The function of material is not pure depend on the sort of material and composition, change the organization of material interior through heat treatment and exterior modified, will change material property substantially. For example: High-speed steel is in anneal condition hardness not prep above 280HB has quite good plasticity and tenacity, quench there are very tall hardness, red rigid and wearability after temper in the course. Because dissolve enters the brilliant granuality of the content of the alloying element in matrix and austenite to be mixed,quench temperature is concerned, its trend is hardness, red rigid is followed quench temperature rises and rise, tenacity drops subsequently, intensity is after rising first, fall (graph 1) . Use this kind of law, can choose respective first-rate to quench according to the use characteristic of different cutting tool and mould temperature (watch 1) , the blade ministry of car cutting tool and knife handle are thicker, not tall to strength demand, bear concussion load is lighter, can use those who be close to Yu Rong to nod to quench temperature, make as far as possible much alloying element and carbolic dissolve enter austenite in, raise red rigid and wearability thereby. The point when broach bore cools not easily, the hope raises his as far as possible red rigid, but to prevent twist off, broach needs to have relatively high strenth, accordingly its quench temperature slightly under lathe tool. The use characteristic of milling cutter and mould chooses respective first-rate to quench temperature (watch 1) , the blade ministry of car cutting tool and knife handle are thicker, not tall to strength demand, bear concussion load is lighter, can use those who be close to Yu Rong to nod to quench temperature, make as far as possible much alloying element and carbolic dissolve enter austenite in, raise red rigid and wearability thereby. The point when broach bore cools not easily, the hope raises his as far as possible red rigid, but to prevent twist off, broach needs to have relatively high strenth, accordingly its quench temperature slightly under lathe tool. Milling cutter and the blade that wring a knife

Previous:Which a few kinds does tall manganese steel have? Its function how?
Next：Bedspring avoids shake shoe