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一、受控冷却试验控制某种高合金球铁的冷却速度,使其按照近似于图1所示的温度规范进行冷却。浇注一个25mm的 Y 试块,内含 Ni1.5%,Cu1.0%,Mo0.5%,用插入式热电偶测温,在大约870℃时将油砂型打碎,使 Y 试块空冷到370℃,然后再放入用绝热材料做成的容器中保温。2小时以后,温度降到345℃,把铸件(Y 试块)拿出来空冷到室温。机械性能列于表1.其中延伸率与显微组织是非常重要的.这两项可
First, the controlled cooling test to control the cooling rate of a high alloy ductile iron, so that it is similar to the temperature shown in Figure 1 to regulate the cooling. Pour a 25mm Y test block containing Ni1.5%, Cu1.0% and Mo0.5%, measure the temperature with a plug-in thermocouple, and break the oil sand at about 870 ° C until the Y test block is air-cooled to 370 ℃, and then placed in a container made of insulating material insulation. After 2 hours, the temperature dropped to 345 ° C and the castings (Y test blocks) were taken out to air-cool to room temperature. The mechanical properties are given in Table 1. The elongation and microstructure are very important