以解决超高强钢板材焊后的软化问题。方法选择QP1180和22MnB5异种高强钢作为母材进行激光自熔焊,对焊后的激光拼焊板进行热成形试验,通过体式显微镜、扫描电子显微镜、液压拉伸试验机和... 详细信息

目的对QP1180和22MnB5激光拼焊板进行热成形试验,以解决超高强钢板材焊后的软化问题。方法选择QP1180和22MnB5异种高强钢作为母材进行激光自熔焊,对焊后的激光拼焊板进行热成形试验,通过体式显微镜、扫描电子显微镜、液压拉伸试验机和维氏硬度计等手段,分析热成形前后激光拼焊板微观组织和力学性能的变化。结果与焊态拉伸试样相比,热成形试样抗拉强度提高了135%,断后伸长率降低了55%,拉伸试样都在22MnB5母材处断裂,均为塑性断裂。在热成形后,对焊接接头进行组织分析,发现QP1180母材区马氏体含量增加,22MnB5母材区和临界热影响区组织由珠光体和铁素体转变为马氏体,焊接接头热影响区各亚区的组织均转变为大小不同的板条马氏体。硬度测试结果表明,焊态试样焊接接头的QP1180临界区存在软化现象,硬度值最低为335HV,22MnB5侧硬度值由母材处向焊缝升高,母材硬度最低为170HV;而在热成形后,QP1180临界区软化现象消失,硬度值趋于平缓,22MnB5母材处硬度比焊态试样硬度高了2倍。结论与焊态试样相比,经热成形后激光拼焊板的焊后软化问题得到了解决。

关键词：异种高强钢激光拼焊热冲压成形力学性能微观组织

滇东南茶花寨金矿床载金黄铁矿LA-ICPMS原位微量元素组成与地质意义

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矿物学报 2024年第1期44卷 122-132页

作者：陈威鸿刘玉平杨昌毕叶霖刘仕玉苏文超中国科学院地球化学研究所矿床地球化学国家重点实验室贵州贵阳550081 中国科学院大学北京100049 云南省地质矿产勘查开发局第二地质大队云南文山663000 贵州大学资源与环境工程学院贵州贵阳550025

右江盆地是世界上卡林型金矿床最集中的地区之一,盆地南缘的滇东南地区是其重要组成部分。茶花寨金矿床为滇东南地区产于印支运动不整合面附近的代表性金矿床,黄铁矿为主要的载金矿物,其环带特征明显,为认识该区卡林型金矿成矿作用提供... 详细信息

右江盆地是世界上卡林型金矿床最集中的地区之一,盆地南缘的滇东南地区是其重要组成部分。茶花寨金矿床为滇东南地区产于印支运动不整合面附近的代表性金矿床,黄铁矿为主要的载金矿物,其环带特征明显,为认识该区卡林型金矿成矿作用提供了理想的实例。本文在野外考察及镜下观察的基础上,通过LA-ICPMS分析技术,对茶花寨金矿床中不同期次黄铁矿开展了原位微量元素组成分析,以总结不同成矿阶段金的富集特征与关键控制因素。研究结果表明,该矿床黄铁矿存在3个期次:沉积成因的Py1,包括草莓状黄铁矿Py1a和环带状黄铁矿核部Py1b,交代成因的中间环带Py2,热液成因最外侧环带Py3。其中,Py1b富集Sb、Pb、Zn等元素,Py2富集As、Co、Ni,Py3则具有较高的Au、As、Cu、Sb含量和稍高的Se、Hg、Tl含量。三者对比显示,Py2中As含量最高,Py1b和Py2除As以外的其他微量元素含量接近或Py2中含量稍低,二者Co/Ni比值均在0.1附近,表明Py2为Py1b受热液交代改造形成;而Py3中微量元素组成与Py1b和Py2差异明显,指示其热液成因,且Py3中Co、Ni含量相较Py1b和Py2更低,Co/Ni比值在0.01~0.1之间,表明成矿流体温度较低且不富集Co、Ni,Py3中Co、Ni主要继承自Py1b和Py2。该矿床Au主要以晶格金的形式赋存在Py3中,其进入黄铁矿晶格与As、Sb、Cu、Se等元素相关。综上所述,茶花寨金矿床成矿流体为富集Au、As、Cu、Sb、Se、Tl等元素的低温热液流体,在到达赋矿地层后,交代Py1b形成高砷的中间环带Py2,流体中Au受高砷的Py2吸附聚集,在Py3形成过程中沉淀下来,最终以固溶体的形式赋存其中。

关键词：黄铁矿 LA-ICPMS 微量元素茶花寨金矿床滇东南

Emplacement Ages and Geochemical Characteristics of Grabbroic Intrusions and Prospecting Orientation of Related Deposit in Luodian,Guizhou Province

