Hanyar Gwajin Injini don Cast Takalmin Birkin Ƙarfe da Ake Amfani da shi a Hannun Juyawa (Zaɓin Takalma na Gwajin Taurin)

Zaɓin kayan gwajin injina don takalman birki na simintin ƙarfe zai dace da ma'auni: ICS 45.060.20. Wannan ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun kayan aikin ya kasu kashi biyu:

1.Tsarin Gwaji

Za a aiwatar da shi daidai da tanadi na ISO 6892-1: 2019. Girman da ingancin sarrafa samfuran tensile zai dace da buƙatun ISO 185: 2005.

2.Hanyar Gwajin Hardness

Za a aiwatar da shi daidai da ISO 6506-1: 2014. Za a yanke samfurori masu taurin daga ƙananan rabin mashin gwajin simintin simintin gyare-gyare; idan babu gwajin gwaji, za a ɗauki takalmin birki ɗaya, 6mm - 10mm za a tsara shi daga gefensa, kuma za a auna taurin a wuraren gwaji 4, tare da matsakaicin ƙimar shine sakamakon gwajin.

Tushen Hanyar Gwajin Tauri

TS EN ISO 6506-1 Kayayyakin Karfe - Gwajin taurin Brinell - Kashi 1: Hanyar Gwaji - Ka'idodin, alamomi da bayani, kayan gwaji, samfuran, hanyoyin gwaji, rashin tabbas na sakamako da rahoton gwaji don gwajin taurin Brinell na kayan ƙarfe.

2.1 Zaɓin Kayan Gwaji: Gwajin Brinell Hardness (An Ba da Shawarar Farko)

Abũbuwan amfãni: Wurin shigar da shi yana da girma, wanda zai iya nuna taurin ƙarfe na simintin ƙarfe gabaɗaya (ƙarfe na iya samun tsari mara daidaituwa), kuma sakamakon ya fi wakilci.

Ya dace da matsakaici da ƙananan taurin simintin ƙarfe (HB 80 - 450), wanda ke rufe cikakken kewayon taurin takalmin simintin ƙarfe.

Aikin yana da sauƙi mai sauƙi, kuma abin da ake buƙata don ƙarewar samfurin yana da ƙananan ƙananan (yawanci Ra 1.6 - 6.3μm ya isa).

2.2 Ka'idar Gwajin taurin Brinell

Ana iya taƙaita ƙa'idar kamar haka: Ƙwallon allo mai wuya (ko ƙwanƙarar ƙwallon ƙarfe) tare da diamita na 10mm an danna shi a cikin saman samfurin a ƙarƙashin wani ƙarfin gwaji (kamar 3000kgf). Bayan auna diamita na shigarwa, ana ƙididdige ƙimar taurin (HBW) don siffanta ƙarfin kayan don tsayayya da nakasar filastik. Babban fa'idarsa ya ta'allaka ne a cikin wakilci mai ƙarfi na sakamakon, wanda zai iya nuna halayen taurin macroscopic na kayan. Hanya ce ta gargajiya da aka yi amfani da ita sosai wajen gwada kayan aikin ƙarfe.

2.3 Alamu da Bayanin ƙimar Brinell Hardness

Babban ma'anar ƙimar taurin Brinell (HBW) ita ce: rabon ƙarfin gwajin (F) zuwa wurin indentation (A), tare da naúrar MPa (amma yawanci ba a yiwa naúrar alama ba, kuma ana amfani da ƙimar lambobi kawai). Tsarin lissafin shine kamar haka:HBW=πD(D-D2−d2)2×0.102×F
Inda:

F shine ƙarfin gwajin (raka'a: N);

D shine diamita na indenter (naúrar: mm);

d shine matsakaicin diamita na indentation (naúrar: mm);

Matsakaicin “0.102″ shine juzu'in juzu'i da ake amfani dashi don juyar da rukunin ƙarfin gwaji daga kgf zuwa N (idan an ƙididdige shi kai tsaye a cikin N, za'a iya sauƙaƙe tsarin).

Ana iya gani daga dabarar cewa a ƙarƙashin ƙarfin gwajin guda ɗaya da diamita na indenter, ƙaramin diamita na ciki, ƙarfin ƙarfin kayan don tsayayya da nakasar filastik, kuma mafi girman ƙimar taurin Brinell; Sabanin haka, ƙananan ƙimar taurin.

Dangane da sifofin kayan simintin gyaran ƙarfe na simintin ƙarfe (ƙarfe simintin ƙarfe), sigogin gwajin taurin Brinell yawanci kamar haka:

Ƙarfin gwaji (F): Gabaɗaya, 3000kgf (29.42kN) ana amfani da shi, kuma madaidaicin alamar taurin shine “HBW 10/3000″.

Lura: Idan samfurin yana da bakin ciki ko kayan yana da laushi, ana iya daidaita ƙarfin gwajin (kamar 1500kgf ko 500kgf) daidai da ISO 6506-1: 2014, amma wannan za a nuna a cikin rahoton gwajin.