Wind chill can never reduce the temperature of an object below the dry bulb temperature of the air, unless that object is wet. In that case evaporation can occur and will result in cooler-than-dry-bulb temps until the water evaporates or until the air reaches 100% humidity.

The only time wind chill has any other effect is if the item in question is producing heat...e.g. a person or a house with the heat on inside. In this case the object will experience greater heat loss as the windspeed goes up. If the object doesn't have an internal heater, then the wind chill will speed cooling until the object reaches the dry bulb temp, and then have no impact.