原位碳化快速烧结WC-6Co硬质合金工艺研究
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- 英文论文题名：Study on the Process of in-situ Carbonization and Sintering WC-6Co Cemented Carbides
- 论文作者：郭圣达 ; 鲍瑞 ; 易健宏
- 英文论文作者：GUO Shengda ; BAO Rui ; YI Jianhong ; School of Materials Science and Engineering ; Kunming University of Science and Technology ; Jiangxi University of Science and Technology
- 年：2016
- 作者机构：昆明理工大学材料科学与工程学院;江西理工大学工程研究院;
- 论文关键词：WC-Co硬质合金 ; 原位碳化快速烧结 ; 碳含量 ; 烧结温度 ; 组织结构
- 英文论文关键词：WC-Co cemented carbide ; In-situ carbonization and rapid sintering ; Carbon content ; Sintering temperature ; Microstructure
- 会议召开时间：2016-12-26
- 会议录名称：《中国钨业》创刊三十周年钨业发展报告会暨六届五次理事会论文集
- 语种：中文
- 分类号：TF125.3
- 学会代码：ZGWQ
- 会议名称：《中国钨业》创刊三十周年钨业发展报告会暨六届五次理事会
- 会议地点：中国北京
- 主办单位：中国钨业协会
- 学会名称：中国钨业协会
- 页数：7
- 文件大小：1461k
- 原文格式：D
- 会议级别：全国
摘要
以钨粉、钴粉、碳黑、有机碳为原料,研究了W、Co和C混合粉末在放电等离子烧结系统中碳化反应快速烧结制备WC-6 wt.%Co硬质合金的原位碳化烧结工艺。系统研究了配碳量、烧结温度和加压方式对硬质合金的显微组织结构和性能的影响。结果表明:碳含量为理论值1.2倍时合金物相为纯WC和Co相,无脱碳相,也未发现游离碳;烧结温度在1 250℃时,WC晶粒均匀且无异常长大;在W、Co和C混合粉末烧结初期施加30 Mpa压强,待温度升到800℃时再将压强加到50 MPa制备的合金孔隙较少,致密化程度高。本工艺较传统制备工艺具有流程短,成本低的特点,可为硬质合金工业生产提供参考。
Using tungsten powder, cobalt powder, carbon black and organic carbon as raw materials, the fabricating process of in-situ carbonization and fast sintering WC-6 wt.%Co cemented carbides with the spark plasma sintering system is studied in this paper. The effects of carbon content, sintering temperature and the way of applying pressure to the graphite jig are studied systematically. The results reveal that there are WC and Co phases exist in as-prepared alloys, the decarbonization phase and free carbon are absent when the initial carbon content is 1.2 times of the theoretical value; The grains of WC are uniform and the abnormal growth is absent when sintering temperature is 1 250 ℃; The porosity of the alloy is small when applying 30 MPa on the early stage of the sintering process and rising to 50 MPa when the temperature reaches to 800 ℃. Compared with the traditional process, the proposed procoss in this paper is shorter and the cost is lower. The technology can be applied to the production of cemented carbides directly.
Using tungsten powder, cobalt powder, carbon black and organic carbon as raw materials, the fabricating process of in-situ carbonization and fast sintering WC-6 wt.%Co cemented carbides with the spark plasma sintering system is studied in this paper. The effects of carbon content, sintering temperature and the way of applying pressure to the graphite jig are studied systematically. The results reveal that there are WC and Co phases exist in as-prepared alloys, the decarbonization phase and free carbon are absent when the initial carbon content is 1.2 times of the theoretical value; The grains of WC are uniform and the abnormal growth is absent when sintering temperature is 1 250 ℃; The porosity of the alloy is small when applying 30 MPa on the early stage of the sintering process and rising to 50 MPa when the temperature reaches to 800 ℃. Compared with the traditional process, the proposed procoss in this paper is shorter and the cost is lower. The technology can be applied to the production of cemented carbides directly.
引文
[1]Zhu Huang,Xingrun Ren,Meixia Liu,et al.Effect of Cu on the microstructures and properties of WC-6Co cemented carbides fabricated by SPS[J].International Journal of Refractory Metals and Hard Materials,2016,43:111-116.
[2]Hua.Lin,Jianchun Sun,Chunhong Li,et al.A facile route to synthesize WC-Co nanocomposite powders and properties of sintered bulk[J].Journal of Alloys and Compounds,2016,682:531-536.
[3]黄翔,易丹青,王斌,等.V和Cr对超细WC-Co硬质合金Co粘结相成分与WC/Co界面组织结构的影响[J].2016,21(1):95-102.
[4]羊建高,谭敦强,陈颢.硬质合金[M].长沙:中南大学出版社,2012.
[5]李延俊,廖立,谢克难,等.超细WC-Co硬质合金粉末的制备及其致密化研究[J].功能材料,2013,44(8):1102-1105.
[6]付军,宋晓艳,魏崇斌,等。复合添加晶粒长大抑制剂对WC-Co复合粉烧结硬质合金的影响[J].稀有金属材料与工程,2014.8,43(8):1928-1934.
[7]N.AL-Aqeeli.Characterization of nano-cemented carbide Co-doped with vanadium and chromium carbides.Powder Technology,2015,273:47-53.
[8]Wenbin Liu,Xiaoyan Song,Jiuxing Zhang,et al.Preparation of ultrafine WC-Co composite powder by in situ reduction and carbonization reactions.International Journal of Refractory Metals and Hard Materials,2009,27:115-120.
