The relative ease of Ag 3Sn nucleation on the Cu 6Sn 5 reaction layer is responsible for the large plates often reported in electronic solder joints. 1000W Hot Air Rework Station Soldering Heat Gun Digital Display Quick Station. 992DA+ BGA Rework Soldering Station SMD Hot Air gun Solder Iron Pen Repair Board. This is shown to be due to constitutional supercooling generated by Ag solute rejection into the liquid ahead of the Cu 6Sn 5 reaction layer, with additional contributions from geometrical catalysis in the grooves between Cu 6Sn 5 scallops and heterogeneous nucleation of Ag 3Sn on Cu 6Sn 5. 8 Holes Hot Air Gun Handle BGA Rework Solder Blower Heat Soldering Station 858. Reworking cold joints Reflowing solder paste Removing solder bridging. Soldering to copper substrates significantly catalysed Ag 3Sn nucleation. Hot air guns produce heated airflow that can melt solder and remove components. Reflowing the motherboard of your Xbox 360 allows the solder balls located beneath the CPU, GPU, RAM, and other chips to reconnect with their contacts on the motherboard. Real-time X-ray imaging proved that Ag 3Sn cyclic twins come from a common point, indicating they initiate in the process of nucleation or in the very early stages of growth in the undercooled melt. You'll need the high temperature output of a heat gun to accomplish the reflow. Here, the faceted solidification of Ag 3Sn was studied as a function of melt undercooling, revealing transitions from single crystal plates to cyclic twinned plates and then to highly branched structures created by twin mediated branching. VEVOR Reflow Oven Reflow Soldering Machine T962A SMD BGA Infrared IC Heater New 284.99 389.99 27 off Free shipping 146 sold Hot Air And Soldering 2 in 1 Rework Station With / Switch Conversion New 115.49 Free shipping 41 sold 110V 853A/853AA SMD BGA Station Rework Hot Air Gun Solder Welding NEW New 82. I'll report back later after it's all back together.Large Ag 3Sn plates in solder joints can affect the reliability of electronics, however, the factors affecting their nucleation and morphology are not well understood. I'm going to apply some new thermal paste before I put it completely back together. Compatible with infrared and vapor phase reflow solder process. I did this for only 5 minutes and let it cool down.ĭropped it back into the MBP (without inserting the screws yet), turned it on and it fired right up! A heat gun is ideal for that solder whose melting point is less than 400 degree-centigrade. Because a heat gun is the cheapest way to reflow solder. I just went by touch to guess if it the temperature was too hot. Yes, a solder can reflow with a heat gun. I choose the heat gun method.Īfter removing the logic board, I used a "craft store" heat gun (which my wife uses for embossing text/art on greeting cards) and slowly began heating up the board.įor a minute or 2, I held the gun about 10" away and warmed it up, gradually moving it closer (3" - 5") and waving it around the entire board, both sides, mostly aimed at the processor chips. 2-in-1 Rework Soldering Station Iron Solder Hot Air Gun Digital SMD Desoldering AU 76.95 2 in1 Soldering Iron Solder Rework Station Hot Air Gun Digital SMD Desoldering AU 76. After trawling the internet looking for ideas for. The heatgun goes about half way and the air is not even across the chip, thus not really reflowing the xbox. I read the posts on the 'net about baking it in the oven and hitting it with a heat gun. A Hack a Day reader needed a tool to solder a lot of SMD parts, so he built a DIY heat gun, and we’re impressed with the results. Answer: the difference between a real reflow and a heatgun reflow is: With a rework station the hot air coming out is directed on the chip you are working on at the temps that will get the solder under the chips to a liquid state. If I sent it off to be done for $400, I was concerned the problem would happen again down the road. I figured I had nothing to lose to try to reflow the board myself. (So, I was sure it was the logic board, not the video chip.) They are usually around 1000W and some have temperature control. These guns have all kinds of uses and are commonly used in construction to strip paint. If you have just a few parts you need to reflow, you can use a common heat gun available at most hardware stores for around 30. Turning it on only gave me a click (not really a click) sound and the sleep light came on for a couple seconds. A good hot air solder rework station costs well upwards of 100. My 2008 MBP 2.4Ghz had a failed logic board.
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