摘要
利用液相烧结工艺成功制得以钢为基、以TLMW50钢结硬质合金为耐磨覆层的复合材料。利用SEM、XRD对经1050℃～1100℃淬火、150℃～250℃回火的TLMW50覆层材料的组织进行分析研究,在ML-10磨粒磨损试验机上对TLMW50覆层的磨粒磨损性能进行测试,结果表明:经过淬火、回火处理的由珠光体+碳化物转变为马氏体+碳化物覆层组织得以不同程度的改善;覆层硬度相由烧结态的45.5HRC上升到60HRC以上。其中,1050℃淬火、150℃回火工艺最优,覆层的磨粒磨损量最少,耐磨性最好,所对应的覆层组织粘结相中除马氏体外还有Hagg碳化物形成,复式碳化物会演变为WC和Fe-WO4等形式。
By the technology of liquid phase sintefing, one composite material has been successfully developed. The composite material was based on steel, and its wear resistant cladding was TLMW50 stccl-bond cemented carbide. The microstrueture of the TLMW50 cladding material, which had been quenched at 1050℃-1100℃ and tempered at 150℃-250℃, was analyzed and researched by SEM and XRD. In addition, the grain-abrasion performance of TLMW50 cladding material was tested by ML-10 grain-abrasion testing machine. The results show that the microstrueture of cladding can be improved by the treatment of quenching and tempering （The microstructure of cladding is transformed from pearlite ＋ carbides to martensite ＋ carbides）, the hardness of the cladding is increased from 45.5HRC in the state of sintering by 15.5HRC-19.5HRC. Among them, the technology of quenching at 1050℃ and tempering at 150℃ is relatively optimal, for by this technology, the wearing weight loss of the cladding is relatively least and its wear resistance is optimal; in the corresponding bonding phase of the cladding＇s microstructure, besides martensites, carbides of Haegg are formed, and multiple carbides will be evolved into the phases of WC and FEWO4.
出处
《硬质合金》
CAS
北大核心
2006年第2期69-74,共6页
Cemented Carbides
基金
河南省重大科技攻关(0422020600)
关键词
热处理
烧结
覆层
微观组织
磨粒磨损
heat treatment, sintering ,cladding, microstructure, grain-abrasion
