本文選題：低碳合金鋼CrNiMo　切入點(diǎn)：熱壓縮　出處：《鋼鐵》2017年08期

【摘要】：在DIL805A/T熱模擬機(jī)上對(duì)低碳合金鋼20CrNi2Mo進(jìn)行等溫單向熱壓縮試驗(yàn),研究了該鋼在溫度為900~1 050℃、應(yīng)變速率為0.001~1 s~(-1)條件下的應(yīng)變補(bǔ)償本構(gòu)方程及動(dòng)態(tài)再結(jié)晶行為,為探索塑性變形行為和組織控制提供理論指導(dǎo)。對(duì)應(yīng)變補(bǔ)償本構(gòu)方程進(jìn)行驗(yàn)證發(fā)現(xiàn),考慮應(yīng)變補(bǔ)償后得到的應(yīng)力值與試驗(yàn)值的線性相關(guān)系數(shù)R=0.992 1,平均相對(duì)誤差A(yù)ARE為3.019 2%;采用對(duì)θ-σ曲線進(jìn)行3次多項(xiàng)式擬和求解拐點(diǎn)的方法,建立了臨界動(dòng)態(tài)再結(jié)晶模型,并結(jié)合微觀組織分析了不同變形條件下動(dòng)態(tài)再結(jié)晶進(jìn)行的難易程度。結(jié)果表明,20CrNi2Mo鋼在試驗(yàn)條件范圍內(nèi)全部發(fā)生了動(dòng)態(tài)再結(jié)晶,且變形溫度越高,應(yīng)變速率越小,動(dòng)態(tài)再結(jié)晶進(jìn)行得越充分,并建立了Z參數(shù)動(dòng)態(tài)再結(jié)晶臨界應(yīng)力模型和臨界應(yīng)變模型。
[Abstract]:The isothermal unidirectional thermal compression test of low carbon alloy steel (20CrNi2Mo) was carried out on a DIL805A/T thermal simulator. The constitutive equation of strain compensation and dynamic recrystallization behavior of the steel were studied under the condition of temperature 900m 1050 鈩，

本文編號(hào)：1675258