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CN107971494A 一种粉末热压烧结制备Fe-6.5%Si软磁材料薄带材的方法 无效 - 撤回

一种粉末热压烧结制备Fe-6.5%Si软磁材料薄带材的方法
摘要：
本发明提供一种粉末热压烧结制备Fe-6.5％Si软磁材料薄带材的方法，采用水雾化Fe粉，Si含量为70～80％的高纯硅铁粉，形成Fe-Si混合粉，通过模压成方形坯，热压烧结0.5～2h，使压坯的密度达到6.71～7.03g/cm3；然后将粉末热压烧结坯在1060～1160℃温度范围进行真空或还原气氛保护烧结，使Fe粉颗粒冶金结合，贫Si的α-Fe晶粒和脆性高Si相的多相组织高硅钢坯料，再多次低温扩散烧结和冷轧减薄；最后在1260～1320℃进行高温扩散烧结，实现均质合金化，获得含4.5～6.7％Si的0.1～0.5mm厚，密度≥7.27g/cm3的高硅钢带材。
摘要（英）：

The invention provides a method for preparing a Fe-6.5% Si soft magnetic material thin strip through hot pressing sintering of powder. The method comprises the steps that water-atomized Fe powder andhigh-purity ferrosilicon powder with the Si content being 70-8-% are adopted to form Fe-Si mixed powder, the Fe-Si mixed powder is hot-pressed to form a square blank, and the square blank is subjectedto hot pressing sintering for 0.5-2 h till the density of the pressed blank reaches 6.71-7.03 g/cm<3>; then vacuum or reducing atmosphere shielded sintering in the temperature range of 1060-1160 DEGC is conducted on the blank formed by hot pressing sintering of the powder, Fe powder particle metallurgical bonding is achieved, Si-poor alpha-Fe crystal particles and a high-brittleness Si-phase polyphase structure high silicon steel billet are obtained, and low-temperature diffusion sintering and cold rolling for thinning are conducted repeatedly; and finally high-temperature diffusion sintering of 1260-1320 DEG C is conducted to achieve homogeneous alloying, and the high silicon steel strip with the Si content being 4.5-6.7%, the thickness being 0.1-0.5 mm and the density being greater than or equal to 7.27 g/cm<3> is obtained.

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