Continuous temperature gradient heat treatment device and method for rod-shaped material

Abstract

The invention relates to the technical field of heat treatment, in particular to a continuous temperature gradient heat treatment device and method for a rod-shaped material. A furnace body of the continuous temperature gradient heat treatment device includes an upper heating zone and a lower heating zone, independent temperature control is performed by using an upper heating power source and a lower heating power source correspondingly, the upper heating zone and the lower heating zone are both closed heating zones, closed heat insulation boards can prevent heat loss, the precise control overthe temperature of the upper heating zone and the lower heating zone is ensured, and therefore the precise control over the temperature gradient of a rod-shaped material standard sample section is realized. The continuous temperature gradient heat treatment device includes vacuuming equipment to allow the rod-shaped material to conduct heat transfer under vacuum to avoid heat convection; an annular radiation screen is arranged between the upper heating zone and the lower heating zone, and the lateral heat dissipation of the standard sample section is suppressed, and the heat transfer can transfer in the longitudinal direction; the rod-shaped material does not in contact with the ring-shaped radiation screen, and heat conduction is avoided; and three aspects work together to enable the rod-shaped material to transfer heat in one dimension in the axial direction, and it is ensured that the surface and center temperature of the rod-shaped material are consistent.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a continuous temperature gradient heat treatment device and method for rod-shaped materials. Background technique [0002] Heat treatment is the process of heating, keeping warm and cooling the material in a certain medium, and controlling its performance by changing the surface or internal structure of the material, which is an extremely important link in the research and application of materials. At present, the conventional research method for the correlation between heat treatment temperature and material structure and performance is to prepare a large number of alloy samples with the same composition, and to achieve this by changing the heat treatment temperature while ensuring the same remaining heat treatment conditions. Although this method is simple and easy to operate, but There are following disadvantages: 1. The sample preparation quantity is large and the expe...

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Problems solved by technology

At present, the conventional research method for the correlation between heat treatment temperature and material structure and performance is to prepare a large number of alloy samples with the same composition, and to achieve this by changing the heat treatment temperature while ensuring the same remaining heat treatment conditions. Although this method is simple and easy to operate, but There are the following disadvantages: 1. The quantity of sample preparation is large and the experiment period is long

Generally, heat treatment experiments need to obtain data at multiple temperature points, so a certain number of samples need to be prepared to meet the requirements; and each sample must go through a complete heat treatment process, so the workload is large and the experiment cycle is long

2. Discretely setting the temperature may not observe the abnormal behavior during the experiment. For example, many metal materials are extremely sensitive to temperature, and slight temperature changes may cause huge changes in phase or structure

However, since the temperature can only be controlled at a single point, the temperature of the sample that deviates from the temperature control point will always fluctuate, which will affect the experimental results

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