Mold steel spark refers to the shape and color of the spark produced when the spark test is carried out on the surface of the die steel. By observing and analyzing the shape and color of the spark, the composition and properties of the die steel can be preliminarily judged, so as to determine its scope of application and use conditions. The characteristics and analysis methods of die steel sparks are described in detail below.
The characteristics of die steel sparks mainly include the shape, color and duration of the sparks. The first is the form of the spark, the die steel spark usually presents the characteristics of fine, uniform and dispersed. The shape of the spark is dotted, linear, star-shaped, arc-shaped, etc., among which point and linear sparks are the most common. The second is the color of the spark, and the color of the die steel spark can be divided into different colors such as red, orange, yellow, white, etc. Different color sparks represent different ingredients and properties. Finally, there is the duration of the spark, which is usually shorter, generally between tens of milliseconds and hundreds of milliseconds.
There are two main methods for the analysis of die steel sparks: observation method and comparative method. The observation method is to preliminarily judge the composition and properties of the die steel by observing the shape and color of the spark with the naked eye. The comparison method is to compare the die steel to be tested with the die steel with known composition and performance, and judge the composition and performance of the die steel to be tested by comparing the spark characteristics of the two.
The specific analysis method is as follows:
Observe the shape of the spark: By observing the shape of the spark with the naked eye, such as point, line, star, arc, etc., the composition and performance of the die steel can be preliminarily judged. For example, a point spark usually represents carbon steel, and a linear spark usually represents alloy steel.
2.Observe the color of the spark: By observing the color of the spark with the naked eye, such as red, orange, yellow, white, etc., you can preliminarily judge the composition and performance of the die steel. For example, a red spark usually indicates a higher carbon content, and an orange spark usually indicates a higher content of alloying elements.
3.Compare spark characteristics: Compare the mold steel to be tested with the mold steel with known composition and properties, and judge the composition and properties of the die steel to be tested by comparing the spark characteristics of the two. For example, if the mold steel to be tested is compared with the mold steel known to be carbon steel, if the spark shape and color of the two are similar, it can be preliminarily judged that the die steel to be tested is also carbon steel.
It should be noted that the analysis method of die steel spark can only be used as the basis for preliminary judgment, and the specific composition and performance need to be further confirmed by chemical analysis and physical property testing. In addition, there may be certain differences in different die steel materials, so the spark test should be analyzed and judged in combination with the specific situation.
To sum up, die steel spark is a method to preliminarily judge the composition and properties of die steel by observing and analyzing the shape and color of the spark. By observing the shape, color and duration of the spark, the composition and properties of the die steel can be preliminarily determined. The analysis methods mainly include observation method and comparison method, which are judged by observing the shape and color of the spark, and comparing the spark characteristics of the die steel to be measured with the known die steel. It should be noted that the analysis method of die steel spark can only be used as the basis for preliminary judgment, and the specific composition and performance need to be further confirmed by other methods.