Kaʻina hana o nā mea hoʻokomo carbide

ʻO ke kaʻina hana o nā ʻāpana carbide cemented ʻaʻole ia e like me ka hoʻolei ʻana a i ʻole ke kila, i hana ʻia e ka hoʻoheheʻe ʻana i ka ʻaila a laila hoʻoheheʻe ʻia i loko o nā mold, a i ʻole ka hana ʻana ma ka forging, akā carbide pauka (tungsten carbide pauka, titanium carbide pauka, tantalum carbide pauka) hehee ke hiki i 3000 °C a oi. pauda, ​​a pela aku) wela a oi aku mamua o 1,000 degere Celsius e hana ai i ka sintered. No ka hoʻoikaika ʻana i kēia paʻa carbide, hoʻohana ʻia ka pauka cobalt ma ke ʻano he mea hoʻopili. Ma lalo o ka hana o ke kiʻekiʻe wela a me ke kiʻekiʻe kiʻekiʻe, e hoʻonui ʻia ka pilina ma waena o ka carbide a me ka pauka cobalt, no laila e hoʻokumu ʻia. Ua kapa ʻia kēia ʻano he sintering. No ka hoʻohana ʻia ʻana o ka pauka, ua kapa ʻia kēia ʻano hana metallurgy pauda.

E like me ke kaʻina hana ʻokoʻa o nā mea hoʻokomo carbide sima, ʻokoʻa ka hakina nui o kēlā me kēia ʻāpana o nā mea hoʻokomo carbide cemented, a ʻokoʻa hoʻi ka hana ʻana o nā mea hoʻokomo carbide cemented.

Hana ʻia ka sintering ma hope o ka hana ʻana. Eia ka hana holoʻokoʻa o ke kaʻina hana sintering:

1) E kaomi i ka pauka tungsten carbide a me ka pauka cobalt e like me ke ʻano i makemake ʻia. I kēia manawa, pili nā mea metala i kekahi i kekahi, akā ʻaʻole paʻa loa ka hui ʻana, a e ʻoki ʻia lākou me ka ikaika iki.

2) I ka piʻi ʻana o ka mahana o nā ʻāpana pauka i hoʻokumu ʻia, e hoʻoikaika mālie ʻia ke degere o ka pilina. Ma ka 700-800 °C, he palupalu loa ka hui pū ʻana o nā ʻāpana, a he nui nā hakahaka ma waena o nā ʻāpana, hiki ke ʻike ʻia ma nā wahi āpau. Kapa ʻia kēia mau hakahaka.

3) Ke piʻi ka mahana wela i ka 900 ~ 1000 ° C, e emi ana nā voids ma waena o nā ʻāpana, ʻaneʻane e nalowale ka ʻāpana ʻeleʻele laina, a ʻo ka hapa ʻeleʻele nui wale nō.

4) Ke hoʻokokoke mālie ka mahana i 1100 ~ 1300 ° C (ʻo ia hoʻi, ka mahana sintering maʻamau), e hoʻemi hou ʻia nā voids, a ʻoi aku ka ikaika o ka hoʻopaʻa ʻana ma waena o nā ʻāpana.

5) Ke hoʻopau ʻia ke kaʻina hana sintering, ʻo nā ʻāpana tungsten carbide i loko o ka lau he mau polygons liʻiliʻi, a hiki ke ʻike ʻia kahi mea keʻokeʻo a puni lākou, ʻo ia ka cobalt. Hoʻokumu ʻia ke ʻano o ka lau sintered ma luna o ka cobalt a uhi ʻia me nā ʻāpana tungsten carbide. ʻO ka nui a me ke ʻano o nā ʻāpana a me ka mānoanoa o ka ʻāpana cobalt ʻokoʻa loa i nā waiwai o nā mea hoʻokomo carbide.