在不增加结构金属消耗的前提下,提高车辆承载件的可靠性,可以通过采用具有高强度特性的钢材来达到。这种钢材还要具有足够的塑性,好的可焊性和低温冲击韧性。在苏联和国外都在研究能满足上述要求的高强度低合金钢(σ_T≥40公斤/毫米~2)。在这种情况下,人们找到了一些廉价的化学元素,它们或者能保证高的热强化性能,或者在按一般规范进行热轧后能达到所要求的性能。本文列举了含锰和含微量铌的高强度低合金钢的性能试验结果。铌,这是一种活性 Without increasing the structural metal consumption, improving the reliability of the vehicle’s bearing can be achieved by using steel with high strength properties. This steel should also have sufficient plasticity, good weldability and low temperature impact toughness. In the Soviet Union and abroad are studying to meet the above requirements of high strength low alloy steel (σ_T ≥ 40 kg / mm ~ 2). In this case, people find some cheap chemical elements, which can either ensure high thermal strengthening properties, or achieve the desired properties after hot rolling as per the general specifications. This article lists the performance test results of high strength low alloy steel containing manganese and niobium. Niobium, which is an activity