Alloy МЛ22
Designation
| Name |
The value |
| Designation GOST Cyrillic |
МЛ22 |
| Designation GOST Latin |
ML22 |
| Transliteration |
ML22 |
| The chemical elements |
CuЛ22 |
Description
Alloy МЛ22 used: for the manufacture of various shaped precise casting parts of aviation methods of sand casting, shell mold, gravity die casting, investment casting and plaster mold.
Standards
| Name |
Code |
Standards |
| Thermal and thermochemical treatment of metals |
В04 |
OST 1 90121-90 |
Technological properties
| Name |
The value |
| Features of heat treatment |
According to OST 1 90121-90 to improve the mechanical properties (σв, σ0,2) castings in sand and chill casting, shell mold and the plaster mold, investment casting applied heat treatment by mode T6 - Heat to 400±5 °C (extract 3 hours), heating to 450±5 °C (extract 10-16 hours), quenching in air + Aging at 130±5 °C (extract 48 h), air cooling. In this case the plastic properties decrease. A noticeable increase in the values of σв, σ0,2 is achieved in the hardening of the casting by blowing air. To maximize the mechanical properties of the alloy (σв, σ0,2) mode is applied Kzt61 - Quenching in warm water (80-90 °C) with 450±5 °C (Stepwise heating to 400±5 °C (extract 3 hours), heating to 450±5 °C (speed of 10-16 h)) + Aging at 130±5 °C (extract 48 h), air cooling. |
