發(fā)布時(shí)間：2018-07-10 06:21

  本文選題：藥芯焊錫絲 + 松香基助焊劑　； 參考：《華南理工大學(xué)》2015年碩士論文

【摘要】：無(wú)鹵素免清洗松香基助焊劑具有環(huán)保、安全和焊接可靠性高等優(yōu)點(diǎn),在無(wú)鉛焊錫絲中的應(yīng)用逐漸增多,但目前針對(duì)焊錫絲用無(wú)鹵素環(huán)保助焊劑的研究尚不多見(jiàn),缺乏能夠完全替代傳統(tǒng)高鹵素助焊劑的產(chǎn)品。本論文工作深入研究了助焊劑載體、活性劑、表面活性劑、高沸點(diǎn)溶劑和成膜性增塑劑組分對(duì)無(wú)鹵素免清洗松香基助焊劑性能的影響,并采用手工焊接方式對(duì)焊錫絲助焊劑進(jìn)行實(shí)際效果考察,最后對(duì)助焊劑配方體系進(jìn)行優(yōu)化。通過(guò)Sn-0.7Cu無(wú)鉛焊料的擴(kuò)展率、焊后表面絕緣電阻、最大分解壓力、正交試驗(yàn)、熱重法、煙霧量及刺激性等測(cè)試研究了載體、活性劑、表面活性劑、高沸點(diǎn)溶劑及成膜性增塑劑對(duì)松香基助焊劑活性的影響。研究結(jié)果表明:(1)以質(zhì)量比為2:3的125松香和無(wú)色氫化松香復(fù)配作為助焊劑載體時(shí),可賦予其擴(kuò)展率較高、煙霧量適中、最大分解壓力較小且焊后電氣性能優(yōu)異等優(yōu)勢(shì);(2)活性劑的最佳用量為4.0 wt%-6.0wt%,在優(yōu)選總量為5.0 wt%的條件下,采用丁二酸胺:癸二酸:戊二酸為1:2:6,不同活性梯度的有機(jī)酸及有機(jī)胺類活性劑復(fù)配有利于助焊劑獲得較寬的活性作用溫度區(qū)間,有效提升無(wú)鉛釬料對(duì)基底的潤(rùn)濕能力。(3)1.5wt%的氟碳類表面活性劑FSN-100加入量可以使助焊劑獲得較佳的潤(rùn)濕性能。(4)采用乙二醇丁醚為主,DBE為輔的高沸點(diǎn)溶劑,優(yōu)化后確定二者最佳比例為4:1,添加總量為3 wt%。將自制助焊劑制成無(wú)鉛藥芯焊錫絲,采用手工焊接方式檢驗(yàn)助焊劑的實(shí)際使用效果發(fā)現(xiàn)自制助焊劑具有上錫速度慢且飛濺略多等不足。通過(guò)尋找到一種高活性的碘酸鹽D2,添加0.7wt%含量到原助焊劑體系中,在兼顧其他性能方面的前提下可顯著提升焊接速度;添加成膜性增塑劑氫化松香甲基酯對(duì)無(wú)鉛焊錫絲的飛濺及焊后電氣性能都有較好的改善作用,其含量以7.0wt%為宜。將優(yōu)化后的助焊劑與合作公司及日本某知名品牌同類型的商品助焊劑進(jìn)行綜合性能對(duì)比,本研究自制助焊劑的綜合性能良好。
[Abstract]:Non-halogen cleaning rosin based flux has the advantages of environmental protection, high safety and high welding reliability, and its application in lead-free solder wire is increasing gradually. However, there are few researches on halogen free environmental flux for solder wire at present. There is a lack of products that can completely replace traditional high-halogen fluxes. In this paper, the effects of flux carrier, active agent, surfactant, high boiling point solvent and film-forming plasticizer on the properties of rosin based flux without halogen cleaning were studied. The actual effect of solder wire flux was investigated by manual welding, and the flux formulation system was optimized. The support, active agent and surfactant were studied by testing the Sn-0.7Cu lead-free solder, the surface insulation resistance, maximum decomposition pressure, orthogonal test, thermogravimetry, smoke content and irritability. Effects of high boiling point solvent and film forming plasticizer on the activity of rosin-based flux. The results showed that: (1) when 125 rosin with 2:3 mass ratio and colorless hydrogenated rosin were used as the flux carrier, the expansion rate was higher and the smoke content was moderate. (2) the optimum dosage of the active agent is 4.0 wt- 6.0 wt. under the condition of the optimum concentration of 5.0 wt%, the maximum decomposition pressure is small and the electrical properties are excellent after welding. The mixture of succinamide, sebacic acid and glutaric acid was 1: 2: 6. The combination of organic acids and organic amines with different activity gradients was beneficial to the flux to obtain a wide range of active action temperature. The wetting ability of lead-free solder on the substrate was improved effectively. (3) the fluid-carbon surfactant FSN-100 was added to the solder to obtain better wettability. (4) the high boiling point solvent supplemented by ethylene glycol butyl ether was used. After optimization, the optimum ratio is 4: 1 and the total addition is 3 wts. The self-made flux is made into lead-free flux-cored solder wire. It is found that the self-made flux has some shortcomings such as slow tin speed and a little more spatter and so on. By finding a highly active iodate D2 and adding 0.7 wt% to the original flux system, the welding speed can be significantly improved on the premise of taking other properties into account. The addition of hydrogenated rosin methyl ester has a good effect on the splashing of lead-free solder wire and the improvement of electrical properties after welding, and the appropriate content is 7.0 wt%. The comprehensive performance of the optimized flux is compared with that of the same type of commodity flux of the cooperative company and a famous brand in Japan. The comprehensive performance of the self-made flux is good.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TG42

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