Enhancing the mechanical properties of coarse-grained cemented carbides by tailoring microstructure

被引：2

作者：

Yu, Songbai ^{[1
]}

Zhang, Jianfeng ^{[1
,5
]}

Tong, Jing ^{[2
]}

Min, Fanlu ^{[3
,6
]}

Zhang, Hailong ^{[4
]}

Ma, Jichang ^{[4
]}

Wang, Congxu ^{[4
]}

Zhao, Kui ^{[4
]}

机构：

[1] Hohai Univ, Coll Mech & Mat, Nanjing, Peoples R China

[2] CRRC Qishuyan Inst Co Ltd, Changzhou, Peoples R China

[3] Hohai Univ, Minist Educ, Key Lab Geomech & Embankment Engn, Nanjing, Peoples R China

[4] Shaanxi Aeronaut Carbide Tool Co Ltd, Hanzhong, Peoples R China

[5] Hohai Univ, Coll Mech & Mat, Nanjing 210098, Peoples R China

[6] Hohai Univ, Minist Educ, Key Lab Geomech & Embankment Engn, Nanjing 210098, Peoples R China

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2023年 / 39卷 / 11期

关键词：

Ultra-fine WC@10Co additives; coarse-grained cemented carbide; WC grain; Co structure; mechanical properties; R-CURVE BEHAVIOR; WC-CO; PHASE-STRUCTURE; BINDER; EVOLUTION; FRACTURE; GROWTH; FINE; SIZE; STRENGTH;

D O I：

10.1080/02670836.2023.2170630

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, ultrafine WC@10Co powders were used for the fabrication of coarse-grained WC-10Co with almost full densification. The incorporation of WC@10Co resulted in a decreasing size of WC grain with a rounded shape, the mean free path of Co and the WC contiguity. Further, substantial Co with face-centered cubic structure dispersed uniformly in the cemented carbides with WC@10Co-contained intergranular fracture accompanied by a large number of plastic deformation tears of the Co phase at the fracture surface and crack bridges at the crack tip. Therefore, the hardness, fracture toughness and bending strength of cemented carbides with WC@10Co reached the highest levels of 1045.3 kgf m(-2), 23.6 MPa center dot m(1/2) and 2308 MPa, respectively.

引用

页码：1350 / 1360

页数：11

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