CN111705288A - 一种应用于气粉磨的复合涂层 - Google Patents
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Abstract
本发明涉及一种用于气粉磨的复合涂层,采用等离子熔敷法将金属化合物陶瓷材料熔敷在气粉磨内壁上,所述金属化合物陶瓷材料包括:硬质相,所述硬质相由选自周期表第4族和第6族金属的碳化物、氧化物固溶体中的一种或多种化合物构成,构成这些化合物的金属元素主要为W、Cr;粘接相,所述粘接相主要采用Fe、Ni、W、Cr、Zn、Cu中的一种或多种金属元素。本发明采用熔敷和等离子喷涂相结合的金属化合物复合陶瓷涂层,涂层与基体属于冶金结合,结合紧密且强度高;采用熔敷等表面处理工艺,避免了镶嵌硬质合金或陶瓷片产生的各种缝隙缺陷等,提高了气粉机的工作效率,降低了流体对内衬的冲蚀磨损,大大延长了气粉机的使用寿命。
Description
技术领域
本发明涉及新材料技术领域,具体涉及一种应用于气粉磨的复合涂层。
背景技术
气流粉碎的一般原理:将干燥无油的压缩空气或过热蒸汽通过拉瓦尔喷管加速成超音速气流,喷出的高速射流带动物料做高速运动,使颗粒相瓦碰撞、摩擦而被粉碎。被粉碎的物料随气流到达分级区,达到细度要求的物料最终由捕集器收集,没有达到要求的物料再返回粉碎室继续粉碎,直至达到所需细度并被捕集为止。气粉磨内衬一般为合金材质,带有多个研磨喷嘴,其常见的问题为:内衬和喷嘴易磨损,且易锈蚀,近几年,部分厂家开发了硬质陶瓷作为内衬,更加耐磨且可以更换,但在实际应用中会出现陶瓷破碎等情况,且破碎的陶瓷内衬会直接污染和损坏下游设备,尤其是自动包装机等设备,以下因素也会导致陶瓷内衬损坏;内衬自身也会出现质量问题,在热胀冷缩过程中出现破裂,内衬与气粉机外体安装精密度不够没有预留热胀冷缩的空间,出现积压破裂,操作员升温和降温过快等都会导致内衬的损坏,具体表现有图1为内衬磨损后的照片,严重影响气粉磨的使用。
发明内容
为克服所述不足,本发明的目的在于提供一种用于气粉磨的金属陶瓷复合涂层以及其制备方法。
本发明解决其技术问题所采用的技术方案是:一种用于气粉磨的复合涂层,包括:
硬质相,所述硬质相由选自周期表第4族和第6族金属的碳化物、氧化物固溶体中的一种或多种化合物构成,构成这些化合物的金属元素主要为W、Cr;
粘接相,所述粘接相主要采用Fe、Ni、W、Cr、Zn、Cu中的一种或多种金属元素。
具体地,所述金属化合物陶瓷材料包括硬质相、粘结相、稀土元素。
具体地,所述金属化合物陶瓷材料包括Fe、Ni、C、W、稀土元素,其质量百分比为:Fe:3-5%,Ni:50-60%,C:2-3%,W:30-45%,稀土元素:2-5%。
具体地,所述金属化合物陶瓷材料包括Cr、O、Zn、Cu、稀土元素且质量百分比为:Cr:50-60%,O:10-20%,Zn:10-20%,Cu:2-6%,稀土元素:2-4%。
一种用于气粉磨的金属陶瓷复合涂层的制备方法,包括以下步骤:
D1.工件表面预处理:对工件表面进行预处理,先用丙酮有机溶剂清除表面油污,然后采用10-20目金刚砂进行喷砂处理,使表面粗化、活化,表面清洁度达到Sa2.5;
D2.等离子熔敷:利用等离子弧产生的热量将金属化合物陶瓷材料粉末熔化,其参数为:电流160—450A,电压25—70V,喷枪距工件距离5-20cm,使熔滴与工件形成小于0.5mm的冶金结合,从而达到合金金属以最小的热输入量和最小的稀释率与被保护工件冶金结合的目的。
本发明具有以下有益效果:本发明采用熔敷和等离子喷涂相结合的金属化合物复合陶瓷涂层,涂层与基体属于冶金结合,结合紧密且强度高;采用熔敷等表面处理工艺,避免了镶嵌硬质合金或陶瓷片产生的各种缝隙缺陷等,提高了气粉机的工作效率,降低了流体对内衬的冲蚀磨损,大大延长了气粉机的使用寿命。
附图说明
图1为现有技术中内衬磨损后的照片。
具体实施方式
现在结合附图对本发明作进一步详细的说明。
实施例一
