42CrMo alloy steel pipe emeputa akwụkwọ ikike ire ahịa
Ebumnuche nke ọkpọkọ igwe anaghị agba nchara 42CrMo: nchara pụrụ iche maka àkwà mmiri bụ "42CrMo", nchara pụrụ iche maka girder ụgbọ ala bụ "42CrMo", na ígwè pụrụ iche maka ụgbọ mmiri bụ "42CrMo". Ụdị nchara a na-eme ka ihe eji arụ ọrụ nke ígwè dị mma site n'ịgbanwe ọdịnaya carbon (c). Ya mere, dị ka carbon ọdịnaya, ụdị ígwè a nwere ike kewaa n'ime: obere carbon ígwè - carbon ọdịnaya bụ n'ozuzu ihe na-erughị 0,25%, dị ka 10 na 20 ígwè; Ọkara carbon ígwè - carbon ọdịnaya bụ n'ozuzu n'etiti 0.25 ~ 0.60%, dị ka 35 na 45 ígwè; Igwe carbon dị elu - ọdịnaya carbon na-adịkarị karịa 0.60%. A naghị ejikarị ụdị ígwè a eme ihe na-emepụta ọkpọkọ ígwè. 42CrMo steel bụ igwe siri ike dị elu nke nwere ike dị elu na ịdị ike, ike siri ike, enweghị oke iwe ọkụ, oke ike ọgwụgwụ na ọtụtụ nguzogide mmetụta mgbe emenyụ na ọgwụgwọ iwe, yana ezigbo mmetụta ike dị ala. 42CrMo ígwè dabara adaba maka imepụta nnukwu plastik na ọkara na-achọ ụfọdụ ike na ike. Isi ike: annealed, 147 ~ 241hb, 42CrMo
Ike tensile σ b (MPa): ≥1080(110)
Ike mpụta σ s (MPa): ≥930(95)
Mgbatị δ 5 (%): ≥12
Mbelata mpaghara ψ (%): ≥45
Mmetụta ike Akv (J): ≥ 63
Mmetụta ike ike α kv (J/cm2): ≥78(8)
Ike: ≤ 217hb
Iji mee ka ndụ ọrụ nke ndị nwụrụ anwụ dịkwuo mma karịa ugboro 800000, a na-emejuputa usoro siri ike nke nkwụsịtụ na okpomọkụ dị ala maka ígwè na-esi ike. N'oge quenching, ọ ga-preheated na 500-600 ℃ 2-4 awa, wee na-na 850-880 ℃ ruo oge ụfọdụ (ọbụlagodi 2 awa), mma na mmanụ ka 50-100 ℃ na mma site ikuku. Isi ike mgbe emenyụchara nwere ike iru 50-52hrc. Iji gbochie mgbawa, a ga-ekpo ọkụ na 200 ℃ ozugbo. Mgbe iwe were ọkụ, enwere ike idowe ike ahụ karịa 48hrc. Usoro ọgwụgwọ ịsa ahụ nnu na-anọpụ iche nke 42CrMo steel. Enwere ike nweta oyi akwa carbide site na ọgwụgwọ ịsa ahụ nnu na-anọpụ iche nke ígwè 42CrMo.
1. Carbon vanadium compound, na carburized oyi akwa nwere otu Ọdịdị, ezi continuity na compactness, edo ọkpụrụkpụ, kọmpat Ọdịdị, elu microhardness na elu eyi na-eguzogide, na elu ike, eyi iguzogide na adhesion iguzogide na-mma nke ukwuu.
2.Solubility nke VC na austenite dị elu karịa na ferrite. Na mbelata nke okpomọkụ, VC precipitates si ferrite, nke na-eme ka alloy ike na ọka nụchaa, na ogige oyi akwa na-egosi elu ike. 42CrMo ígwè bụ nke elu carbon na elu chromium ledeburite ígwè, nwere nnukwu carbide ọdịnaya, na-aza ihe dị ka 20%, na-emekarị na-ekesa na-ezighị ezi na belt ma ọ bụ netwọk, na oké njọ nkewa. Otú ọ dị, ọgwụgwọ okpomọkụ a na-emekarị na-esiri ike ịgbanwe nkewa nke carbide, nke na-emetụta ihe ndị na-arụ ọrụ nke ígwè na ndụ ọrụ nke ndị nwụrụ anwụ. Ụdị na nha nke carbide nwekwara mmetụta dị ukwuu na njirimara nke ígwè. Karịsịa, nnukwu carbide nkuku dị nkọ nwere mmetụta nkewa dị ukwuu na matrix ígwè ma na-abụkarị isi iyi nke ike ọgwụgwụ. Ya mere, ọ dị mkpa iji gbanwee forging nke raw akpọrepu ígwè, n'ụzọ zuru ezu na-etipịa eutectic carbides na-eme ka ha dị mma na evenly kesaa, na eriri Ọdịdị na-ekesa gburugburu oghere ma ọ bụ na-abụghị directionally, Ya mere, ka mma transverse n'ibu Njirimara nke ígwè. .
N'oge a na-akpụ akpụ, billet ahụ ga-ewe iwe ma dọpụta ya site n'akụkụ dị iche iche ruo ọtụtụ oge, ma mebie ya site na usoro "ọkụ abụọ na otu dị arọ", ya bụ, a ga-akụtu billet ahụ n'ụzọ dị mfe na mmalite nke ịwa ahụ iji gbochie mgbaji. Enwere ike ịkụ ya nke ukwuu na okpomọkụ dị n'etiti 980 ~ 1020 ℃ iji hụ na egwepịa nke carbides. 42CrMo ígwè na-adịghị egboro, na siri ike ngwọta abụọ refining ọgwụgwọ nakweere, ya bụ, nke abụọ preheating na banyere 500 ℃ na 800 ℃ na siri ike ngwọta ọgwụgwọ na 1100 ~ 1150 ℃, Quenching na-ekpo ọkụ mmanụ ma ọ bụ isothermal quenching, elu okpomọkụ tempering na 750 ℃, kpo oku na 960 ℃ mgbe machining na ikpeazụ okpomọkụ ọgwụgwọ mgbe mmanụ jụrụ nwekwara ike nụchaa carbides, gburugburu n'ọnụ na akuku na nụchaa ọka.
