A na-enyocha nhọrọ ihe onwunwe na usoro ọgwụgwọ okpomọkụ nke nnukwu ike bolts

1. nhọrọ ihe: ngbanwe abụọ nke arụmọrụ na ọnọdụ

Isi nkennukwu ike boltarụmọrụ dabere na njikota nkwado nke nhọrọ ihe na usoro ọgwụgwọ okpomọkụ.Ndị na-esonụ bụ isi ihe ngwọta nhọrọ ihe onwunwe na isi ọrụ nke ụlọ ọrụ:

1. Ọkara carbon alloy ígwè: nhọrọ mbụ maka ike dị elu

o Ụdị ọkwa: 42CrMo, 35CrMoA, 40Cr na ihe ndị ọzọ nwere ike siri ike na ike ịdị ike, bụrụ nhọrọ nke 10.9 na 12.9 klas bolts, karịsịa maka ike ifufe, ike nuklia na ihe ndị ọzọ dị arọ.

o siri ike chọrọ: Ihe kwesịrị ijide n'aka na ihe karịrị 90% nke akụkụ ahụ kwụsịrị bụ usoro martensitic, iji zere usoro na-abụghị nke martensitic n'ime obi na-eduga n'ịdalata ike.Ka ihe atụ, M48-M64 bolts mere nke 42CrMoA ígwè nwere ike izute 10.9 arụmọrụ index site quenching na 840-860 ℃ na tempering na 540 ℃.

2. Low carbon alloy steel: ma ike na iguzogide mgbaji na-egbu oge

o na-anọchi anya ihe: 20MnTiB, 35VB, wdg dị mma maka 10.9 klas bolts n'okpuru M24, na ha obere phosphorus ọdịnaya na elu ọka oke ọcha nwere ike ibelata ihe ize ndụ nke na-egbu oge mgbaji.

3. Igwe anaghị agba nchara: Ihe ngwọta maka gburugburu pụrụ iche

o Austenitic igwe anaghị agba nchara (dị ka 304, 316) nwere nguzogide corrosion, nke a na-ejikarị na injin mmiri na akụrụngwa kemịkal;Igwe anaghị agba nchara Martensitic (dị ka 410) na-ewe iwe iji nweta ike dị elu chọrọ.

4. Njikwa nhazi ihe

o spherodizing annealing pretreatment: ọkara carbon ígwè kwesịrị ịbụ isothermal annealing na 700 ℃ iji tọghata flake pearlite n'ime a bọl, melite oyi heading plasticity (ọnụego nrụrụ ruo 60%-80%), ma zere oyi na-atụ cracking.

2. Usoro ọgwụgwọ okpomọkụ: nguzozi ziri ezi nke ike na ike

Ọgwụgwọ okpomọkụ bụ isi njikọ iji chọpụta arụmọrụ nkebolts, na ọ dị mkpa iji nweta nkwalite akụrụngwa akụrụngwa zuru oke site na usoro iwe ọkụ "quenching + tempering".

1. Spheroidizing annealing usoro

o Usoro usoro: ọkara carbon ígwè na-mma nwayọọ nwayọọ mgbe kpo oku n'akụkụ oké egwu (700 ℃);Ọkara carbon alloy steel isothermal spheroidization annealing (AC1 + 20-30 ℃ kpo oku, 700 ℃ isothermal) iji hụ na uniformity nke Ọdịdị.

2. Quenching njikarịcha usoro

o okpomọkụ akara: The quenching okpomọkụ nso nke ọkara carbon alloy ígwè bụ 840-870 ℃, dị ka 42CrMoA ígwè iji 850-870 ℃ kpo oku nwere ike nụchaa ọka na melite omimi nke quenching oyi akwa.

o jụrụ ọkara nhọrọ: mmanụ quenching (L-AN10 ~ L-AN32) bụ isi ihe ngwọta, na-ewere n'ime akaụntụ jụrụ ọsọ na deformation akara;A na-emenyụ nnukwu bolts nkọwapụta (dị ka M30 na n'elu) na ngwọta mmiri PAG iji zere imenyụ mgbawa.

