Factors That Increase The Low Temperature Brittleness Of Cold Rolled Precision Tube Light

Increase the factors of cold rolled precision steel tubes cold crisp light:

(1) solid solution strengthening elements. Increased phosphorus ductile-brittle transition temperature of the most intense, and molybdenum, titanium and vanadium; content has little effect at low and high rise element of ductile-brittle transition temperature of silicon, chromium, and copper; reduce the ductile-brittle transition temperature of nickel, decreased manganese ductile-brittle transition temperature.
(2) the form element of the second phase. Second-phase cold rolled precision steel tubes cold crisp light most important element for carbon, with the increase of bright carbon content in steel pipe precision, bright steel pipe precision Pearlite content increased, the average volume of each 1%-Pearlite ductile-brittle transition temperature by an average 2. 2. Add micro-alloying elements such as titanium, niobium and vanadium, form a diffuse distribution of nitrogen or carbon nitride, causing bright steel pipe precision ductile-brittle transition temperature to rise.
(3) effect of ductile-brittle transition temperature of grain size and grain coarsening, and ductile-brittle transition temperature. Grain refinement reduced cold rolled precision steel tubes cold crisp light, this is a widely used method.