ʻO Steel Bar 4140 vs 4130 vs 4340: ʻO nā mea a pau āu e pono ai e ʻike?

I ka wā e koho ai i ka pahu kila kila kūpono no ka mechanical, aerospace, a i ʻole nā noi ʻoihana, ʻekolu mau inoa e hele pinepine mai i mua -4140, 4130, a4340. Ua kaulana kēia mau kila chromium-molybdenum haʻahaʻa no ko lākou ikaika, paʻakikī, a me ka machinability. Akā pehea ʻoe e ʻike ai i ka mea kūpono i kāu papahana?

Ma kēia alakaʻi piha, hoʻohālikelike mākou4140 vs 4130 vs 4340 mau pahu kilama waena o nā metric nui e like me ka haku mele, nā waiwai mechanical, ka paʻakikī, ka weldability, ka mālama ʻana i ka wela, a me ke kūpono o ka noi - kōkua i nā ʻenekinia, nā mea hana, a me nā mea kūʻai aku e hana i nā hoʻoholo waiwai.

1. Hoʻomaka i ka 4140, 4130, a me 4340 mau pahu kila.

1.1 He aha nā hao hao haʻahaʻa?

ʻO nā kila haʻahaʻa haʻahaʻa he mau kila kalapona e hoʻokomo i nā mea hoʻohui liʻiliʻi e like me chromium (Cr), molybdenum (Mo), a me nickel (Ni) e hoʻomaikaʻi i nā waiwai kikoʻī.

1.2 Nānā O kēlā me kēia Papa

• 4140 Ke kila: He kila nui e hāʻawi ana i ka ikaika a me ka paʻakikī, hoʻohana nui ʻia i ka hana ʻana i nā mea hana, nā ʻāpana kaʻa, a me ka ʻenekinia maʻamau.

• 4130 Ke kila: ʻIke ʻia no kona paʻakikī kiʻekiʻe a me ka weldability, hoʻohana pinepine ʻia i nā mokulele a me nā kaʻa kaʻa.

• 4340 Ke kila: ʻO kahi huila nickel-chromium-molybdenum me ka ikaika kiʻekiʻe loa a me ke kūpaʻa luhi, makemake ʻia no ka aerospace a me nā noi kaumaha.

2. Hoʻohālikelike Hoʻohui Kemika

Nā memo koʻikoʻi:

• 4340ua hoʻohuinikela, hāʻawi iā ia i ka paʻakikī kiʻekiʻe a me ke kūpaʻa luhi.

• 4130loaʻa ka haʻahaʻa kalapona, hoʻomaikaʻiweldability.

• 4140he kiʻekiʻe ke kalapona a me ka manganese, hoʻonuika paakiki a me ka ikaika.

3. Hoʻohālikelike Mechanical Properties

4. Hoʻomaʻamaʻa wela a me ka paʻakikī

4130

• Hoʻoponopono maʻamau: 870–900°C

• Paʻakiki: E kinai aila mai 870°C

• Ka hoʻohaunaele: 480–650°C

• ʻOi loa no: Pono nā noiweldabilityaʻoʻoleʻa

4140

• Paʻakiki: E kinai aila mai 840–875°C

• Ka hoʻohaunaele: 540–680°C

• Ka paakiki: Maikaʻi — hiki ke hoʻokō ʻia ka paʻakikī hihia hohonu

• ʻOi loa no: Kiekie-ikaika shafts, gears, crankshafts

4340

• Paʻakiki: Aila a polymer kinai mai 830–870°C

• Ka hoʻohaunaele: 400–600°C

• Kaulana: Mālama i ka ikaika ma hope o ka paʻakikī hohonu

• ʻOi loa no: Nā mea hoʻokele mokulele, nā mea hoʻokele kaumaha

5. Weldability a me Machinability

4130kū i waho no ka maʻalahi o ka weldable me ka hoʻohana ʻana i ka TIG/MIG me ka ʻole o ka haki ʻana, kūpono no nā hale paipu e like me nā hale ʻōwili a i ʻole nā papa mokulele.

6. Nā noi e ka ʻoihana

6.1 4130 Noi hao

• ʻAerospace paipu

• Nā papa heihei a me nā hīnaʻi ʻōwili

• Nā papa kaʻa kaʻa

• Nā mea lawe pū

6.2 4140 Nā mea hana kila

• Mea paʻa

• Crankshafts

• Na Gears

• Axles a me nā kumu

6.3 4340 Nā mea hao

• Lae pae mokulele

• ʻO nā bolts ikaika kiʻekiʻe a me nā mea hoʻopaʻa

• Nā ʻāpana mīkini kaumaha

• ʻO nā ʻoihana ʻaila a me ke kinoea

7. Noonoo Kumukuai

Ma muli o konamaʻiʻo nikela, ʻO 4340 ka pipiʻi loa. Eia naʻe, ʻo kāna hana i nā noi koi pinepine e hoʻāpono i ke kumukūʻai.

8. Nā Kūlana Kūlana a me nā Koho

E hōʻoia i kāu mea hoʻolako kila e hāʻawi i nā palapala hōʻoia wili e hoʻokō me nā kūlana kūpono e like meASTM A29, EN 10250, a i ʻoleJIS G4053.

9. Pehea e koho ai i ka pahu kila pono

10. Ka hopena

I ka hoʻokūkū oPahu hao 4140 vs 4130 vs 4340, ʻaʻohe mea lanakila - ʻo ka koho kūpono e pili ana iā ʻoeka hana, ka ikaika, ke kumukūʻai, a me nā koi wili.

• E koho4130inā makemake ʻoe i ka weldability maikaʻi a me ka ikaika haʻahaʻa.

• E hele me4140no ka ikaika kiʻekiʻe, ke kumu kūʻai kūpono kūpono no nā shafts a me nā mīkini.

• E koho4340ke koʻikoʻi ka ʻoʻoleʻa, ka ikaika luhi, a me ke kūʻē ʻana i ka haʻalulu.