Dab tsi yog qee cov qauv kev sib txawv rau kev kuaj cov khoom lag luam yooj yim embrittlementance?

Cov Qauv Txheej Txheem rau kev sim cov khoom lag luam me ntsis embrittlement kuj tseem ceeb tshaj plaws rau cov khoom siv sib zog, thiab cov qauv kev ruaj ntseg ntawm cov ntaub ntawv hauv qis {{0} {} {}}}} qhov chaw ib puag ncig. Hauv qab no yog cov qauv tseem ceeb thiab lawv cov ntsiab lus:

1. ASTM D256 (AMERICANCE LUB CEV RAU LUB CAIJ RAU TESTING THIAB COV NTAUB NTAWV TSHWJ XEEB)
Kuaj Hom: Yooj yimuam yooj yim kev sim siab lub zog kuaj.
Core Content: A caster material specimen (notched or unnotched) is placed at a specified low temperature (e.g., -20°C, -40°C) for at least 4 hours. A pendulum is then applied to the specimen, and the energy absorbed at fracture is measured (kJ/m²). The acceptance standard for embrittlement resistance is typically an impact strength of >5 KJ / M² rau cov hnoos qeev tsis muaj qhov tsis pom kev.

2. ISO 179 (Lub Koom Haum thoob ntiaj teb rau cov qauv txheem)
Kuaj Hom: Izod Beam cuam tshuam kev xeem.
Cov ntsiab lus tseem ceeb: Kev cuam tshuam yog thov rau cov hnoos qeev ntawm cov khoom siv kub tsis tshua muaj kub, thiab lub zog nqus ib cheeb tsam yog xam. Qhov no yog siv los ntsuas cov khoom siv tiv thaiv kom tawg kom tawg ntawm qhov kub tsawg. Cov kev tseev kom muaj xws li muaj lub zog cuam tshuam ntau dua lossis sib npaug ntawm 4 tus KJ / M² ntawm -30 degree, tsis muaj nkig pob txha lov rau ntawm qhov pob txha lov.

3. GB / T 1843 (Tuam Tshoj Lub Tebchaws Lub Tebchaws)
Test hom: Yas Izod Beam cuam tshuam kev sim txujci.
Cov ntsiab lus tseem ceeb: Simulates tsawg - kev kub ntxhov (piv txwv li -10 degree) los ntawm kev cuam tshuam cov quav nrog ib tug pendulum. Hom tsis ua hauj lwm (ductile bacture / britle bacture) thiab cuam tshuam lub zog yog sau cia. Cov ntaub ntawv tiv taus embrittlement yuav yuav yuav tsum tau ua kom pom lub zog tawg nrog ib qho kev cuam tshuam lub zog txo qis dua lossis sib npaug txog 30%.

4. Tsawg - kub khoov ntsuas (cov qauv kev lag luam)
Cov ntsiab lus xeem: Tom qab cov khoom raug tso cai sawv ntsug ntawm qhov kub tsawg rau 24 teev, 900℃khoov tau los soj ntsuam rau kev tawg lossis tawg. Txhawm rau kom dhau los, tsis pom cov kab nrib pleb yuav tsum tau pom, thiab cov qauv kev ncaj ncees yuav tsum raug tswj.

Cov qauv kev tshawb fawb no ntsuas qhov qis -} Kub cov khoom siv lub zog, thiab cov qauv ruaj khov, muab ib qho kev ruaj khov ruaj khov, muab ib qho kev ruaj khov ruaj khov, muab ib qho kev ruaj khov ruaj khov, muab ib qho kev ruaj khov ruaj khov, muab ib qho kev ruaj khov ruaj khov, muab kev ruaj khov.