Preparation of oriented alloy material by original position deep supercooling process

Abstract

A in-situ deep overcold process for preparing the oriented alloy material includes such steps as using HF induction heater and the combination of fused glass protection with cyclic overheat to make the Ni-Fe-Ga, Co-Ni-Ga, or Fe-Ga alloy in overcold state, heating the alloy to the soft point of quartz tube, and flowing the alloy from the first quartz tube to the second one whose bottom is in contact with molten Ga-In alloy.

Description

technical field [0001] The invention relates to a method for preparing an oriented alloy material, in particular to a method for preparing an oriented alloy material by in-situ deep supercooling, which belongs to the field of material technology. Background technique [0002] Magnetic materials are anisotropic, and the properties of materials with different orientations vary greatly. In order to meet practical engineering applications, materials scholars have successively proposed a series of orientation material preparation technologies. Including power reduction method (PD), rapid solidification method (HRS), liquid cooling method (LMC), etc., but using these methods to prepare directional immiscible alloy materials, it is necessary to consider the interphase wetting, the height of the immiscible zone, and the liquid phase Many factors such as line slope, growth rate, and temperature gradient at the front of the solidification interface lead to complex and difficult-to-con...

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Problems solved by technology

Including power reduction method (PD), rapid solidification method (HRS), liquid cooling method (LMC), etc., but using these methods to prepare directional immiscible alloy materials, it is necessary to consider the interphase wetting, the height of the immiscible zone, and the liquid phase Many factors such as line slope, growth rate, and temperature gradient at the front of the solidification interface lead to complex actual production processes, difficult control, and high production costs.

After literature search, it was found that Chinese patent application number 03114937.5, publication number CN1431327A, patent name: method for preparing oriented Ni-Pb immiscible alloy by deep supercooling, this patent proposes a method for preparing oriented Ni-Pb alloy material by using deep supercooling technology In this paper, the method of triggering nucleation of Ni-Pb in the range of 70-110K undercooling is used to prepare oriented materials, but in the actual operation process, there are disadvantages that the trigger position and the size of the trigger point are difficult to control, which often leads to poor orientation effect. Ideal, high scrap rate

Also found in the search, Fu Hengzhi et al published "The solidification characteristics of near rapid and supercooling directional solidification" (solidification characteristics of near rapid deep supercooling directional solidification process), this paper proposes to divide deep supercooling and directional triggering into two steps, and the effect is improved. However, due to the two steps, it leads to The deep undercooling of the alloy obtained in the first step is difficult to maintain in the second step, and the directional trigger of the second step also has uneven melting temperature of the alloy, prone to clogging, and high scrap rate