How many degrees of low temperature can solder wire withstand?

Tin cannot work at low temperatures.

The phenomenon of gray tin crumbling into powder at low temperatures. The common metal tin is white tin (tin), which begins to transform into its allotrope gray tin (tin) at a lower level, but the transformation rate is very slow, and it is not until it is cold to 30 40 to reach the maximum transformation rate. When tin (density gram cm3) is transformed into tin (density gram centimeter 3), the volume increases by about 20 and it crumbles into powder.

Small amounts of impurities such as aluminum, copper, magnesium, manganese, and zinc contained in tin can accelerate this transition; The impurities such as bismuth, lead, antimony, silver, and gold can slow down the transformation, and when the content increases to a certain amount, it can even inhibit the occurrence of the transformation. In order to avoid the occurrence of tin plague, the temperature of tin in the process of storage and transportation should not be too low, and tin containers or soldering containers should not be used in cold areas. Powdered gray tin can be remelted into white tin.

The solder wire produced by Xinghongtai is made of pure tin raw materials from Yunnan tin ore to ensure the high quality of tin wire products, and the low temperature resistance of the solder point exceeds -50.

Ordinary solder wire.

-40 degrees Celsius.

After the welding is completed, the solder joints do not change.

-40 degrees Celsius.

It's something we've tested before.

I don't know how much solder wire can withstand.

The temperature of the tin soldering iron is 320 400 degrees; The optimal temperature of soldering iron is 280 plus or minus 10 degrees.

The maximum temperature is generally 480 degrees Celsius, which is generally set to about 320 400 degrees, and then it will cause the soldering iron tip to oxidize.

Usually the melting point of the solder line: 183 -215 (about 361 -419).

Normal operating temperature: 270 -320 (about 518 -608).

Production line operating temperature: 300 -380 (about 572 -716).

Solder absorption working temperature (small solder joint): 315 (about 600 °).

Solder absorption working temperature (large solder joint): 400 (about 752).

The operation control is relatively good:

1. When the solder wire is soldered, the temperature should be effectively controlled, so as to ensure that the solder wire has a relatively good soldering effect. When soldering the solder wire, the appropriate solder wire should be avoided in the tin pot, connected to the tin pot, the power switch should be turned over and the temperature should be adjusted to about 250 degrees Celsius, and the solder wire should be used to coat the red heating tube to ensure that the entire tin surface can completely cover the heating tube. When the solder wire is melted, the appropriate amount of solder wire should be added to ensure that the tin surface is at a suitable temperature.

2. When the solder wire is in use, if there is still solder wire in the tin furnace, do not block the heating power supply of the tin melting furnace, and the temperature should be properly controlled at this time, and the temperature should not be too high to avoid accelerating the oxidation reaction of the tin surface. Generally, we can control the temperature of 63 67 solder wire at about 250 degrees Celsius, 50 50 solder wire at about 280 degrees Celsius, and 30 70 solder wire at about 300 degrees Celsius.

3. When the temperature of the tin pot of the solder wire is investigated, it should not simply investigate the appearance of the solder pot itself, which will only form a relatively large error, and a special thermometer should be used to pierce the tin pot for testing, and the working temperature of the general high-temperature solder wire should be controlled within 400-500 degrees Celsius, assuming that the temperature does not reach the question, it will form a continuous welding and the solder joint is not bright. Therefore, when using solder wire for soldering, the temperature should be strictly controlled, so as to ensure that the welding quality of solder wire is <>

The melting point of the solder wire is 183. Capacitors and other components are welded in a temperature range of around 235 to 255.

When we usually talk about solder, we refer to the solder alloy of tin-lead or tin-silver-copper, and under normal circumstances, the melting point of tin is.

Generally speaking, the melting point of tin bar alloy is lower than that of any of the constituent metals Taking leaded solder (tin content 63%, lead content 37%) as an example, the melting point of leaded solder is about 183. And the melting point of lead-free solder is (tin, copper or so. Fierce Minsan.

1. The welding rod materials used are different. The electrodes used in high-temperature soldering are solder rods that add silver, antimony, or lead to a solder alloy. The electrode used in low-temperature solder is a solder rod formed by adding bismuth, indium, and cadmium to the solder alloy.

2. The scope of application is different. High-temperature solder is mainly used for component assembly that does not change during motherboard assembly; Low-temperature solder is mainly used for the assembly of parts with low heat resistance, such as microelectronic sensors.

3. The temperature is different. The actual operating temperature of high-temperature soldering is above 220 degrees, and the actual operating temperature of low-temperature soldering is below 200 degrees.

Landlord, I don't know what your definition of low temperature and high temperature is, the so-called temperature generally refers to the melting point. In the industry, SN63, which is 183 degrees, is generally used as a normal indicator. A melting point lower than 183 is generally called low temperature.

Those higher than him are called high temperatures, and of course, the melting point of lead-free solder wire is generally higher than 183, which is another matter.

Low-temperature solder wire is mainly used in some temperature-sensitive device products, in order not to damage sensitive devices, such as some lightning protection products.

High-temperature solder wire, high-temperature environment operation, mostly used in underground operation products, oil well equipment, coal mine equipment, as well as some electrical products, boiler products or something.

Generally, the lowest melting point of low melting point soldering is generally applicable in the range of 58 degrees to 165 degrees.

High temperature, that is, high melting point, generally 210-318 degrees range, there are solder melting points that match different applications.