Why Is Lab Safety Important

Safety is a priority for any lab work in this course, Material Science. It is important to handle lab equipment safely while performing the task by following all the safety instructions to avoid injury. There are several types of equipment used in this lab including Furnace, Cutting Machine, Hardness Tester, Cold Work, Belt, Disk Grinder, Grinding Strips and Polishing Wheel. By using those materials and equipment, Metallography Sample lab should be performed accordingly and use the knowledge of safety procedure throughout the process. According to the lab safety instruction, all the participant much wear safety glasses with side shield and safety shoes during the lab. The students should also remove any jewelry that can cause an accidental
The Furnace machine which will be used in this lab to heat up material to a required temperature. Second, Cutting Machine is used to cut the material in a specific place or dimension based on the lab procedure. Third, Hardness Tester machine is used to measure the hardness of the material. Fourth, Cold Work machine is used to shape the metal without heating it, basically, it is used to shape cold metal. Fifth, Belt and Disk Grinder are used to do the rough grinding. Sixth, Grinding Strips is used to do fine grinding, and Polishing Wheel that has polishing cloth on it is used to do the
During this process, the operator should be aware that the surface of the machine is hot. The operator should never look down the gam press because it could hit him in the eye if it releases itself. The next step is to do Find Grinding and Polishing. According to the video, the purpose of Metallography Sample Preparation is to have scratch and defect free surface. The first step is to decide where to cut the material regarding microstructure weld and heat affected zone. The next step is to encapsulate the sample in the plastic for grinding and polishing, and then mound the sample for ease of handling and minimizing edges. The sample is put into the mound and lower the ram, and then add molding compound, fasten the top of the ram and add pressure, and set appropriate heat time. In order to get a defect free sample, it is important to remove the scratches and deformation after fine grinding. The operator should do rough polishing with 3 microns polishing compound about 1 inches long, and then add a few drop of extender lubricant. After the mixture of polishing compound and lubricant is ready to use for polishing, the operator should rotate 10 times and then rotate 90° and polish another 10