Title:
DEVELOPMENT METHOD FOR HIGH-STRENGTH AND HIGH-TOUGHNESS NODULAR CAST IRON FOR WIND ELECTRICITY
Document Type and Number:
WIPO Patent Application WO/2018/166247
Kind Code:
A1
Abstract:
A development method for high-strength and high-toughness nodular cast iron for wind electricity, comprising the following steps: step 1, proportioning of smelting furnace burden, specifically, pig iron: scrap steel: foundry returns = 40%-60%:15%-30%:15%-30%, and adding a certain amount of ferrosilicon 75 to a furnace; step 2, adding 1% of nodular cast iron nodulizing agent, 0.2%-0.4% of high calcium barium inoculant, 30-60 g/t of Sb, and weight into a pit of a nodulizing ladle in sequence; and step 3, pouring molten iron into another pit from the furnace, and adding 0.1%-0.2% of stream inoculant during pouring, the pouring temperature being 1350°C. By controlling the nodulizing agent and microelements, the tendency of fragment-shaped graphite brought by high silicon is eliminated, and a good mechanical property is ensured.
Inventors:
YANG JINDE (CN)
JIANG GUANGJIE (CN)
ZHOU ZHANGSONG (CN)
ZHANG YAJUN (CN)
XU YUSONG (CN)
CHEN LIXIN (CN)
PAN YE (CN)
JIANG GUANGJIE (CN)
ZHOU ZHANGSONG (CN)
ZHANG YAJUN (CN)
XU YUSONG (CN)
CHEN LIXIN (CN)
PAN YE (CN)
Application Number:
PCT/CN2017/115296
Publication Date:
September 20, 2018
Filing Date:
December 08, 2017
Export Citation:
Assignee:
JIANGSU HONGDE SPECIAL PARTS CO LTD (CN)
International Classes:
C22C37/04; C22C33/08
Domestic Patent References:
| WO2015027648A1 | 2015-03-05 |
Foreign References:
| CN107142416A | 2017-09-08 | |||
| CN106191640A | 2016-12-07 | |||
| CN104988381A | 2015-10-21 |
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