Okwu okwu nke hard alloy(1)

Iji kwalite nghọta nke akụkọ na ihe odide teknụzụ gbasara hard alloy, hazie okwu okwu, ma kọwaa ihe okwu teknụzụ pụtara n'isiokwu, anyị nọ ebe a ịmụta usoro nke alloy siri ike.

Tungsten Carbide

Tungsten carbide na-ezo aka na ihe ndị nwere agba agba nke nwere carbides metal refractory na ihe nkedo ígwè. N'ime carbides metal a na-eji ugbu a, tungsten carbide (WC), titanium carbide (TiC), na tantalum carbide (TaC) bụ ihe ndị a na-ahụkarị. A na-eji ígwè cobalt eme ihe n'ọtụtụ ebe na mmepụta carbide cimented dị ka ihe nkedo. Maka ụfọdụ ngwa pụrụ iche, a pụkwara iji ihe nkedo ígwè dị ka nickel (Ni) na ígwè (Fe) mee ihe.

Njupụta

Njupụta na-ezo aka na oke-na-olu nke ihe ahụ, nke a na-akpọkwa ike ndọda. Olu ya nwekwara oke nke pores na ihe. Tungsten carbide (WC) nwere njupụta nke 15.7 g/cm³ na cobalt (Co) nwere njupụta nke 8.9 g/cm³. Ya mere, ka ọdịnaya cobalt (Co) na tungsten-cobalt alloys (WC-Co) na-ebelata, njupụta n'ozuzu ga-abawanye. Ọ bụ ezie na njupụta nke titanium carbide (TiC) dị obere karịa nke tungsten carbide, ọ bụ naanị 4.9 g / cm3. Ọ bụrụ na agbakwunyere TiC ma ọ bụ ihe ndị ọzọ na-adịchaghị obere, njupụta n'ozuzu ga-ebelata. Na ụfọdụ ihe mejupụtara kemịkalụ nke ihe ahụ, mmụba nke pores na ihe onwunwe na-ebute mbelata njupụta.

Isi ike

Isi ike na-ezo aka n'ikike nke ihe nwere ike iguzogide nrụrụ rọba.

Vickers hardness (HV) bụ nke a na-ejikarị mba ụwa. Usoro nha ike nke a na-ezo aka na uru siri ike enwetara site na iji diamond iji banye n'elu ihe nlele iji tụọ nha ntinye n'okpuru ọnọdụ ibu. Rockwell hardness (HRA) bụ usoro nha ike nke ọzọ a na-ejikarị. Ọ na-eji omimi ntinye nke cone diamond ọkọlọtọ iji tụọ ike. Ma Vickers hardness na Rockwell hardness nwere ike iji maka nha siri ike nke carbide cimented, na abụọ nwere ike ịtụgharị n'ime ibe ha.

Ike na-ehulata

A na-akpọkwa ike na-ehulata dị ka ike mgbawa transverse ma ọ bụ ike mgbanwe. A na-agbakwunye alloys siri ike dị ka ogwe nkwado dị mfe na pivots abụọ, mgbe ahụ, a na-etinye ibu na etiti nke abụọ pivots ruo mgbe mgbawa siri ike. A na-eji ụkpụrụ ndị a gbakọrọ site na usoro ntụgharị maka ibu a chọrọ iji mebie, na mpaghara obe nke ihe atụ. Na tungsten-cobalt alloys (WC-Co), ike mgbanwe na-abawanye na cobalt (Co) ọdịnaya na tungsten-cobalt alloys, ma ike mgbanwe na-erute kacha mgbe cobalt (Co) ọdịnaya ruru ihe dị ka 15%. A na-atụ ike mgbanwe site na nkezi ọtụtụ nha. Uru a ga-adịkwa iche na geometry nke ihe atụ, ọnọdụ elu (ịdị nro), nrụgide dị n'ime, na ntụpọ dị n'ime ihe. Ya mere, ike na-agbanwe agbanwe bụ naanị ihe atụ nke ike, na ụkpụrụ ike na-agbanwe agbanwe enweghị ike iji mee ihe ndabere maka nhọrọ ihe.

Porosity

A na-emepụta carbide cimented site na ntụ ntụ ntụ ntụ site na ịpị na sintering. N'ihi ọdịdị nke usoro ahụ, ọnụọgụ porosity nwere ike ịdịgide na nhazi ọla nke ngwaahịa ahụ.

Mbelata nke porosity nwere ike imeziwanye arụmọrụ zuru oke nke ngwaahịa ahụ. Usoro sintering nrụgide bụ ụzọ dị irè iji belata porosity.