ⅠNchịkọta
N'ime ụlọ ọrụ ọkụ ọkụ, sistemu petrochemical, mmiri mmiri dị elu na ụlọ ọrụ kemịkalụ coal, mmiri agwakọta ya na uzuzu na ihe siri ike, na mmiri na-emebi emebi nke ukwuu, valvụ bọọlụ kwesịrị iji valvụ bọọlụ siri ike mechiri emechi, yabụ họrọ ọla kwesịrị ekwesị nke siri ike mechie. bọọlụ valvụ.Usoro siri ike nke bọọlụ na oche nke valvụ bọọlụ dị ezigbo mkpa.
ⅡUsoro ịgba egwu bọọlụ na oche nke valvụ bọọlụ nwere ike mechie ọla
Ka ọ dị ugbu a, usoro ịgba ike a na-ejikarị eme ihe maka elu igwe bọọlụ valvụ bọọlụ siri ike na-etinyekarị ihe ndị a:
(1) Mgbochi alloy siri ike (ma ọ bụ ịgbado ọkụ) n'elu oghere ahụ, ike siri ike nwere ike iru karịa 40HRC, usoro ịgbanye elu nke alloy siri ike na mbara ala dị mgbagwoju anya, nrụpụta nrụpụta dị ala, yana nnukwu mpaghara. surfacing ịgbado ọkụ dị mfe deform akụkụ.A na-eji usoro nke ike ikpe siri ike mee ihe ugboro ugboro.
(2) A na-ekpuchi elu nke oghere ahụ na chrome siri ike, ike nwere ike iru 60-65HRC, na ọkpụrụkpụ bụ 0.07-0.10mm.Ihe mkpuchi chrome-plated nwere nnukwu ike siri ike, na-eyi nguzogide, nguzogide corrosion ma nwee ike ime ka elu ahụ na-egbuke egbuke ruo ogologo oge.Usoro ahụ dị mfe ma ọnụ ahịa dị ala.Otú ọ dị, ike nke plating chrome siri ike ga-ebelata ngwa ngwa n'ihi ntọhapụ nke nrụgide dị n'ime mgbe okpomọkụ na-abawanye, na okpomọkụ ọrụ ya enweghị ike ịdị elu karịa 427 Celsius.Tụkwasị na nke ahụ, ike njikọ nke chrome plating oyi akwa dị ala, na oyi akwa oyi akwa na-adịkarị mfe ịdapụ.
(3) N'elu nke sphere na-anabata plasma nitriding, elu ike ike iru 60 ~ 65HRC, na ọkpụrụkpụ nke nitride oyi akwa bụ 0.20 ~ 0.40mm.N'ihi nguzogide corrosion na-adịghị mma nke usoro ọgwụgwọ nitriding plasma siri ike, enweghị ike iji ya n'ubi kemịkalụ siri ike corrosion.
(4) Usoro spraying supersonic (HVOF) n'elu oghere nwere ike ruru 70-75HRC, ike nchịkọta dị elu, na ọkpụrụkpụ nke 0.3-0.4mm.HVOF spraying bụ isi usoro usoro maka elu hardening nke sphere.A na-ejikarị usoro ike siri ike a na ụlọ ọrụ ọkụ ọkụ, sistemu petrochemical, mmiri mmiri dị elu na ụlọ ọrụ kemịkalụ coal, mmiri agwakọta na uzuzu na ihe siri ike, na mmiri mmiri na-emebi emebi.
The supersonic spraying usoro bụ usoro usoro nke combustion nke oxygen mmanụ ụgbọala na-emepụta elu-ọsọ ikuku na-eme ngwangwa na ntụ ntụ irighiri kụrụ n'elu nke akụrụngwa na-etolite a ok n'elu mkpuchi.N'oge usoro mmetụta, n'ihi na ngwa ngwa ngwa ngwa ngwa ngwa ngwa ngwa (500-750m / s) na obere urughuru okpomọkụ (-3000 ° C), elu bonding ike, obere porosity na ala oxide ọdịnaya nwere ike nweta mgbe akụ n'elu nke akụkụ. .mkpuchi.Ihe e ji mara HVOF bụ na ọsọ nke ihe ntụ ntụ alloy karịrị ọsọ nke ụda, ọbụna 2 ruo 3 ugboro ọsọ nke ụda, na ikuku ikuku dị okpukpu anọ karịa ọsọ nke ụda.
