What's the function of always striking iron with a hammer when striking iron?

When the iron is being struck, the iron is always struck with a hammer to set the shape, and at the same time, the hardness, accuracy and quality of the iron can be improved.

The ancients often said: "It takes hard work to strike while the iron is hot." Another meaning of this sentence is: strike while the iron is hot, and make the iron hard and the steel hard. According to the principle of modern technology, repeated forging can eliminate inclusions, even composition and dense structure, and sometimes refine grains, which is hard. Due to the continuous removal of inclusions, mill scale is constantly produced and shed, so each forging is lighter until it can't be lighter. It is natural and pure, hard and full of rigidity.

In the ancient manual forging, the forging process was a processing method that the metal blank was pressed repeatedly and evenly by hand to make it plastically deformed, so as to obtain a forging with a certain shape, size and mechanical strength. It can be said that in the hands of the old blacksmith, the hard iron can be square, round, long, flat and pointed.

As a raw material, refined iron is interpreted as an iron-carbon alloy with slightly higher carbon content and less inclusions. That is to say, this refined iron is already steel, and the main purpose of refining is to further remove inclusions and dense structures, but the carbon content has not changed significantly before and after refining. ?

However, some people interpret this "refined iron" as wrought iron, so the main purpose of tempering is carburizing into steel. ? Let's not dwell on right and wrong here. But the original steelmaking does refer to the steelmaking method of repeatedly heating, folding and forging soft wrought iron or lump iron with charcoal. Forging removes inclusions, charcoal burns, and carbon particles evenly penetrate into the steel layer, becoming massive carburized steel-original steel. Fold, forge and refine the cast sword repeatedly.

Extended data:

The development of iron smelting industry provides advanced agricultural tools for agriculture, such as shovel, plow, pick, spade, hoe, sickle and knife. At the same time, it saves some labor. It has greatly promoted the development of agriculture and the further intensification of social division of labor.

While promoting the development of agriculture, the iron smelting industry also promotes the further intensification of social division of labor, thus promoting the rapid development of the iron smelting industry, because it can provide sufficient labor force and consumer market for the iron smelting industry.

Therefore, this is a mutually reinforcing function and relationship.

Baidu Encyclopedia-Metallurgical Industry

Baidu encyclopedia-ironware