The invention relates to the soft magnetic sintering technology field, in particular to a soft magnetic sintering process, a soft magnetic sintering process described in the invention as follows: A, soft magnetic sheet is pressed into a round hair embryo; B, the soft magnetic sheet hair is vertically placed along the opening groove of the refractory push plate, so that the outer edge of the soft magnetic sheet hair is touched on both sides of the opening groove. C, the fire-resistant push plate which is filled with the soft magnetic hair embryo is put into the electric kiln, and the refractory push plate passes through the first heating zone, the second heating zone, the sintering zone and the heat preservation zone in the electric kiln, in which the temperature of the sintering zone is above 50; the soft magnetic sheet formed in the thermal insulation area is taken out, and the structure is reasonable and the circular soft magnetic sheet is vertical row. It is arranged on the opening groove for sintering and forming. The shrinkage of the soft magnetic sheet at high temperature makes the size fit the diameter of the opening groove. The contact between the soft magnetic disk and the bottom of the open slot ensures the uniform force, thus solving the deformation of the soft magnetic sheet during the sintering process, and improving the production efficiency and reducing the cost.
【技术实现步骤摘要】
一种软磁烧结工艺
本专利技术涉及软磁烧结
,具体指一种软磁烧结工艺。
技术介绍
烧结是软磁材料成型中的重要一环,烧结是粉末或粉末压坯加热到低于其中基本成分的熔点的温度,然后以一定的方法和速度冷却到室温的过程。烧结的结果是粉末颗粒之间发生粘结,烧结体的强度增加,把粉末颗粒的聚集体变成为晶粒的聚结体,从而获得所需的物理、机械性能的制品或材料。一代烧结工艺是将软磁片平铺字耐火钵内,一炉可烧结的产品数量很少效率很低;而二代烧结工艺对此进行了改进,耐火钵表面开有卡槽,软磁片竖直排列在卡槽上,相对于一代烧结工艺提高了1.45倍的产量,但是烧结后的软磁片存在弯曲不平整的问题,需要对其进行平面修磨以符合尺寸规格,生产流程较长,且成品率不高。其原因在软磁片在升温区时与卡槽契合,进入烧结区在1250℃的高温下软磁片逐渐收缩变小,软磁片底部与卡槽构成点接触从而产生应力使其弯曲变形。因此,现有技术还有待于改进和发展。
技术实现思路
本专利技术的目的在于针对现有技术的缺陷和不足,提供一种烧结效率高、可有效解决烧结变形问题,避免后续研磨的软磁烧结工艺。为了实现上述目的,本专利技术采用以下技术方案:本专利技术所述的一种软磁烧结工艺,其步骤如下:a、软磁片压制成圆形毛胚;b、将软磁片毛胚竖直沿耐火推板的开口槽依次摆放,使软磁片毛胚的外缘抵触开口槽的两侧边;c、将摆满软磁片毛胚的耐火推板放入电窑,耐火推板在电窑内依次经过第一升温区、第二升温区、烧结区和保温区,其中烧结区的温度在50℃以上;d、将保温区内成型的软磁片取出。根据以上方案,所述耐火推板上设有若干开口槽,若干开口槽相互平行且相互 ...
【技术保护点】
1.一种软磁烧结工艺,其步骤如下:a、软磁片(12)压制成圆形毛胚;b、将软磁片(12)毛胚竖直沿耐火推板(1)的开口槽(11)依次摆放,使软磁片(12)毛胚的外缘抵触开口槽(11)的两侧边;c、将摆满软磁片毛胚的耐火推板放入电窑,耐火推板在电窑内依次经过第一升温区、第二升温区、烧结区和保温区,其中烧结区的温度在1250℃以上;d、将保温区内成型的软磁片(12)取出。
【技术特征摘要】
1.一种软磁烧结工艺,其步骤如下:a、软磁片(12)压制成圆形毛胚;b、将软磁片(12)毛胚竖直沿耐火推板(1)的开口槽(11)依次摆放,使软磁片(12)毛胚的外缘抵触开口槽(11)的两侧边;c、将摆满软磁片毛胚的耐火推板放入电窑,耐火推板在电窑内依次经过第一升温区、第二升温区、烧结区和保温区,其中烧结区的温度在1250℃以上;d、将保温区内成型的软磁片(12)取出。2.根据权利要求1所述的软磁烧结工艺,其特征在于:所述耐火推板(1)上设有若干开口槽(11),若干开口槽(11)...
【专利技术属性】
技术研发人员:徐晓兵,龙克文,
申请(专利权)人:佛山市川东磁电股份有限公司,佛山市程显科技有限公司,
类型:发明
国别省市:广东,44
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