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Acta Geologica Sinica(English Edition) 2008年第4期82卷 864-874页

作者： FANG Weixuan HU Ruizhong su wenchao XIAO Jiafei Beijing Technological Center of Resource Exploration China Non-ferrous Metals Geological Survey Beijing 100012 State Key Laboratory of Deposit Geochemistry Chinese Academy of Sciences Guiyang Guizhou 550002

Emplacement ages, geochemical characteristics and analysis of continental dynamics on gabbroic intrusions in Luodian County, Guizhou Province, have been discussed based on studies of isotopic chronology （the whole-rock Sm-Nd and Rb-Sr isochron methods）, major elements, trace elements and PGE. Intrusive activities of the gabbroic intrusions in the study area took place during the Late Yanshanian Orogenic Movement （the Cretaceous Period）, as indicated by the Sm-Nd isochron ages （t）=（99.6±4.5）（2σ） Ma and by the Rb-Sr isochron ages t=（97±1.6）（2σ） Ma. The gabbroic intrusions are attached to mafic rocks in cal-alkaline basaltic series. They occurred as dikes and might be formed under an extensional background of the continent. Differentiation of their magmatic crystallization resulted in obvious zonation of petrography. In the gabbroic intrusions of this study, large ion lithophile elements and LREE are enriched, and the chondrite-normalized REE distribution pattern is leftward inclined without anomalies of JCe or JEu, and there are high concentrations of PGE and ratios of Pd/Ir （averaging 4.21）. All of these imply that their source areas may be basaltic magma in the upper mantle with high-level partial melting, derived from EMl-type enriched mantle. It is different from Emeishan basalt, which may be related to the upper mantle at low-grade partial melting. Emplacement mechanism of the gabbroic intrusions in this study may suppose to be asthenosphere upheaving as an isolated hot wave in the presence of mantle fluid, resulting in basaltic magma intruded into the continental crust as a diapiric intrusion. Therefore, uplifting of faulting-block and extensional deformation could take place in the shallow part of the continental crust while vertical amassing and accretion of magmatic materials in the deep part of the continental crust. These special processes could supposed to be a special background of continental dynamics for this large-scale epithermal metallogenic domain

关键词： emplacement age geochemical characteristics continental dynamics gabbroic intrusion,Luodian County of Guizhou Province

Analysis of rare-earth elements in fluid inclusions by inductively coupled plasma-mass spectrometry (ICP-MS)

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Chinese Science Bulletin 1998年第22期43卷 1922-1927页

作者： wenchao su Liang Qi Ruizhong Hu Guoping Zhang Chinese Acad Sci Inst Geochem Open Lab Ore Deposit Guiyang 550002 Peoples R China

Inductively coupled plasma_mass spectrometry (ICP_MS) is used to determine rare_earth elements abundances in fluid inclusions. Quartz separates from the Lannigou and Yata Carlin_type gold deposits, southwestern China, were prepared by the decrepitation_leach method. Leachates were analyzed by ICP_MS, using conventional sample introduction. The results demonstrate that the decrepitation_leach method, in combination with ICP_MS analysis of leachates, is effective for REE determination. The chondrite_normalized REE patterns of inclusion fluids for the Lannigou and Yata samples associated with gold mineralization are characterized by light rare_earth elements (LREE) enrichment, with a weak negative Ce anomaly and a positive or negative Eu anomaly, whereas the pattern for the Lannigou sample associated with late gold mineralization (quartz_calcite stage) is characterized by LREE enrichment relative to HREE, with negative Ce and Eu anomalies.

关键词： fluid inclusions rare_earth elements ICP_MS.

The occurrence of gold in hydrothermal sulfide at Southwest Indian Ridge 49.6°E

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Acta Oceanologica Sinica 2012年第6期31卷 72-82页

作者： YE Jun SHI Xuefa YANG Yaomin LI Naisheng LIU Jihua su wenchao Institute of Oceanology Chinese Academy of SciencesQingdao 266007China First Insititute of Oceanography State Oceanic AdministrationQingdao 266061China Graduate University of the Chinese Academy of Sciences Beijing 100049China National Oceanographic Center Qingdao 266071China State Key Laboratory of Ore Deposit Geochemistry Chinese Academy of SciencesGuiyang 550002China

