Violet copper pipe and stainless steel canal solder technology

1 weldability is analysed

Of red copper and austenite stainless steel solder be attributed to heterogeneous metal to solder, both physical property distinction is very big, melting point differs amount to above of 400 ℃ , make solder difficulty increases, whether obtain solder contentedly contact, depend on method be solderinged by what the physical function of solder metal, chemical composition and place choose and technology.


2 physics function distinguishs an analysis

For copper and contrast of function of stainless steel physics, , steel and cupreous physics function are different very big, cupreous thermal conductance is 23.6 times of steel.

The quantity of heat when soldering can be conducted outwards from thermal treatment zone adroitly, bond reachs fused temperature hard, cause fill metal and mother capable person cannot very good fusion, fit solder does not show picture.

Cupreous line bilges coefficient compares steel slightly big, and 2.35 times shrinkage is steel, and heat conduction capability of copper is strong, the deflection when refrigeration is caky is big, and solder the stiffness of contact is big, solder be out of shape can break out after suffocate suffocate very great welding stress, become cause solder the mechanical element that crackle breaks out.


Solder method chooses

Red copper and stainless steel solder can choose solder of arc of gas welding, argon to wait solder method.

Of gas welding solder bath temperature is controlled easily, realize bosseyed solder simply double-faced figuration, the warm-up before undertaking solder to weldment and postheat are handier also. But because temperature of oxygen acetylene blaze is low, slack of quantity of heat, because red copper comes loose,overcome hard heat is fast and the defect that causes solder to be not appeared, obtain harder solder goodly quality.

Solder of craft argon arc (TIG) argon gas defends firm, bath metal breaks out not easily oxidation; solders temperature is high, energy is met collect and electric arc and bath visibility are good, the operation is convenience, control bath appearance and; of welding line figuration to do not have easily slaggy, do not need the slag remove after solder, solder contact exterior quality is good, reason decides those who choose TIG solder to solder method.

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