Manganese yog ib qho tseem ceeb tshaj plaws hauv Q345NH, nrogmuaj zog thiab feem ntau muaj txiaj ntsig zoontawm ob lub zog thiab qis-kub toughness.
1. Qhov cuam tshuam rau lub zog
Mn yog tus muaj zogsolid-solution ntxiv zoguas nce ob qho tib si tawm los thiab lub zog tensile.
Raws li Mn cov ntsiab lus nce nyob rau hauv tus qauv ntau (0.70–1.50%), lub zog nce tsis tu ncua.
Nws tso cai rau Q345NH mus txog qhov xav tau345 MPa yield zogtsis xav tau cov pa roj carbon ntau, uas khaws cov weldability.
2. cuam tshuam rau Toughness (tshwj xeeb tshaj yog qhov kub thiab txias cuam tshuam toughness)
Qhov tseem ceeb txhim kho qhov kub thiab txias toughnesslos ntawm refining ferrite nplej thiab txo cov ductile-brittle hloov kub.
Mn ua ke nrog cov piam thaj tsis zoo los ua MnS suav nrog, tiv thaiv FeS-induced brittleness thiab cracking.
Nyob rau hauv tus txheej txheem ntau yam,siab dua Mn feem ntau txhais tau tias zoo dua toughness.
Only at excessively high levels (>1.6%) puas Mn pib degrade toughness los ntawm kev txhawb cov qauv banded thiab nce hardenability.
3. Zuag qhia tag nrho cov nyiaj tshuav hauv Q345NH
Cov ntsiab lus Mn tau ua tib zoo tswj rau:
Muab lub zog txaus kom tau raws li qib Q345
Ua kom muaj kev ua haujlwm zoo ntawm qhov kub thiab txias
Ua kom zoo weldability thiab formability
