热锻模具钢表面熔覆CoCrFeNiBWSi_(x)涂层组织及力学性能研究  

Microstructure and Mechanical Properties of CoCrFeNiBWSi_(x) Coating on Hot Forging Die Steel

作　　者：张志明 刘玉欣 舒凤远 张雄波 邓加 崔娟 ZHANG Zhiming;LIU Yuxin;SHU Fengyuan;ZHANG Xiongbo;DENG Jia;CUI Juan(Daya Bay Nuclear Power Operation Management Co.,Ltd.,Guangdong Shenzhen 518100,China;National Defense Key Laboratory of Equipment Remanufacturing Technology,Army Armored Forces Academy,Beijing 100072,China;School of Chemical Engineering and Technology,Sun Yat-sen University,Guangdong Zhuhai 519082,China)

机构地区：[1]大亚湾核电运营管理有限责任公司,广东深圳518100 [2]陆军装甲兵学院装备再制造技术国防科技重点实验室,北京100072 [3]中山大学化学工程与技术学院,广东珠海519082

出　　处：《装备环境工程》2025年第3期120-126,共7页Equipment Environmental Engineering

基　　金：山西省科技合作交流项目-区域合作项目(202204041101035);广东省基础与应用基础研究基金(2024A1515011062)。

摘　　要：目的针对H13热锻模具钢在锻压过程中容易出现由硬度不够、疲劳失效和磨损损坏所导致的生产隐患,改善其表面性能。方法选用在Co-06钴基合金熔覆粉末基础上对Si含量做调整后的自配粉末作为熔覆材料,利用金相、SEM、XRD等分析手段对各熔覆层的组织进行研究,使用TH701自动转塔数显显微硬度计进行熔覆层微观硬度测量,使用HT-1000型摩擦磨损实验机进行熔覆层表面摩擦磨损试验,以探究Si含量变化对熔覆层组织形貌、物相结构及力学性能的影响。结果Co06-Si8与Co06-Si12的熔覆层结合区较窄,稀释率较低。熔覆层结合区的Fe元素含量较高,组织形貌显现出非晶特征。Si元素在覆层中的主要存在形式是Fe_(2)Si和Fe_(3)Si,出现了非晶相特征宽晕峰。Co06-Si8和Co06-Si12的覆层硬度较高,磨损形式有磨粒磨损和黏着磨损。结论该研究为锻压加工生产中H13热锻模具钢的应用提供了新的解决方案。The work aims to deal with production hazards of H13 steel caused by insufficient hardness,fatigue failure and wear damage during forging and to improve its surface properties.Self-prepared powder with Si content adjusted on the basis of Co-06 cobalt alloy cladding powder was used as the cladding material.Metalloscope,SEM,XRD,EDS and other analytical tools were used to study the organization of each cladding layer;A TH701 automatic turret digital microhardness tester was used to measure the microhardness of the cladding layer;An HT-1000 type friction wear tester was used to conduct surface friction and wear tests of the cladding layer,to determine the effect of silicon content changes on the microstructure and mechanical properties of the cladding layer.The results showed that the binding zone of the cladding layer with 8% and 12% Si content was narrow and the dilution rate was low.The Fe content in the bonding zone of the cladding layer was high,and the microstructure was amorphous.The main forms of Si elements in the coating were Fe_(2)Si and Fe_(3)Si,and there was a wide halo peak with amorphous phase characteristics.The cladding layer with 8% and 12% Si content had high hardness.The wear forms were abrasive wear and adhesive wear.This research provides a new solution for the application of H13 hot forging die steel in forging production.

关 键 词：激光熔覆 钴基合金 涂层微观组织 高温摩擦磨损 

分 类 号：TG139[一般工业技术—材料科学与工程] TH16[金属学及工艺—合金]