It is considered that the V-N micro-alloy high carbon wire rods obtain the high strength and toughness mainly due to grain refining and precipitation strengthening.
研究认为钒氮微合金化硬线钢主要通过细晶强化和沉淀析出强化，从而提高钢材的强韧件。
2
Precipitation uplifts ground water level and weakens shearing strength of soil, thus results in large displacement in side direction.
大气降水抬升了地下水位，并削弱了土体的抗剪强度，从而使得土体的侧向位移迅速增大。
3
In addition, discontinuous precipitation often occurs in the later stage during aging, which caused the sharp decrease of many properties including strength and corrosion resistance.