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Prevention of particle embrittlement in grain-refined, high- strength steels
Prevention of particle embrittlement in grain-refined, high- strength steels
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机译:防止晶粒细化的高强度钢发生颗粒脆化
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摘要
A process for improving the impact properties of high-strength steels containing grain-refining additions is disclosed along with a product made in accordance therewith. The process comprises a pretreatment step involving heating and hot deformation at a temperature preferably in excess of the solution temperature of the least soluble nitride or carbonitride species present in the steel (T ≧≈1200° C.) followed by accelerated cooling, such as by water quenching, oil quenching, or forced-air cooling. Thereafter, the material is subjected to a subcritical annealing treatment (≈700° C.), austenitized at low-to-moderate temperatures of between about 850°- 950° C., and then quenched and tempered.
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