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6种工业用合金工具钢及7种WC-Co烧结合金维氏硬度(H)与温度(T)关系的研究表明,经淬火—回火二次硬化处理的工具钢,在回火温度以下,可逆软化与温度呈线性关系,且各高速钢可逆软化系数很接近;提出了计算高速钢500℃以下硬度的简易公式。高于回火温度时,工具钢H—T关系复杂化,但直到700℃,影响高温硬度的主要因素仍然是热处理(二次硬化)达到的室温硬度。WC-Co烧结合金的硬度在800℃以下和温度呈线性关系,当Co≤20％时,与钴含量也呈显著的线性关系;提出了由室温硬度或钴含量(3％—20％)计算800℃以下硬度的简易公式。
The relationship between Vickers hardness (H) and temperature (T) of six kinds of industrial alloy tool steels and seven kinds of WC-Co sintered alloys shows that the hardened-tempered secondary hardened tool steels are below the tempering temperature, Reversible softening and temperature are linear, and the reversible softening coefficient of each high-speed steel is very close. A simple formula for calculating the hardness of high-speed steel below 500 ℃ is proposed. Higher than the tempering temperature, the tool steel H-T relationship is complicated, but up to 700 ℃, the main factor affecting the high temperature hardness is still the heat treatment (secondary hardening) reached the room temperature hardness. The hardness of WC-Co sintered alloy has a linear relationship with the temperature below 800 ℃. When Co≤20%, it shows a significant linear relationship with the content of cobalt. The hardness of WC-Co sintered alloy is calculated from the room temperature hardness or cobalt content (3% -20%) A simple formula of hardness below 800 ℃.