Manufacturing And Production Technology
Tool life is generally better when

Grain size of the metal is large
Grain size of the metal is small
None of the listed here
Hard constituents are present in the micro-structure of the tool material

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Manufacturing And Production Technology
The strength of a brazed joint

Increases with increase in gap between the two joining surfaces
Increases up to certain gap between the two joining surfaces beyond which it decreases
Decreases with increase in gap between the two joining surfaces
Decreases up to certain gap between the two joining surfaces beyond which it increases

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