成分过冷 meaning in English

constitutional supercooling

For the fe - 2 % c - 4 % v - 4 % mo - 5 % cr - x % w alloy system , the peak value of quenching appears in 950 - 1100 . the peak value increases with the increment of w . when the content of w is 2 % , the temperature of temper hardening is 550 . for the fe - 2 % c - 4 % v - 4 % mo - 5 % cr - 2 % w alloy , the appropriate quenching temperature can be controlled in 1000 1050 and the time of preserving heat is 12min
57 （原于百分比，人分析表明， mg的变质作用的产生是由于mg影响了合金元素的偏析，使得基体组织中合金元素含量增加，相当于使合金分配系数k更偏离于1 ，从而促进了形成缩颈、晶粒繁殖和成分过冷倾向。