At present, many forging manufacturers use alloy steel for production. One of the alloy steels used by forging manufacturers is titanium alloy forgings. This kind of forging has been sought after in the market this year. Titanium alloy forgings have high hardness and good heat resistance. It is more suitable for high-pressure engineering than other alloys. The main reason why titanium alloy forgings show such good chemical properties is that titanium alloy can produce segregation. So how does the forging manufacturer study the segregation phenomenon. Metallographic analysis is carried out by using the test bar produced by the forging manufacturer. Through the metallographic analysis of the forging manufacturer, it can be found that the bright spots observed by the test bar magnification of the forging manufacturer appear at high magnification β Spot; β The formation of the spot is caused by the segregation of Cr element contained in the raw materials of forging production. The content of Cr element in the segregation area is significantly higher than that in the matrix, resulting in the phase transformation point in the segregation area being lower than that in the matrix; The segregation is mainly concentrated in the middle and upper parts of the test bar of the forging manufacturer.
The forging manufacturer can explain according to the phase diagram of titanium alloy and the solidification theory of alloy. Under normal solidification conditions, the alloy elements of the raw materials used in forging production are not prone to segregation, unless the alloy elements and master alloys are not fully homogenized in the forging process of the forging manufacturer. In addition, the elements and degree of segregation of the test bar of the forging manufacturer determine the actual segregation area β Phase transition temperature.. Therefore, when the forging manufacturer is in the process of hot processing or subsequent heat treatment, the heating temperature is very important.
