Matsayin Black Oxide Ƙarshen Ƙarshen Ƙarshe 

Darasi 8.8 baki oxide biyu-karshen studs matsakaita ne masu ƙarfi masu zaren zaren ɗamara waɗanda ke nuna zaren zare a ƙarshen duka tare da cibiyar shank mara zare. Suna haɗuwa da ingantaccen aikin injiniya (ƙarfin 800 MPa), kariyar lalata tattalin arziƙi ta hanyar fenti mai jujjuyawar Fe3O4 na bakin ciki, da ingantacciyar shigarwa don injunan masana'antu, motoci, da aikace-aikacen tsari.

1. Matsayi 8.8 Rabewa

Dangane da ISO 898-1, ƙirar "8.8" tana nufin ƙarfin tensile na ƙima na 800 MPa da rabon amfanin ƙasa na 0.8 (ƙarfin amfanin ƙasa 640 MPa). An ƙera shi daga matsakaicin ƙarfe mai ƙarancin ƙarfi da zafin jiki, Grade 8.8 yana ba da ma'aunin ƙarfi-zuwa tsada.

Tebur 1 - Maɓalli Maɓalli na Injini (ISO 898-1)

2. Black Oxide Surface Jiyya

Black oxide (Fe3O4) shine rufin jujjuya sinadarai mai kauri 0.5-1.5 micrometers, wanda aka kafa ta hanyar nutsewa a cikin wanka mai zafi na alkaline nitrate a 140-150C. Ba kamar electroplating ba, ba ya haifar da canji mai girma kuma babu haɓakar hydrogen. Lokacin da aka rufe shi da mai na rigakafin tsatsa, yana ba da juriya na feshin gishiri har zuwa awanni 96.

Table 2 - Black Oxide Coating Properties

3. Ƙarshen Ƙarshen Ƙarshen Ƙarshe

Ƙarshen ƙarewa biyu yana da ƙarshen famfo (wanda aka lanƙwasa cikin rami da aka taɓa) da ƙarshen goro (yana karɓar goro), wanda ba a zare shi ba. Tsawon ƙarshen famfo yawanci 1.0-1.5d kuma ƙarshen goro 2.0-3.0d, inda d shine diamita na ƙima.