FIELD: metallurgy, namely thermal-chemical working, possibly for surface hardening of tools and machine parts.;SUBSTANCE: method comprises steps of preliminarily working and boronizing. Preliminary working is performed by means of electron beam in vacuum (P=2 x 10-3Pa) for 30 s at specific power ( 4 - 5) x 104 Wt/cm2. Boronizing is realized at temperature 940°C for 3 h in container having melting lock and filled with saturating mixture containing 97% of B4C and 3% of KBF4.;EFFECT: boronizing process providing surface hardening of tools, lowered brittleness of boride layer with increased thickness, reduced stresses in boride zone.;1 tbl, 2 ex
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机译：领域：冶金，即热化学加工，可能用于工具和机械零件的表面硬化。;实质：该方法包括预加工和硼化的步骤。借助于电子束在真空中（P = 2 x 10 -3 Pa）在特定功率（4-5）x 10 4 Wt上进行30 s的初步工作。 / cm 2 。硼化是在具有熔化锁并充满含有97％的B 4 C和3％的KBF 4 的饱和混合物的容器中在940℃的温度下进行3小时。效果：渗硼工艺提供了工具的表面硬化处理，降低了硼化物层的脆性，增加了厚度，减少了硼化物区中的应力。; 1 tbl，2 ex
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