17-4 alagbara jẹ ẹya-ara-hardening martensitic alagbara, apapọ agbara ga pẹlu awọn ipata resistance ti irin alagbara, irin.Hardening jẹ aṣeyọri nipasẹ igba diẹ, itọju iwọn otutu kekere ti o rọrun.Ko dabi awọn irin alagbara martensitic mora, gẹgẹ bi iru 410, 17-4 jẹ ohun weldable.Agbara, ipata ipata ati iṣelọpọ irọrun le ṣe 17-4 alagbara kan aropo ti o munadoko fun awọn irin erogba agbara giga bi daradara bi awọn onidi alagbara miiran.
Ni iwọn otutu itọju ojutu, 1900 ° F, irin naa jẹ austenitic ṣugbọn o ni iyipada si eto martensitic erogba kekere lakoko itutu si otutu yara.Iyipada yii ko pari titi ti iwọn otutu yoo lọ silẹ si 90°F.Alapapo atẹle si awọn iwọn otutu ti 900-1150°F fun wakati kan si mẹrin ojoriro n mu alloy lagbara.Itọju lile yii tun binu si eto martensitic, jijẹ ductility ati lile.
C | Cr | Ni | Si | Mn | P | S | Cu | Nb+Ta |
≤0.07 | 15.0-17.5 | 3.0-5.0 | ≤1.0 | ≤1.0 | ≤0.035 | ≤0.03 | 3.0-5.0 | 0.15-0.45 |
iwuwo | Specific agbara ooru | Ojuami yo | Gbona elekitiriki | Iwọn rirọ |
7.78 | 502 | 1400-1440 | 17.0 | 191 |
Ipo | бb/N/mm2 | б0.2/N/mm2 | 5/% | ψ | HRC | |
Òjòjò | 480 ℃ ti ogbo | 1310 | 1180 | 10 | 35 | ≥40 |
550℃ ti ogbo | 1070 | 1000 | 12 | 45 | ≥35 | |
580℃ ti ogbo | 1000 | 865 | 13 | 45 | ≥31 | |
620 ℃ ti ogbo | 930 | 725 | 16 | 50 | ≥28 |
AMS 5604, AMS 5643, AMS 5825, ASME SA 564, ASME SA 693, ASME SA 705, ASME Iru 630, ASTM A 564, ASTM A 693, ASTM A 705, ASTM Iru 630
Ipò A - H1150,ISO 15156-3,NACE MR0175,S17400,UNS S17400,W.Nr./EN 1.4548
•Rọrun lati ṣatunṣe ipele agbara, iyẹn nipasẹ awọn ayipada ninu ilana itọju ooru lati ṣatunṣemartensite alakoso transformation ati ti ogbo
itọju ti irin lara ojoriro alakoso ìşọn.
•Ipata rirẹ resistance ati omi resistance.
•Alurinmorin:Ni ipo ti ojutu ti o lagbara, ti ogbo tabi overageing, alloy le jẹ welded ni ọna ang, laisi preheating.
Ti o ba nbeere agbara alurinmorin sunmo si agbara irin ti ogbo lile, lẹhinna alloy gbọdọ jẹ ojutu to lagbara ati itọju ti ogbo lẹhin alurinmorin.
Yi alloy jẹ tun dara fun brazing, ati awọn ti o dara ju brazing otutu ni ojutu otutu.
•Idaabobo ipata:Alloy ipata resistance jẹ superior si eyikeyi miiran boṣewa hardenable alagbara, irin, ni aimi omi rorun jiya lati ogbara ipata tabi dojuijako.In awọn Epo epo ile ise, ounje processing ati iwe ile ise pẹlu ti o dara ipata resistance.
•Awọn iru ẹrọ ti ita, dekini ọkọ ofurufu, awọn iru ẹrọ miiran.
•Ounjẹ ile ise.
•Ti ko nira ati iwe ile ise.
•Aaye (tobaini abẹfẹlẹ).
•Awọn ẹya ẹrọ.
•Awọn agba egbin iparun.