Njirimara igwe nke metal na-ezo aka na njirimara nke metal n'okpuru ike mpụga, tumadi gụnyere ihe ngosi ndị a.
① Ike kachaσb: oke nrụgide na mgbakasị mgbakasị nrụgide, unit
Ọ bụ MPa.
② Oke mkpụrụσs: mgbe nrụgide tensile nke ihe karịrị ihe na-agbanwe agbanwe na nrụrụ plastik na-amalite ịmalite nrụgide.Ọnweghị ala dị larịị pụtara ìhè n'ụdị mgbakasị mgbakasị ahụ nke ụfọdụ ihe, ya bụ, enweghị ike ikpebi mkpụrụ ya nke ọma.N'okwu a, akọwapụtara ya na injinịa na a na-ewere uru nrụgide nke 0.2% residual deformation of sample dị ka oke mkpụrụ nke ọnọdụ.σ0.2 gosipụtara na MPa.
③ Oke ntachi obi: mgbaji na-agbaji nke ihe nlele mgbe oge ụfọdụ gachara na ọnọdụ okpomọkụ.
Nkezi nrụgide na mgbape.Na injinia, a na-egosipụtakarị ya site na nkezi uru nrụgide nke ihe nlele mgbe ọ gbajiri maka 105h na imewe okpomọkụ The bit bụ MPa.
④ Oke oke: mee ka nlele ahụ mepụta ụfọdụ ọnụọgụ nke uru nrụgide nke creep.Tebụl uru nrụgide nke ígwè na okpomọkụ imewe maka 105h na ọnụego creep nke 1% na-ejikarị eme ihe na injinịa dị na MPa.
⑤ Mgbatị pasentịδ8: na-egosi na mgbe sample mebiri na tensile ule Pasent nke plastic elongation.Ọ bụ ndeksi iji tụọ plasticity nke ígwè.A na-ahọrọ ogologo oge mbụ nke ihe nlele ahụ dị ka ogologo ogologo nke ihe nlele ahụ
5 ugboro ma ọ bụ 10 ugboro dayameta, otú sample nwere δ5na δ10, na%.
⑥ Mbelata Mpagharaψ: na-egosi na mgbe ihe nlele ahụ mebiri na ule nkwụsị
Ọnụego nrụrụ rọba raw.Ọ bụ ihe ngosi ọzọ iji tụọ plasticity nke ihe, gosipụtara na%.
⑦ Mmetụta bara uru Ak: Ọ bụ ihe nleba anya nchara siri ike ma na-ekpebi ma igwe ahụ nwere ọdịda ọdịda egosi, nkeji: J.
⑧ Isi ike: na-egosipụta nguzogide ihe onwunwe na nrụrụ plastik mpaghara na nkwụsị nke ihe ahụ.Enwere ụdị okpokoro isi ike atọ na-egosi ụzọ, ntụgharị Brinell hardness HB, Rockwell hardness HR na Vickers Vickers Diamond Hardness HV nwere ụzọ nha dị iche iche na ngwa ngwa.Dị ka ahụmahụ si kwuo, enwere mmekọrịta dị n'etiti ike ike na ike nkwụsị dị ka ndị a: ígwè carbon ígwè dị ala na-atụgharị na nke a na-emekarị.σb= 0.36HB;Carbon Steel akpọrepu na normalized ọkara ígwè ma ọ bụ ala alloy ígwèσb= 0.35HB;Isi ike bụ 250 ~ 400HB, na ihe na-ekpo ọkụ na-emeso alloy ígwè.σb= 0.33HB.
N'ihi ịdị mma nke nha, a na-ejikarị ike nke mpaghara okpomọkụ na-emetụta iji chọpụta ogo nke ike nke nkwonkwo welded.
–本文内容摘抄自《压力管道设计及工程实例》
Oge nzipu: Feb-07-2023