Cr<sub>3</sub>C<sub>2</sub>含量对热压烧结WC基硬质合金材料微观组织和力学性能的影响

doi:10.19976/j.cnki.43-1448/TF.2022078

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摘要为了研制高强度高硬度的硬质合金刀具材料,本文采用真空热压烧结技术制备Cr₃C₂含量不同的WC基硬质合金。通过XRD、SEM、EDS等分析手段研究其物相组成及微观形貌,探究Cr₃C₂含量对WC基硬质合金力学性能和微观组织的影响规律。结果表明：在WC-Co硬质合金中添加适量Cr₃C₂可有效抑制WC晶粒异常长大,提高晶粒均匀度,减少微观组织缺陷,进而改善其综合力学性能。随Cr₃C₂含量增加,合金的硬度和抗弯强度先升高后降低,断裂韧性先降低后升高。当Cr₃C₂的质量分数为0.4%时,WC基硬质合金综合力学性能最佳,硬度(HV)达到20.97 GPa,抗弯强度为1 584 MPa,断裂韧性为10.92 MPa∙m^1/2,其中硬度大幅提高对于硬质合金材料用作切削刀具具有重要意义。

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关键词 ：硬质合金, 热压烧结, 力学性能, 微观组织, Cr₃C₂, WC

Abstract：In order to develop cemented carbide tool materials with high strength and high hardness, WC-based cemented carbides with different Cr₃C₂ contents were prepared by vacuum hot-pressed sintering technology. The phase compositions and microstructures of the WC-based cemented carbides were studied by XRD, SEM, and EDS. The effect of Cr₃C₂ content on the mechanical properties and microstructures of WC-based cemented carbide were investigated as well. The results show that appropriate amount of Cr₃C₂ can effectively inhibit the abnormal growth of WC grains, improve grain uniformity, reduce microstructure defects, and improve its comprehensive mechanical properties. With the increase of Cr₃C₂ content, the hardness and bending strength of the alloys increase firstly and then decrease, and the fracture toughness first decreases and then increases. When the mass fraction of Cr₃C₂ is 0.4%, the WC based cemented carbide has the best comprehensive mechanical properties, with the hardness (HV) of

收稿日期: 2022-10-11 出版日期: 2023-03-23

ZTFLH:

TG711

基金资助:国家自然科学基金资助项目(52075300,52275464); 河北省全职引进国家高层次创新型人才科研项目(2021HBQZYC XY004)

通讯作者: 刘含莲,教授,博士。电话：0531-88396913;E-mail: lhl70@sdu.edu.cn

引用本文:

袁玉兰，刘含莲，黄传真，刘洋，王利梅，季良刚. Cr₃C₂含量对热压烧结WC基硬质合金材料微观组织和力学性能的影响[J]. 粉末冶金材料科学与工程, 2023, 28(1): 55-62.
YUAN Yulan, LIU Hanlian, HUANG Chuanzhen, LIU Yang, WANG Limei, JI Lianggang. Effects of Cr₃C₂content on microstructure and mechanical properties of hot-pressed sintered WC based cemented carbides. Materials Science and Engineering of Powder Metallurgy, 2023, 28(1): 55-62.

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http://pmbjb.csu.edu.cn/CN/10.19976/j.cnki.43-1448/TF.2022078 或 http://pmbjb.csu.edu.cn/CN/Y2023/V28/I1/55

