材料保护
材料保護
재료보호
MATERIALS PROTECTION
2010年
1期
60-61
,共2页
段忠清%张宝霞%王泽华%林萍华
段忠清%張寶霞%王澤華%林萍華
단충청%장보하%왕택화%림평화
等离子喷涂%Cr_2O_3-8％TiO_2涂层%黏结强度%显微硬度%孔隙率
等離子噴塗%Cr_2O_3-8％TiO_2塗層%黏結彊度%顯微硬度%孔隙率
등리자분도%Cr_2O_3-8％TiO_2도층%점결강도%현미경도%공극솔
plasma spraying%Cr_2O_3-8％ TiO_2 coating%bonding strength%microhardness%porosity
以往,有关等离子喷涂CrO_3-8%TiO_2 涂层厚度与涂层性能关系的报道较少,为此,通过优化工艺参数,在45钢表面等离子喷涂不同厚度(350,450,550μm)的Cr_2O_3-8%TiO_2涂层,研究了涂层厚度与其结合强度、硬度和孔隙率之间的关系.涂层厚度为350,450,550μm时,结合强度分别为29.2,11.5,7.2 MPa,显微硬度分别为2 528,2 190,1 930 HV;孔隙率分别为3.80%,3.95%,4.45%.结果表明,随Cr_2O_3-8%TiO_2 喷涂层厚度的增加,涂层的结合强度减小,孔隙率增加,造成显微硬度降低.
以往,有關等離子噴塗CrO_3-8%TiO_2 塗層厚度與塗層性能關繫的報道較少,為此,通過優化工藝參數,在45鋼錶麵等離子噴塗不同厚度(350,450,550μm)的Cr_2O_3-8%TiO_2塗層,研究瞭塗層厚度與其結閤彊度、硬度和孔隙率之間的關繫.塗層厚度為350,450,550μm時,結閤彊度分彆為29.2,11.5,7.2 MPa,顯微硬度分彆為2 528,2 190,1 930 HV;孔隙率分彆為3.80%,3.95%,4.45%.結果錶明,隨Cr_2O_3-8%TiO_2 噴塗層厚度的增加,塗層的結閤彊度減小,孔隙率增加,造成顯微硬度降低.
이왕,유관등리자분도CrO_3-8%TiO_2 도층후도여도층성능관계적보도교소,위차,통과우화공예삼수,재45강표면등리자분도불동후도(350,450,550μm)적Cr_2O_3-8%TiO_2도층,연구료도층후도여기결합강도、경도화공극솔지간적관계.도층후도위350,450,550μm시,결합강도분별위29.2,11.5,7.2 MPa,현미경도분별위2 528,2 190,1 930 HV;공극솔분별위3.80%,3.95%,4.45%.결과표명,수Cr_2O_3-8%TiO_2 분도층후도적증가,도층적결합강도감소,공극솔증가,조성현미경도강저.
A series of Cr_2O_3-8% TiO_2 coatings with different thickness (350,450,550μm) were prepared on 45 steel substrate by plasma spraying under optimized parametens. The correlation among the thickness and properties of the ooatings were investigated. Results indicate that the plasma sprayed ceramic coatings with a thickness of 350, 450μm and 550μm have a bonding strength of 29.2, 11.5 MPa and 7.2 MPa, a micro-hardness of 2 528, 2 190 HV and 1 930 HV, and a porosity of 3.80 %, 3.95 % and 4.45 %. This means that the porosity of the plasma sprayed ceramic coatings increases with increasing thickness, while the bonding strength and microhardness of the coatings decrease therewith.
