球化退火冷卻速度對(duì)釬具用23CrNi3Mo合金管組織與硬度的影響

Effect by Spheroidization Anneal Cooling Rate on Microstructure and Hardness of 23CrNi3Mo Alloy Pipe for Drilling Tool Service

摘要: 為解決釬具用23CrNi3Mo合金管冷軋變形抗力過(guò)高的問(wèn)題，對(duì)其進(jìn)行球化退火處理研究，以降低合金的硬度。借助掃描電鏡（SEM）和硬度等表征手段，揭示23CrNi3Mo合金管球化退火處理后的微觀組織演變規(guī)律和硬度變化情況。試驗(yàn)結(jié)果表明：在680℃下進(jìn)行球化退火，23CrNi3Mo合金形成顆粒狀碳化物，隨著冷卻速度的降低，碳化物直徑不斷增大；球化退火后，23CrNi3Mo合金鋼硬度顯著降低，進(jìn)而達(dá)到冷軋變形的要求。

Abstract: To solve the problem of high cold-rolling deformation resistance of the 23CrNi3Mo alloy pipe for drilling tool service, a study is made, which involves spheroidization annealing of the tube so as to reduce the hardness of the alloy.Revealed, with the help of scanning electron microscope(SEM)and the characteristics like hardness, are the regularity of the microstructure evolution and the change of hardness of the 23CrNi3Mo alloy tube as spheroidization annealed.Relevant test results show that as being spheroidization annealed at 680℃, the 23CrNi3Mo alloy has its microstructure getting into granular carbides, and along with reduction of the cooling rate, diameter of the carbide is getting bigger and bigger;and that after spheroidization annealed, the said alloy has its hardness remarkably reduced, and in turn the required cold-rolling deformation is obtained.