研究X80实物弯管得出，其直管段有比弯曲段低的回火稳定性和优良的强韧特性。
The testing results of X80 pipeline bends show that the tangent end has lower temper stability and more excellent strength-toughness than bent region.
而最表层由于获得完全细化的马氏体组织，拥有较好的回火稳定性，与未偏磨面表层硬度相当。
However, because of fully granin refinement of martensite and good perfornance of temper resistance , the hardness of outer surface of worn side is equal to that of non-worn side.
由于马氏体这一淬硬钢主要成分的不稳定性，使得回火成为可能。
Tempering is possible because of the instability of the martensite, the principal constituent of hardened steel.
根据模型模拟结果表明，影响轴承钢硬化层尺寸稳定性的主要因素是残余奥氏体的含量和回火温度以及回火时间。
The results showed that the main factors, which affected dimension changing of GCr15, included residual austenite content, tempering temperature and tempering time.
根据模型模拟结果表明，影响轴承钢硬化层尺寸稳定性的主要因素是残余奥氏体的含量和回火温度以及回火时间。
The results showed that the main factors, which affected dimension changing of GCr15, included residual austenite content, tempering temperature and tempering time.
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