Traveling Through the Ming Dynasty, I Forged a Knife for Qi Jiguang

Traveling to a world where forging swords is used to judge superiority and inferiority, as a sideline abandoned by the family, Shen Lian silently took out "Metal Science and Heat Treatment". While others were still gambling on their luck with ancestral secret recipes, he was already using the iron-carbon phase diagram to control performance; while others were showing off their skills and honing their skills, he was already observing the martensitic transformation with a microscope. Later, the enemy's heavily armored cavalry approached the city, and the generals in the court were desperate. He just handed over a knife silently: "This knife has a hardness of HRC60, meets the toughness standard, and can break armor." As much as you want, as much as you want. ' Defeating Japanese invaders, casting tripods, and building iron-clad boats allowed the Ming Dynasty to conquer the stars and the sea.