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Chen engineer, with incredible vision at Kou Shao, I thought this read "by the" easy "six arts practitioners how could so understand the art of casting knife. Chen engineer, carefully answer: it is ~! After that switch to animal urine and oil quenching! Kou Shao said: steel the law to use irrigation casting knife, quenching is necessary to use this method! Animal urine and animal fats as a cooling medium, made great contributions wholesale jordan shoes country's Northern and Southern Dynasties famous metallurgical Qi Wu Huai Wen jordan outlet country steelmaking process.

This is a significant improvement on the steel hardening process,jordan shoes for sale, on the one hand to expand the scope of the quenching medium, different cooling rates can be obtained on the other hand, to obtain different properties of the steel. In the cooling rate of the animal urine and quenching, and then quenched in a small cooling speed of the animal fats and oils, which can be obtained relatively good performance of steel, to avoid the simple use of a quenching medium quenching. Because only with a quenching medium, after all, difficult to kill two birds with one stone, if you are using quenching medium cooling rate is relatively fast, it is easy to cause the workpiece cracking, deformation and other defects; quenching medium cooling rate is slow, it will make more than the toughness of the workpiece, hardness, it is difficult to meet the requirements of use.

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