Determination of carbon and sulfur in cobalt-based brazing filler by high frequency combustion-infrared absorption method
MENG Yi-lin1,2, WANG Lei1,2, SUN Tao1,2, ZHANG Pei-pei1,2
1. AVIC Beijing Institute of Aeronautical Materials, Beijing 100095,China; 2. Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation,Beijing 100095,China
Abstract：The crucible was heated in muffle furnace at 1 100 ℃ for 4 h followed by natural cooling. It was placed in drier and used within one day. Moreover, it should be baked on electric furnace for 30 min before use. 0.5 g of sample, 0.3 g of pure iron and 1.0 g of tungsten-tin particle were added into the crucible after treatment. The single-point calibration curve was prepared using the standard sample of carbon and sulfur in steel. The determination method of carbon and sulfur in cobalt-based brazing filler by high frequency combustion-infrared absorption method was established. The optimized instrumental parameters were as follows: the high frequency power was 90%, both the purge and delay time was 10 s, and the working frequency of furnace brush was 5 times. The lower detection limit of carbon and sulfur was 0.000 64% and 0.000 040%, respectively. The proposed method was applied to the determination of carbon and sulfur in two kinds of cobalt-based brazing filler samples, i.e., Co50NiCrWB and Co45NiCrWB. The relative standard deviations (RSD) of determination results were 3.0%-5.1% and 4.2%-9.0%, respectively. The standard sample of carbon and sulfur in steel (Leco501-501-1#) was added into Co50NiCrWB and Co45NiCrWB samples, and the standard sample of carbon and sulfur in steel (LECO 501-501-2#) was added into Co50NiCrWB sample for the recovery test. The recoveries were between 91% and 112%.
蒙益林, 汪磊, 孙涛, 张佩佩. 高频燃烧-红外吸收法测定钴基钎料中碳和硫[J]. 冶金分析, 2015, 35(8): 39-44.
MENG Yi-lin, WANG Lei, SUN Tao, ZHANG Pei-pei. Determination of carbon and sulfur in cobalt-based brazing filler by high frequency combustion-infrared absorption method. , 2015, 35(8): 39-44.
毛唯,熊华平,谢永慧,等. 两种钴基钎料钎焊SiC陶瓷的接头组织和强度[J]. 稀有金属,2007,31(6):66-67. MAO Wei, XIONG Hua-ping, XIE Yong-hui, et al. Microstructure and bonding strength of SiC joints brazed with two newly-designed Co-based filler metals[J]. Chinese Journal of Rare Metals, 2007,31(6):66-67.
American Society for Testing and Materials. ASTM E1941-10 standard test method for determination of carbon in refractory and reactive metals and their alloys[S]. West Conshohocken: American Society for Testing and Materials, 2010.
[5]
马光强,谢辉. 硫酸钡重量法测定冰铜中总硫[J]. 冶金分析,2014,34(3):73-76.MA Guang-qiang, XIE Hui. Determination of total sulfur in copper matte by barium sulfate gravimetry[J]. Metallurgical Analysis, 2014, 34(3):73-76.
[6]
鲍翠娥. 高频红外吸收法测定金属铼中碳含量[J]. 硬质合金,2007,24(3):178-180.BAO Cui-e. Determination of carbon content in rhenium metal by high frequency infrared absorption[J]. Cemented Carbide,2007,24(3):178-180.
[7]
胡清,王国新,朱玉燕, 等. 高频燃烧-红外吸收法测定金属铬中硫含量[J]. 铁合金,2011(4):46-48. HU Qing, WANG Guo-xin, ZHU Yu-yan, et al. Determination of sulphur content in chromium by high frequency combustion-infrared absorption method[J]. Ferro-alloys,2011(4):46-48.
[8]
鲍翠娥. 高频红外法测定钴、钽、锆中碳含量[J]. 硬质合金,2009,26(3):184-187. BAO Cui-e. Determination of carbon content in the mixture of Co, Ta and Zr with HF-IR[J]. Cemented Carbide,2009,26(3): 184-187.
[9]
杨丽,张庸,张继民,等. 高频燃烧-红外吸收法测定钎料中低碳[J]. 冶金分析,2013,33(9):28-31.YANG Li, ZHANG Yong, ZHANG Ji-min, et al. Determination of low carbon in brazing alloy by high frequency combustion-infrared absorption method[J]. Metallurgical Analysis, 2013, 33(9):28-31
[10]
陈国举,王祝华. 高频燃烧红外吸收法测定电解镍钴铜的微量碳硫[J]. 冶金分析,2004,24(增):382-384.CHEN Guo-ju, WANG Zhu-hua. Determination of low carbon and sulphur in electrolysis nickel, cobalt and copper by high frequency combustion method with infrared absorption method[J]. Metallurgical Analysis,2004,24(Suppl.):382-384.
宋维第,孙莹,陈明. 感应燃烧红外吸收法测定镍基高温合金中痕量硫[J]. 冶金分析,2004,24(4):57-59. SONG Wei-di, SUN Ying, CHEN Ming. Determination of trace sulfur in nickel-base superalloys by infrared absorption method[J]. Metallurgical Analysis,2004,24(4):57-59.
