Сварочные электроды МР-3 — параметры и использование

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электроды мр 3

Сварочные электроды “МР-3” являются очень популярными и востребованными среди потребителей. Они используются как на производствах, так и в домашнем хозяйстве. Их предпочитают многие сварщики благодаря их отличным сварным качествам и невысокой цене.

Электроды данной марки предназначены для ручной сварки сталей с малым уровнем легирования. Шов, сформированный с их помощью, будет иметь хорошие механические свойства и высокую стойкость ко внешним воздействиям.

“МР-3” создаются в полном соответствии с ГОСТом Э46 и сертификатами качества, действующим в нашей стране, а также за границей. Они выпускаются более чем двумя десятками производителей. Самые известные и часто встречающиеся среди них — это ЛЭЗ, СпецЭлектрод, Эсаб и др.

Эти электроды позволяют не только получить качественное соединение, но также дают возможность заметно увеличить производительность труда. Они просты и удобны в работе. Обладая такими качествами как быстрое зажигание дуги и стабильное горение, электроды позволяют создавать прочное и надежное соединение, в котором не будет слабых мест и полостей. Стержни могут использоваться не только профессиональными сварщиками, но также новичками сварного дела.

Какие параметры имеют электроды?

Вот какие параметры можно найти на упаковках разных изготовителей “МР-3”:

  • наплавка: 8,5 г/Ач;
  • расход: 1,7 кг на 1 кг наплавленного металла;
  • покрытие: рутил;
  • диаметр: 3 — 5 мм.

Сварка электродами допускается во всех положениях, исключая вертикальное “сверху-вниз”. Это дает возможность применять их даже в условиях сложного монтажа. Для работы вам потребуется переменный, либо постоянный ток.

“МР-3” привередливы к состоянию свариваемых поверхностей. Перед началом работ нужно провести их зачистку — удалить старое покрытие, избавить от влаги и пр. Если на кромках останется что-то лишнее, сварка может быть неэффективной и не качественной.

Во время сварки наблюдается минимальное разбрызгивание металла. Это экономит не только расходники, но также металл. Шлаковый слой, образуемый во время сварки, отделяется очень легко. На него не придется тратить много времени, что повысит производительность работ.

Стержни выпускаются в разных диаметрах. Соответственно ток для них нужно подбирать разный. Вот токи, подходящие для нижнего положения сварки:

  • 3 мм: 100 — 140 А;
  • 4 мм: 160 — 220 А;
  • 5 мм: 170 — 260 А;
  • 6 мм: 300 — 360 А.

Для вертикального положения:

  • 3 мм: 80 — 110 А;
  • 4 мм: 140 — 180 А;
  • 5 мм: 160 — 200 А.

Для потолочного положения:

  • 3 мм: 80 — 120 А;
  • 4 мм: 140 — 180 А.

Более точные значения можно подбирать самостоятельно, либо уточнять на упаковках.

Как пользоваться и правильно хранить электроды?

Цвет обмазки электродов “МР-3” от разных производителей может отличаться. Чаще всего можно встретить красное покрытие. Помимо него бывает также синее и серое. Цвет никак не сказывается на качестве электродов. Он не обозначает особые свойства или назначение.

Стержни поставляются в 3 видах упаковки — 1, 2,5 и 5 кг. Они оборачиваются в термоусадочную пленку, которая защищает изделия от проникновения влаги. Этих мер не всегда бывает достаточно. Нужно дополнительно позаботиться о хранении электродов. На них не должна попадать влага или грязь. Помещение, в котором они будут находиться, должно быть сухим, а температура в нем не должна опускаться ниже 15°С.

Отдельно позаботьтесь, чтобы на электроды не оказывалось никакого механического воздействия. Они не должны ничем придавливаться или падать с полок. Иначе покрытие может повредиться и работать ими будет проблематично.

Если получилось так, что электроды промокли, перед работой их следует прокалить в специальной печи. Для этого нужно поместить их туда на 1 час при температуре 180°С. После такой процедуры они будут полностью готовы к использованию.

Сварка может производится как на длинной дуге, так и с отрывом. Повторное зажигание производится очень легко. “МР-3” отлично подходят для простановки прихваток.

Заключение

Электроды, о которых мы сегодня говорили, являются очень популярными среди опытных сварщиков. Они могут применяться для совершенно разных работ и всегда отрабатывают хорошо. Они получили популярность за счёт невысокой цены и неплохого качества. Изготовители постоянно пытаются усовершенствовать их свойства и предлагают новые модификации, обладающие улучшенными качествами.

 

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