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<span class="lemmaTitleH1" style="height: auto; padding: 0px 0px 5px; display: inline;">9Cr2Mo</span></h1>
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<span class="lemmaTitleH1" style="height: auto; padding: 0px 0px 5px; display: inline;">热处理：</span></p>
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<span class="lemmaTitleH1" style="height: auto; padding: 0px 0px 5px; display: inline;">物理性能</span></p>
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<span style="color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif; font-size: 14px; line-height: 24px; text-indent: 2em;"> 1、球化退火：790~810℃加热，650~670℃℃等温，≤500℃出炉空冷；</span></p>
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2、淬火：加热温度=880~900℃，淬火冷却：根据不同的工件结构，不同的要求，可以采用水、PAG淬火液、油等冷却介质。</div>
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注：此材料为典型的Cr2系冷轧辊用钢。</div>
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3、临界点温度 (近似值)：Ac1 =740°C 、 Ar1 =700°C、 Accm :850°C</div>
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4、冷压毛坯普通软化规范：(820±10)°c ×3 ~4h, 以.≤15°C /h的冷却速度, 随炉缓冷至≤650°C, 出炉空冷。</div>
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5、冷压毛坯等温球化软化规范：(820±10)°C ×3 ~4h, (720 ±10) °C ×6 ~8h, 再随炉缓冷至≤600°C, 出炉空冷。处理前硬度≤217HBW, 处理后硬度≥170HBW。</div>
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6、正火规范：正火温度 900 ~920°C, 硬度 302 -388HBW。</div>
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7、成批等温球化退火规范：790 ~810°C ×2 ~3h, 炉冷, 7O0 -720°C ×3 ~4h, 硬度≤217HBW, 珠光体组织2-5 级, 网状碳化物等级≤2 级。</div>
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8、淬火、回火规范</div>
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1) 淬火温度 830 - 850°C, 硬度 62 ~65HRC, 回火温度 130 ~150°C, 硬度 62 ~65HRC。</div>
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2) 淬火温度 840 ~ 860°C, 硬度 61~63HRC, 回火温度 150 ~170°C, 硬度 60 ~62HRC。</div>
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化学成分：</div>
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碳C:0.85～0.95；</div>
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铬Cr:1.70～2.10；</div>
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锰Mn:0.20～0.35；</div>
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钼Mo:0.20～0.40；</div>
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镍Ni:≤0.25；</div>
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磷P:≤0.025；</div>
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硫S:≤0.025；</div>
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硅Si:0.25～0.45</div>
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