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1. 发明专利

JPS5376918A MANUFACTURE OF FINE GRAIN STEEL 失效
公开(公告)号：JPS5376918A
公开(公告)日：1978-07-07
申请号：JP15321276
申请日：1976-12-20
申请人： NIPPON STEEL CORP
发明人： ITOU KAMETAROU , ONOUE YASUMITSU , YADA HIROSHI , TAMUKI RIYOU
IPC分类号： C22C38/00 , C21D6/00 , C21D8/00 , C21D8/02
摘要： PURPOSE:To economically manufacture fine grain steel in large quantities by heating a steel billet, more than a specified amt. of which is at ferrite phase, contg. one or more out of Al, Ti, Nb, Ta, Zr, Hf and V, a specified amt. of which is at solid solution state, and further contg. a specified amt. of C + N to a specified max. temp. followed by plastic working at the time of cooling.

2. 发明专利

JPS5352225A PRODUCTION OF ROLLD FINE GRAIN STEEL 失效
公开(公告)号：JPS5352225A
公开(公告)日：1978-05-12
申请号：JP12807676
申请日：1976-10-25
申请人： NIPPON STEEL CORP
发明人： TAMUKI RIYOU , ITOU KAMETAROU , YADA HIROSHI , ONOUE YASUMITSU
IPC分类号： C22C38/00 , C21D6/00 , C21D8/00 , C22C38/06
摘要： PURPOSE:To produce a fine grain steel with excellent toughness by casting an Al and N-contg. steel of a specified grade and carrying out the control of precipitation of AlN and rolling and working treatments in combination.

3. 发明专利

JPS5884922A SHORT TIME TEMPERING METHOD FOR STEEL 失效
公开(公告)号：JPS5884922A
公开(公告)日：1983-05-21
申请号：JP18345381
申请日：1981-11-16
申请人： NIPPON STEEL CORP
发明人： ONOUE YASUMITSU , TAMUKI RIYOU , NAKAJIMA HIROE , ISHIKAWA HIROSHI
IPC分类号： C21D1/18 , C21D1/34
摘要： PURPOSE:To reduce the time for heat treatments in the state of tempering of thick steel plates to be hardened and tempered by setting the temp. of a furnace at a temp. higher than the target tempering temp., and ending the tempering when the central temp. of the steel plates attains the desired tempering temp. CONSTITUTION:Steel plates are inserted into a furnace of which the atmosphere is set at >=700 deg.C. When the central temp. of the steel plates attains a desired temp., the steel plates are removed immediately from the furnace. Then larger differences than those in the prior art are produced in the surface parts and central parts of the steel plates between the tempering stage and the time when the tempering ends; the temp. is higher in the surface parts. Therefore the allowances for the decrease in the surface hardness occured in the stage of hardening by tempering increase and eventually the hardness distributions in the thickness direction when the tempering ends flatten equal to or more than those in the prior art. Here the reason for limiting the furnace temp. lies in that the steel plates are heated in a shorter time. The higher furnace temp. is more preferable, but ordinary tempering temp. is lower than Ac1 and the purpose for said limitation is to heat the plates in the time shorter than that at said temp. The upper limit of the furnace temp. is determined by restrictions in the construction and equipment of the furnace.

4. 发明专利

JPS55113834A MANUFACTURE OF TOUGH STEEL 失效
公开(公告)号：JPS55113834A
公开(公告)日：1980-09-02
申请号：JP2175279
申请日：1979-02-26
申请人： NIPPON STEEL CORP
发明人： TAMUKI RIYOU , ONOUE YASUMITSU , UMENO MASANORI
IPC分类号： C22C38/00 , C21D8/00 , C21D8/02 , C22C38/04 , C22C38/12 , C22C38/14
摘要： PURPOSE:To produce tough and hard steel material having no unevenness in hardness distribution in the direction of plate thickness, by heating a billet of a specific composition to a temp. not lower then 1,000 deg.C to complete hot rolling at a temp. 800-1,000 deg.C, then by quenching the steel material. CONSTITUTION:A steel material contg.

5. 发明专利

JPS5845320A PRODUCTION OF FINE GRAIN PRECIPITATION HARDENING TYPE STEEL MATERIAL 失效
公开(公告)号：JPS5845320A
公开(公告)日：1983-03-16
申请号：JP14485081
申请日：1981-09-14
申请人： NIPPON STEEL CORP
发明人： SATOU MAKOTO , SOGOU YASUO , MORIKAWA HIROBUMI , KAKO KATSUO , TAMUKI RIYOU
IPC分类号： C22C38/00 , B21B3/00 , B22D11/00 , C21D8/00
摘要： PURPOSE:To obtain a fine grain precipitation hardening type hard material having high strength and toughness by casting continuously low alloy steel of a specific compsn. and subjecting the steel to accelerative cooling, heating, rolling and accelerative cooling under limited conditions. CONSTITUTION:The steel contg. =1 kind among B, V, Nb, Ta, Ti, Zr, rare earth elements, Al, Ca, and if necessary, Ni, Cr, Mo, Cu, W is cast continuously. The ingot is acceleratively cooled at >=5 deg.C/min down below the Ar3 point to maintain carbonitride in a solid soln. state. The ingot is heated above the Ac3 point and is reduced down at >=5% in an unrecrystallization temp. region to a product thickness. After said rolling, the steel material is subjected to accelerative cooling. According to said method, precipitation hardening is utilized perfectly, and the fine grain precipitation hardening type steel material is obtained earily with low alloy components.

