About SATSUTA TOSHITAKA
About 神奈川県産技セ
About hot working
About high alloy steel
About medium carbon alloy steel
About building up
About repair welding
About preheating
About postheating
About tempering
About characteristic
About macrostructure
About hardness
About metal structure(microstructure)
About martensite
About retained austenite
About carbide
About impact strength
About mechanical property
About die steel
About hot crack
About welded heat affected zone
About weld metal
About tool steel
About SKD61
About heat check
About 熱間工具鋼
About Transformation structures,work structures
About Mechanical properties
About Weld zone
About 工具鋼
About SKD61
About 補修溶接