浆状冷却介质的特性和用途

研究了以水和微细粘土粉末等混合而成的浆状介质的稳定性、冷却特性其影响因素。比较发现，浆状介质具有高于风冷而低于普通机油的冷却速度，可用于一些高合金钢的淬火冷却、铝合金固溶处理，也可用于结构钢工件做等温正火冷却。提出了两种新的淬火冷却方法：（1）先水或水溶液而后浆状介质的双介质淬火方法；（2）工件在浆状介质中先做摆动以加快冷却，而后再停止摆动以防止淬火方法。浆状介质完全不污染环境，使用浆状介质成本极低，值得推广应用。

Characteristics and Uses of Muddy Quenching Media

The present paper investigates the stability,cooling characteristics and the effecting factors of a muddy quenching medium,a mixture of water and fine clay powders.Comparisons show that the cooling rate of the muddy quenching medium is higher than that of wind cooling,while lower than that of oil,thus it can be used for quenching certain high alloy steels,solution treatment of aluminum alloys,and also for isothermal normalizing of structural steel components.Two new quenching methods are proposed as follows:1.Interrupted quenching,whereby the work-piece is first cooled in water or a water-based solution,then cooled in the muddy quenching medium,2.The work-piece is first cooled by swinging in the muddy quenchant for fast cooling,then kept still to avoid cracking.The muddy quenching mendium is environmentally non-pollutant,the costs of its use are especially low,therefore its use is worth advertising.