nitrogen protection

some influencing factors of application of lead-free soldering technology are investigated, such as choice of lead-free solder and components, application design of pcb, improvement of reflow soldering temperature curve, reflow soldering by nitrogen protection, optimization of technology.

对无铅焊接技术应用中的无铅焊料选择、元器件选定、印制电路板（PCB）应用设计、再流焊温度曲线改善、氮气保护再流焊、工艺控制与优化等进行了具体分析和研究。

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energy-saving designment and analysis of nitrogen protection push kiln

氮气氛保护推板窑节能设计分析

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Nitrogen protection can improves wettability of lead-free solder and solder joint quality.

氮气保护可以改善无铅钎料的润湿性,提高焊点质量.

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during lead-free soldering, the oxidation rate is very high, so it is preferable to use nitrogen protection.

因为在进行无铅焊接的时候，无铅锡很容易被氧化，所以炉体内需要氮气进行保护。

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nitrogen protection's effect on solder joint appearance in lead-free reflow soldering

氮气保护对无铅再流焊焊点外观质量的影响

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nitrogen protection: apply nitrogen to detect the oxygen amount contained in the machine online ensuring the safe operation.

氮气保护系统：采用氮气保护以保证机器在安全的环境下运行。

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and sintering under nitrogen protection.

在氮气保护下烧结。

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After the investigation of the storage stability of oil during process flow, it is suggested to short the storage duration of feedstock tank in furfural refining unit and establish the nitrogen protection system while the conditions exist.

对生产工艺流程中油品储存安定性进行了考察，建议缩短糠醛溶剂精制装置原料罐的储存时间，有条件时增设氮气保护系统。

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research on effective nitrogen protection in straw decomposition

秸杆腐解过程中有效氮保护的研究

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The electric control system based on network for the nitrogen protection kiln is presented.

介绍了一种基于网络的氮窑电气控制系统，该系统以可编程控制器（PLC）为核心，通过3条现场网络实现氮窑电气系统的分布式控制。

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brief description of nitrogen protection and pressurized ventilation

氮气保护和正压通风法简述

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nitrogen protection is used in practical industry because of poor wettability of lead-free solder.

由于无铅钎料润湿性较差，在实际生产中普遍采用氮气保护。

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