In Newton’s time there was confusion between heat and temperature concept. I was surprised that in this country, more than 300 years later, people often think that heat and temperature are the same thing. 
There exist a fine demarking line between heat and temperature. Heat is the amount of energy in a body while temperature is something that measures the intensity of heat.
The main feature of heat is that it travels from heat region (e.g. the edge) to cooler region (the blade) while temperature raises when heated and falls when cooled.
Heat has the ability to work while temperature can only be used to measure the degree of heat.
The US commonly uses Fahrenheit temperature scale on which water freezes at 32°F and boils at 212°F.
Most of the world uses the Celsius scale on which water freezes at 0°C and boils at 100°C.
The temperature of absolute zero occurs at -460°F or -273°C. Nobody has touched the temperature of absolute zero.
Very small amount of heat generated during grinding can cause very large temperature increase provided the heat is transferred to a very small segment of the edge. The flash heating/temperature occurs during micro-second of time and the size of the heated edge segment may be as small as one micro-meter.
At the microscopic scale we have to rely on information provided by suitable sensitive instruments.
Jan
There exist a fine demarking line between heat and temperature. Heat is the amount of energy in a body while temperature is something that measures the intensity of heat.
The main feature of heat is that it travels from heat region (e.g. the edge) to cooler region (the blade) while temperature raises when heated and falls when cooled.
Heat has the ability to work while temperature can only be used to measure the degree of heat.
The US commonly uses Fahrenheit temperature scale on which water freezes at 32°F and boils at 212°F.
Most of the world uses the Celsius scale on which water freezes at 0°C and boils at 100°C.
The temperature of absolute zero occurs at -460°F or -273°C. Nobody has touched the temperature of absolute zero.
Very small amount of heat generated during grinding can cause very large temperature increase provided the heat is transferred to a very small segment of the edge. The flash heating/temperature occurs during micro-second of time and the size of the heated edge segment may be as small as one micro-meter.
At the microscopic scale we have to rely on information provided by suitable sensitive instruments.
Jan