[1] 李亚军, 栾道成, 王正云, 等. 晶粒长大抑制剂对超细WC-9%Co硬质合金性能的影响[J]. 硬质合金, 2011, 28(5): 288-293.
LI Yajun, LUAN Daocheng, WANG Zhengyun, et al.Effects of grain growth inhibitors on properties of ultra-fine WC-9%Co cemented carbides[J]. Cemented Carbide, 2011, 28(5): 288-293.
[2] SUN L, YANG T, JIA C, et al.VC, Cr₃C₂ doped ultrafine WC-Co cemented carbides prepared by spark plasma sintering[J]. International Journal of Refractory Metals and Hard Materials, 2011, 29(2): 147-152.
[3] POETSCHKE J, RICHTER V, HOLKE R.Influence and effectivity of VC and Cr₃C₂ grain growth inhibitors on sintering of binderless tungsten carbide[J]. International Journal of Refractory Metals and Hard Materials, 2012, 31: 218-223.
[4] 娄静, 易健宏, 周承商. 微波烧结WC-Co硬质合金致密化与晶粒生长[J]. 中国有色金属学报, 2012, 22(7): 1976-1983.
LOU Jing, YI Jianhong, ZHOU Chengshang.Densification and grain growth of microwave sintered WC-Co cemented carbide[J]. The Chinese Journal of Nonferrous Metals, 2012, 22(7): 1976-1983.
[5] 林信平, 曹顺华, 李炯义. 纳米硬质合金烧结技术进展[J]. 稀有金属与硬质合金, 2004(1): 40-45.
LIN Xinping, CAO Shunhua, LI Jiongyi.Development of sintering methods for nano-structured cemented carbide[J]. Rare Metals and Cemented Carbides, 2004(1): 40-45.
[6] KRUTH J P, MERCELIS P, VAN VAERENBERGH J, et al.Binding mechanisms in selective laser sintering and selective laser melting[J]. Rapid Prototyping Journal, 2005, 11(1): 26-36.
[7] 吴鹏, 温德才, 刘少存, 等. Cr₃C₂含量对纳米WC-6Co复合粉烧结的影响[J]. 闽南师范大学学报(自然科学版), 2016, 29(1): 70-75.
WU Peng, WEN Decai, LIU Shaocun, et al.Effect of Cr₃C₂ addition on the sintering of nano WC-6Co powder[J]. Journal of Minnan Normal University (Nature Science), 2016, 29(1): 70-75.
[8] SUN L, JIA C, CAO R, et al.Effects of Cr₃C₂ additions on the densification, grain growth and properties of ultrafine WC-11Co composites by spark plasma sintering[J]. International Journal of Refractory Metals and Hard Materials, 2008, 26(4): 357-361.
[9] 唐启佳, 李重典, 王雁洁, 等. Cr₃C₂添加量对WC-10Co硬质合金组织与性能的影响[J]. 粉末冶金材料科学与工程, 2018, 23(5): 460-466.
TANG Qijia, LI Zhongdian, WANG Yanjie, et al.Effect of the Cr₃C₂ additive amount on the microstructure and properties of WC-10Co cemented carbides[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(5): 460-466.
[10] 张守全. 碳含量对WC-10Co-0.6Cr₃C₂硬质合金组织结构与性能的影响[J]. 粉末冶金材料科学与工程, 2014, 19(3): 446-450.
ZHANG Shouquan.Effect of carbon content on microstructure and properties of WC-10Co-0.6Cr₃C₂ cemented carbide[J]. Materials Science and Engineering of Powder Metallurgy, 2014, 19(3): 446-450.
[11] 孙文文, 栾道成, 包帅, 等. Cr₃C₂抑制剂含量对WC- 8%Co-0.5%(VC/Cr₃C₂)超细硬质合金性能的影响[J]. 热加工工艺, 2018, 47(16): 70-73.
