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低碳普通钢或合金钢经强烈淬火形成低碳马氏体组织后,具有强度高和塑性、韧性好的优点,可以代替一部分渗碳和中碳合金钢制作工件。近年来我国机械部门大力推广这种工艺。以下列举一些单位对所用工件进行热处理后得到试验数据,如表1所示。 A3、20号钢原破坏强度仅38～42公斤/毫米~2,经处理后可达106.7～149公斤/毫米~2,为原值的2.7～3.5倍,并提高了韧性。我局对一些A_3钢试件进行处理,得到以下结果: 1.热处理后工件的性能截面为30×6毫米,长200～300毫米的A_3钢条,热处理前的破坏拉力为43公斤/毫米~2。热处理后在100公斤/毫米~2左右的拉力下仍未破坏(见表2)。 2.带电作业工具鱼头前后卡鱼头前后卡(图
Low-carbon ordinary steel or alloy steel after quenching to form low-carbon martensite, with high strength and plasticity, good toughness, can replace part of the carburizing and carbon steel alloy workpiece. In recent years, China’s machinery sector to promote this technology. The following list of some units of the workpiece after the heat treatment obtained after the test data, as shown in Table 1. A3,20 steel original destruction strength of only 38 ~ 42 kg / mm ~ 2, after processing up to 106.7 ~ 149 kg / mm ~ 2, 2.7 ~ 3.5 times the original value and improve the toughness. I Bureau of some A_3 steel specimens were processed, the following results: 1. After the heat treatment of the workpiece performance section 30 × 6 mm, length 200 ~ 300 mm A_3 steel bar, the pre-heat damage rupture force of 43 kg / mm ~ 2. After heat treatment in 100 kg / mm ~ 2 or so under the tension has not been destroyed (see Table 2). 2. Live working tools before and after the fish head around the card head card (Figure