[9]Qiumin Yang,Jiangao Yang,Hailin Yang,et al.Synthesis and Characterization of WC-Co Nanosized Composite Powders With in situ Carbon and Gas Carbon Sources[J].Metals and Materials International,2016,22(4):663-669.
[10]Rui Bao,Jianhong Yi.Effects of sintering atmosphere on microwave prepared WC–8wt.%Co cemented carbide[J].International Journal of Refractory Metals and Hard Materials,2013,41:315-321.
[11]郭圣达,易健宏,鲍瑞.放电等离子烧结制备钨钴硬质合金的研究现状[J].中国钨业,2015,12,30(6):35-41.
[12]Mirva Eriksson,Mohamed Radwan,Zhijian Shen.Spark plasma sintering of WC,cemented carbide and functional graded materials[J].International Journal of Refractory Metals and Hard Materials,2013,36:31-37.
[13]朱二涛,羊建高,戴煜,等.喷雾干燥-煅烧制备钨钴氧化物粉末的反应机理[J].粉末冶金材料科学与工程,2015,4,20(2):175-181.
[14]M.F.Zawrah.Synthesis and characterization of WC–Co nanocomposites by novel chemical method[J].Ceramics International,2007,33:155-161.
[15]Hua Lin,Bowan Tao,Qing Li,et al.In situ synthesis of WC–Co nanocomposite powder via core–shell structure formation[J].Materials Research Bulletin,2012,47:3283-3286.
[16]HUANG S G,VANMEENSEL K,LI L,et al.Tailored sintering of VC-doped WC-Co cemented carbides by pulsed electric current sintering[J].International Journal of Refractory Metals and Hard Materials,2008,26:256-262.
[17]刘文彬.WC-Co复合粉的原位合成与块体硬质合金的烧结[D].北京:北京工业大学,2009.
[18]GARAY J E.Current-activated,pressure-assisted densification of materials[J].Annual Review of Materials Research,2010,(40):445-468.
[19]RAIHANUZZAMAN R M,XIE Z H,HONG S J.Effect of spark plasma sintering pressure on mechanical properties of WC-7.5wt%Nano Co[J].Materials and Design,2015,(28):221-227.
[2]Hua.Lin,Jianchun Sun,Chunhong Li,et al.A facile route to synthesize WC-Co nanocomposite powders and properties of sintered bulk[J].Journal of Alloys and Compounds,2016,682:531-536.
[3]黄翔,易丹青,王斌,等.V和Cr对超细WC-Co硬质合金Co粘结相成分与WC/Co界面组织结构的影响[J].2016,21(1):95-102.
[4]羊建高,谭敦强,陈颢.硬质合金[M].长沙:中南大学出版社,2012.
[5]李延俊,廖立,谢克难,等.超细WC-Co硬质合金粉末的制备及其致密化研究[J].功能材料,2013,44(8):1102-1105.
[6]付军,宋晓艳,魏崇斌,等。复合添加晶粒长大抑制剂对WC-Co复合粉烧结硬质合金的影响[J].稀有金属材料与工程,2014.8,43(8):1928-1934.
[7]N.AL-Aqeeli.Characterization of nano-cemented carbide Co-doped with vanadium and chromium carbides.Powder Technology,2015,273:47-53.
[8]Wenbin Liu,Xiaoyan Song,Jiuxing Zhang,et al.Preparation of ultrafine WC-Co composite powder by in situ reduction and carbonization reactions.International Journal of Refractory Metals and Hard Materials,2009,27:115-120.
[9]Qiumin Yang,Jiangao Yang,Hailin Yang,et al.Synthesis and Characterization of WC-Co Nanosized Composite Powders With in situ Carbon and Gas Carbon Sources[J].Metals and Materials International,2016,22(4):663-669.
[10]Rui Bao,Jianhong Yi.Effects of sintering atmosphere on microwave prepared WC–8wt.%Co cemented carbide[J].International Journal of Refractory Metals and Hard Materials,2013,41:315-321.
[11]郭圣达,易健宏,鲍瑞.放电等离子烧结制备钨钴硬质合金的研究现状[J].中国钨业,2015,12,30(6):35-41.
[12]Mirva Eriksson,Mohamed Radwan,Zhijian Shen.Spark plasma sintering of WC,cemented carbide and functional graded materials[J].International Journal of Refractory Metals and Hard Materials,2013,36:31-37.
[13]朱二涛,羊建高,戴煜,等.喷雾干燥-煅烧制备钨钴氧化物粉末的反应机理[J].粉末冶金材料科学与工程,2015,4,20(2):175-181.
[14]M.F.Zawrah.Synthesis and characterization of WC–Co nanocomposites by novel chemical method[J].Ceramics International,2007,33:155-161.
[15]Hua Lin,Bowan Tao,Qing Li,et al.In situ synthesis of WC–Co nanocomposite powder via core–shell structure formation[J].Materials Research Bulletin,2012,47:3283-3286.
[16]HUANG S G,VANMEENSEL K,LI L,et al.Tailored sintering of VC-doped WC-Co cemented carbides by pulsed electric current sintering[J].International Journal of Refractory Metals and Hard Materials,2008,26:256-262.
[17]刘文彬.WC-Co复合粉的原位合成与块体硬质合金的烧结[D].北京:北京工业大学,2009.
[18]GARAY J E.Current-activated,pressure-assisted densification of materials[J].Annual Review of Materials Research,2010,(40):445-468.
[19]RAIHANUZZAMAN R M,XIE Z H,HONG S J.Effect of spark plasma sintering pressure on mechanical properties of WC-7.5wt%Nano Co[J].Materials and Design,2015,(28):221-227.