6. 发明专利

JPS57152430A COOLING METHOD FOR OBTAINING STEEL PLATE OF REDUCED HARDNESS IRREGULARITY IN THICKNESS DIRECTION 失效
公开(公告)号：JPS57152430A
公开(公告)日：1982-09-20
申请号：JP3659481
申请日：1981-03-16
申请人： NIPPON STEEL CORP
发明人： NAKASHIMA HIROE , ONOUE YASUMITSU , TAMUKI RIYOU , KATSUTA FUKUO
IPC分类号： B21B45/02 , C21D9/52 , C21D9/573
摘要： PURPOSE:To make the hardness in the central part of a steel plate almost the same as the hardness of the surface by dividing the temp. region from the end temp. of the rolling and finishing up to ordinary temp. to two stages, and cooling the steel plate weakly in the fore stage and strongly in the post stage. CONSTITUTION:After a steel plate is cooled to Ac3-1,250 deg.C, it is completed of rolling at >=Ar3, Next, this rolled steel plate is cooled at the density of the water flow at which the desired hardness of the steel plate surface is obtained, for example, at about 0.3-0.7m /min.m density of the water flow. When the temp. of the steel plate surface attains the temp. to determine the final hardness of the steel plate surface, the steel plate is cooled at the density of the water flow higher than the above-described density of the water flow, for example, at >=1m /min.m density of the water flow.

7. 发明专利

JPS5776126A Manufacture of tough steel 失效
标题翻译：粗钢制造
公开(公告)号：JPS5776126A
公开(公告)日：1982-05-13
申请号：JP15141780
申请日：1980-10-30
申请人： Nippon Steel Corp
发明人： MATSUDA HIROO , TAMEHIRO HIROSHI , OOHASHI MAMORU , ONOUE YASUMITSU , TAMUKI RIYOU
IPC分类号： C22C38/00 , C21D8/02
CPC分类号： C21D8/0226 , C21D2211/002 , C21D2211/005
摘要： PURPOSE: To obtain excellent porperty of welding and toughness by working the steel billet containing predetermined amounts of C, Si, Mn, Ti, S, Ca, O, N etc. under specified conditions.
CONSTITUTION: The steel which contains C;0.005W0.08%, Si≤0.6%, Mn;0.4W2.4%, Nb;0.01W0.05%, Ti;0.005W0.025%, S;≤0.03%, Ca;0.0005W0.005%, O;≤0.005%, N;≤ 0.005% etc. and further is satisfied with the formula is made into melt. Then, the steel billet cast from this steel melt is heated at the temperature; 900W1,000°C and hot-rolled at the draft below 900°C;≥60%, the finishing temperature (Ar
3 transformation point +20°C)W(Ar
3 transformation point -10°C), thereafter cooled below 300°C at cooling speed 15W60°C/sec.
COPYRIGHT: (C)1982,JPO&Japio
摘要翻译：目的：通过在规定条件下加工含有规定量的C，Si，Mn，Ti，S，Ca，O，N等的钢坯，以获得良好的焊接和韧性。构成：含有C：0.005-0.08％，Si <= 0.6％，Mn：0.4-2.4％，Nb：0.01-0.05％，Ti：0.005-0.025％，S：0.03％，Ca：0.0005 -0.005％，O; <= 0.005％，N; <= 0.005％等，并且进一步满足公式被熔化。然后，从该钢熔体铸造的钢坯在该温度下加热; 900-1,000℃，在900℃以下的热处理下进行热轧;> = 60％，终轧温度（Ar3相变点+ 20℃） - （Ar 3相变点-10℃）冷却至300℃以下，冷却速度为15-60℃/秒。

8. 发明专利

JPS5739127A Strengthening treatment of steel 失效
标题翻译：强化钢的处理
公开(公告)号：JPS5739127A
公开(公告)日：1982-03-04
申请号：JP11406380
申请日：1980-08-21
申请人： Nippon Steel Corp
发明人： ONOUE YASUMITSU , TAMUKI RIYOU , UMENO MASANORI
IPC分类号： C21D8/02
CPC分类号： C21D8/02
摘要： PURPOSE:To obtain desired strength on all steel plate materials regardless of plate thickness, by rolling the steel containing each prescribed amount of C, Si, Mn and Al at a prescribed temperature and by cooling it uniformly at a prescribed water amount density. CONSTITUTION:The steel comprising 0.3% or less C, 1% or less Si, 2.5% or less Mn, 0.1% or less Al and the remainder of Fe is heated at over 1,000 deg.C, and then the heated steel is rolled so that the temperature of the steel when its rolling is completed becomes under 900 deg.C. Subsequently, the rolled steel is cooled with water at a water amount density of 0.7+ or -0.3m /min.m per one side. The steel thus obtained has a constant level of strength on all plate thickness regardless of plate thickness.
摘要翻译：目的：无论板厚如何，在所有钢板材料上获得所需的强度，通过将规定量的C，Si，Mn和Al的钢在规定温度下轧制，并以规定的水量密度均匀地冷却。构成：将含有0.3％以下的Si，1％以下的Si，2.5％以下的Mn，0.1％以下的Al和余量的Fe加热到1000℃以上，然后将被加热的钢卷成当轧制完成时，钢的温度在900℃以下。随后，用水在每一侧用水量密度为0.7+或-0.3m 3 / min.m 2的方式冷却轧制钢。由此获得的钢板与板厚无关地在所有板厚度上具有恒定的强度水平。

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