Xa kuziwa ekukhetheni intsimbi yentsimbi echanekileyo yomatshini, i-aerospace, okanye usetyenziso lwamashishini, amagama amathathu ahlala esiza phambili -4140, 4130, kwaye4340. Ezi zintsimbi ze-chromium-molybdenum ziyaziwa ngokuba namandla, ukuqina, kunye nokuguquguquka. Kodwa wazi njani ukuba yeyiphi eyona ifanelekileyo kwiprojekthi yakho?
Kwesi sikhokelo sibanzi, siyathelekisa4140 vs 4130 vs 4340 imivalo yentsimbikuzo zonke iimethrikhi eziphambili ezifana nokwakhiwa kweekhemikhali, iipropathi zoomatshini, ubulukhuni, ukuwelda, unyango lobushushu, kunye nokufaneleka kwesicelo - iinjineli ezincedisayo, abenzi bobuchule, kunye nabathengi benze izigqibo zezinto eziphathekayo.
1. Intshayelelo kwi-4140, 4130, kunye ne-4340 ye-Steel Bars
1.1 Zintoni ii-Low-Alloy Steels?
Iintsimbi eziphantsi kwe-alloy ziyi-carbon steels ezibandakanya ixabiso elincinci lezinto ezixubileyo ezifana ne-chromium (Cr), i-molybdenum (Mo), kunye ne-nickel (Ni) ukuphucula iipropati ezithile.
1.2 Isishwankathelo seBakala ngalinye
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4140 Intsimbi: Intsimbi eguquguqukayo enika amandla abalaseleyo kunye nokuqina, isetyenziswa ngokubanzi ekwenzeni izixhobo, iinxalenye zemoto, kunye nobunjineli ngokubanzi.
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4130 Intsimbi: Iyaziwa ngokuqina kwayo okuphezulu kunye ne-weldability, ehlala isetyenziswa kwinqwelomoya kunye nemidlalo yemoto.
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4340 Intsimbi: I-alloy ye-nickel-chromium-molybdenum enamandla amakhulu kunye nokumelana nokukhathala, okuthandwa kwi-aerospace kunye nezicelo ezinzima.
2. Uthelekiso lokuBumba kweMichiza
| Isiqalelo | 4130 (%) | 4140 (%) | 4340 (%) |
|---|---|---|---|
| Ikhabhoni (C) | 0.28 - 0.33 | 0.38 - 0.43 | 0.38 - 0.43 |
| IManganese (Mn) | 0.40 - 0.60 | 0.75 - 1.00 | 0.60 - 0.80 |
| I-Chromium (Cr) | 0.80 - 1.10 | 0.80 - 1.10 | 0.70 - 0.90 |
| I-Molybdenum (Mo) | 0.15 - 0.25 | 0.15 - 0.25 | 0.20 - 0.30 |
| I-Nickel (Ni) | - | - | 1.65 - 2.00 |
| Isilicon (Si) | 0.15 - 0.35 | 0.15 - 0.30 | 0.15 - 0.30 |
Amanqaku aphambili:
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4340uye wongezanickel, inika ubunzima obuphezulu kunye nokumelana nokudinwa.
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4130inomxholo ophantsi wekhabhoni, uphuculaukuwelda.
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4140inekhabhoni ephezulu kunye nemanganese, inyusaubunzima kunye namandla.
