The effects of temperature in the metal working process are as follows:
1. Ductility: When the work temperature is raised, the ductility of the metal increases. This means that the metal becomes more flexible and capable of being stretched or bent without breaking easily.
2. Yield Strength: As the work temperature increases, the yield strength of the metal decreases. Yield strength refers to the point at which a material begins to deform plastically. Lower yield strength allows for easier shaping and forming of the metal.
3. Surface Finish and Dimension Accuracy: Increasing the work temperature can result in a decrease in surface finish and dimension accuracy. This means that the final product may have a rougher surface and may not meet the desired specifications in terms of size and shape.
4. Grain Growth: When temperatures rise too high during heat treatment, unwanted outcomes like grain growth can occur. This can result in metal that is too soft or weak for its intended purpose.
5. Fragility and Cracking: If temperatures fall below the desired range during heat treatment, the finished product may become more fragile and prone to cracking. This can compromise the structural integrity of the metal.
6. Strength, Hardness, Ductility, Toughness, Wear Resistance, Elasticity, and Magnetism: Heat treating can improve or change these properties in metal. For example, heat treatment can increase the strength, hardness, and wear resistance of the metal, while also improving its ductility, toughness, elasticity, and magnetism.
7. Workability and Machinability: Heat treating can improve the manufacturability of metal by removing internal stresses from previous fabrication processes. This allows for easier machining, bending, and forming of the metal.
8. Annealing: Annealing is a heat treatment process that softens the metal, improving its workability and ductility. It involves heating the metal to a suitable temperature and then carefully controlling the cooling process.
9. Atmosphere Control: Temperature control in the metal working process can also affect atmosphere control. For example, in carburizing, if the temperature is not properly controlled, the diffusion of carbon into the metal may be affected, leading to improper case depth and potentially softer parts.
Overall, temperature plays a crucial role in metal working processes as it can significantly impact the properties, workability, and quality of the final product.
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