3. Tempering usoro ọhụrụ

o Okpomọkụ dakọtara: tempering okpomọkụ nke 42CrMo ígwè kwesịrị ịchịkwa na 500-540 ℃, nke nwere ike ọ bụghị nanị iwepụ quenching nchegbu, ma na-edebe nguzozi n'etiti tensile ike (≥950MPa) na ngalaba shrinkage (≥44%).

o mgbochi na njikwa brittleness: N'ihi na 12.9 klas bolts, mmiri jụrụ ma ọ bụ mmanụ jụrụ ngwa ngwa gafere 370-560 ℃ tempering kenkuwa mpaghara iji hụ na mmetụta siri ike na-ezute ọkọlọtọ.

4. Nnwale na njikwa mma

o Ngosipụta isi: ike (32-38HRC), ike mgbaji (≥1040MPa), elongation mgbe agbajiri agbaji (≥8%) na usoro metallographic (sorbite na-ewe iwe + trace ferrite) kwesịrị ịnwale nke ọma.

o Mmejọ zere: kpochapụ phosphorus polarization oyi akwa (oyi na kenkuwa isi iyi) na decarburization oyi akwa (isi ihe na-akpata ezughi oke ike ike), na nweta elu "efu ọxịdashọn" site na-aga n'ihu ntupu eriri ọkụ nchebe ikuku njikwa.

3. isi ihe mgbu nke ụlọ ọrụ na ọganihu mpaghara

1. Nka na ụzụ

o 12.9 klas bolts na-adabere na mbubata: n'ihi ezughị ezu ihe dị ọcha (elu P, S ọdịnaya) na ejighị n'aka na tempering usoro, ụlọ ngwaahịa nwere a oghere na mmetụta siri ike na-egbu oge mgbawa iguzogide ma e jiri ya tụnyere ngwaahịa ebubata.

2. Ọganihu mpaghara

o Large nkọwa bolt itunanya: Site optimizing na quenching okpomọkụ (850-870 ℃) na tempering parameters (500 ℃ × 180min) nke 35CrMoA ígwè, ụlọ ọrụ dị ka Shuihui Jiangtianbao Industrial ghọtara na uka mmepụta nke M30-M36 nkọwapụta 10.9 bolts.

o Usoro nkwalite: Webata ikuku a na-achịkwa na-aga n'ihu na ahịrị ọgwụgwọ okpomọkụ na-aga n'ihu, na-edozi nke ọma omimi nke oyi akwa decarburization (≤0.02mm), ma melite nhazi ngwaahịa.

4. omume n'ọdịnihu: ọgụgụ isi na arụmọrụ dị elu nke nwere ụkwụ abụọ

Site na nkwalite nke arụmọrụ bolt chọrọ n'ọhịa nke akụrụngwa ume ọhụrụ na ikuku ikuku, ụlọ ọrụ ahụ na-emewanye mgbanwe ya n'ụzọ abụọ:

• Usoro ọgụgụ isi: usoro nlekota oge nke usoro ọgwụgwọ okpomọkụ dabere na Ịntanetị nke ihe iji nweta njikwa ziri ezi nke mgbanwe mgbanwe ike ≤2HRC;

• Ihe ndị dị elu: mmepe nke obere alloy ultra-high ike ígwè (dị ka 40CrNiMoA), ọrụ mmetụta ezubere iche ≥60J (-40 ℃), iji kwalite nhazi zuru oke nke 12.9 bolts.

Mmechi

Nhọrọ ihe na ọgwụgwọ okpomọkụ nkeelu-ike boltsbụ "teknụzụ mmeri zoro ezo" n'ọhịa nke nrụpụta nkenke, nke chọrọ nhazi usoro sayensị na siri ike, ma na-adaberekwa na mmepụta ihe ọhụrụ nke ihe niile, akụrụngwa na ule.Site na ọganihu na-aga n'ihu nke ụlọ ọrụ ụlọ na usoro bụ isi, "mgbatị dị elu" nke a na-eme na China na-esi na "eji" mee ihe na "dị mfe iji" na "na-adịgide adịgide", na-enye nkwa siri ike maka nnwere onwe nke ngwá ọrụ dị elu.