The invention discloses a preparation method of high stability nano-alloy, which makes alloy inner core and annular alloy compact, the shrinkage coefficient of annular alloy compact is larger than that of alloy inner core, and the alloy inner core is nested in annular alloy compact, the interference fit of the two forms nested parts; the nested parts are sintered in sintering furnace for the first time, vacuum is pumped into nitrogen gas, and sintering temperature is 1200-1300. The sintering time is 1 3 hours at C, and the sintering temperature is 1380-1470. The sintering time is 1 2 hours, then sintering is completed at room temperature. The advantages of the present invention are as follows: by pressing the compacts with different shrinkage coefficients by two or more kinds of powders respectively, and then by two product nested charging methods, the internal firing dimension and the external firing dimension and the internal firing dimension can be matched, so that gradient nanoalloys of different brands inside and outside can be prepared, and the external diameter of the product can be increased by this method.
【技术实现步骤摘要】
一种高稳定性纳米合金的制备方法
本专利技术涉及一种高稳定性纳米合金的制备方法。
技术介绍
在纳米合金在使用的过程中,产品内外的要求是不一样的,这样对合金的性能需求也就有差别。用构造法制备梯度纳米合金,若两种牌号的料分别加入到模具中,使得内外料不同,由于两种牌号料的收缩系数不同,会造成烧结过程中开裂,或者烧成后产品变形严重,无法加工。
技术实现思路
本专利技术的目的在于提供一种高稳定性纳米合金的制备方法,能够有效解决现有构造法制备梯度纳米合金在烧制过程中容易变形开裂的问题。为了解决上述技术问题,本专利技术是通过以下技术方案实现的:一种梯度结构纳米合金的制备方法,依次包括以下步骤:A.制作合金内芯和环形合金压坯,环形合金压坯的收缩系数大于合金内芯,将合金内芯嵌套在环形合金压坯内,两者过盈配合组成嵌套件;B.将嵌套件放入烧结炉内进行第一次烧结,抽真空后充入氮气,烧结温度1200~1300℃,烧结时间1-3小时;C.抽真空进行二次烧结,烧结温度1380~1470℃,烧结时间1-2小时,降至室温,完成烧结。与现有技术相比,本专利技术的优点是:通过用两种或者两种以上牌号的粉料,分 ...
【技术保护点】
1.一种高稳定性纳米合金的制备方法,其特征在于:依次包括以下步骤:A.制作合金内芯和环形合金压坯,环形合金压坯的收缩系数大于合金内芯,将合金内芯嵌套在环形合金压坯内,两者过盈配合组成嵌套件;B.将嵌套件放入烧结炉内进行第一次烧结,抽真空后充入氮气,烧结温度1200~1300℃,烧结时间1‑3小时;C.抽真空进行二次烧结,烧结温度1380~1470℃,烧结时间1‑2小时,降至室温,完成烧结。
【技术特征摘要】
1.一种高稳定性纳米合金的制备方法,其特征在于:依次包括以下步骤:A.制作合金内芯和环形合金压坯,环形合金压坯的收缩系数大于合金内芯,将合金内芯嵌套在环形合金压坯内,两者过盈配合组成嵌套件;B.将...
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