【摘要】：經成分優(yōu)化獲得一種新型的貝氏體軸承鋼GCr15SiMoAl,通過鹽浴等溫淬火不同時間及油淬工藝獲得不同的組織,利用Gleeble3500研究了試驗用鋼充氫前后的壓縮變形行為,并與常規(guī)的GCr15軸承鋼進行了對比。結果表明,GCr15SiMoAl軸承鋼經0.5h等溫獲得了貝氏體鐵素體、殘留奧氏體及馬氏體的復合組織,其綜合壓縮性能最好;隨著鹽浴等溫時間的延長,抗壓強度逐漸降低,相對壓縮率先升高后降低。且GCr15SiMoAl軸承鋼在所有工藝下獲得的性能均優(yōu)于傳統(tǒng)的GCr15軸承鋼。氫對軸承鋼的抗壓強度影響較小,但是由于氫會促進殘留奧氏體發(fā)生應變誘發(fā)馬氏體轉變,嚴重降低了軸承鋼的塑性。
[Abstract]:A new type of bainitic bearing steel GCr15SiMoAl, was obtained by optimizing its composition. Different structures were obtained by salt bath isothermal quenching at different time and oil quenching process. The compressive deformation behavior of experimental steel before and after hydrogen filling was studied by Gleeble3500. And compared with conventional GCr15 bearing steel. The results show that the bainite ferrite, retained austenite and martensite composite structure are obtained by isothermal isotherm of GCr15SiMoAl bearing steel for 0.5 h, and its comprehensive compression properties are the best. With the prolongation of the isothermal time of salt bath, the compressive strength decreases gradually, and the relative compression increases first and then decreases. The performance of GCr15SiMoAl bearing steel is better than that of traditional GCr15 bearing steel. Hydrogen has little effect on the compressive strength of bearing steel, but the plasticity of bearing steel is seriously reduced because hydrogen can promote the strain induced martensite transformation of residual austenite.
【作者單位】： 燕山大學亞穩(wěn)材料制備技術與科學國家重點實驗室;洛陽LYC軸承有限公司;
【基金】：國家高技術研究發(fā)展計劃資助項目(“863”計劃,2012AA03A504) 河北省高等學�？茖W技術研究項目(QN2015100) 燕山大學青年教師自主研究計劃項目(15LGB006)
【分類號】：TG142.1;TG161
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本文編號：2380382