Supply lead-free solder paste

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Supply lead-free solder paste

Information Name:	Supply lead-free solder paste
Published:	2005-12-23
Validity:	1000
Specifications:	Sn99.98
Quantity:	0.00
Price Description:	Negotiable
Detailed Product Description：	Preheat Zone: heating rate should be set at 1-3 ℃ / sec, the temperature in the preheat zone too fast, easy to shift the flow of solder paste and component deterioration, easy to produce explosive tin and solder balling. Immersion area: the temperature of 120-190 ℃, the most appropriate time to 80-130 seconds. If the temperature is too low, then the solder will not reflow after the melting to happen. Recommended temperature rise rate of <2 ℃ / sec. Back to the welding area: peak temperature should be set at 245-250 ℃. Melting time suggested that the time above 230 ℃ adjusted to 30-60 seconds, 240 ℃ above are adjusted to 10-30 seconds. Cooling area: cooling rate <4 ℃ / sec.

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