Labor Bulletin No. 132
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— The operator in charge of an annealing furnace is called an annealer. Annealing is the continued heating of metal at some tem- perature below its melting point, with the object of removing its brittle- ness and rendering it tough and more or less elastic and resistant to shock. The working of iron and steel, etc., by hammering, bending, rolling, drawing, and similar operations tends to harden them and make them brittle. When this occurs the original properties are restored by anneahng. The su...ccess of annealing depends upon the judgment and skill of the furnace operator because he places the specified charge of WAGES AND HOURS — METAL TRADES. PT. III. 41 metal in the furnace, regulates the flow and composition of hot gases, and determines when the metal has been uniformly and thoroughly heated.
The rate of heating or the bringing of the whole mass evenly up to the proper temperature is very important. Metal can absorb heat at a defi- nite rate. By firing the furnace too hard, the outside of the mass of metal is apt to become overheated, while the center is comparatively cold.
What to read after Labor Bulletin No. 132?
You can find similar books in the "Read Also" column, or choose other free books by Massachusetts. Bureau of Statistics to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
— The operator in charge of an annealing furnace is called an annealer. Annealing is the continued heating of metal at some tem- perature below its melting point, with the object of removing its brittle- ness and rendering it tough and more or less elastic and resistant to shock. The working of iron and steel, etc., by hammering, bending, rolling, drawing, and similar operations tends to harden them and make them brittle. When this occurs the original properties are restored by anneahng. The su...ccess of annealing depends upon the judgment and skill of the furnace operator because he places the specified charge of WAGES AND HOURS — METAL TRADES. PT. III. 41 metal in the furnace, regulates the flow and composition of hot gases, and determines when the metal has been uniformly and thoroughly heated.
The rate of heating or the bringing of the whole mass evenly up to the proper temperature is very important. Metal can absorb heat at a defi- nite rate. By firing the furnace too hard, the outside of the mass of metal is apt to become overheated, while the center is comparatively cold.
What to read after Labor Bulletin No. 132?
You can find similar books in the "Read Also" column, or choose other free books by Massachusetts. Bureau of Statistics to read onlineMoreLess
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