Okwu nke Hard Alloy (2)

Decarbonization

Mgbe emechara carbide cimented, ọdịnaya carbon ezughị oke.

Mgbe ngwaahịa ahụ mebiri emebi, anụ ahụ na-agbanwe site na WC-Co gaa W2CCo2 ma ọ bụ W3CCo3. Ọdịnaya carbon dị mma nke tungsten carbide na cemented carbide (WC) bụ 6.13% site n'ịdị arọ. Mgbe ọdịnaya carbon dị ntakịrị, a ga-enwe nhazi enweghị carbon na ngwaahịa a. Decarburization na-ebelata ike nke tungsten carbide ciment ma mee ka ọ na-agbaji.

Carburization

Ọ na-ezo aka na oke ikuku carbon mgbe ọ gbasasịrị carbide cimented. Ọdịnaya carbon dị mma nke tungsten carbide na cemented carbide (WC) bụ 6.13% site n'ịdị arọ. Mgbe ọdịnaya carbon dị elu nke ukwuu, nhazi nke carburized akpọpụtara ga-apụta na ngwaahịa ahụ. A ga-enwe oke oke nke carbon efu na ngwaahịa a. Carbon efu na-ebelata ike ma na-eyi nguzogide nke tungsten carbide. Ụdị pores nke C na nchọpụta oge na-egosi ogo nke carburization.

mmanye

Ike mmanye bụ ike ndọta fọdụrụnụ a tụrụ site na iji magnetize ihe ndọta dị na carbide cimented ruo na steeti juru eju wee mebie ya. Enwere mmekọrịta kpọmkwem n'etiti nkezi urughuru nha nke cemented carbide frasi na coercivity. The finer nkezi urughuru size nke magnetized adọ, elu na coercivity uru.

saturation magnetik

Cobalt (Co) bụ magnetik, ebe tungsten carbide (WC), titanium carbide (TiC), na tantalum carbide (TaC) abụghị ihe ndọta. Ya mere, site na ibu ụzọ tụọ uru saturation magnetik nke cobalt n'ime ihe wee jiri ya tụnyere uru kwekọrọ ekwekọ nke ihe nlele cobalt dị ọcha, ebe ọ bụ na ihe ndị na-emepụta ihe na-emetụta saturation magnetik, enwere ike nweta ọkwa alloying nke cobalt-bound phase. . Enwere ike tụọ mgbanwe ọ bụla n'usoro nchikota. Ebe ọ bụ na carbon na-arụ ọrụ dị mkpa n'ịchịkwa ihe mejupụtara ya, enwere ike iji usoro a chọpụta ọdịiche sitere na ọdịnaya carbon dị mma. Ọdịmma saturation magnetik dị ala na-egosi ọdịnaya carbon dị ala yana enwere ike ịmegharị ya. Ụkpụrụ saturation magnetik dị elu na-egosi ọnụnọ nke carbon na carburization efu.

Ọdọ mmiri Cobalt

Mgbe emechara ihe nkedo ọla kọpa (Co) na tungsten carbide, enwere ike imepụta oke cobalt, nke bụ ihe akpọrọ “cobalt pooling”. Nke a bụ n'ihi na n'oge usoro HIP (Pressure Sintering), okpomọkụ na-ekpo ọkụ dị oke ala na ihe onwunwe na-etolite ezughị ezu njupụta, ma ọ bụ pores jupụtara na cobalt. Chọpụta nha ọdọ mmiri cobalt site na atụnyere foto metallographic. Ọnụnọ nke ọdọ mmiri cobalt na carbide cemented na-emetụta nkwụsi ike na ike nke ihe.

Ọ bụrụ na ị nwere mmasị na ngwaahịa tungsten carbide ma chọọ ozi na nkọwa ndị ọzọ, ị nwere ike ịkpọtụrụ anyị site na ekwentị ma ọ bụ mail n'aka ekpe, ma ọ bụ zipu ozi US na ala ibe.