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调质钢是机械制造业如飞机、汽车、拖拉机、柴油机及机床等工业中用量最大用途最广的金属材料。而调质钢件热处理后硬度的作快速无损检测是国内外尚未解决的一大难题。为此,我们选用第二汽车制造厂生产的40Cr连杆螺栓典型调质件和牡丹江标准件厂生产的45号钢螺栓为试验钢件。经过反复试验,确认用“TGY型钢铁硬度电磁无
Quenched and tempered steel is the most widely used metal material in machinery manufacturing industries such as aircraft, automobiles, tractors, diesel engines and machine tools. The quenching and tempering steel hardness after the rapid non-destructive testing is unresolved a major problem at home and abroad. To this end, we use the second car factory production 40Cr connecting rod bolt typical conditioning and Mudanjiang Standard Factory 45 steel bolts for the test steel. After repeated tests, confirm the use of "TGY-type steel hardness electromagnetic no