一种用于气粉磨的复合涂层,所述涂层的制备主要是采取表面处理工艺在基体表面形成一种能够满足特殊性能的涂覆层,其主要方法有熔敷(等离子或激光)、热喷涂、电镀、气相沉积等,本发明主要采用了等离子熔敷工艺。W、Ti、Cr、Si等化合物陶瓷涂层是一类以WC、TiC、Cr2O3、SiO2、SiC等混合粉为硬质相主要原料,以Co、Ni等金属为粘接相原料,通过等离子工艺与基体形成耐磨涂层;所述金属化合物陶瓷材料包括Fe、Ni、C、W、稀土元素,其质量百分比为:Fe:3-5%,Ni:50-60%,C:2-3%,W:30-45%,稀土元素:2-5%。
上述金属陶瓷复合涂层的制备方法,包括以下步骤:
D1.工件表面预处理:对工件表面进行预处理,先用丙酮有机溶剂清除表面油污,然后采用10-20目金刚砂进行喷砂处理,使表面粗化、活化,表面清洁度达到Sa2.5;
D2.等离子熔敷:利用等离子弧产生的热量将金属化合物陶瓷材料粉末熔化,其参数为:电流160—450A,电压25—70V,喷枪距工件距离5-20cm,使熔滴与工件形成小于0.5mm的冶金结合,从而达到合金金属以最小的热输入量和最小的稀释率与被保护工件冶金结合的目的。
实施例二
一种应用于气粉磨的复合涂层,所述涂层的制备主要是采取表面处理工艺在基体表面形成一种能够满足特殊性能的涂覆层,其主要方法有熔敷(等离子或激光)、热喷涂、电镀、气相沉积等,本发明主要采用了等离子熔敷工艺。W、Ti、Cr、Si等化合物陶瓷涂层是一类以WC、TiC、Cr2O3、SiO2、SiC等混合粉为硬质相主要原料,以Co、Ni等金属为粘接相原料,通过等离子工艺与基体形成耐磨涂层;所述金属化合物陶瓷材料包括Cr、O、Zn、Cu、稀土元素且质量百分比为:Cr:50-60%,O:10-20%,Zn:10-20%,Cu:2-6%,稀土元素:2-4%。
一种用于气粉磨的金属陶瓷复合涂层的制备方法,包括以下步骤:
D1.工件表面预处理:对工件表面进行预处理,先用丙酮有机溶剂清除表面油污,然后采用10-20目金刚砂进行喷砂处理,使表面粗化、活化,表面清洁度达到Sa2.5;
D2.等离子熔敷:利用等离子弧产生的热量将金属化合物陶瓷材料粉末熔化,其参数为:电流160—450A,电压25—70V,喷枪距工件距离5-20cm,使熔滴与工件形成小于0.5mm的冶金结合,从而达到合金金属以最小的热输入量和最小的稀释率与被保护工件冶金结合的目的。
本发明不局限于所述实施方式,任何人应得知在本发明的启示下作出的结构变化,凡是与本发明具有相同或相近的技术方案,均落入本发明的保护范围之内。
本发明未详细描述的技术、形状、构造部分均为公知技术。
Claims (6)
1.一种用于气粉磨的复合涂层,其特征在于:采用等离子熔敷法将金属化合物陶瓷材料熔敷在气粉磨内壁上,所述金属化合物陶瓷材料包括:
硬质相,所述硬质相由选自周期表第4族和第6族金属的碳化物、氧化物固溶体中的一种或多种化合物构成,构成这些化合物的金属元素主要为W、Cr;
粘接相,所述粘接相主要采用Fe、Ni、W、Cr、Zn、Cu中的一种或多种金属元素。
2.根据权利要求1所述的一种用于气粉磨的复合涂层,其特征在于:所述金属化合物陶瓷材料包括硬质相、粘结相、稀土元素。
3.根据权利要求1所述的一种用于气粉磨的复合涂层,其特征在于:所述金属化合物陶瓷材料包括Fe、Ni、C、W、稀土元素,其质量百分比为:Fe:3-5%,Ni:50-60%,C:2-3%,W:30-45%,稀土元素:2-5%。
4.根据权利要求1所述的一种用于气粉磨的复合涂层,其特征在于:所述金属化合物陶瓷材料包括Cr、O、Zn、Cu、稀土元素且质量百分比为:Cr:50-60%,O:10-20%,Zn:10-20%,Cu:2-6%,稀土元素:2-4%。
5.根据权利要求1所述的一种用于气粉磨的复合涂层,其特征在于:所述等离子熔敷法,包括以下步骤:
D1.工件表面预处理:对工件表面进行预处理,先用丙酮有机溶剂清除表面油污,然后采用10-20目金刚砂进行喷砂处理,使表面粗化、活化,表面清洁度达到Sa2.5;
D2.等离子熔敷:利用等离子弧产生的热量将金属化合物陶瓷材料粉末熔化。
6.根据权利要求5所述的一种用于气粉磨的复合涂层,其特征在于:其参数为:等离子熔敷的参数为:电流160—450A,电压25—70V,喷枪距工件距离5-20cm,使熔滴与工件形成小于0.5mm的冶金结合。
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