| 引用本文: | 杜全斌,魏金山,马成勇,金鹏,于德润,韩振仙,王华昆.煤矿机械用Q690高强钢抗裂性研究[J].材料科学与工艺,2014,22(5):114-118.DOI:10.11951/j.issn.1005-0299.20140520. |
| DU Quanbin,WEI Jinshan,MA Chengyong,JIN Peng,YU Derun,HAN Zhenxian,WANG Huakun.Study on cracking resistance of Q690 high strength steel for mining machinery[J].Materials Science and Technology,2014,22(5):114-118.DOI:10.11951/j.issn.1005-0299.20140520. |
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| 煤矿机械用Q690高强钢抗裂性研究 |
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杜全斌1,2,魏金山1,马成勇1,金鹏2,于德润3,韩振仙3,王华昆2
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(1.钢铁研究总院先进钢铁流程及材料国家重点实验室,北京 100081;2.昆明理工大学,昆明 650093;3.郑州煤矿机械集团股份有限公司,郑州 450013)
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| 摘要: |
| 对煤矿机械用Q690高强钢,采用其配套焊丝(GHS75M)进行抗裂性试验,并测定了焊丝熔敷金属扩散氢逸出特性,研究了焊缝金属残余扩散氢对试验用钢抗裂性的影响.结果表明:该钢具有一定的冷裂倾向.试验焊材熔敷金属扩散氢含量为1.7 mL/100 g,初期扩散氢逸出速率较大,在焊缝冷却过程中扩散氢可以较快逸出.残余扩散氢含量主要与从峰值温度到100 ℃温度区间的冷却时间t100有关,单道焊焊缝金属冷速快,t100较小,残余扩散氢较多,而多层多道焊增加了t100,且提高HDr100容许值,残余扩散氢含量很低.该钢采用焊后热处理是保守的工艺. |
| 关键词: Q690高强钢 抗裂性 扩散氢 熔敷金属 |
| DOI：10.11951/j.issn.1005-0299.20140520 |
| 分类号:TG113 |
| 基金项目: |
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| Study on cracking resistance of Q690 high strength steel for mining machinery |
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DU Quanbin1,2,WEI Jinshan1,MA Chengyong1,JIN Peng2,YU Derun3,HAN Zhenxian3,WANG Huakun2
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(1.Kunming University of Science and Technology,Kunming 650093;2.Central Iron and Steel Research Institute, Beijing 100081;3.Zhengzhou Coal Mining Machinery Group Co.,Ltd.,Zhengzhou 450013)
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| Abstract: |
| Cracking resistance test were carried out on the Q690 high strength steel with supporting wire(GHS75M), HD escape characteristics of deposited metal was measured, and the influence of residual diffusible hydrogen on cracking resistance of this steel was analyzed. The results show that the steel has high tendency to hard quenching. Diffusible hydrogen of deposited metal is 1.7 mL/100 g. At initial stage, the escape rate of HD is high, and HD is escaped quickly. Residual diffusible hydrogen content is mainly related with t100, single-pass welding is cold fast, corresponding, t100 is short, thus, there will be more HDr100. However, t100 is longer with multi-pass welding, in the same time, the allowable value of HDr100 is increased, and HDr100 is lower. Postweld heat treatment for this steel is a conservative process. |
| Key words: Q690 high strength steel cracking resistance diffusible hydrogen deposted metal |
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