SUN Wenwen, LUAN Daocheng, BAO Shuai, et al.Study on effects of Cr₃C₂inhibitor content on properties of WC-8%Co-0.5%(VC/Cr₃C₂) ultrafine cemented carbide[J]. Hot Working Technology, 2018, 47(16): 70-73.
[12] 韩小伟, 夏小群. VC含量对WC-12%Co硬质合金性能的影响[J]. 装备制造技术, 2017(1): 106-108.
HAN Xiaowei, XIA Xiaoqun.Effect of VC content on properties of WC-12%Co cemented carbide[J]. Equipment Manufacturing Technology, 2017(1): 106-108.
[13] 张岩, 王洪福, 何泠, 等. Co+Ni, TiC+TaC对WC-Co基硬质合金硬度的影响[J]. 粉末冶金工业, 2017, 27(1): 27-30.
ZHANG Yan, WANG Hongfu, HE Ling, et al.Effects of (Co+Ni), (TiC+TaC) on hardness of WC-Co based cemented carbide[J]. Powder Metallurgy Industry, 2017, 27(1): 27-30.
[14] XIAO D H, HEY H, SONG M, et al.Y₂O₃- and NbC- doped ultrafine WC-10Co alloys by low pressure sintering[J]. International Journal of Refractory Metals and Hard Materials, 2010, 28(3): 407-411.
[15] 王冲. 纳米复合WC-Co材料的低压烧结与晶粒生长抑制机理研究[D]. 武汉: 武汉理工大学, 2005.
WANG Chong.Sinter-HIPing process & mechanism of inhibiting crystal growth in nanocomposite WC-Co materials[D]. Wuhan: Wuhan University of Technology, 2005.
[16] 陈健, 弓满锋, 刘伟, 等. 添加TiC和Cr₃C₂对超细WC-8Co硬质合金微观结构和性能的影响[J]. 人工晶体学报, 2015, 44(5): 1336-1341.
CHEN Jian, GONG Manfeng, LIU Wei, et al.Effect of TiC and Cr₃C₂ addition on microstructures and properties of ultrafine WC-8Co cemented carbides[J]. Journal of Synthetic Crystals, 2015, 44(5): 1336-1341.
[17] BONACHE V, SALVADORM D, FERNANDEZ A, et al.Fabrication of full density near-nanostructured cemented carbides by combination of VC/Cr₃C₂ addition and consolidation by SPS and HIP technologies[J]. International Journal of Refractory Metals and Hard Materials, 2011, 29(2): 202-208.
[18] 张雪辉, 黄柱, 徐畅, 等. Cr₃C₂对SPS烧结WC-6Co硬质合金组织与性能的影响[J]. 中国有色金属学报, 2017, 27(8): 1580-1588.
ZHANG Xuehui, HUANG Zhu, XU Chang, et al.Cr₃C₂ on SPS sintered WC-6Co cemented carbide effect of structure and performance[J]. The Chinese Journal of Nonferrous Metals, 2017, 27(8): 1580-1588.
[19] 李亚军, 栾道成, 王正云, 等. 烧结工艺对超细WC- 6%Co-0.6%(VC/Cr₃C₂/TaC)硬质合金性能的影响[J]. 硬质合金, 2012, 29(1): 24-28.
LI Yajun, LUAN Daocheng, WANG Zhengyun, et al.Effects of sintering process on performance of ultrafine WC- 6%Co-0.6%(VC/Cr₃C₂/TaC) cemented carbide[J]. Cemented Carbide, 2012, 29(1): 24-28.
[20] 马青龙, 陈名海, 刘宁, 等. Cr₃C₂添加量对WC-12%Co超细硬质合金组织和性能的影响[J]. 硬质合金, 2019, 36(1): 29-37.
MA Qinglong, CHEN Minghai, LIU Ning, et al.Effect of Cr₃C₂ content on microstructure and properties of ultra-fine WC-12%Co cemented carbides[J]. Cemented Carbide, 2019, 36(1): 29-37.
[21] 夏艳萍, 余怀民, 魏修宇, 等. 添加Cr₃C₂对WC-Co硬质合金微观组织和性能的影响[J]. 硬质合金, 2017, 34(5): 300-305.
XIA Yanping, YU Huaimin, WEI Xiuyu, et al.Effect of Cr₃C₂ addition on microstructurs and properties of WC-Co cemented carbides[J]. Cemented Carbide, 2017, 34(5): 300-305.