Ubufatanye
UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Carbon Steel Strip: Saw Plate Sheared and Annealed Soft
Thin carbon steel strip, soft enough to punch, file and score: the stock for utility-knife blades, hacksaw blades and hole saws, which are hardened only after they are shaped. Start from crucible steel rolled to gauge, cut it into strips with plate shears, then anneal it the way Harcourt's Elementary Forge Practice (1920) gives for tool steel: cherry red, about 1400 °F, and buried in perfectly dry ashes until cold.
Cutting strips instead of saw outlines and the file test are ours. The picture is our drawing.
Utangiye
1 day (cooling overnight)
Amabwiriza
1
1
Roll the plate
Roll the plate
Roll crucible steel to the gauge the blades need, as in this blueprint. Stop before the saw outlines are sheared.
2
2
Mark the strips
Mark the strips
Scribe lines along the plate, one strip width apart. The width is whatever the blades need (ours).
Ibikoresho by'iyi ntambwe:
Isahani y'icyuma cy'ubugi bw'igisatuzo1 igiceIbikoresho bikenewe:
Igikoresho Gishushanya Imirongo
Agapimo kagororotse3
3
Shear into strips
Shear into strips
Cut along the lines with plate shears, as Grimshaw's saw plates are cut to outline after rolling.
Ibikoresho bikenewe:
Imikasi y'amasahani y'icyuma4
4
Fill a bucket with dry ash
Fill a bucket with dry ash
Fill an iron bucket with ashes. They must be perfectly dry, so they conduct heat poorly and the steel cools slowly. Dry slaked lime also works.
Ibikoresho bikenewe:
Ivu ry'Igiti Gikomeye
Ibakuli ry'icyuma5
5
Heat to cherry red
Heat to cherry red
Heat the strips evenly in the forge to a cherry red, about 1400 °F (760 °C). No hotter: overheated steel goes coarse in the grain and weak.
Ibikoresho bikenewe:
Uruganda rw'umucuzi
Amafashi y'umucuzi
Uturindantoki two gukomeza ibyuma6
6
Bury and leave until cold
Bury and leave until cold
Bury the strips in the ash at once and leave them until they are entirely cold, overnight. The slower they cool, the softer they are.
Ibikoresho bikenewe:
Amafashi y'umucuziIbakuli ry'icyumaUturindantoki two gukomeza ibyuma7
7
Check it is soft
Check it is soft
Brush off the ash and stroke a corner with a file: it should bite easily. If it skates, anneal again (our test).
Ibikoresho bikenewe:
Ikariso ry'IcyumaIbikoresho
1- Umwanya
Ibikoresho bikenewe
9- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
Blueprint zijyanye
Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame
CC0 Umurenge rusange
Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.
Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.