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使用低珠光体钢、且含C量<0.12％时具有优越的耐冷性、足够的强度和良好的可焊性,铸件可以水淬。但过去,对此材料的研究却不够。为此,苏联对表中所示的铸钢进行了研究。图1(a)为钢淬火后,C、Mn和Cr对钢产生的影响,(b)为淬火和回火(650℃)时的影响(1──σ_b,2──σ_T,,3──δ,4──ψ)。图2为淬火后这些元素对a_H的影响(1,3)及淬火和650℃回火后的影响(2,4),1,2──试验温度+20℃;3,4──-60℃。随着C、Cr、Mn的增加,淬火钢的强度也随着
The use of low pearlite steels with excellent cold resistance, adequate strength and good solderability with C content <0.12% allows the casting to be water-quenched. But in the past, the research on this material was not enough. For this purpose, the Soviet Union studied the castings shown in the table. Figure 1 (a) shows the effect of C, Mn and Cr on steel after quenching of steel, and (b) on quenching and tempering (650 ℃) (1──σ_b, 2──σ_T ,, 3 ─ δ, 4 ─ ─ψ). Figure 2 shows the effect of these elements on a_H after quenching (1,3) and after quenching and tempering at 650 ° C (2, 4), 1,2──test temperature + 20 ° C; 3,4──-60 ℃. With the increase of C, Cr, Mn, the strength of hardened steel also follows