Borlash
Borlash — poʻlat yoki boshqa metalldan tayerlangan buyumlar sirtini bor bilan toʻyintirish. B. natijasida buyum sirti qattiqlashadi, issiqqa va yeyilishga chidamliligi oshadi. Detalni suyuqlantirilgan bura (Na2B4O7) ga botirib, elektroliz usulida (detalkatod, grafit—anod) B. usuli koʻproq qoʻllanadi. Detal suyuq burada 6—8 soat saqlangach (930° da), uning 0,15— 0,25 mm sirtqi qatlami borga toʻyinadi. Baʼzan, buraga bor karbid (30— 40%) yoki kremniy karbid (30%) qoʻshiladi. B. vakuum pechda yoki gaz muhitida ham oʻtkazilishi mumkin. Borlangan detallar maxsus usulda toblanadi. B. usuli nasoslarning vtulkalari, shtamplar, pressqoliplar, roliklar va boshqa tayyorlashda qoʻllanadi.
Adabiyotlar
- OʻzME. Birinchi jild. Toshkent, 2000-yil
 | Ushbu maqolada Oʻzbekiston milliy ensiklopediyasi (2000-2005) maʼlumotlaridan foydalanilgan. |
 | Ushbu maqola chaladir. Siz uni boyitib, Vikipediyaga yordam berishingiz mumkin. Bu andozani aniqrogʻiga almashtirish kerak. |
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