hat
4. vis la ak barik, te fè nan 38CrMoAlA, yo te fè a smithing, revenu, doub aje, tretman nitrurasyon. Diferans nan men lòt moun: se Plimen kwen apeze apre fini ki graj ak bon kapasite Harden, ak doub aje diminye efikasite estrès. Pandan se tan, nan pwosesis egzat, faz ki genyen nan bor yo vis gen ti erè. Barik la ak vis gen gwo pwopriyete inivèsèl. Estrikti a nan vis se diferan nan diferan materyèl yo.
eng
4. The screw and barrel, made of 38CrMoAlA, are made through smithing, tempering, double aging, nitriding treatment. Differences from others: Screw edge is tempered after rough finish with good harden ability, and double aging reduce efficiently stress. Meanwhile, through accurate processing, phases of the screw edges have small error. The barrel and screw have high universal property. The structure of screw is different to different materials.