Mechanical Engineering - Production Engineering - Discussion
Discussion Forum : Production Engineering - Section 2 (Q.No. 16)
16.
Crater wear is predominant in
Discussion:
15 comments Page 1 of 2.
Yash said:
6 years ago
Crater wear occurs due to temperature mainly. And high carbon tool steel withstands the least temperature 250°C. 250°C is too low for diffusion. HSS will withstand 600°C it is also low for diffusion. WC (Tungsten Carbide) tool contains cobalt as a binder which can diffuse as the temperature is 800°C to 900°C. Ceramics are carbide or oxides of metal it will not diffuse.
Qadir said:
8 years ago
The answer given for this question is wrong. Crater wear occurs on rack surface predominantly at high speed and at high speeds temperature is also high which (carbon steel tools) can't withstand.
Neeraj said:
8 years ago
A is the right answer because Crater wear occurs due to more high temperature, and carbon tool steel with Stan at least temperature 290 degrees centigrade.
Vikash said:
9 years ago
But tungsten is good heat dissipation, so diffusion will less and not a predominant in tungsten carbide tool. I think its answer may carbon steel tool.
Pushkar said:
9 years ago
Because there is good chemical affinity b/w carbon in tungsten carbide and steel tool. So diffusion occurs and due to this wear.
Rahul Urkude said:
10 years ago
Crater is formed on the surface of the tool by the action of chip particle flowing over it because of high temperature.
Dixit said:
7 years ago
At high temperature, WC disintegrates to W + C.
The Carbon atom diffuses to workpiece thereby creating a hole/crater.
The Carbon atom diffuses to workpiece thereby creating a hole/crater.
(1)
Akasha said:
7 years ago
Crater wear is usually found while machining brittle materials and tungsten carbide tools favour this phenomenon.
Mayur said:
5 years ago
Crater wear is usually found while machining brittle materials and tungsten carbide tools favour this phenomenon.
Anoop R N said:
1 decade ago
We are taking place on the rake face of the tool like a crater called as crater wear.
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