Massive sulfide precipitates found in the Southwest Indian Ridge （SWIR） 49.6°E hydrothermal field are enriched in gold. Here, the mineralogy and mineral chemistry of these massive sulfides to constrain the process of gold precipitation were studied. sulfide samples in this field include lower- temperature Zn-rich sulfides and relative higher-temperature Fe-rich sulfides. Zn-rich sulfides are dominated by sphalerite-pyrite-chalcopyrite assemblages, with concentrations of gold ranging from 9.08 to 17.0 μg/g. Fe-rich sulfides consist mainly of pyrite-marcasite-isocubanite assemblages, with gold concentrations from 2.17 to 3.79 μg/g. The significant enrichment in gold within the lower- temperature Zn-rich sulfides and the effective separation of Zn and Fe in hydrothermal precipitates at the surface of this field are here interpreted to reflect the strong temperature dependence of gold transportation and deposition within the sulfides. In Zn-rich samples, large amounts of isolated native gold grains were identified. They were found mainly as inclusions up to 8 μm in diameter, occupying porous cavities in sphalerite or in the elevated iron content rim of sphalerite. The fineness of the gold ranged from 810 to 830. Unlike previously published results on other hydrothermal fields, these data show a low gold fineness values in SWIR 49.6°E. The FeS content of sphalerite associated with gold grains ranged from 3.2 mole % to 18.9 mole %. This was higher than in other fields, indicating that the sulfur activity is relatively low during the gold precipitation process and that sulfur activity may be one of the main factors affecting gold fineness in the SWIR 49.6°E hydrothermal field. Evidence regarding gold fineness and sulfur activity suggests that gold was quite likely transported as AuHS° rather than as a Au（HS）2- complex.

关键词： hydrothermal sulfide Southwest Indian Ridge occurrence of gold mineralogy

Diagenetic-metallogenic ages of pyritic cherts and their implications in Mojiang nickel-gold deposit in Yunnan Province,China

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Chinese Science Bulletin 2001年第21期46卷 1823-1827页

作者： FANG Weixuan HU Ruizhong XIE Guiqing su wenchao QI Liang Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550002China Northwest Geological Exploration Bureau Chinese National Nonfer-rous Metal CorporationXi’an 710054China

Diagenetic-metallogenic ages of pyritic cherts formed by the syn-sedimentation of hydrothermal vent and ages of the Jinchang Rock Formation in the Mojiang large nickel-gold deposit in the Ailaoshan gold metallogenic belt have been discussed on the basis of chronology of isotopic geochemistry. Nickel-gold-bearing pyritic cherts in the mining were formed by syn-sedimentation of hydrothermal vent in the Late Devonian, i.e. age by Sm-Nd isochronal method (t) = (358±8.6) (2σ) Ma and age by Rb-Sr isochronal method (t) = (354.7±0.72) (2σ) Ma. On the other hand, deep-water cherts from the Jinchang Rock Formation of the Upper Devonian in the area were initiated at the same time; that is, age by Sm-Nd isochronal method (t) = (359(+21) (2(7) Ma and age by Rb-Sr isochronal method (t) = (358.02±0.30) (2σ) Ma.

关键词： metallogenic age age by Sm-Nd isochronal method age by Rb-Sr isochronal method Mojiang nickel-gold deposit.

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电弧熔覆韧-硬复合层工艺及性能研究

精密成形工程 2024年第6期16卷 107-114页

作者：郭亿王金凤苏文超车亚军蔡笑宇柯浩李文娟湖北汽车工业学院材料科学与工程学院湖北十堰442002 哈尔滨工业大学先进焊接与连接国家重点实验室哈尔滨150001 东风零部件(集团)有限公司湖北十堰442016 武汉理工大学材料科学与工程学院武汉430070

目的为增强Q960E钢表面的使用性能、减少裂纹的产生,设计并制备了一种韧-硬复合梯度过渡熔覆层。方法通过实验比对,选出了适合的过渡层与高硬层熔覆材料。首先选择XY-26F-104合金粉末作为熔覆材料,用TIG焊将材料熔覆在基板上作为过渡层... 详细信息

目的为增强Q960E钢表面的使用性能、减少裂纹的产生,设计并制备了一种韧-硬复合梯度过渡熔覆层。方法通过实验比对,选出了适合的过渡层与高硬层熔覆材料。首先选择XY-26F-104合金粉末作为熔覆材料,用TIG焊将材料熔覆在基板上作为过渡层,其次采用CO_(2)气体保护焊在过渡层上熔覆YD557堆焊焊丝获得高硬层。通过优化熔覆工艺得到无裂纹、无气孔、成形良好的熔覆层。对获得的梯度过渡熔覆层进行组织分析、硬度和冲击韧性等测试。结果基体-过渡层-高硬层两两之间产生了良好的冶金结合,熔覆层中无明显缺陷产生。微观形貌分析结果表明,在过渡层中有胞状晶与胞状枝晶产生,高硬层主要由板条马氏体组成。硬度测试结果表明,基体硬度为350HV,高硬层的平均硬度为620HV,过渡层平均硬度为480HV,过渡层硬度处于高硬层硬度与基板硬度之间,各部分硬度的梯度分布既提高了复合板的耐磨性,又增强了复合板的韧性。在冲击性能测试中,基体的平均冲击吸收功为34 J,复合板的平均冲击吸收功为68.48 J,为基体的2.5倍。在摩擦磨损实验中,基材的磨损质量为15.1 mg,而熔覆层的磨损质量仅为4.2 mg,基体的磨损质量为熔覆层的3.59倍;熔覆层平均摩擦因数为0.3987,相较于基材的降低了0.0728;熔覆层的磨损机制为磨粒磨损,基材的磨损机制为黏着磨损。结论设计的复合梯度熔覆层既能提高表面的使用性能,又能增强熔覆层的韧性,减少裂纹的产生。

