Qib:20 steel
Txheem:GB / T 699-1999

Cov yam ntxwv
Kev siv yog ib qho siab dua 15 steel, tsis tshua muaj kev kub ntxhov ntawm kev txiav cov tshuab raj thiab cov rauj ua kom zoo nkauj
Cov Steel belongs kom zoo cov roj carbon carbon carbon carbon, txias thiab weldability hardabilized, yas thiab weldile muaj zog ntawm 355-500mpa, elongation tus nqi ntawm 24%
Normalizing tuaj yeem txhawb cov spheridization ntawm cov hlau, kho cov block loj proteutectoid ferrite, thiab txhim kho kev txiav tawm ntawm cov tsis muaj 160 thav
Cov txheej txheem thev naus laus zis ntawm covhlauTuag Qhov Chaw yog: Tus Casting Forging Tuag Tsis Zoo Moulding Recusion Molding Tshuab Tshuab Ntxhua Khaub Ncaws Kev Sib Tsoo Tshuab

Tshuaj Muaj Tshuaj
C: 0.17% ~ 0.24%
SI: 0.17% ~ 0.37%
MN: 0.35% ~ 0.65%
S: 0.035%
P: 0.035%
CR: 0.25%
Ni: 0.25%
CU: 0.25
Cov Cuab Yeej Cuab Yeej Cuab Yeej
Tensile Lub Zog B (MPA): ≥410 (42)
Tos Tawm Lub Zog S (MPA): ≥245 (25)
Elongation 5 (%): ≥25
Kev txo cov cheeb tsam (%): 55 lossis ntau dua
Hardness: Tsis yog cua sov kho, ≤15HB
Qauv loj: Qauv loj: 25mm

Lwm Cov Ntaub Ntawv

Kev Kho Cua Sov: Li Qub, 910 ℃, cua txias.

Metallographic qauv: Ferrite + PETLITITE.
Kev Kho Cua Sovntawm hlau 20 thiab quenching hardness ntawm steel tsis muaj. 20:
Kev kho tshav kub ntawm 20 tus hlau: rau 20 tus hlau, nws muaj peev xwm ua tiav qhov kev ua kom sov li 30-35hrcel
1. Tom qab ntxhib machining, lub workpiece yog quenched raws li tag nrho los ntawm kev kho mob cua sov (920 ℃ cov txheej txheem yuav tsum muaj ntawm kev ua kom zoo ntawm 30, tsis muaj dab tsi ntau tshaj li qhov zoo sab hauv thiab sab nraud lub voj voog, kho lub voj voog.
2. Tib lub tshuab sib tsoo, puab lub qhov saum npoo av lossis tsuas yog cov rooj quenching continay (nyob ntawm qhov loj ntawm qhov chaw ua haujlwm), thiab thaum kawg ua tiav.
3. Carburizing thiab quenching, sib tsoo lub qhov sab hauv thiab qhov tseem ceeb.
Cov txheej txheem ntws yog qhov thib ob, thib peb thiab feem ntau.
● Lub Xeev Lub Xeev: Tus me nyuam nyob rau hauv ib lub xeev ntawm tsis muaj kev kho cua sov lossis kev kho cua sov (analing kub). Yog tias nws tsis tau qhia, kev xa khoom yuav tsum ua yam tsis tauKev Kho Cua Sov.