in Dnipro

Mülheim an der Ruhr
Dnieper
Kiev

Alloy МЛ20-1

Designation

Name	The value
Designation GOST Cyrillic	МЛ20-1
Designation GOST Latin	ML20-1
Transliteration	ML20-1
By chemical elements	CuЛ20-1

Description

Alloy МЛ20−1 is used: for the manufacture of in ground and chill casting of shaped castings of parts of aerospace equipment continuously operating at temperatures up to +300 °C and for short periods up to 350 °C.

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 for a significant increase in mechanical properties of the alloy (σв, δ, an) casting in the ground and gravity die casting, heat treatment is performed on taimu T4 - heated to 395±5 °C (delay of 12-24 hours), heated to 420±5 °C (exposure 3-12 h), quenching in air or heated to 395±5 °C (delay of 12-24 hours), quenching by blowing air. Due to the low rate of diffusion processes as the cooling medium is usually a calm air. To improve the mechanical properties of the cooled castings may be conducted by blowing of air. Also to improve the mechanical properties (σв, σ0,2) castings in sand and chill casting is used, the heat treatment by mode T6 - heated to 395±5 °C (delay of 12-24 hours), heated to 420±5 °C (exposure 3-12 h), quenching in air or heated to 395±5 °C (delay of 12-24 hours), quenching by blowing air + Ageing at 205±5 °C (extract 9-10 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.