ASTM P20 plus Ni 718H Yas Mould Steel Phaj

718H pwm hlau tau tsim los ntxiv cov qauv pwm hlau kom tshem tawm cov teeb meem xws li kev poob qis ntawm qhov nruab nrab ntawm cov pwm, maching teeb meem thiab tsis txaus etch-grainability nrog qhov loj ntawm ntau tshaj 400mm hauv ntu ntu. Ib kauj ruam tseem ceeb ntawm kev daws cov teeb meem no yog txhawm rau txhim kho hardenability los ntawm alloying kwv yees li 1 feem pua ​​​​nickel.

718 steel sib npaug qib:

718 steel Chemical compositions (feem pua):

718 Pwm Steel Mechanical Properties:

Kev kho cua sov

Annealing:

Tshav kub rau 710 ~ 740 degree, nrog tuav ntawm qhov tsawg kawg nkaus rau 3 teev.

Lub qhov cub qeeb qeeb kom txias txog 600 degree

Stress relieving:

Yuav tsum tau nqa tawm tom qab machining thiab ua ntej kev kho cua sov zaum kawg.

Kub rau 530 ~ 580 degree rau 2 teev.

Hardening:

Preheating rau 500 ~ 550 degree;

- Austenitizing ntawm 840 ~ 880 degree

- Roj los yog thermal da dej txias ntawm 200 ~ 300 degree, ces roj txias raws li cov hlau zoo thiab loj.

Quenched hardness: HRC 52 ~ 54

Tempering:

Yuav tsum tau nqa tawm tom qab hardening thiab thaum cov hlau nyob ntawm 60 ~ 80 degree, ntawm 500 ~ 600 degree raws li qhov xav tau

hardness thiab ruaj khov rau tsawg kawg 2 teev; cua txias hauv huab cua.

Daim ntawv thov:

Nws nta zoo heev hardening penetration, zoo workability, polishing thiab photoengraving zog. Cov hlau no yog siv rau yas pwm ntawm nruab nrab thiab loj loj. Nws tuaj yeem raug kho nrog nitriding los txhim kho nws qhov hnav tsis kam. Txhaj thiab thermoplastic extrusion pwm, roj hmab pwm, pwm cab cab, ntim.