可溶磷降低二水石膏脱水温度和液相过饱和度，使二水石膏晶体粗化，硬化体强度降低。
It reduces dehydration temperature and solubility of dihydrate gypsum, makes gypsum crystals thick and wide, and reduces the strength of hardened body.
力学性能测试结果表明，除在临界二相区加热外，二次热循环均使粗晶区得到初化。
The results show that toughness of the coarse grained HAZ is improved after second welding heat cycle except intercritical two-phase heating.
增钒使共晶碳化物明显粗化。
Eutectic carbide appear coarsening with increase of vanadium.
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