大型铸锻件
大型鑄鍛件
대형주단건
HEAVY CASTING AND FORGING
2013年
5期
31-34
,共4页
45钢%高温拉伸试验%力学性能
45鋼%高溫拉伸試驗%力學性能
45강%고온랍신시험%역학성능
45 steel%high temperature tensile test%mechanical properties
在600~750℃范围内和0.5、0.7、0.8及0.9倍屈服荷载下,对45钢进行高温拉伸试验。结果表明,在恒温升载和不同试验温度下45钢的力学性能变化不大,随温度升高而下降的趋势基本一致;而恒载升温情况下,300℃之前应变变化比较平缓,300~500℃应变逐渐增大,550℃左右应变急剧增大至颈缩。
在600~750℃範圍內和0.5、0.7、0.8及0.9倍屈服荷載下,對45鋼進行高溫拉伸試驗。結果錶明,在恆溫升載和不同試驗溫度下45鋼的力學性能變化不大,隨溫度升高而下降的趨勢基本一緻;而恆載升溫情況下,300℃之前應變變化比較平緩,300~500℃應變逐漸增大,550℃左右應變急劇增大至頸縮。
재600~750℃범위내화0.5、0.7、0.8급0.9배굴복하재하,대45강진행고온랍신시험。결과표명,재항온승재화불동시험온도하45강적역학성능변화불대,수온도승고이하강적추세기본일치;이항재승온정황하,300℃지전응변변화비교평완,300~500℃응변축점증대,550℃좌우응변급극증대지경축。
High temperature tensile tests are performed for 45 steel at the temperature range of 600~750 ℃ and under the yield load of 0.5,0.7,0.8 and 0.9 times.The results show that the mechanical properties of 45 steel are changed little under the rising loadings at the constant temperature with different test temperatures , and the downward trend are basically the same with the temperature rising .In the case of rising temperature under the constant loading , the strain changes gently before 300℃, increases gradually between 300℃and 500℃, and increases sharply to neck-ing around 550 ℃.