HVOF bụ nkà na ụzụ nhazi ọhụrụ, ọkpụkpụ ịgba ahụ bụ 0.3-0.4mm, mkpuchi na ihe mejupụtara ya na-ejikọta ya na ígwè ọrụ, ike njikọ dị elu (77MPa), na mkpuchi porosity dị ala (<1%).Usoro a nwere obere okpomọkụ okpomọkụ maka akụkụ (<93 ° C), akụkụ ndị ahụ adịghị emebi emebi, enwere ike ịgbasa oyi.Mgbe ị na-agbapụta, ngwa ngwa ngwa ngwa ntụ ntụ dị elu (1370m / s), ọ dịghị mpaghara okpomọkụ na-emetụta, ihe mejupụtara na nhazi nke akụkụ ahụ adịghị agbanwe agbanwe, mkpuchi mkpuchi dị elu, a pụkwara iji ya rụọ ọrụ.
Ịgbado ọkụ bụ usoro ọgwụgwọ ịgbasa ọkụ n'elu ihe igwe.Ọ na-ekpocha ntụ ntụ (ọla ígwè, ntụ ntụ ntụ, seramiiki ntụ ntụ) na steeti a wụrụ awụ ma ọ bụ dị elu site na isi iyi ọkụ, wee fesa ya site na ikuku ikuku ma tinye ya n'elu akụkụ ahụ a gwọchara ya iji mepụta oyi akwa. elu nke akụkụ ahụ.(Substrate) jikọtara ya na mkpuchi siri ike (welding) oyi akwa.
Na ịgbado ọkụ ịgbado ọkụ na surfacing usoro hardening, ma carbide cimented na substrate nwere usoro agbaze, na e nwere a na-ekpo ọkụ gbazee mpaghara ebe cemented carbide na substrate zutere.Mpaghara ahụ bụ elu kọntaktị igwe.A na-atụ aro na ọkpụrụkpụ nke carbide cimented kwesịrị ịbụ ihe karịrị 3mm site na ịgbado ọkụ ma ọ bụ n'elu.
Ⅲ. Isi ike nke kọntaktị dị n'etiti bọọlụ na oche nke valvụ bọọlụ nwere ike mechie
Elu kọntaktị na-amị amị metal kwesịrị inwe ọdịiche siri ike, ma ọ bụghị ya, ọ dị mfe ime ka ọdịdọ.Na ngwa bara uru, ihe dị iche iche siri ike dị n'etiti bọọlụ valvụ na oche valvụ na-abụkarị 5-10HRC, nke na-eme ka valvụ bọọlụ nwee ndụ ọrụ ka mma.N'ihi nhazi mgbagwoju anya nke oghere na ọnụ ahịa nhazi dị elu, iji chebe oghere ahụ site na mmebi na iyi, ike siri ike nke gburugburu na-adịkarị elu karịa ike nke elu oche valve.
E nwere ụdị njikọ ike abụọ dị iche iche nke a na-ejikarị eme ihe na kọntaktị elu ike nke bọl valvụ na oche valvụ:Alloy, egwuregwu siri ike a bụ egwuregwu siri ike nke a na-ejikarị eme ihe maka valvụ bọọlụ ejiri mechiri emechi, nke nwere ike izute ihe ndị a na-eyi na-achọkarị nke valvụ bọọlụ ejiri mechiri emechi;② Isi ike nke bọọlụ valvụ bụ 68HRC, elu oche valvụ bụ 58HRC, enwere ike fesa elu bọọlụ valvụ ahụ na supersonic tungsten carbide.E nwere ike iji Stelite20 alloy mee elu oche valvụ site na spraying supersonic.A na-eji ike a eme ihe n'ọtụtụ ebe na ụlọ ọrụ kemịkalụ coal ma nwee oke mgbochi iyi na ndụ ọrụ.
ⅣEpilogue
Bọọlụ valvụ na oche valvụ nke valvụ bọọlụ siri ike nke metal na-anakwere usoro siri ike nke ezi uche dị na ya, nke nwere ike ikpebi ozugbo ndụ ọrụ na arụmọrụ nke valvụ siri ike nke ọla, na usoro siri ike nke nwere ezi uche nwere ike belata ọnụ ahịa nrụpụta.
Oge nzipu: Ọktoba 26-2022