METHOD OF PRODUCING COLD-DEFORMED COUPLING PIPES OF 108×18×7,400-7,600 MM SIZE FROM CORROSION-RESISTANT ALLOY OF ХН30МДБ GRADE

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专利权人:

Komarov Andrej Ilich

发明人:

Safyanov Anatolij Vasilevich

申请号：

RU20160110240

公开号：

RU2615386(C1)

申请日:

2016.03.22

申请国别(地区):

俄罗斯

年份:

2017

代理人:

摘要：

FIELD: metallurgy.SUBSTANCE: invention relates to the production of coupling pipes of size 108×18×7,400-7,600 mmof a corrosion-resistant alloy of "ХН30МДБ" grade. As blanks for production of coupling pipes, hollow centrifugal cast billets are used of size 460×120×2,700±50 mm from alloy "ХН30МДБ" grade for rolling them on Pilger mill into hot-rolled pipe stock. In this case, rolling at CRM is performed into cold-deformed coupling pipes of size 108×18×7,400-7,600 mmwith a relative reduction of the wall δ=8.0%, δ=8.7%, δ=7.1%, δ=7.7% and drawing factor μ=1.38, μ=1.46, μ=1.40, μ=1.37.EFFECT: reducrf metal consumption in the manufacture of cold-deformed coupling pipes.1 tbl

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