按照美国材料与试验协会制定的ASTM A255-10 Standard Test Methods for Determining Hardenability of Steel, 计算了45H钢、40CrH钢、42CrMoH钢、20CrNi2MoH钢、40MnBH钢、20MnVBH钢和17CrMnBH钢7个钢种的66个淬透性节点。结果表明:与我国国家标准相比, 有42个数据差值超过3 HRC, 错误率为64%; 14条淬透性曲线中, 13条曲线的节点数据差值超过3 HRC, 1条曲线的节点数据无法计算。计算结果证明该标准部分内容不正确, 建议更正该标准中的表14、表16、表18, 改进表11。

According to ASTM A255-10 Standard Test Methods for Determining Hardenability of Steel established by American Society for Testing Materials, 66 hardenability nodes of seven kinds of steels (45H steel, 40CrH steel, 42CrMoH steel, 20CrNi2MoH steel, 40MnBH steel, 20MnVBH steel and 17CrMnBH steel) were calculated. The results show that: compared with Chinese national standard, there were 42 data difference exceeding 3 HRC, and the error rate was 64%; among the 14 hardenability curves, there were 13 curves of which the node data difference exceeded 3 HRC, and 1 curve which cannot be calculated. Calculation results showed that partial content of this standard was not correct. It was suggested to correct table 14, tables 16, table 18 and improve table 11.