热喷涂技术
熱噴塗技術
열분도기술
Thermal Spray Technology
2015年
3期
60-66
,共7页
Wolfgang Tillmann%Peter Hollingsworth%Ingor Baumann%Marcel Laschitzki
Wolfgang Tillmann%Peter Hollingsworth%Ingor Baumann%Marcel Laschitzki
Wolfgang Tillmann%Peter Hollingsworth%Ingor Baumann%Marcel Laschitzki
HVOF喷涂%WC-12Co%薄涂层
HVOF噴塗%WC-12Co%薄塗層
HVOF분도%WC-12Co%박도층
HVOF-Spraying%WC-12Co%Thin Coatings
HVOF喷涂制备WC-12Co耐磨涂层的厚度通常在50至500μm之间,这个厚度既可以确保涂层结构均匀,同时也保证了足够的材料储备用来进行有效的磨损保护.对于表面需要高精度的零部件,厚涂层必须采用成本高昂的精准加工、磨削和抛光工艺.因此,制备光滑的薄涂层是非常有必要的.在本研究中,HVOF工艺以细的团聚烧结型WC-12Co粉末(2~10μm)为原料制备薄碳化物涂层,涂层厚度可降至50μm以下.本论文系统研究了送粉速度、喷枪速度和轨道间距的变化对涂层厚度的影响,并重点研究了涂层的硬度和表面粗糙度的变化.
HVOF噴塗製備WC-12Co耐磨塗層的厚度通常在50至500μm之間,這箇厚度既可以確保塗層結構均勻,同時也保證瞭足夠的材料儲備用來進行有效的磨損保護.對于錶麵需要高精度的零部件,厚塗層必鬚採用成本高昂的精準加工、磨削和拋光工藝.因此,製備光滑的薄塗層是非常有必要的.在本研究中,HVOF工藝以細的糰聚燒結型WC-12Co粉末(2~10μm)為原料製備薄碳化物塗層,塗層厚度可降至50μm以下.本論文繫統研究瞭送粉速度、噴鎗速度和軌道間距的變化對塗層厚度的影響,併重點研究瞭塗層的硬度和錶麵粗糙度的變化.
HVOF분도제비WC-12Co내마도층적후도통상재50지500μm지간,저개후도기가이학보도층결구균균,동시야보증료족구적재료저비용래진행유효적마손보호.대우표면수요고정도적령부건,후도층필수채용성본고앙적정준가공、마삭화포광공예.인차,제비광활적박도층시비상유필요적.재본연구중,HVOF공예이세적단취소결형WC-12Co분말(2~10μm)위원료제비박탄화물도층,도층후도가강지50μm이하.본논문계통연구료송분속도、분창속도화궤도간거적변화대도층후도적영향,병중점연구료도층적경도화표면조조도적변화.
The thicknesses of HVOF-sprayed WC-12Co wear protective coatings usually range between 50~500μm. These thicknesses ensure a homogeneous coating structure as well as sufficient material reserves for an efficient wear protection. For applications which require high shape accuracies, a cost intensive finishing of the thick coatings, in terms of grinding and polishing, is necessary. Thus, smooth and thin coatings are favored. In this study, thin HVOF-sprayed carbide coatings are developed by means of fine sintered and agglomerated WC-12Co powders (2~10μm). The use of fine powders enables the reduction of the coating thickness down to values below 50μm. To influence and adjust the thickness of the coatings the powder flow, the gun velocity and the track pitch were systematically varied. During these tests the hardness and the roughness of the coatings were scrutinized.
