Exam Question
(a) Describe required properties of cutting tools. (8)
(b) Describe materials used for making cutting tools. (8)
Class 4 (4th Engineer)
MEP
📅 Apr 2023
Reference Answer
### (a) Required Properties of Cutting Tools
A cutting tool's effectiveness and lifespan are determined by a combination of physical and mechanical properties. To achieve optimal performance in a marine workshop environment, a cutting tool must possess the following characteristics:
1. **Hot Hardness (or Red Hardness)**:
* **Definition**: The ability of the tool material to retain its cutting edge hardness and strength at the high temperatures generated at the tool-chip interface during machining.
A cutting tool's effectiveness and lifespan are determined by a combination of physical and mechanical properties. To achieve optimal performance in a marine workshop environment, a cutting tool must possess the following characteristics:
1. **Hot Hardness (or Red Hardness)**:
* **Definition**: The ability of the tool material to retain its cutting edge hardness and strength at the high temperatures generated at the tool-chip interface during machining.
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