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一、概述由沈阳机电学院研究设计、辽阳文圣仪表厂试制的D型湿砂型表面硬度计〈以下简称D型硬度计〉已于一九八四年七月通过技术签定。D型硬度计是用来测定湿型表面硬度的仪器,它适用于铸造生产中,常用高、中、低比压,各种造型方法和各类粘土型砂砂型表面硬度的测试。D型硬度计可以以一代三,即可用D型取代A、B、C三种硬度计。同A、B、C型硬度计相
First, an overview by the Shenyang Institute of Mechanical and Electrical Design, Liaoyang Wensheng Instrument Factory trial production of D-type wet sand surface hardness tester (hereinafter referred to as D-type hardness tester) in July 1984 through the technical sign. D-type hardness tester is used to determine the wet surface hardness of the instrument, which is suitable for casting production, commonly used in high, medium and low pressure, a variety of modeling methods and various types of clay sand sand surface hardness test. D-type hardness tester can be a generation of three, that is, available D-type to replace A, B, C three kinds of hardness. With A, B, C type hardness tester phase