Ƙaramin Walda na Karfe
J707
GB/T E7015-D2
AWS E10015-D2
Bayani: J707 wani lantarki ne mai ƙarfin ƙarfe mai ƙarancin ƙarfe mai laushi tare da rufin sodium mai ƙarancin hydrogen. Yi amfani da DCEP (mai nuna wutar lantarki kai tsaye), kuma ana iya haɗa shi a kowane matsayi. Idan ya cancanta, ana iya sanya walda a cikin wuta kafin walda kuma a rage zafi bayan walda.
Aikace-aikace: Ana amfani da shi musamman don walda 15MnMoV, 14MnMoVB, 18MnMoNb da sauran tsarin ƙarfe mai ƙarancin ƙarfe. Tsarin walda na iya aiki a ƙarƙashin yanayin walda ko dumama (500 ~ 650 ℃).
Sinadarin sinadarai na ƙarfen walda(%):
|
| C | Mn | Si | Mo | S | P |
| An Garanti | ≤0.15 | 1.65 ~ 2.00 | ≤0.60 | 0.25 ~ 0.45 | ≤0.035 | ≤0.040 |
| An gwada | 0.073 | 1.68 | 0.54 | 0.40 | 0.011 | 0.018 |
Kayan aikin injiniya na ƙarfe na walda:
| Gwaji abu | Ƙarfin tauri Mpa | Ƙarfin bayarwa Mpa | Ƙarawa % | Ƙimar tasiri (J) -30℃ |
| An Garanti | ≥690 | ≥590 | ≥15 | ≥27 |
| An gwada | 720 | 610 | 18.6 | — |
Yaɗuwar sinadarin hydrogen a cikin ƙarfe da aka ajiye: ≤4.0mL/100g (hanyar glycerin)
Duba X-ray: I maki
Shawarar da ake bayarwa:
| (mm) Diamita na sanda | 2.5 | 3.2 | 4.0 | 5.0 |
| (A) Walda na Wuta | 60 ~ 100 | 100 ~ 140 | 140 ~ 190 | 190 ~ 250 |
Sanarwa:
1. Dole ne a gasa wutar lantarki na tsawon awa 1 a zafin 350 ~380℃ kafin a fara aikin walda;
2. Yana da mahimmanci a tsaftace tsatsa, ma'aunin mai, ruwa, da ƙazanta a kan sassan walda kafin walda;
3. Yi amfani da aikin gajeriyar baka lokacin walda. Hanyar walda mai kunkuntar ta dace.