关键词：电弧熔覆宏观形貌微观组织显微硬度冲击韧性磨损性能

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On emplacement ages of lam-proites in Zhenyuan County,Guizhou Province,China

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Chinese Science Bulletin 2002年第10期47卷 874-880页

作者： Weixuan Fang Ruizhong Hu wenchao su Jiafei Xiao Liang Qi Guohao Jiang Chinese Acad Sci Inst Geochem Lab Ore Deposit Geochem Guiyang 550002 Peoples R China

Emplacement ages of lamproites that comprise lamproite and olivine lamproite in Zhenyuan County, Guizhou Province, China, have been constrained by the whole-rock Sm-Nd and Rb-Sr isochron methods and the whole rock K-Ar method. Intrusive activities of lamproites in the Sinantang area of Zhenyuan County, Guizhou Province, took place during the Late Cambrian, as indicated by the Sm-Nd isochron ages (t) = (503±17) (2σ) Ma and by the Rb-Sr isochron ages (t) = (501.2±4.6) (2σ) Ma. Intrusive activities of olivine lamproites at the Maping with Ⅱ -type diamond and Xitou in Zhenyuan County, Guizhou Province, took place from the Late Cambrian to the Early Ordovician, as evidenced by the Sm-Nd isochron ages (t) = (502±27) (2σ) Ma and by the Rb-Sr isochron age (t) = (502± 27) (2σ) Ma. This suggests that the upwelling hot materials derived from the deep mantle were emplaced from the Late Cambrian to the Early Ordovician (503-497 Ma), while the time terminal of cooling of the geothermal event of

关键词： the Sm-Nd isochron age the Rb-Sr isochron age whole rock K-Ar method lamproite Zhenyuan County of Guizhou Prov-ince China.

Re–Os dating of molybdenite and in-situ Pb isotopes of sulfides from the Lamo Zn–Cu deposit in the Dachang tin-polymetallic ore field, Guangxi, China

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Acta Geochimica 2018年第3期37卷 384-394页

作者： Hai Zhao wenchao su Peng Xie Nengping Shen Jiali Cai Ming Luo Jie Li Zhian Bao State Key Laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of SciencesGuiyang 550081 China University of Chinese Academy of Sciences Beijing 100049China Limited Company of Jilang Indium Industries Nandan 547200 China State Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of SciencesGuangzhou 510640 China State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China Present Address: 99 Linchengxi Road Guanshanhu DistrictGuiyang 550081 China

The Dachang tin-polymetallic district, Guangxi,China, is one of the largest tin ore fields in the world. Both cassiterite-sulfide and Zn–Cu skarn mineralization are hosted in the Mid-Upper Devonian carbonate-rich sediments adjacent to the underlying Cretaceous Longxianggai granite(91–97 Ma). The Lamo Zn–Cu deposit is a typical skarn deposit in the district and occurs at the contact zone between the Upper Devonian limestone and the *** ore minerals mainly consist of sphalerite, arsenopyrite,pyrrhotite, galena, chalcopyrite, and minor ***, the age of mineralization and source of the metals are not well constrained. In this study, we use the molybdenite Re–Os dating method and in-situ Pb isotopes of sulfides from the Lamo deposit for the first time in order to directly determine the age of mineralization and the tracing source of metals. Six molybdenite samples yielded a more accurate Re–Os isochron age of 90.0 ± 1.1 Ma(MSWD = 0.72), which is much younger than the reported garnet Sm–Nd isochron age of 95 ± 11 Ma and quartz fluid inclusions Rb–Sr isochron age of 99 ± 6 Ma. This age is also interpreted as the age of Zn–Cu skarn mineralization in the Dachang district. Further, in this study we found that in-situ Pb isotopes of sulfides from the Lamo deposit and feldspars in the district's biotite granite and granitic porphyry dikes have a narrow range and an overlap of Pb isotopic compositions(^(206) Pb/^(204) Pb =18.417–18.594,^(207) Pb/^(204) Pb = 15.641–15.746, and^(208) Pb/^(204) Pb = 38.791–39.073), suggesting that the metals were mainly sourced from Cretaceous granitic magma.

关键词： Molybdenite Re-Os dating In-situ leadisotopes Skarn deposit - Dachang