Slag Content Test
Slag content test, also called slag ball test, is a method used to determine the amount of slag ball in steel. Slag balls are the particles that are formed due to the local melting of slag entrained in the steel during the production process. Slag balls cause an increase in steel’s toughness and mechanical properties, but their presence also gives steel a negative visual appearance. The slag content has a significant influence on the performance and aesthetic of the steel. Therefore, it is important to measure the slag content and make sure its levels are within the specifications.
The slag content is determined using a test method which is conducted using a microscope. During the test, a steel sample is placed on the microscope stage and examined. Slag balls are then identified based on their size and shape. Once the count of slag balls is completed, their combined volume is measured. Then, the total volume of slag ball (in mm3) is multiplied by 14.2 to find the slag content in the sample (in wt-%).
This test is important for steel producers in order to maintain the quality of the steel and to ensure that it meets the desired specification. The results from the test can be used to make necessary adjustments in the steel production process in order to reduce or eliminate slag ball formation.
There are a few variables that must be taken into account when conducting the test. The microscope should have a magnification of at least 100x and the illumination should be adjusted so that the observer can get a clear view of the sample. It is also important that the test is conducted by experienced personnel in order to obtain accurate results.
In order to ensure the accuracy of the results, the test should be conducted at least twice on different samples. The slag content test is a low cost, easy to use procedure which is essential to monitor and maintain the quality of steel products.
