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液态合金的质量是影响铸件质量的最直接最主要的因素之一,在炉前对液态合金的质量进行快速检验对于铸造生产有着重要意义。铸钢含碳量对于铸钢件的机械性能和铸造性能有较大影响,炉前科学、快速、准确地测量钢水含碳量是控制铸钢件质量的一个重要手段。以往的钢水定碳装置有的不够科学,其测试精度取决于测试者的经验:有的不够迅速,达不到在线快速测量的要求;有的测试成本高,使多数工厂难以承受。因此,有必要研制新的钢水定碳仪。本文所述的钢水炉前快速定碳仪以热分析法为基本原理,通过测量钢水的初晶温度,达到钢水定碳的目的。在此基础上,研制了结构新颖的取样系统和精度较高的单片机测量系统。取样系统有热取样和冷取样两种,测试者可根据实际情况选择其一。热取样系统由一次性样杯、耐热石英管、永久性热电偶、样杯支架和快接式手柄构成。冷取样系统由一次性样杯、耐热石英管、永久性热电偶和样杯座构成。具有响应速度快、测试精度和成本低等特点,单片机测量系统以低功耗的单片微型计算机为核心,配以用于实现信号处理,数据存储,结果显示等功能的低功耗器件,构成一台便携式测试仪器。仪器不仅体积小、重量轻,而且可用充电电池供电,便于携带、易于操作。用于炉前测定钢水含碳量,可在5～20秒时间内显示?
The quality of liquid alloy is one of the most direct and important factors affecting the quality of castings. The rapid inspection of the quality of liquid alloy in front of the furnace is of great significance to the casting production. The carbon content of cast steel has a great influence on the mechanical properties and casting performance of cast steel. Pre-furnace science, measuring carbon content of molten steel quickly and accurately is an important means to control the quality of steel castings. Some of the previous devices for determining molten steel were not scientific enough. The accuracy of the test depends on the experience of the tester: some are not fast enough to meet the requirements of online rapid measurement; and some are costly to test that make them unbearable in most factories. Therefore, it is necessary to develop new molten steel carbon gauge. The rapid determination of carbon before the molten steel described in this paper based on the principle of thermal analysis, by measuring the temperature of primary crystallization of molten steel to achieve the purpose of molten steel carbon. On this basis, a novel sampling system and a single-chip measurement system with high precision are developed. Sampling system has two kinds of hot sampling and cold sampling, the tester can choose one according to the actual situation. The thermal sampling system consists of disposable cups, heat-resistant quartz tubes, permanent thermocouples, sample cup holders and quick-connect handles. Cold sampling system consists of disposable cups, heat-resistant quartz tube, permanent thermocouple and cup holder. With the characteristics of fast response, low test accuracy and low cost, the single-chip microcomputer measurement system uses the low-power single-chip microcomputer as the core and low-power devices for signal processing, data storage and result display, A portable test equipment. The instrument not only small size, light weight, but also rechargeable battery-powered, easy to carry, easy to operate. Used to determine the carbon content of the molten steel can be displayed within 5 to 20 seconds?