本文選題：硼鋼　切入點：熱沖壓　出處：《工程科學(xué)學(xué)報》2017年12期

【摘要】：為了研究熱沖裁零件微觀組織及尺寸精度的變化規(guī)律,采用不同的沖裁溫度和模具間隙比對B1500HS鋼板進(jìn)行了熱沖裁試驗.根據(jù)冷卻曲線,研究了沖裁溫度對硼鋼組織轉(zhuǎn)變和零件力學(xué)性能的影響;根據(jù)落料件的尺寸,分析了沖裁溫度和模具間隙比對尺寸精度的影響;通過觀察零件的斷口形貌,分析了沖裁溫度對斷口質(zhì)量的影響.結(jié)果表明:當(dāng)沖裁溫度一定時,落料件的尺寸隨著模具間隙比的減小而增大;當(dāng)模具間隙比一定時,落料件的尺寸誤差隨著沖裁溫度的降低出現(xiàn)"正—負(fù)—正"的增長波動趨勢;當(dāng)沖裁溫度為600~650℃或750~800℃時,落料件具有較高的沖裁精度;落料件的硬度隨著沖裁溫度的升高而增大,當(dāng)沖裁溫度為650~800℃時,落料件的組織為馬氏體,硬度值HV約為550;沖裁斷面光亮帶的寬度隨著沖裁溫度升高而增大.
[Abstract]:In order to study the variation rule of microstructure and dimensional precision of hot blanking parts, hot blanking tests were carried out on B1500HS steel sheet with different blanking temperature and die clearance ratio. The effect of blanking temperature on the microstructure transformation and mechanical properties of boron steel was studied. According to the size of blanking parts, the effects of blanking temperature and die clearance ratio on dimensional accuracy were analyzed. The effect of blanking temperature on fracture quality is analyzed. The results show that the size of blanking parts increases with the decrease of die clearance ratio when the blanking temperature is constant, and when the die clearance ratio is fixed, The size error of blanking parts fluctuates "positive-negative-positive" with the decrease of blanking temperature, and when the blanking temperature is 600 ~ 650 鈩，

本文編號：1689150