3. Uthelekiso lweePropati zoomatshini
| Ipropati | 4130 Intsimbi | 4140 Intsimbi | 4340 Intsimbi |
|---|---|---|---|
| Amandla Okuqina (MPa) | 670 - 850 | 850 - 1000 | 930 - 1080 |
| Isivuno Amandla (MPa) | 460 – 560 | 655 – 785 | 745 – 860 |
| Ubude (%) | 20 – 25 | 20 – 25 | 16 – 20 |
| Ukuqina (HRC) | 18 – 25 | 28 – 32 | 28 – 45 |
| Ukuqina kweMpembelelo (J) | Phezulu | Phakathi | Phezulu kakhulu |
4. Unyango lobushushu kunye nokuqina
4130
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Ukulungelelanisa: 870–900°C
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Ukuqina: Ukucima i-oyile ukusuka kwi-870°C
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Ukufudumeza: 480–650°C
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Eyona nto ingcono kwi: izicelo ezifunekayoukuweldakwayeubunzima
4140
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Ukuqina: Ukucima i-oyile ukusuka kwi-840–875°C
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Ukufudumeza: 540–680°C
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Ukuba lukhuni: Egqwesileyo - nzulu ityala lukhuni inokwenzeka
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Eyona nto ingcono kwi: Amandla aphezulu, iigiya, ii-crankshafts
4340
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Ukuqina: I-oyile okanye i-polymer yokucima ukusuka kwi-830-870 ° C
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Ukufudumeza: 400–600°C
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Kuyaphawuleka: Igcina amandla nasemva kokuqina okunzulu
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Eyona nto ingcono kwi: Izixhobo zokumisa iinqwelomoya, izinto zokuqhuba umsebenzi onzima
5. Weldability kunye Machinability
| Ipropati | 4130 | 4140 | 4340 |
|---|---|---|---|
| Ukuweldability | Egqwesileyo | Kuhle ukuya kokulungileyo | Mhle |
| Ubuchule | Kulungile | Kulungile | Phakathi |
| Ukufudumala | eCetyisiweyo kumacandelo angqingqwa (>12mm) | ||
| Unyango lwe-Post-Weld Heat | Kunconywa kwi-4140 kunye ne-4340 ukunciphisa uxinzelelo kunye nokuqhekeka |
4130imele ukuba i-weldable ngokulula usebenzisa i-TIG/MIG ngaphandle kokuqhekeka okugqithisileyo, ilungele izakhiwo zetyhubhu ezifana neekheji zokuqengqeleka okanye iifreyimu zenqwelomoya.
6. Izicelo zoShishino
6.1 4130 Izicelo zentsimbi
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Iityhubhu zeAerospace
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Iifreyimu zomdyarho kunye neekheji zokuqengqeleka
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Izakhelo zesithuthuthu
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Abamkeli bemipu
6.2 4140 Izicelo zentsimbi
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Abaphethe izixhobo
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IiCrankshafts
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Iigiya
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Ii-asi kunye neeshafti
6.3 4340 Izicelo zentsimbi
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Izixhobo zokumisa iinqwelomoya
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Iibholiti eziphezulu kunye ne-fasteners
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Amacandelo oomatshini anzima
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Iishafti ze-oyile kunye negesi yeshishini
7. Ukuqwalaselwa kweendleko
| IBanga | Iindleko ezizalanayo | Ubukho |
|---|---|---|
| 4130 | Phantsi | Phezulu |
| 4140 | Phakathi | Phezulu |
| 4340 | Phezulu | Phakathi |
Ngenxa yayoumxholo we-nickel, I-4340 yeyona ibiza kakhulu. Nangona kunjalo, ukusebenza kwayo kwizicelo ezifunwayo zihlala zithethelela iindleko.
8. IMigangatho yeZizwe ngezizwe kunye nokuMiselwa
| IBanga leNsimbi | I-ASTM | SAE | EN/DIN | I-JIS |
|---|---|---|---|---|
| 4130 | A29/A519 | 4130 | 25CrMo4 | I-SCM430 |
| 4140 | A29/A322 | 4140 | 42CrMo4 | I-SCM440 |
| 4340 | A29/A322 | 4340 | 34CrNiMo6 | I-SNCM439 |
Qinisekisa ukuba umthengisi wakho wentsimbi ubonelela ngezatifikethi zovavanyo lokusila ezihambelana nemigangatho efanelekileyo efanaI-ASTM A29, EN 10250, okanyeI-JIS G4053.
9. Indlela yokukhetha iBar yeNsimbi eLungileyo
| Imfuneko | IBanga elicetyiswayo |
|---|---|
| Eyona weldability | 4130 |
| Ibhalansi engcono yamandla kunye neendleko | 4140 |
| Ukuqina kokugqibela kunye namandla okudinwa | 4340 |
| Ukumelana nokunxiba okuphezulu | 4340 okanye lukhuni 4140 |
| I-aerospace okanye i-automotive | 4340 |
| Ubunjineli ngokubanzi | 4140 |
10. Isiphelo
Kukhuphiswano lweIbha yentsimbi 4140 vs 4130 vs 4340, akukho ophumeleleyo ubungakanani obunye — ukhetho olulungileyo luxhomekeke kulwakhoukusebenza, amandla, iindleko, kunye neemfuno welding.
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Khetha4130ukuba ufuna i-weldability ebalaseleyo kunye namandla aphakathi.
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Hamba ne4140kumandla aphezulu, ukhetho olunexabiso elifanelekileyo olufanelekileyo kwi-shafts kunye nezixhobo.
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Khetha4340xa ukuqina okugqithisileyo, amandla okudinwa, kunye nokumelana nokothuka kubalulekile.
Ixesha lokuposa: Jul-24-2025