Ki jan kontni enklizyon yo (jan ASTM E45 mezire, tip A kont tip C) nan yon Tib chofaj Titàn Klas 2 Korele ak Dansite Pitting nan yon solisyon Bwòm 0.5% nan 50 degre?

In grade 2 titanium, pitting initiation sites are inclusions, especially Ti₂Fe particles. Inclusions are classified by kind according to ASTM E45 as follows: kind A (sulphides, rare in titanium), Type B (aluminates), Type C (silicates), and Type D (globular oxides). In titanium, the most prevalent and most harmful inclusions are iron-rich (Type D). The pitting density in the bromine solutions increases with the increase of the inclusion concentration. A severe inclusion rating (E45 rating >2) mennen nan yon dansite pitting 5-10 × pi wo pase yon materyèl pwòp (E45 Rating<1).

Pitting Density vs Enklizyon Rating (Kantitatif)

Nan 0.5% Br 2 nan 50 C pou 500 èdtan

ASTM E45 Evalyasyon enklizyon Ti₂Fe Dansite patikil (patikil/mm²) Dansite twou (twou/cm²) Pwofondè maksimòm twou (µm)<0.5 (extremely clean) <50 5–20 20–50
0.5-1.0 (pwòp) 50-150 20-60 40-100
1.0-1.5 (modere) 150-300 50-150 80-180
1.5-2.0 (mod-heavy) 300-600 100-300 120-250 >2.0 (heavy) >600 200-500 200-400
Gravite Pitting vs Kalite Enklizyon

Kalite Enklizyon (ASTM E45)Titàn Pitting Gravite (relatif) Tipik
Kalite A (sulfid) Ba Trè ra
Kalite B (Aluminate) (1) Ba Ra
Kalite C (silikat) Okazyonèlman modere
Kalite D (oksid globilè/Fe-rich) Gid komen pou kontwòl segondè enklizyon

Dansite Pitting obligatwa (twou/cm2) Maksimòm ASTM E45 Rating Rekòmande Faktori 20 0.5 VAR k ap fonn (refonn vakyòm arc)
20-50 <1.0 Double VAR
50-100 <1.5 Single VAR plus clean feedstock >100 >2.0 Pa rekòmande pou sèvis Br2
Pwopozisyon Jeni

Sèvis brom nan 50 degre: tib Titàn ak klas enklizyon ASTM E45<1.0 (clean). Use of double vacuum arc remelted (VAR) material for lowest content of inclusions. The engineer controls the inclusion content to lessen the pitting density in harsh bromine solutions.