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焊接热循环的測量是研究焊接工作的基本手段,可以用来研究热源、金属的加热和冷却以及它們在焊接过程中所产生的影响。本文討論采用溫差热电偶和示波器来測量和記录焊接热循环的問題。一、測量用仪器测量焊接热循环的热电偶应符合下列几个要求:(1)高熔点;(2)产生的热电势要大;(3)热惰性小,稳定性好,能抗氧化和腐蝕。我們在試驗中选用了鉑-鉑铑熱电偶。近縫区选用鎳鎔-鎳鋁热电偶。图1为測量装置示意图,热电偶热端受热时,就产
The measurement of the welding thermal cycle is the basic means of studying the welding work and can be used to study the heat sources, the heating and cooling of the metal, and their effects during the welding process. This article discusses the use of thermocouples and oscilloscopes to measure and record welding thermal cycling issues. First, the measuring instrument measuring the thermal cycle thermocouple welding should meet the following requirements: (1) high melting point; (2) to generate a large thermoelectric power; (3) thermal inertia, good stability, anti-oxidation and corrosion. We selected platinum-platinum-rhodium thermocouples for our experiments. Near the seam area selection of nickel - nickel - aluminum thermocouple. Figure 1 is a schematic diagram of the measuring device, the hot end of the thermocouple heat, produced