The ịwụ ahụ ihe nke wY25 excavator bụ Q345, nke nwere ezi weldability. The ịwụ ihe onwunwe bụ ZGMn13 (elu manganese ígwè), nke bụ otu-phase austenite na elu okpomọkụ na nwere ezi ike na elu eyi iguzogide n'okpuru mmetụta ibu n'ihi na-arụ ọrụ hardening nke elu oyi akwa. Ma nke a ígwè weldability bụ ogbenye: otu bụ na ịgbado ọkụ okpomọkụ-emetụta mpaghara ọdịda nke carbide mere ihe embrittlement; Nke abụọ bụ weld thermal cracking, karịsịa na nso onuete mpaghara liquefaction mgbape.
1.okpomọkụ na-emetụta mpaghara ọdịda anyanwụ carbide nke ebrittlement kpatara
ZGMn13 nnukwu manganese ígwè nwere ike ịkwanye carbide n'akụkụ oke ọka mgbe ọ na-ekpo ọkụ ọzọ karịa 250 ℃, nke mere na ike nke ihe ahụ na-ebelata nke ukwuu na arụmọrụ dị mma nke ígwè manganese dị elu mebiri emebi. Mgbe nyochachara, mgbe nnukwu manganese ígwè na-ekpo ọkụ ọzọ na ọsọ jụrụ oyi na-agba ọsọ ngwa ngwa, carbide ga-ebu ụzọ mee ka ọ dị elu na oke ọka, na ịgbatị oge obibi, carbide na ókèala ọka ga-agbanwe site na njedebe nke urughuru na ntupu. nkesa, na brittleness ya ga-abawanye nke ukwuu. Ya mere, mgbe nnukwu manganese ígwè na ịgbado ọkụ ma ọ bụ reheating mgbe ịgbado ọkụ, ga-na ịgbado ọkụ okpomọkụ-emetụta mpaghara nke a ngalaba nke ọdịda nke carbide dị iche iche degrees, na nwere ike ịbụ martensitic mgbanwe, ọ bụghị nanị na-eme ka ihe kenkuwa, kamakwa. belata nguzogide iyi ya na mmetụta siri ike. Na, na mpaghara okpomọkụ emetụtara, ọ dị mfe ịkpali oke okpomọkụ nke carbide (650 ℃ ma ọ bụ karịa) ogologo oge obibi, ka mmiri ozuzo na-abawanye.
Iji belata mmiri ozuzo nke carbide ma gbochie ihe ahụ ka ọ ghara ịla n'iyi na ịghọ ihe na-akụda mmụọ, ekwesịrị ịme ihe iji mee ka ọnụ ọgụgụ dị jụụ dị ngwa ngwa, ya bụ, iji belata oge obibi na okpomọkụ dị elu. N'ihi nke a, ndị excavator ịwụ ahụ na ịwụ ezé ịgbado ọkụ iji obere nkeji ịgbado ọkụ, intermittent ịgbado ọkụ, tetara mmiri ịgbado ọkụ, wdg.
2.Welding thermal cracking
Mgbochi mgbawa ọkụ bụ ibelata ọdịnaya nke S na P n'ime igwe ala ma ọ bụ ihe weld; nwekwara ike ime ihe iji belata nrụgide ịgbado ọkụ site na usoro ịgbado ọkụ, dị ka iji obere ịgbado ọkụ nkeji, ịgbado ọkụ na-adịte aka, ịgbado ọkụ na hammering mgbe ịgbado ọkụ. Na bọket ahụ machie ịgbado ọkụ dị elu manganese ígwè, ị nwere ike ibu ụzọ weld oyi akwa nke Cr-ni, Cr-ni-Mn ma ọ bụ Cr-Mn austenitic ígwè maka iche ịgbado ọkụ ọwa, nwere ike igbochi cracks.
Excavator ịwụ ahụ na ịwụ ezé ịgbado ọkụ usoro
1.Nkwadebe tupu ịgbado ọkụ
Nke mbụ, wepụ ezé ịwụ na-eyi na ịwụ ahụ, wee jiri akụkụ grinder mee ka ntinye nke ezé ịwụ ahụ dị ọcha, ọ dịghị apịtị, nchara, ma jiri nlezianya lelee ma enwere mgbape na ntụpọ ndị ọzọ; meghee bevel ahụ na carbon arc gas planer na ezé ịwụ ka a ga-agbakọ, wee jiri igwe ihe nkuku hichaa ya.
2. Welding
① mbụ na ịwụ ahụ (na nkwonkwo ezé ịwụ) na GBE309-15 ịgbado ọkụ electrodes maka machie ịgbado ọkụ, ịgbado ọkụ electrodes kwesịrị ịbụ 350 ℃, 15h ihicha tupu ịgbado ọkụ, ịgbado ọkụ ugbu a kwesịrị ịbụ nnukwu, ịgbado ọkụ ọsọ bụ ubé nwayọọ iji hụ na ọdịnaya nickel mpaghara ngwakọta nke 5% ruo 6%, iji gbochie mmepụta nke martensite mgbawa.
② Na-eduzi ịgbado ọkụ. Mgbe a na-agbakọta ezé ịwụ n'ebe ahụ, a na-eji mkpanaka ịgbado ọkụ D266 na dayameta nke 32MM maka ịgbado ọkụ n'akụkụ abụọ, ogologo nke weld adịghị agafe 30MM. mmiri jụrụ na hammering ozugbo ịgbado ọkụ.
③ Mgbado ọkụ n'okpuru. Jiri mkpanaka ịgbado ọkụ 32MM D266 dayameta maka ịgbado ọkụ ala. Jiri obere ihe dị ugbu a, DC reverse polarity, ịgbado ọkụ oge.
Oge nzipu: Ọgọst-04-2022